If protocol client needs to make step-into async call:
- pause before async call using any Debugger agent capabilities,
- call Debugger.stepInto with breakOnAsyncCall flag,
- wait for Debugger.paused event, this event will contain
asyncCallStackTrace if async call is scheduled,
- call Debugger.pauseOnAsyncCall on each known target,
- resume execution in current debugger by Debugger.resume.
Bug: chromium:778796
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I40c56278e7b1ceafc3bf81608b8ca6716c2b3168
Reviewed-on: https://chromium-review.googlesource.com/773573
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49594}
Sometimes we need to capture stack trace on one debugger and use it
later as a parent stack on another debugger (e.g. worker.postMessage).
This CL includes following addition to our protocol and v8-inspector.h:
- added Runtime.StackTraceId, this id represents stack trace captured
on debugger with given id,
- protocol client can fetch Runtime.StackTrace by
Runtime.StacKTraceId using Debugger.getStackTrace method,
- externalParent field is added to Debugger.paused event, it may
contain external parent stack trace,
- V8Inspector::storeCurrentStackTrace captures current stack trace
and returns V8StackTraceId for embedder this id can be used as
argument for V8Inspector::externalAsyncTaskStarted and
V8Inspector::externalAsyncTaskFinished method. Any async stack
trace captured between these calls will get passed external stack
trace as external parent. These methods are designed to be called
on different debuggers. If async task is scheduled and started on
one debugger user should continue to use asyncTask* API,
- Debugger.enable methods returns unique debuggerId.
TBR=dgozman@chromium.org,jgruber@chromium.org
Bug: chromium:778796
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I2c1a2b2e30ed69ccb61d10f08686f4edb09f50e4
Reviewed-on: https://chromium-review.googlesource.com/786274
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49591}
This reverts commit 3a41b697cd.
Reason for revert: Break msvc: https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20msvc/builds/250
Original change's description:
> [inspector] introduced stackTraceId and externalAsyncTask API
>
> Sometimes we need to capture stack trace on one debugger and use it
> later as a parent stack on another debugger (e.g. worker.postMessage).
>
> This CL includes following addition to our protocol and v8-inspector.h:
> - added Runtime.StackTraceId, this id represents stack trace captured
> on debugger with given id,
> - protocol client can fetch Runtime.StackTrace by
> Runtime.StacKTraceId using Debugger.getStackTrace method,
> - externalParent field is added to Debugger.paused event, it may
> contain external parent stack trace,
> - V8Inspector::storeCurrentStackTrace captures current stack trace
> and returns V8StackTraceId for embedder this id can be used as
> argument for V8Inspector::externalAsyncTaskStarted and
> V8Inspector::externalAsyncTaskFinished method. Any async stack
> trace captured between these calls will get passed external stack
> trace as external parent. These methods are designed to be called
> on different debuggers. If async task is scheduled and started on
> one debugger user should continue to use asyncTask* API,
> - Debugger.enable methods returns unique debuggerId.
>
> Bug: chromium:778796
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
> Change-Id: I16aba0d04bfcea90f3e187e635a0588c92354539
> Reviewed-on: https://chromium-review.googlesource.com/754183
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49582}
TBR=dgozman@chromium.org,pfeldman@chromium.org,yangguo@chromium.org,kozyatinskiy@chromium.org,jgruber@chromium.org
Change-Id: I9b52354fa0841e5148596cf594317f2e5fe508ea
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:778796
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/786152
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49584}
Sometimes we need to capture stack trace on one debugger and use it
later as a parent stack on another debugger (e.g. worker.postMessage).
This CL includes following addition to our protocol and v8-inspector.h:
- added Runtime.StackTraceId, this id represents stack trace captured
on debugger with given id,
- protocol client can fetch Runtime.StackTrace by
Runtime.StacKTraceId using Debugger.getStackTrace method,
- externalParent field is added to Debugger.paused event, it may
contain external parent stack trace,
- V8Inspector::storeCurrentStackTrace captures current stack trace
and returns V8StackTraceId for embedder this id can be used as
argument for V8Inspector::externalAsyncTaskStarted and
V8Inspector::externalAsyncTaskFinished method. Any async stack
trace captured between these calls will get passed external stack
trace as external parent. These methods are designed to be called
on different debuggers. If async task is scheduled and started on
one debugger user should continue to use asyncTask* API,
- Debugger.enable methods returns unique debuggerId.
Bug: chromium:778796
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I16aba0d04bfcea90f3e187e635a0588c92354539
Reviewed-on: https://chromium-review.googlesource.com/754183
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49582}
Old instrumentation was designed to collect promise creation stack and
promise scheduled stack together. In DevTools for last 6 months we
show only creation stack for promises. We got strong support from users
for new model. Now we can drop support for scheduled stacks and
simplify implementation.
New promise instrumentation is straightforward:
- we send kDebugPromiseThen when promise is created by .then call,
- we send kDebugPromiseCatch when promise is created by .catch call,
- we send kDebugWillHandle before chained callback and kDebugDidHandle
after chained callback,
- and we send separate kDebugAsyncFunctionPromiseCreated for internal
promise inside async await function.
Advantages:
- we reduce amount of captured stacks (we do not capture stack for
promise that constructed not by .then or .catch),
- we can consider async task related to .then and .catch as one shot
since chained callback is executed once,
- on V8 side we can implement required instrumentation using only
promise hooks,
Disadvantage:
- see await-promise test, sometimes scheduled stack was useful since we
add catch handler in native code,
Implementation details:
- on kInit promise hook we need to figure out why promise was created.
We analyze builtin functions until first user defined function on
current stack. If there is kAsyncFunctionPromiseCreate function then
we send kDebugAsyncFunctionPromiseCreated event. If there is
kPromiseThen or kPromiseCatch then only if this function is bottom
builtin function we send corresponded event to inspector. We need it
because Promise.all internally calls .then and in this case we have
Promise.all and Promise.then on stack at the same time and we do not
need to report this internally created promise to inspector.
Bug: chromium:778796
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I53f47ce8c5c4a9897655c3396c249ea59529ae47
Reviewed-on: https://chromium-review.googlesource.com/765208
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49553}
When collecting source ranges for conditionals (`a ? b : c`), include
the '?' and ':' tokens in the then- and else ranges, respectively.
Bug: v8:7098
Change-Id: I22315e2040c96c977e0b49e1fafe4228a6558471
Reviewed-on: https://chromium-review.googlesource.com/778321
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49484}
At the moment the inspector tests do not dispose the isolate. This is a
problem because the disposal of the isolate is used to stop the
execution of background tasks. The missing disposal of the isolate
caused flaky tests on the bots recently. With this CL the isolates of
the inspector tests get disposed.
The disposal of the isolate requires the following changes: 1) Store the
isolate in a unique_ptr so that it gets disposed when the isolate-data
gets disposed. It is necessary to use the unique_ptr so that the isolate
gets disposed after other members of isolate-data get disposed. 2)
Dispose all sessions. The reason is that the sessions require the
isolate to exist when they get disposed because they own handles.
Sessions, however, are stored in a static map, whereas the isolate is
stored indirectly in a local variable of the main function. Since local
variables get disposed before the static map is cleared, we have to
clear the map before the end of the main function.
R=kozyatinskiy@chromium.org
Change-Id: Icb33184de254638b6cdfb899e940f18e6064cd69
Reviewed-on: https://chromium-review.googlesource.com/774885
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49424}
With this CL, {CreateDefaultPlatform} returns a unique_ptr to indicate
that the caller owns the returned memory. We had several memory leaks
where the memory of the DefaultPlatform did not get deallocated.
In addition, the {TracingController} of the {DefaultPlatform} also gets
received as a unique_ptr. Thereby we document that the {DefaultPlatform}
takes ownership of the {TracingController}. Note that the memory of the
{TracingController} was already owned by the {DefaultPlatform}, but it
was not documented in the interface, and it was used incorrectly in
tests.
This CL fixes the asan issues in
https://chromium-review.googlesource.com/c/v8/v8/+/753583
([platform] Implement TaskRunners in the DefaultPlatform)
R=rmcilroy@chromium.org
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I0d1a6d3b22bb8289dc050b1977e4f58381cec675
Reviewed-on: https://chromium-review.googlesource.com/755033
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49349}
We need to throw before rethrowing, otherwise the exception does
not trigger a debugger event and is not reported if uncaught.
R=gsathya@chromium.org, jgruber@chromium.org
Bug: v8:7047
Change-Id: I7ce0253883a21d6059e4e0ed0fc56dc55a0dcba6
Reviewed-on: https://chromium-review.googlesource.com/758372
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49237}
The sampling heap profiles can now be retrieved without stopping
the profiler.
BUG=v8:6887
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I491206d0bafd7d4e198622117c12aab0057e6bc6
Reviewed-on: https://chromium-review.googlesource.com/749700
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49160}
In current implementation Object.getOwnPropertyDescriptor calls native
getter. It can produce side effects. We can avoid calling it.
DevTools frontend will show clickable dots and on click returns value.
This CL does not affect Blink and only affect several Node.js
properties, e.g. process.title.
R=yangguo@chromium.org
Bug: v8:6945
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I5764c779ceed4d50832edf68b2b4c6ee2c2dd65c
Reviewed-on: https://chromium-review.googlesource.com/754223
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49152}
It is preparation step for step-into-worker. There are few changes:
- added breakOnAsyncCall flag for Debugger.stepInto. When flag is set
and async task is scheduled before step-into finished, we pause
execution with additional Debugger.paused event. This event contains
additional scheduledAsyncTaskId field.
- added Debugger.pauseOnAsyncTask. This method will pause execution as
soon as given async task is started.
This mechanism is replacement for Debugger.scheduleStepIntoAsync which
can not be used between multiple targets.
As result we can split async task scheduling in one target and
requesting break for this async task running in another target.
R=pfeldman@chromium.org
Bug: chromium:778796
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I77be0c880d91253d333c54a23a4c084e7b8549e9
Reviewed-on: https://chromium-review.googlesource.com/750071
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49127}
DebugBreak bytecode fetches current return value from debugger prior
dispatching original handler. So we can change its value on break.
R=leszeks@chromium.org,rmcilroy@chromium.org
Bug: chromium:656150
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I82d0bc82ff49923a748c0084d252d0fd214a2db8
Reviewed-on: https://chromium-review.googlesource.com/731679
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49122}
The status-file flags and the flags from the test case's source code
must always overwrite extra flags set by bots.
Bug: v8:6924
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I0e2aabb69da7cfb8ba6c1c79bd3851462071a6ac
Reviewed-on: https://chromium-review.googlesource.com/732656
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49001}
Currently we incorrectly show global object as arrow function receiver.
With this CL:
- if this is used inside of function we show correct this value,
- if this is unused and V8 optimizes it out - we show undefined.
Second is known issue which we should address separately.
R=dgozman@chromium.org,yangguo@chromium.org
Bug: chromium:552753
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Iac88a07fe622eb9b2f8af7ecbc4a32a56c8cdfaa
Reviewed-on: https://chromium-review.googlesource.com/723840
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48839}
Instead of re-iterating over the heap all the time, use the
list of feedback vectors on the isolate. This also avoids GC of vectors.
Bug: v8:5935
Change-Id: I0bb96fcf2b0feb9856e9806f812188de1fc7b37e
Reviewed-on: https://chromium-review.googlesource.com/668396
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48643}
This is a reland of 61292f0b60
Original change's description:
> [inspector] breakpoint after last break position should not jump to first line
>
> R=jgruber@chromium.org
>
> Bug: chromium:730177
> Change-Id: I0f3666a333604cb80bb51410c5edf2aceb0c6ef5
> Reviewed-on: https://chromium-review.googlesource.com/717717
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48556}
TBR=jgruber@chromium.org
Bug: chromium:730177
Change-Id: I564cc5d7778f9d79780eae9dbe2d9aafaad4f466
Reviewed-on: https://chromium-review.googlesource.com/721468
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48615}
Use case: anonymous script with sourceMappingUrl. User can set
breakpoint in source with sourceUrl from sourceMap, we persist this
breakpoint in DevTools and on page reload breakpoint should be restored
correctly.
Debugger.setBreakpointByUrl method provides capabilities to set
provisional breakpoints and looks like best candidate for new "scriptHash"
argument.
I considered other options such as replacing scriptId with something
more persistent like "script-hash:script-with-this-hash-number" but it
looks more complicated and doesn't provide clear advantages.
One pager: http://bit.ly/2wkRHntR=pfeldman@chromium.org
Bug: chromium:459499
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I0e2833fceffe6b04afac01d1a4522d6874b6067a
Reviewed-on: https://chromium-review.googlesource.com/683597
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48357}
Use the (D)CHECK_{EQ,NE,GT,...} macros instead of (D)CHECK with an
embedded comparison. This gives better error messages and also does the
right comparison for signed/unsigned mismatches.
This will allow us to reenable the readability/check cpplint check.
R=yangguo@chromium.org
Bug: v8:6837
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I88e5afea1ad0fdf23a81b380e64ff356bbc20112
Reviewed-on: https://chromium-review.googlesource.com/681374
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48138}
Before we used to require compiled debugger script to report Scopes.
After migration inspection to brand-new native API we can report
Scopes all the time and remove this hidden dependency.
R=dgozman@chromium.org
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I3530bc7ead691a51073e384aea4a4ef428dc94da
Reviewed-on: https://chromium-review.googlesource.com/662097
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47982}
JavaScript is a dynamically typed language. But most code is
written with fixed types in mind. When debugging JavaScript,
it is helpful to know the types of variables and parameters
at runtime. It is often hard to infer types for complex code.
Type profiling provides this information at runtime.
Node.js uses the inspector protocol. This CL allows Node.js users
to access and analyse type profile for via Node modules or the
in-procress api. Type Profile helps developers to analyze
their code for correctness and performance.
Design doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
Add `takeTypeProfile` to the inspector protocol. It returns a list
of TypeProfileForScripts, which in turn contains the type profile for
each function. We can use TypeProfile data to annotate JavaScript code.
Sample script with data from TypeProfile:
function f(/*Object, number, undefined*/a,
/*Array, number, null*/b,
/*boolean, Object, symbol*/c) {
return 'bye';
/*string*/};
f({}, [], true);
f(3, 2.3, {a: 42});
f(undefined, null, Symbol('hello'));/*string*/
Bug: v8:5933
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I626bfb886b752f90b9c86cc6953601558b18b60d
Reviewed-on: https://chromium-review.googlesource.com/508588
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47920}
Runtime.CallFrame has url already. It allows to show stack traces on pause
without tacking all parsed scripts.
R=alph@chromium.org,pfeldman@chromium.org
Bug: chromium:762982
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ic4f096ade1cb6c9de42fec77280dcc3007c6a5cf
Reviewed-on: https://chromium-review.googlesource.com/648068
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47895}
To enable executing code in a context of a particular time or date (e.g. when
codepath depends on whether it's say evening or New Year) there is a need for
a way to provide it bypassing actual system time.
Bug: chromium:751993
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Iee35d97b74345f63fff814a65a6f134d7c970341
Reviewed-on: https://chromium-review.googlesource.com/598666
Commit-Queue: Sergei Datsenko <dats@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47700}
As part of J2V8 development (https://github.com/eclipsesource/J2V8),
we realized that we had a subtle bug in how Isolate scope was created
and it's lifetime managed, see:
https://github.com/eclipsesource/J2V8/issues/313.
Mentioned above bug was fixed, however, what we also noticed is that
V8 API has been constantly and slowly moving to such an API, in which
one has to pass Isolate explicitly to methods and/or constructors. We
found two more places that might have been overlooked. This contribution
adds passing of Isolate pointer explicitly to constructors of
String::Utf8Value and String::Value classes.
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng;master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I61984285f152aba5ca922100cf3df913a9cb2cea
Reviewed-on: https://chromium-review.googlesource.com/593309
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47656}
This is so that precise coverage starts with a clean slate.
The old behavior can be emulated by calling getBestEffortCoverage
before starting precise coverage.
R=jgruber@chromium.org
Bug: chromium:757998
Change-Id: Ib3ee2316966f676456198159bdcf8ba8b9d3896f
Reviewed-on: https://chromium-review.googlesource.com/635084
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47629}
Currently, injected script source adds natural object properties before
internal properties. This can result in important ones such as
"[[PrimitiveValue]]" being left out. This CL
- makes sure internal properties are always added to preview
- removes unused "[[Iterator*]]" properties from preview
- boxed strings (e.g. new String("foo")) will not send unnecessary
properties 0:"f", 1:"o", 2:"o" if the [[PrimitiveValue]] is sent.
Bug: chromium:567265
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Icd5c7410351f371055277ce471226cc6fb5a861f
Reviewed-on: https://chromium-review.googlesource.com/634584
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Erik Luo <luoe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47622}
This patch re-writes the call-function-on-async.js test according
to the new style.
R=kozy
Change-Id: I0541d336fe2bba3197170b0cc22c70e96d8543aa
Reviewed-on: https://chromium-review.googlesource.com/636691
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47621}
API resolves functions to its .prototype property to make possible
queries like queryObjects(Object), queryObjects(HTMLElement), e.t.c.
R=dgozman@chromium.org
Bug: v8:6732
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ie8dc2288fa7e59c69f9b2647a9d5e35f0ac9215f
Reviewed-on: https://chromium-review.googlesource.com/630244
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47561}
Add "detailed" flag to Profiler.startPreciseCoverage to specify
granularity (block coverage vs function coverage).
The default value is currently set to FLAG_block_coverage, which
is currently true. This is so that the V8 roll does not break
LayoutTests. I'll set it to false once I made changes to Blink.
R=jgruber@chromium.org, pfeldman@chromium.org
Bug: v8:6738
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I7242e897ab02713188a5292ca8c8bb58985e3a9b
Reviewed-on: https://chromium-review.googlesource.com/625616
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47533}
This API generates inspectRequested call with hints.queryObjects flag.
It's not possible to expose this method by itself since command line
API methods can leak.
R=pfeldman@chromium.org
Bug: v8:6732
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I3c582186f65d84a25eed910925a1b6ab36966a72
Reviewed-on: https://chromium-review.googlesource.com/622370
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47480}
Runtime.queryObjects method:
1. force gc,
2. iterate through heap and get all objects with passed constructorName
or with passed constructor name in prototype chain,
3. return these objects as JSArray.
Main use case is regression tests for memory leaks.
R=pfeldman@chromium.org,alph@chromium.org,ulan@chromium.org
Bug: v8:6732
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I52f0803366f14bb24376653615d870a4f21f83e7
Reviewed-on: https://chromium-review.googlesource.com/619594
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47478}
This is a reland of 21da12a983
Original change's description:
> [Compiler] Remove CompileDebugCode and EnsureBytecode and replace with Compile
>
> Removes the Compiler::CompileDebugCode and Compiler::EnsureBytecode functions
> and replaces them with a Compiler::Compile(Handle<SharedFunctionInfo> shared)
> function. The code in compiler.cc is refactored to use this function to compile
> the SharedFunctionInfo when compiling a JSFunction.
>
> Also does some other cleanup:
> - Removes CompileUnoptimizedFunction and inlines into new Compiler function
> - Moves code to create top level SharedFunctionInfo into CompilerTopLevel and
> out of FinalizeUnoptimizedCompile.
>
> BUG=v8:6409
>
> Change-Id: Ic54afcd8eb005c17f3ae6b2355060846e3091ca3
> Reviewed-on: https://chromium-review.googlesource.com/613760
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47394}
TBR=yangguo@chromium.orgTBR=jarin@chromium.org
Bug: v8:6409
Change-Id: If2eae66a85f129e746a5ca5c04935540f3f86b04
Reviewed-on: https://chromium-review.googlesource.com/618886
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47399}
This reverts commit 21da12a983.
Reason for revert: Failing on arm64 simulator
Original change's description:
> [Compiler] Remove CompileDebugCode and EnsureBytecode and replace with Compile
>
> Removes the Compiler::CompileDebugCode and Compiler::EnsureBytecode functions
> and replaces them with a Compiler::Compile(Handle<SharedFunctionInfo> shared)
> function. The code in compiler.cc is refactored to use this function to compile
> the SharedFunctionInfo when compiling a JSFunction.
>
> Also does some other cleanup:
> - Removes CompileUnoptimizedFunction and inlines into new Compiler function
> - Moves code to create top level SharedFunctionInfo into CompilerTopLevel and
> out of FinalizeUnoptimizedCompile.
>
> BUG=v8:6409
>
> Change-Id: Ic54afcd8eb005c17f3ae6b2355060846e3091ca3
> Reviewed-on: https://chromium-review.googlesource.com/613760
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47394}
TBR=rmcilroy@chromium.org,yangguo@chromium.org,jarin@chromium.org,leszeks@chromium.org
Change-Id: I4ba63e82417a185f1528ff2633eb6c8872fbbfe5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6409
Reviewed-on: https://chromium-review.googlesource.com/618687
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47397}
Removes the Compiler::CompileDebugCode and Compiler::EnsureBytecode functions
and replaces them with a Compiler::Compile(Handle<SharedFunctionInfo> shared)
function. The code in compiler.cc is refactored to use this function to compile
the SharedFunctionInfo when compiling a JSFunction.
Also does some other cleanup:
- Removes CompileUnoptimizedFunction and inlines into new Compiler function
- Moves code to create top level SharedFunctionInfo into CompilerTopLevel and
out of FinalizeUnoptimizedCompile.
BUG=v8:6409
Change-Id: Ic54afcd8eb005c17f3ae6b2355060846e3091ca3
Reviewed-on: https://chromium-review.googlesource.com/613760
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47394}
This one allows us to support custom promises implementation.
With awaitPromise flag Runtime.evaluate awaits
Promise.resolve(<expression result>).
This also allows to await for any non-Promise value, similar to await
expression, which is more convenient for most protocol users.
R=dgozman@chromium.org
Bug: chromium:755104
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Iee798b33b6fb7de7d393372e164c0481d1bbf7eb
Reviewed-on: https://chromium-review.googlesource.com/614308
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47354}
As long as we have scripts with negative source offset (see inline event listeners) we should not crash a browser when get negative offset.
R=jgruber@chromium.org
Bug: chromium:750592
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ic3138e7c61ec0a5133c56de9970acdffa5536d8e
Reviewed-on: https://chromium-review.googlesource.com/611613
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47318}
This changes the baseline of an inspector test setting breakpoints
within an asm.js module while the module is being executed. With the
validator it is not supported to switch from active WebAssembly code
back to debuggable interpreter code. Hence some previously expected
breakpoints no longer fire, the behavior is consistent across all
configurations now though.
R=yangguo@chromium.org
TEST=inspector/debugger/asm-js-breakpoint-during-exec
BUG=v8:6166
Change-Id: Ie1bb62fa6df28b10336b4cb5d381d2141eec356c
Reviewed-on: https://chromium-review.googlesource.com/608977
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47301}
protocol::HashMap(std::unordered_map)::iterator doesn't provide any
guarantees about iteration order. At least Visual C++ from vS 2015 and
clang compile for loop inside forEachSession differently.
For tests we need stable order of iteration, so let's use std::map
instead.
R=dgozman@chromium.org
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I329cb24cd182baa86c0ea4a526257856718f32b1
Reviewed-on: https://chromium-review.googlesource.com/609489
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47281}
Removes the pathways to use Full-Codegen from compiler.cc. Also removes all
paths to optimize using AstGraphBuilder, which relies on Full-codegen.
Cleans up ast-numbering, runtime-profiler and some runtime functions to
remove now dead code.
This makes Full-codegen and AstGraphBuilder dead, but doesn't remove their
code yet, that will be done in a followup CL to keep things reviewable.
BUG=v8:6409
Change-Id: I3901ff17d960b2bb084cef0cb39fa16cb8419881
Reviewed-on: https://chromium-review.googlesource.com/583328
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47277}
This is in preparation to the removal of the FullCodeGenerator, we no
longer need the ability to stress the underlying implementation.
R=rmcilroy@chromium.org
BUG=v8:6409
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: Iad3177d6de4a68b57c12a770b6e85ed7a9710254
Reviewed-on: https://chromium-review.googlesource.com/584747
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47276}
Original intention of longScript was to check how hashing works with long
script source. Current implementation calculates hash for longString function,
it's non reliable since Function.toString is still not specified and can return
different line endings on different architectures.
TBR=dgozman@chromium.org
Bug: none
Change-Id: I4c5b6f30c2849a1a2702c74665b86ced731f1b28
Reviewed-on: https://chromium-review.googlesource.com/609486
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47268}
On context destroyed we discard corresponded injected-script and won't be able to wrap async evaluation result, so we can resolve callback with an error right now.
R=dgozman@chromium.org
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ib62f255297f306ad9f2c96a2a5b80e4b5aa33475
Reviewed-on: https://chromium-review.googlesource.com/604213
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47267}
Most methods on runtime agent are available when agent is disabled, we compile
injected-script lazily and should not invalidate it on runtime.disable since it
will invalidate all related objectIds.
R=dgozman@chromium.org
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I86f3c5d6908862cd4c0847c433f35a6d83c6396b
Reviewed-on: https://chromium-review.googlesource.com/607153
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47265}
If objectGroup is console we should correctly save last evaluated result to expose for next console call in $_ variable.
R=dgozman@chromium.org
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ie0ba2d302606b1c9f096a9a3a107a51a80556c49
Reviewed-on: https://chromium-review.googlesource.com/598936
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47097}
Consider:
function f() {
return;
}
This CL ensures that the closing brace is considered as covered by
introducing a special case for open-ended range rewrites when the
parent range is the function range itself.
Bug: v8:6000, v8:6661
Change-Id: I0be307759967e9f4df245a4f367326a37dda86fd
Reviewed-on: https://chromium-review.googlesource.com/597651
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47079}
Node.js doesn't have good place to call contextDestroyed.
We need to cleanup everything on our side to allow clients to not call
contextDestroyed method.
R=dgozman@chromium.org,eostroukhov@chromium.com
Bug: none
Change-Id: Ibe3f01fd18afbfa579e5db66ab6f174d5fad7c82
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/575519
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#46849}
Reviewed-on: https://chromium-review.googlesource.com/596549
Cr-Commit-Position: refs/heads/master@{#47060}
- rewritten test using new harness,
- removed command line API part since we check it separatelu in inspector/runtime/command-line-api.js
R=jgruber@chromium.org
Bug: none
Change-Id: Ia12cab10a8e299bb17688c9c5f36e7f712aa70ee
Reviewed-on: https://chromium-review.googlesource.com/595032
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47048}
This call from inspector side is redundant, V8 will clear all breakpoints on removing debug delegate in v8::internal::Debug::Unload method.
In any case for correct support of multiclient we need to clear breakpoints in V8DebuggerAgentImpl::disable method.
R=dgozman@chromium.org
Bug: v8:5510,chromium:652939
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I66f9b97797860bad28884a099928d54ac3560428
Reviewed-on: https://chromium-review.googlesource.com/592281
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47022}
Function-granularity coverage skips functions that are both uncovered
and have an uncovered parent. This optimization needs to be tweaked once
block coverage and incremental collection is in play, as it is possible
to have a function with invocation_count == 0 (i.e. uncovered at
function granularity) that still has relevant block-granularity
coverage.
Bug: v8:6000
Change-Id: I4cc81b8a6935aa58e29d383ed4fa749cbfe69352
Reviewed-on: https://chromium-review.googlesource.com/589508
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46991}
To avoid using debugging context and debugger-script.js on inspector side we can move SetScriptSource call to v8::internal::Debug. Theoretically we can move live edit implementation to native completely but since it will be reimplemented it looks redundant.
R=yangguo@chromium.org,jgruber@chromium.org
Bug: chromium:652939
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Id09492c2d2a93efbde429c9cc1bc181d5fdda19b
Reviewed-on: https://chromium-review.googlesource.com/590736
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46985}
This CL moves us much closer to the point where we can remove debugger-script.js and usage of debugger context from inspector.
There are three main parts left:
- managing breakpoints,
- inspecting stack and scopes (this CL),
- LiveEdit.
In this CL I moved all stack/scope inspection to native. As side effect running debugger and inspector tests are 10-20% faster (it's significant since not all of tests requesting break).
R=yangguo@chromium.org,jgruber@chromium.org
Bug: chromium:652939
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I409396a687e18e9c0554c0c9c35b6e1064627be8
Reviewed-on: https://chromium-review.googlesource.com/580645
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46947}
Note that this also renames the existing "asm_wasm" variant to use the
more appropriate "stress_asm_wasm" name.
R=rmcilroy@chromium.org
BUG=v8:6409
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I1f9550cd03874c678f4583047a4e123a6f090250
Reviewed-on: https://chromium-review.googlesource.com/584879
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46937}
This reverts commit 87aae715df.
Reason for revert: Speculative revert because of ASAN leaks in https://chromium-review.googlesource.com/584488
Original change's description:
> [inspector] support for cases when embedder doesn't call contextDestroyed
>
> Node.js doesn't have good place to call contextDestroyed.
> We need to cleanup everything on our side to allow clients to not call
> contextDestroyed method.
>
> R=dgozman@chromium.org,eostroukhov@google.com
>
> Bug: none
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
> Change-Id: I6bfd4d6039f53eb994a2d20ecbca650744564e29
> Reviewed-on: https://chromium-review.googlesource.com/575519
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46849}
TBR=dgozman@chromium.org,kozyatinskiy@chromium.org,eostroukhov@google.com,eostroukhov@chromium.org
Change-Id: Ic3c2764159f809536670f73ab0cd5ea37317d400
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/584767
Reviewed-by: Michael Hablich <hablich@chromium.org>
Commit-Queue: Michael Hablich <hablich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46865}
This CL adds support for ArrayBuffer and SharedArrayBuffer subtypes for injected
script source. It also adds the byteLength/size to the description of these
objects and for the upcoming "blob" subtype when appropriate.
This is dependent on a DevTools frontend patch to accept these new subtypes:
https://chromium-review.googlesource.com/c/582427/
Bug: chromium:653620
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: If8f612b54e82e6fd2f056545bd521868ba7349fd
Reviewed-on: https://chromium-review.googlesource.com/582233
Commit-Queue: Erik Luo <luoe@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46851}
Node.js doesn't have good place to call contextDestroyed.
We need to cleanup everything on our side to allow clients to not call
contextDestroyed method.
R=dgozman@chromium.org,eostroukhov@google.com
Bug: none
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I6bfd4d6039f53eb994a2d20ecbca650744564e29
Reviewed-on: https://chromium-review.googlesource.com/575519
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46849}
Nop bytecodes are required only for break locations in debugger. Since nop bytecode doesn't change program state we can remove all of them.
There are at least two changes which this CL produce:
- we don't provide break position when we load local variable (still provide when load variable from global),
- we don't provide break position for statements without actual break positions (e.g. "a;") - these expressions should be super rare and user always can set breakpoint before or after this statement.
More details in one pager: https://docs.google.com/a/google.com/document/d/1JXlQpfMa9vRojbE272b6GMBbrfh6m_00135iAUOJEz8/edit?usp=sharing
Bug: v8:6425
Change-Id: I4aee73d497a84f7b5d89caa6dda6d3060567dfda
Reviewed-on: https://chromium-review.googlesource.com/543161
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46742}
Goal of this CL: explicit return from non-async function has position after
return expression as return position (will unblock [1]).
BytecodeArrayBuilder has SetStatementPosition and SetExpressionPosition methods.
If one of these methods is called then next generated bytecode will get passed
position. It's general treatment for most cases.
Unfortunately it doesn't work for Returns:
- debugger requires source positions exactly on kReturn bytecode in stepping
implementation,
- BytecodeGenerator::BuildReturn and BytecodeGenerator::BuildAsyncReturn
generates more then one bytecode and general solution will put return position
on first generated bytecode,
- it's not easy to split BuildReturn function into two parts to allow something
like following in BytecodeGenerator::VisitReturnStatement since generated
bytecodes are actually controlled by execution_control().
..->BuildReturnPrologue();
..->SetReturnPosition(stmt);
..->Return();
In this CL we pass ReturnStatement through ExecutionControl and use it for
position when we emit return bytecode right here.
So this CL only will improve return position for returns inside of non-async
functions, I'll address async functions later.
[1] https://chromium-review.googlesource.com/c/543161/
Change-Id: Iede512c120b00c209990bf50c20e7d23dc0d65db
Reviewed-on: https://chromium-review.googlesource.com/560738
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46687}
Bug: v8:6000
Change-Id: I8c068383300ba869a87f836504c84ea08fcff87e
Reviewed-on: https://chromium-review.googlesource.com/568307
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46675}
This includes several changes. From most to least interesting:
- No longer implement AwaitExpressions using a do-expression.
- Reduces frame-size of async generators by not allocating temporary
variables to hold results of Await epxressions.
- Streamline and reduce generated bytecodes for Await.
- Debugger no longer emits a debug::kCallBreakLocation breakpoint for
the JS-builtin call performed for Await, and instead only emits such
a breakpoint if the operand of Await is actually a call.
- Push fewer parameters to Await* builtins, using the receiver for the
first parameter (possible now that the CallRuntime invocation not
part of the AST).
- Adds a new Await AST node. No new members or anything, but it seemed
palatable to avoid having `if (is_await())` in a number of
VisitSuspend functions.
BUG=v8:5855, v8:5099, v8:4483
R=rmcilroy@chromium.org, kozyatinskiy@chromium.org, yangguo@chromium.orgTBR=bmeurer@chromium.org
Change-Id: I9cd3fda99cd40295c04fdf1aea01b5d83fac6caf
Reviewed-on: https://chromium-review.googlesource.com/558806
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46666}
Removes the --ignition flag which is now on by default. Adds a
--stress-fullcodegen flag which enables running all functions supported
by fullcodegen to be compiled by fullcodegen.
This will enable moving parser internalization later when we are not
stressing fullcodegen or compiling asm.js functions.
BUG=v8:5203, v8:6409, v8:6589
Change-Id: I7fa68016d4e734755434ec0b4e749ef65ffa7f4e
Reviewed-on: https://chromium-review.googlesource.com/565569
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46635}
Otherwise user code can produce an exception and we will crash.
R=jakob@chromium.org
Bug: chromium:736302
Change-Id: I078150909b0348a63e8c375b508e34fc4751b4ab
Reviewed-on: https://chromium-review.googlesource.com/565628
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46566}
This adds a new binary block coverage mode (in addition to the existing count
block coverage), as well as a few transformation passes to reduce the number of
uselessly reported ranges.
Bug: v8:6000
Change-Id: I4fb234ca015990d00aa2f1dccb87f76ba4748994
Reviewed-on: https://chromium-review.googlesource.com/552642
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46463}
This CL adds a few transformations that clean up the set of reported
source ranges. Duplicates, empty, and uncovered ranges are removed, and
nested/consecutive ranges are merged if possible.
BUG=v8:6000
Change-Id: I421ee35ce8292cfe84c1eea4f653762cea5d909d
Reviewed-on: https://chromium-review.googlesource.com/558411
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46450}
When providing scope information (containing the value of local
variables of live stack frames), decode the local variable names of all
functions in a wasm module and store this in the WasmDebugInfo
structure.
Use these names to actually name the reported locals, instead of using
the default names "param#<d>" and "local#<d>". These names are only used
as fallbacks for locals which were not assigned a name.
R=titzer@chromium.org,kozyatinskiy@chromium.org
BUG=v8:6245
Change-Id: Ibf7d30e392248ef5590177cd8b6329239b45e018
Reviewed-on: https://chromium-review.googlesource.com/548495
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46379}
This removes the --turbo flag and solely relies on the filter pattern
provided via --turbo-filter when deciding whether to use TurboFan. Note
that disabling optimization wholesale can still be done with --no-opt,
which should be used in favor of --no-turbo everywhere.
Also note that this contains semantic changes to the TurboFan activation
criteria. We respect the filter pattern more stringently and no longer
activate TurboFan just because the source contains patterns forcing use
of Ignition via {AstNumberingVisitor::DisableFullCodegenAndCrankshaft}.
R=rmcilroy@chromium.org
BUG=v8:6408
Change-Id: I0c855f6a62350eb62283a3431c8cc1baa750950e
Reviewed-on: https://chromium-review.googlesource.com/528121
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46167}
This piggy-backs on top of existing precise and best-effort coverage to expose
block coverage through the inspector protocol.
Coverage collection now implicitly reports block-granularity coverage when
available. A new 'isBlockCoverage' property on Inspector's FunctionCoverage
type specifies the granularity of reported coverage.
For now, only count-based block coverage is supported, but binary block
coverage should follow soon.
Support is still gated behind the --block-coverage flag.
Bug: v8:6000
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I9c4d64e1d2a098e66178b3a68dcee800de0081af
Reviewed-on: https://chromium-review.googlesource.com/532975
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46157}
console.context(name:string) method returns console instance, this console instance fully implements console interface (including fact that any method can be called without console as receiver).
Protocol.Runtime.consoleAPICalled notification contains additional context:string field:
- "anonymous#unique-id" for any method call on unnamed console context,
- "name#unique-id" for any method call on named console context.
console.count and console.timeEnd have context as a scope.
console.clear clear all messages regardless on what context instance it was called.
console calls is ~10% slower with this CL since we need to store and then fetch console_context_id and console_context_name from function object.
We recently (in April) made console calls twice faster so 10% doesn't sound critical and existing of console.log call in hot code is problem by itself.
R=pfeldman@chromium.org
Bug: chromium:728767
Change-Id: I5fc73216fb8b28bfe1e8c2c1b393ebfbe43cd02e
Reviewed-on: https://chromium-review.googlesource.com/522128
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45864}
This CL removes most occurences of "WASM" from outputs and comments in
the code. They are replaced either by "WebAssembly" or (especially in
comments) "wasm". These are the spellings officially proposed on
http://webassembly.org/.
R=ahaas@chromium.org
BUG=v8:6474
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Id39fa5e25591678263745a4eab266db546e65983
Reviewed-on: https://chromium-review.googlesource.com/529085
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45824}
Both Ignition and TurboFan have been enabled by default for a while.
This just disentangles the implication between those two flags and sets
the --ignition individually. They can now be controlled individually.
R=rmcilroy@chromium.org
BUG=v8:6408
Change-Id: I08eca85120160efa5868b5ca36d1613964ed82eb
Reviewed-on: https://chromium-review.googlesource.com/527637
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45800}
The variant in question was intended to test Crankshaft, which is being
deprecated. Note that the variants 'nooptimization' and 'fullcode' still
test configuration where TurboFan is not active.
R=machenbach@chromium.org
BUG=v8:6408
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I587c3eee7ba511dfc270aab66b546d2532bc635f
Reviewed-on: https://chromium-review.googlesource.com/528133
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45785}
BytecodeArrayBreakIterator doesn't iterate through locations in position() order. SkipToPosition is looking for closest break_index to passed one. So we should iterate through all breakable locations in function to get all of them.
R=jgruber@chromium.org
Bug: v8:6469
Change-Id: Ida0b849e9df40458a13e0a0f7af6a00349088228
Reviewed-on: https://chromium-review.googlesource.com/527135
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45765}
... as opposite to a global per-isolate one.
Also streamlined multiple checks into a single acceptsPause() method.
BUG=chromium:590878
Review-Url: https://codereview.chromium.org/2925903002
Cr-Commit-Position: refs/heads/master@{#45749}
Found multiple issues (added TODOs for them):
- isPaused() check is global, so one can resume from another session/context group
without receiving 'paused' notification;
- setBreakpointsActive flag is global affecting all sessions and context groups;
- max async call stack depth is global, and should be per context group.
BUG=chromium:590878
Review-Url: https://codereview.chromium.org/2921373002
Cr-Commit-Position: refs/heads/master@{#45742}
Instead of going through debugger agent, this patch implements
console.assert pause similar to debugger statement and OOM break.
New test uncovered a bug, where pause on exceptions state mix up
between different context groups. Added a TODO to fix it.
BUG=chromium:590878
Review-Url: https://codereview.chromium.org/2916363002
Cr-Commit-Position: refs/heads/master@{#45711}
This gives sessions separate remote objects space and also
makes command line api respect the session it was called from.
BUG=chromium:590878
Review-Url: https://codereview.chromium.org/2916803005
Cr-Commit-Position: refs/heads/master@{#45708}
This patch adds ability to connect multiple sessions to a single context group. This is an experimental feature, which is already supported in test harness.
So far covered runtime domain with tests (and found a bug thanks to the test). More tests to follow in next patches, probably with code adjustments as well.
BUG=chromium:590878
Review-Url: https://codereview.chromium.org/2906153002
Cr-Commit-Position: refs/heads/master@{#45667}
V8 provides ScriptCompiler::CompileFunctionInContext method which takes expression and compile it as anonymous function like (function() .. expression ..). To produce correct locations for stmts inside of this expression V8 compile this function with negative offset. Instead of stmt position blackboxing use function start position which is negative in described case.
Bug: chromium:705963
Change-Id: I86b113198fb59e77b3bbf523c8cd943e22f8a6ca
Reviewed-on: https://chromium-review.googlesource.com/519384
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45637}
In current implementation in expressions like await foo() we have break location right after foo call and before actual await.
And we additionally have a lot of other statement locations because of do scope.
Let's move async debugging closer to sync debugging and introduce only one break location for await - before awaited function call.
Bug: v8:6425,v8:6162
Change-Id: I7568767856022c49101e7f3b7e39a2e401d21644
Reviewed-on: https://chromium-review.googlesource.com/514046
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45625}
This CL improves break locations for expressions like 'var a = <expr>'. Without CL we use <expr> position as break location for initialization statement, with this CL we use position of first character after '=' as position.
Benefits (see test for details):
- only one break in expressions which includes mix of property lookup and calls, e.g. var p = Promise.resolve().then(x => x * 2),
- removed redundant break location for expressions like: let { x, y } = { x: 1, y: 2}.
TBR=dgozman@chromium.org,rmcilroy@chromium.org,machenbach@chromium.org,marja@chromium.org,kozyatinskiy@chromium.org,devtools-reviews@chromium.org,v8-reviews@googlegroups.com
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:5909
Change-Id: Ie84fa79afeed09e28cf8478ba610a0cfbfdfc294
Reviewed-on: https://chromium-review.googlesource.com/518116
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45598}
All APIs that can throw exceptions should return Maybe<> values
BUG=none
R=neis@chromium.org,gsathya@chromium.org
Change-Id: I6a6e5888cd71257bb02bdcfcc587c909d0c1d8f4
Reviewed-on: https://chromium-review.googlesource.com/517785
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45557}
This reverts commit 7a9cc70492.
Reason for revert: Changes layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/15882
This is about:
inspector/sources/debugger/source-frame-inline-breakpoint-decorations.html
Original change's description:
> [inspector] moved var initialization break location before init expression
>
> This CL improves break locations for expressions like 'var a = <expr>'. Without CL we use <expr> position as break location for initialization statement, with this CL we use position of first character after '=' as position.
> Benefits (see test for details):
> - only one break in expressions which includes mix of property lookup and calls, e.g. var p = Promise.resolve().then(x => x * 2),
> - removed redundant break location for expressions like: let { x, y } = { x: 1, y: 2}.
>
> Bug: v8:5909
> Change-Id: I039d911903a2826c9859710a63ab0462c992e11b
> Reviewed-on: https://chromium-review.googlesource.com/513926
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#45530}
TBR=dgozman@chromium.org,marja@chromium.org,kozyatinskiy@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:5909
Change-Id: Ibf84401e8050d3c84db219d983de2c6bba0f697f
Reviewed-on: https://chromium-review.googlesource.com/518102
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45547}
This CL improves break locations for expressions like 'var a = <expr>'. Without CL we use <expr> position as break location for initialization statement, with this CL we use position of first character after '=' as position.
Benefits (see test for details):
- only one break in expressions which includes mix of property lookup and calls, e.g. var p = Promise.resolve().then(x => x * 2),
- removed redundant break location for expressions like: let { x, y } = { x: 1, y: 2}.
Bug: v8:5909
Change-Id: I039d911903a2826c9859710a63ab0462c992e11b
Reviewed-on: https://chromium-review.googlesource.com/513926
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45530}
In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume.
The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change.
I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit.
Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish.
BUG=v8:6368
Review-Url: https://codereview.chromium.org/2898163002
Cr-Commit-Position: refs/heads/master@{#45515}
There are two break locations at the same source location by desugaring:
- call iterator.next,
- before variable assignment.
Additionally location for for..of loops is moved from before "of" to before each variable expression.
We should not report first implicit call to avoid user confusion. User still able to go into .next function with both scenarios:
- when this call is reached by stepOver or stepInto from previous line,
- when this call is reached because of breakpoint at current line.
BUG=v8:6425
R=dgozman@chromium.org,jgruber@chromium.org
Review-Url: https://codereview.chromium.org/2893313002
Cr-Commit-Position: refs/heads/master@{#45509}
All targets (at least on sanitizer builds) unconditionally depend
on //build/config/sanitizers:deps.
It is necessary for bug 593874 that all targets now also depend
on //buildtools/third_party/libc++:libcxx_proxy. This requires
adding a new "global dependency": //build/config:exe_and_shlib_deps.
This CL updates references to sanitizers:deps to instead refer to
//build/config:exe_and_shlib_deps.
BUG=chromium:723069
R=bradnelson@chromium.org
Review-Url: https://codereview.chromium.org/2894013003
Cr-Commit-Position: refs/heads/master@{#45435}
This refactoring makes it easier to write advanced tests and
gives full control over what's happening to the test code.
It also forces description for every test.
BUG=none
Review-Url: https://codereview.chromium.org/2891213002
Cr-Commit-Position: refs/heads/master@{#45412}
- moved all extensions to inspector_test.cc;
- properly supported multiple context groups and sessions;
- better isolation between components;
- better infrastructure in protocol-test.
BUG=chromium:590878
Review-Url: https://codereview.chromium.org/2890463004
Cr-Commit-Position: refs/heads/master@{#45409}
Split BytecodeGenerator::VisitSuspend into two pieces, one for
building the suspension code and one for resumption (these
are split into separate Build methods for convenience).
Each gets its own RegisterAllocationScope, which allows us to
reduce the register file size of the empty generator by 1.
For consistency, rename VisitGeneratorPrologue() to
BuildGeneratorPrologue() to match the names of the two
newly-created methods.
This relands the patch originally committed in
98927ea51b, as the test failure
due to that change was a code flushing bug. Code flushing was
disabled in de4a4095cf.
R=rmcilroy@chromium.org
Bug: v8:6379
Change-Id: Ifb4deafea99693c0a4e8646cf4e9884c7374cfc6
Reviewed-on: https://chromium-review.googlesource.com/508814
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45406}
This brings clear separation to tasks vs isolate management.
BUG=none
Review-Url: https://codereview.chromium.org/2885253002
Cr-Commit-Position: refs/heads/master@{#45355}
By default we just break when we first time reach passed location, with current - we'll break at passed location only when it happens within the same stack frame.
BUG=v8:6397
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2879923003
Cr-Commit-Position: refs/heads/master@{#45354}
This will make it easier to create more connections/context groups.
BUG=none
Review-Url: https://codereview.chromium.org/2886903003
Cr-Commit-Position: refs/heads/master@{#45352}
This reverts commit 98927ea51b.
Reason for revert: Breaks Mac GC Stress bot.
https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Mac%20GC%20Stress/builds/13299/steps/Mjsunit/logs/for-await-of
Original change's description:
> [ignition] Be smarter about register allocation in VisitSuspend
>
> Split BytecodeGenerator::VisitSuspend into two pieces, one for
> building the suspension code and one for resumption (these
> are split into separate Build methods for convenience).
> Each gets its own RegisterAllocationScope, which allows us to
> reduce the register file size of the empty generator by 1.
>
> For consistency, rename VisitGeneratorPrologue() to
> BuildGeneratorPrologue() to match the names of the two
> newly-created methods.
>
> Bug: v8:6379
> Change-Id: I08a617a44f99706cfff09bf86fb0a25a9cd6e032
> Reviewed-on: https://chromium-review.googlesource.com/503593
> Commit-Queue: Adam Klein <adamk@chromium.org>
> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#45318}
TBR=rmcilroy@chromium.org,adamk@chromium.org,neis@chromium.org,kozyatinskiy@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Bug: v8:6379
Change-Id: I787fc3811c4f33a8021cf9170d43a74ed9b55d1c
Reviewed-on: https://chromium-review.googlesource.com/506548
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45319}
Split BytecodeGenerator::VisitSuspend into two pieces, one for
building the suspension code and one for resumption (these
are split into separate Build methods for convenience).
Each gets its own RegisterAllocationScope, which allows us to
reduce the register file size of the empty generator by 1.
For consistency, rename VisitGeneratorPrologue() to
BuildGeneratorPrologue() to match the names of the two
newly-created methods.
Bug: v8:6379
Change-Id: I08a617a44f99706cfff09bf86fb0a25a9cd6e032
Reviewed-on: https://chromium-review.googlesource.com/503593
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45318}
Creation stack trace points to the place where callback was actually chained, scheduled points where parent promise was resolved.
For async tasks without creation stack (e.g. setTimeout) we continue to use scheduled as creation since usually they are the same.
BUG=v8:6189
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2868493002
Cr-Original-Commit-Position: refs/heads/master@{#45198}
Committed: e118462f18
Review-Url: https://codereview.chromium.org/2868493002
Cr-Commit-Position: refs/heads/master@{#45266}
Reason for revert:
CHECK is too strict.
Original issue's description:
> [inspector] use creation stack trace as parent for async call chains
>
> Creation stack trace points to the place where callback was actually chained, scheduled points where parent promise was resolved.
> For async tasks without creation stack (e.g. setTimeout) we continue to use scheduled as creation since usually they are the same.
>
> BUG=v8:6189
> R=dgozman@chromium.org
>
> Review-Url: https://codereview.chromium.org/2868493002
> Cr-Commit-Position: refs/heads/master@{#45198}
> Committed: e118462f18TBR=dgozman@chromium.org,alexclarke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:6189
Review-Url: https://codereview.chromium.org/2868423004
Cr-Commit-Position: refs/heads/master@{#45242}
Creation stack trace points to the place where callback was actually chained, scheduled points where parent promise was resolved.
For async tasks without creation stack (e.g. setTimeout) we continue to use scheduled as creation since usually they are the same.
BUG=v8:6189
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2868493002
Cr-Commit-Position: refs/heads/master@{#45198}
That's cleaner than having every target depending on v8 include icu
itself.
BUG=none
R=machenbach@chromium.org
Change-Id: Icaa9e8670718664041a6efe2622366c89b733f81
Reviewed-on: https://chromium-review.googlesource.com/500127
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45196}
This CL prevents problems with library libicui18n.so during execution
inspector tests when component is defined as shared library.
TEST=inspector/*
BUG=
Review-Url: https://codereview.chromium.org/2863383003
Cr-Commit-Position: refs/heads/master@{#45176}
The collection builtins (Map, Set, WeakMap, WeakSet) are still written
in JavaScript and make heavy use of %_ClassOf, which is kind of
expensive compared to a simple instance type check. Change that to use
simple instance type checks instead.
R=jarin@chromium.org
BUG=v8:6261,v8:6278,v8:6344
Review-Url: https://codereview.chromium.org/2814773005
Cr-Original-Commit-Position: refs/heads/master@{#45106}
Committed: 28170099fd
Review-Url: https://codereview.chromium.org/2814773005
Cr-Commit-Position: refs/heads/master@{#45124}
Removes the do-expression wrapping, modifies BytecodeGenerator change
to enter a class literal's block scope if needed.
This does not solve the actual bug in v8:6322, but helps mitigate it in
simple cases. The bug is caused by BytecodeGenerator not allocating a
large enough array of context registers to hold its entire stack,
allowing non-context registers to be overwritten during PushContext and
PopContext bytecodes.
Nevertheless, I like the idea of not depending on do-expressions when
possible, so I think it's worth doing anyways.
BUG=v8:6322
R=rmcilroy@chromium.org, marja@chromium.org, littledan@chromium.org
Change-Id: I82b7569db2a0eead1694bd04765fc4456c2f1a0a
Reviewed-on: https://chromium-review.googlesource.com/491074
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45110}
The collection builtins (Map, Set, WeakMap, WeakSet) are still written
in JavaScript and make heavy use of %_ClassOf, which is kind of
expensive compared to a simple instance type check. Change that to use
simple instance type checks instead.
R=jarin@chromium.org
BUG=v8:6261,v8:6278,v8:6344
Review-Url: https://codereview.chromium.org/2814773005
Cr-Commit-Position: refs/heads/master@{#45106}
getPossibleBreakpoints implementation can enforce function compilation which potentially can produce syntax error, we need to have a context to correctly report this error.
BUG=chromium:715334
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2851853002
Cr-Commit-Position: refs/heads/master@{#45003}
- we should always set creation async stack if it's available regardless existing of current parent async stack,
- we should cleanup parent link iff there is no creation and schedule async stack for parent.
Let's consider example: Promise.resolve().then(x => x).then(x => x), there is three promises which will call following instrumentation:
1) created #1 (Promise.resolve()) - collected stack #1
2) scheduled #1 - collected stack #2
3) created #2 with #1 as parent (first .then) - collected stack #3
4) created #3 with #2 as parent (first .then) - collected stack #4
5) started #2 - use stack #2 as scheduled
6) scheduled #2 - collected stack #6
7) finished #2
8) started #3 - use stack #6 as scheduled
9) scheduled #3 - collected stack #7
10) finished #3
If we collect stacks between step 4 and 5, it's possible to collect scheduled stack #2 but still have creation stack for #2 - stack #3 - so we always need to add creation event if scheduled is collected.
If we collect stacks between created and scheduled we should not remove parent link even if parent was not scheduled yet.
BUG=v8:6189
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2844753002
Cr-Commit-Position: refs/heads/master@{#44990}
1. Replaces --crankshaft with --opt in tests.
2. Also fixes presubmit to check for --opt flag when
assertOptimized is used.
3. Updates testrunner/local/variants.py and
v8_foozie.py to use --opt flag.
This would mean, nooptimize variant means there are
no optimizations. Not even with %OptimizeFunctionOnNextCall.
Bug:v8:6325
Change-Id: I638e743d0773a6729c6b9749e2ca1e2537f12ce6
Reviewed-on: https://chromium-review.googlesource.com/490206
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44985}
.. replace all of them with prepared global object template.
+ bonus: wrap inspector related methods with inspector namespace.
BUG=none
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2832723004
Cr-Commit-Position: refs/heads/master@{#44785}
With recent CLs we always store maximum N async stack traces and when we reach limit we drop half of them.
Current promise collected event requires creating weak handle:
- it takes time,
- it consumes memory.
Since async task id distribution for promises is uniform (each new promise has last_async_task_id + 1 as an id) our hash map is good enough to handle any amount of async task ids, following time of executing 1 000 000 000 of lookups:
- for empty hash map: 1.45 seconds,
- for hash map with one entry: 14.95 seconds
- 1024 entries: 15.03 seconds
- 1024 * 1024 entries: 14.82 seconds
- 1024 * 1024 * 1024: 17.9 seconds
BUG=v8:6189
R=dgozman@chromium.org,yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2819423005
Cr-Commit-Position: refs/heads/master@{#44750}
What will we get:
- console would be included into snapshot and allow us to reduce time that we spent in contextCreated function (~5 times faster),
- it allows us to make further small improvement of console methods, e.g. we can implement super quick return from console.assert if first argument is true,
- console calls are ~ 15% faster.
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng
BUG=v8:6175
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2785293002
Cr-Original-Original-Original-Commit-Position: refs/heads/master@{#44353}
Committed: 55905f85d6
Review-Url: https://codereview.chromium.org/2785293002
Cr-Original-Original-Commit-Position: refs/heads/master@{#44355}
Committed: cc74ea0bc4
Review-Url: https://codereview.chromium.org/2785293002
Cr-Original-Commit-Position: refs/heads/master@{#44416}
Committed: f5dc738cda
Review-Url: https://codereview.chromium.org/2785293002
Cr-Commit-Position: refs/heads/master@{#44702}
- separated V8StackTraceImpl and AsyncStackTrace,
- V8Debugger owns all AsyncStackTrace and cleanup half of them when limit is reached (first created - first cleaned),
- V8StackTraceImpl, AsyncStackTrace and async-task-related tables in V8Debugger have weak reference to other async stack traces.
- async tasks are cleared with related async stacks.
BUG=v8:6189
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2816043006
Cr-Original-Commit-Position: refs/heads/master@{#44670}
Committed: 1bca73bc83
Review-Url: https://codereview.chromium.org/2816043006
Cr-Commit-Position: refs/heads/master@{#44694}
Reason for revert:
Speculative revert. Seems to block the roll:
https://codereview.chromium.org/2822983004/
Might require changing a browser test first?
Original issue's description:
> [inspector] avoid cloning of async call chains
>
> - separated V8StackTraceImpl and AsyncStackTrace,
> - V8Debugger owns all AsyncStackTrace and cleanup half of them when limit is reached (first created - first cleaned),
> - V8StackTraceImpl, AsyncStackTrace and async-task-related tables in V8Debugger have weak reference to other async stack traces.
> - async tasks are cleared with related async stacks.
>
> BUG=v8:6189
> R=dgozman@chromium.org
>
> Review-Url: https://codereview.chromium.org/2816043006
> Cr-Commit-Position: refs/heads/master@{#44670}
> Committed: 1bca73bc83TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6189
Review-Url: https://codereview.chromium.org/2825713002
Cr-Commit-Position: refs/heads/master@{#44678}
- separated V8StackTraceImpl and AsyncStackTrace,
- V8Debugger owns all AsyncStackTrace and cleanup half of them when limit is reached (first created - first cleaned),
- V8StackTraceImpl, AsyncStackTrace and async-task-related tables in V8Debugger have weak reference to other async stack traces.
- async tasks are cleared with related async stacks.
BUG=v8:6189
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2816043006
Cr-Commit-Position: refs/heads/master@{#44670}
This CL implements the proposed change to show information about
WebAssembly values and call frames via the inspector interface.
Each interpreted WebAssembly frame will have two scopes: A global scope
showing information about the memory (to be extended for globals), and
a local scope showing information about parameters, local variables, and
stack values.
Names of local variables will be added later.
R=ahaas@chromium.org, yangguo@chromium.org
BUG=v8:6245,v8:5822
Change-Id: I0a35fddd0a353933c86adf62083233b08098a2c7
Reviewed-on: https://chromium-review.googlesource.com/474865
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44633}
The format of the name section changed recently. It now contains
subsections of different type (currently for function names or local
variable names).
This CL changes our internal wasm module builders (in JS and C++) to
emit this new format, and changes the decoder to understand it.
We currently only parse the function name section, and ignore names of
local variables. I will later extend this to parse local variable names
when needed for debugging.
R=ahaas@chromium.org, rossberg@chromium.org
BUG=v8:6222
Change-Id: I2627160c25c9209a3f09abe0b88941ec48b24434
Reviewed-on: https://chromium-review.googlesource.com/470247
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Rossberg <rossberg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44492}
What will we get:
- console would be included into snapshot and allow us to reduce time that we spent in contextCreated function (~5 times faster),
- it allows us to make further small improvement of console methods, e.g. we can implement super quick return from console.assert if first argument is true,
- console calls are ~ 15% faster.
BUG=v8:6175
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2785293002
Cr-Original-Original-Commit-Position: refs/heads/master@{#44353}
Committed: 55905f85d6
Review-Url: https://codereview.chromium.org/2785293002
Cr-Original-Commit-Position: refs/heads/master@{#44355}
Committed: cc74ea0bc4
Review-Url: https://codereview.chromium.org/2785293002
Cr-Commit-Position: refs/heads/master@{#44416}
Reason for revert:
http://crbug.com/v8/6198
Original issue's description:
> [inspector] move console to builtins
>
> What will we get:
> - console would be included into snapshot and allow us to reduce time that we spent in contextCreated function (~5 times faster),
> - it allows us to make further small improvement of console methods, e.g. we can implement super quick return from console.assert if first argument is true,
> - console calls are ~ 15% faster.
>
> BUG=v8:6175
> R=dgozman@chromium.org
>
> Review-Url: https://codereview.chromium.org/2785293002
> Cr-Original-Commit-Position: refs/heads/master@{#44353}
> Committed: 55905f85d6
> Review-Url: https://codereview.chromium.org/2785293002
> Cr-Commit-Position: refs/heads/master@{#44355}
> Committed: cc74ea0bc4TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6175
Review-Url: https://codereview.chromium.org/2790343002
Cr-Commit-Position: refs/heads/master@{#44358}
What will we get:
- console would be included into snapshot and allow us to reduce time that we spent in contextCreated function (~5 times faster),
- it allows us to make further small improvement of console methods, e.g. we can implement super quick return from console.assert if first argument is true,
- console calls are ~ 15% faster.
BUG=v8:6175
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2785293002
Cr-Original-Commit-Position: refs/heads/master@{#44353}
Committed: 55905f85d6
Review-Url: https://codereview.chromium.org/2785293002
Cr-Commit-Position: refs/heads/master@{#44355}
Reason for revert:
console.toString() should return "[object Object]"
Original issue's description:
> [inspector] move console to builtins
>
> What will we get:
> - console would be included into snapshot and allow us to reduce time that we spent in contextCreated function (~5 times faster),
> - it allows us to make further small improvement of console methods, e.g. we can implement super quick return from console.assert if first argument is true,
> - console calls are ~ 15% faster.
>
> BUG=v8:6175
> R=dgozman@chromium.org
>
> Review-Url: https://codereview.chromium.org/2785293002
> Cr-Commit-Position: refs/heads/master@{#44353}
> Committed: 55905f85d6TBR=dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6175
Review-Url: https://codereview.chromium.org/2795003003
Cr-Commit-Position: refs/heads/master@{#44354}
What will we get:
- console would be included into snapshot and allow us to reduce time that we spent in contextCreated function (~5 times faster),
- it allows us to make further small improvement of console methods, e.g. we can implement super quick return from console.assert if first argument is true,
- console calls are ~ 15% faster.
BUG=v8:6175
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2785293002
Cr-Commit-Position: refs/heads/master@{#44353}
This adds test coverage for the source position tracking of function
table calls in asm.js and fixes the discovered issues. It also fixes
function start positions (used by errors thrown at stack checks).
R=clemensh@chromium.org
TEST=mjsunit/wasm/asm-wasm-stack
BUG=v8:6127,v8:6166
Change-Id: Id6ab6dc72bcedb0d838eed315e2a05fbc59039f4
Reviewed-on: https://chromium-review.googlesource.com/465949
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44348}
With this CL we don't need to store reference to InspectedContext inside of JavaScript console object and able to get all required information from callback data.
It allows us to implement console methods without taking in account how and where we create and store these methods:
- later we can move console object implementation to builtins..
- ..and install command line API methods smarter.
BUG=chromium:588893
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2784713002
Cr-Original-Original-Commit-Position: refs/heads/master@{#44212}
Committed: 908cd38123
Review-Url: https://codereview.chromium.org/2784713002
Cr-Original-Commit-Position: refs/heads/master@{#44238}
Committed: 88f71126a5
Review-Url: https://codereview.chromium.org/2784713002
Cr-Commit-Position: refs/heads/master@{#44251}
Reason for revert:
One more failed layout test.
Original issue's description:
> [inspector] console get all information from inspector when needed
>
> With this CL we don't need to store reference to InspectedContext inside of JavaScript console object and able to get all required information from callback data.
> It allows us to implement console methods without taking in account how and where we create and store these methods:
> - later we can move console object implementation to builtins..
> - ..and install command line API methods smarter.
>
> BUG=chromium:588893
> R=dgozman@chromium.org
>
> Review-Url: https://codereview.chromium.org/2784713002
> Cr-Original-Commit-Position: refs/heads/master@{#44212}
> Committed: 908cd38123
> Review-Url: https://codereview.chromium.org/2784713002
> Cr-Commit-Position: refs/heads/master@{#44238}
> Committed: 88f71126a5TBR=dgozman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:588893
Review-Url: https://codereview.chromium.org/2778743007
Cr-Commit-Position: refs/heads/master@{#44246}
This flushed out a number of bugs.
To reproduce, remove the inspector.status file entries, build with GN,
and run `tools/run-tests.py --gn --exhaustive-variants inspector`.
R=mstarzinger@chromium.org
BUG=v8:6165,v8:6166,v8:6167,v8:6168,v8:6170,v8:6171
Review-Url: https://codereview.chromium.org/2777413005
Cr-Commit-Position: refs/heads/master@{#44242}
With this CL we don't need to store reference to InspectedContext inside of JavaScript console object and able to get all required information from callback data.
It allows us to implement console methods without taking in account how and where we create and store these methods:
- later we can move console object implementation to builtins..
- ..and install command line API methods smarter.
BUG=chromium:588893
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2784713002
Cr-Original-Commit-Position: refs/heads/master@{#44212}
Committed: 908cd38123
Review-Url: https://codereview.chromium.org/2784713002
Cr-Commit-Position: refs/heads/master@{#44238}
Reason for revert:
Breaks layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/14569
Original issue's description:
> [inspector] console get all information from inspector when needed
>
> With this CL we don't need to store reference to InspectedContext inside of JavaScript console object and able to get all required information from callback data.
> It allows us to implement console methods without taking in account how and where we create and store these methods:
> - later we can move console object implementation to builtins..
> - ..and install command line API methods smarter.
>
> BUG=chromium:588893
> R=dgozman@chromium.org
>
> Review-Url: https://codereview.chromium.org/2784713002
> Cr-Commit-Position: refs/heads/master@{#44212}
> Committed: 908cd38123TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:588893
Review-Url: https://codereview.chromium.org/2784603003
Cr-Commit-Position: refs/heads/master@{#44217}
With this CL we don't need to store reference to InspectedContext inside of JavaScript console object and able to get all required information from callback data.
It allows us to implement console methods without taking in account how and where we create and store these methods:
- later we can move console object implementation to builtins..
- ..and install command line API methods smarter.
BUG=chromium:588893
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2784713002
Cr-Commit-Position: refs/heads/master@{#44212}
- added InspectorTest.setupInjectedScriptEnvironment method which mutates current context,
- clear prototype of InjectedScript function and domAttributesWithObservableSideEffectOnGet.
Second point increases chances that injected-script-source would be successfully compiled.
BUG=chromium:693338
R=dgozman@chromium.org,luoe@chromium.org
Review-Url: https://codereview.chromium.org/2770823003
Cr-Commit-Position: refs/heads/master@{#44081}
With precise binary code coverage, the reported count is either 0 or 1.
We only report 1 the first time we collect coverage data after the
function has been executed.
Since we do not care about the accurate execution count, we can optimize
the function once it has been executed once.
Also change best effort coverage to be implicitly binary.
R=caseq@chromium.org, jgruber@chromium.org, pfeldman@chromium.org
BUG=v8:5808
Review-Url: https://codereview.chromium.org/2766573003
Cr-Commit-Position: refs/heads/master@{#44074}
With flag we can debug injected-script-source in inspector-test or from DevTools frontend as regular user code. We need this when working on new features or debugging issues, it's for internal purpose only and doesn't provide any benefits for end users.
Flag: --expose-inspector-scripts
BUG=none
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2767873002
Cr-Commit-Position: refs/heads/master@{#44039}
Indisputable profit:
- correct break location in next task (see tests),
- stepOver with async await never lands in random code (see related test and issue),
- inspector doesn't store current stepping state in debugger agent and completely trust V8 - step to new inspector-V8 design (I will finish design doc soon).
- willExecuteScript and didExecuteScript instrumentation could be removed from code base - reduce probability of future errors.
- finally - less code,
- stepping implementation in V8 makes another step to follow our stepping strategy (stepOut should do stepInto and break when exit current frame) (another one one page design doc based on @aandrey comment is coming),
- knowledge about existing of context groups is still inspector-only.
Disputable part is related to super rare scenario when in single isolate we have more then one context group id with enabled debugger agent:
- if one agent request break in own context (stepping, pause, e.t.c.) then we ignore all breaks in another agent. From one hand it looks like good: user clicks stepInto and they don't expect that execution could be paused by another instance of DevTools in unobservable from current DevTools way (second DevTools will get paused notification and run nested message loop). From another hand we shouldn't ignore breakpoints or debugger statement never. In general, I think that proposed behavior is rathe feature then issue.
- and disadvantage, on attempt to break in non-target context group id we just call StepOut until reach target context group id, step out call could deoptimize code in non related to current debugger agent context. But break could happens only in case of debugger stmt or breakpoint - sound like minor issue. Ignoring break on exception sounds like real issue but by module of rareness of this case I think we can ignore this.
Implementation details:
- when debugger agent request break for any reason it passes target context group id to V8Debugger - last agent requesting break is preferred.
- when V8Debugger gets BreakProgramRequested notification from V8, it checks current context group id against target context group id, if they match then just process break as usual otherwise makes StepOut action,
- debug.cc at the end of microtask if last_scheduled_action is StepOut, schedules StepIn and will break on first instruction in next task.
BUG=chromium:654022
R=dgozman@chromium.org,yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2748503002
Cr-Commit-Position: refs/heads/master@{#44034}
Proposed behaviour:
- StepNext at return position go into next function call (no changes with current behavior, but implemented in v8::Debug instead of hack on inspector side);
- StepOut at return position go into next non-current function call.
We need this to have better stepping in cases with native functions, blackboxed functions and/or different embedder calls (e.g. event listeners).
New behavior could be illustrated with two examples (for more see stepping-with-natives-and-frameworks test):
- let's assume that we've blackboxed callAll function, this function just takes its arguments and call one after another:
var foo = () => 1;
callAll(foo, foo, () => 2);
If we break inside of first call of function foo. Then on..
..StepNext - we're able to reach second call of function foo,
..StepOut - we're able to reach () => 2 call.
- let's consider case with native function:
[1,2,3].map(x => x * 2)
If we break inside of first callback call, then with StepNext we can iterate through all calls of callback, with StepOut we go to next statement after .map call.
Implementation details:
- when we request break we schedule step-in function call for any step action at return position and for step-in at any position,
- when we request StepOut at return position - we mark current function as needed-to-be-ignored inside of PrepareStepIn(function) call,
- when we request StepOut at not return position - we set break at return position and ask debugger to just repeat last step action on next stepping-related break.
Design doc: https://docs.google.com/document/d/1ihXHOIhP_q-fJCA0e2EiXz_Zr3B08KMjaPifcaqZ60Q/edit
BUG=v8:6118,chromium:583193
R=dgozman@chromium.org,yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2758483002
Cr-Commit-Position: refs/heads/master@{#44028}
We used to clear invocation counts when enabling precise coverage.
This is not necessary, and we could continue to use the existing
invocation counts on the heap. The old behavior can be achieved
by explicitly resetting the counts by polling coverage data.
R=jgruber@chromium.org,caseq@chromium.org
BUG=v8:5808
Review-Url: https://codereview.chromium.org/2768453002
Cr-Commit-Position: refs/heads/master@{#43964}
Default to the chromium-internal build config (instead of the more
permissive no_chromium_code config).
BUG=v8:5878
Review-Url: https://codereview.chromium.org/2758563002
Cr-Commit-Position: refs/heads/master@{#43909}
Reason for revert:
Still flaky
Original issue's description:
> Collect type profile for DevTools
>
> Collect type information for JavaScript variables and display it
> in Chrome DevTools.
> Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
>
> When debugging JavaScript, it’s helpful to know the type of
> a variable, parameter, and return values. JavaScript is
> dynamically typed, and for complex
> source code it’s often hard to infer types. With type profiling, we
> can provide type information to JavaScript developers.
>
> This CL is a proof of concept. It collects type profile for
> assignments and simply prints the types to stdout.
>
> The output looks something like this:
>
> #my_var1
> #Object
> #number
> #string
> #number
> #undefined
> #string
> #Object
> #Object
>
>
> We use an extra slot in the feedback vector of assignments to
> carry the list of types for that assignment. The extra slot is
> only added when the flag --type-profile is given.
>
>
> Missing work:
> * Collect data for parameters and return values (currently only assignments).
> * Remove duplicates from the list of collected types and use a common base class.
> * Add line numbers or source position instead of the variable name.
>
>
>
> BUG=v8:5935
>
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Original-Original-Original-Commit-Position: refs/heads/master@{#43791}
> Committed: 0332bebde9
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Original-Original-Commit-Position: refs/heads/master@{#43804}
> Committed: 6cf880f4b8
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Original-Commit-Position: refs/heads/master@{#43846}
> Committed: 5c32287390
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Commit-Position: refs/heads/master@{#43849}
> Committed: 18c35e4958TBR=yangguo@chromium.org,mvstanton@chromium.org,rmcilroy@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2745413006
Cr-Commit-Position: refs/heads/master@{#43852}
Collect type information for JavaScript variables and display it
in Chrome DevTools.
Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
When debugging JavaScript, it’s helpful to know the type of
a variable, parameter, and return values. JavaScript is
dynamically typed, and for complex
source code it’s often hard to infer types. With type profiling, we
can provide type information to JavaScript developers.
This CL is a proof of concept. It collects type profile for
assignments and simply prints the types to stdout.
The output looks something like this:
#my_var1
#Object
#number
#string
#number
#undefined
#string
#Object
#Object
We use an extra slot in the feedback vector of assignments to
carry the list of types for that assignment. The extra slot is
only added when the flag --type-profile is given.
Missing work:
* Collect data for parameters and return values (currently only assignments).
* Remove duplicates from the list of collected types and use a common base class.
* Add line numbers or source position instead of the variable name.
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2707873002
Cr-Original-Original-Original-Commit-Position: refs/heads/master@{#43791}
Committed: 0332bebde9
Review-Url: https://codereview.chromium.org/2707873002
Cr-Original-Original-Commit-Position: refs/heads/master@{#43804}
Committed: 6cf880f4b8
Review-Url: https://codereview.chromium.org/2707873002
Cr-Original-Commit-Position: refs/heads/master@{#43846}
Committed: 5c32287390
Review-Url: https://codereview.chromium.org/2707873002
Cr-Commit-Position: refs/heads/master@{#43849}
Reason for revert:
Flaky under stress. Fix first.
Original issue's description:
> Collect type profile for DevTools
>
> Collect type information for JavaScript variables and display it
> in Chrome DevTools.
> Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
>
> When debugging JavaScript, it’s helpful to know the type of
> a variable, parameter, and return values. JavaScript is
> dynamically typed, and for complex
> source code it’s often hard to infer types. With type profiling, we
> can provide type information to JavaScript developers.
>
> This CL is a proof of concept. It collects type profile for
> assignments and simply prints the types to stdout.
>
> The output looks something like this:
>
> #my_var1
> #Object
> #number
> #string
> #number
> #undefined
> #string
> #Object
> #Object
>
>
> We use an extra slot in the feedback vector of assignments to
> carry the list of types for that assignment. The extra slot is
> only added when the flag --type-profile is given.
>
>
> Missing work:
> * Collect data for parameters and return values (currently only assignments).
> * Remove duplicates from the list of collected types and use a common base class.
> * Add line numbers or source position instead of the variable name.
>
>
>
> BUG=v8:5935
>
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Original-Original-Commit-Position: refs/heads/master@{#43791}
> Committed: 0332bebde9
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Original-Commit-Position: refs/heads/master@{#43804}
> Committed: 6cf880f4b8
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Commit-Position: refs/heads/master@{#43846}
> Committed: 5c32287390TBR=yangguo@chromium.org,mvstanton@chromium.org,rmcilroy@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2747383004
Cr-Commit-Position: refs/heads/master@{#43847}
Collect type information for JavaScript variables and display it
in Chrome DevTools.
Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
When debugging JavaScript, it’s helpful to know the type of
a variable, parameter, and return values. JavaScript is
dynamically typed, and for complex
source code it’s often hard to infer types. With type profiling, we
can provide type information to JavaScript developers.
This CL is a proof of concept. It collects type profile for
assignments and simply prints the types to stdout.
The output looks something like this:
#my_var1
#Object
#number
#string
#number
#undefined
#string
#Object
#Object
We use an extra slot in the feedback vector of assignments to
carry the list of types for that assignment. The extra slot is
only added when the flag --type-profile is given.
Missing work:
* Collect data for parameters and return values (currently only assignments).
* Remove duplicates from the list of collected types and use a common base class.
* Add line numbers or source position instead of the variable name.
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2707873002
Cr-Original-Original-Commit-Position: refs/heads/master@{#43791}
Committed: 0332bebde9
Review-Url: https://codereview.chromium.org/2707873002
Cr-Original-Commit-Position: refs/heads/master@{#43804}
Committed: 6cf880f4b8
Review-Url: https://codereview.chromium.org/2707873002
Cr-Commit-Position: refs/heads/master@{#43846}
Reason for revert:
gcc bot is now flaky https://build.chromium.org/p/client.v8/builders/V8%20Linux%20gcc%204.8/builds/11863
Original issue's description:
> Collect type profile for DevTools
>
> Collect type information for JavaScript variables and display it
> in Chrome DevTools.
> Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
>
> When debugging JavaScript, it’s helpful to know the type of
> a variable, parameter, and return values. JavaScript is
> dynamically typed, and for complex
> source code it’s often hard to infer types. With type profiling, we
> can provide type information to JavaScript developers.
>
> This CL is a proof of concept. It collects type profile for
> assignments and simply prints the types to stdout.
>
> The output looks something like this:
>
> #my_var1
> #Object
> #number
> #string
> #number
> #undefined
> #string
> #Object
> #Object
>
>
> We use an extra slot in the feedback vector of assignments to
> carry the list of types for that assignment. The extra slot is
> only added when the flag --type-profile is given.
>
>
> Missing work:
> * Collect data for parameters and return values (currently only assignments).
> * Remove duplicates from the list of collected types and use a common base class.
> * Add line numbers or source position instead of the variable name.
>
>
>
> BUG=v8:5935
>
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Original-Commit-Position: refs/heads/master@{#43791}
> Committed: 0332bebde9
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Commit-Position: refs/heads/master@{#43804}
> Committed: 6cf880f4b8TBR=yangguo@chromium.org,mvstanton@chromium.org,rmcilroy@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2754573002
Cr-Commit-Position: refs/heads/master@{#43805}
Collect type information for JavaScript variables and display it
in Chrome DevTools.
Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
When debugging JavaScript, it’s helpful to know the type of
a variable, parameter, and return values. JavaScript is
dynamically typed, and for complex
source code it’s often hard to infer types. With type profiling, we
can provide type information to JavaScript developers.
This CL is a proof of concept. It collects type profile for
assignments and simply prints the types to stdout.
The output looks something like this:
#my_var1
#Object
#number
#string
#number
#undefined
#string
#Object
#Object
We use an extra slot in the feedback vector of assignments to
carry the list of types for that assignment. The extra slot is
only added when the flag --type-profile is given.
Missing work:
* Collect data for parameters and return values (currently only assignments).
* Remove duplicates from the list of collected types and use a common base class.
* Add line numbers or source position instead of the variable name.
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2707873002
Cr-Original-Commit-Position: refs/heads/master@{#43791}
Committed: 0332bebde9
Review-Url: https://codereview.chromium.org/2707873002
Cr-Commit-Position: refs/heads/master@{#43804}
Reason for revert:
gcc bot has problems with this: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20gcc%204.8/builds/11858
Original issue's description:
> Collect type profile for DevTools
>
> Collect type information for JavaScript variables and display it
> in Chrome DevTools.
> Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
>
> When debugging JavaScript, it’s helpful to know the type of
> a variable, parameter, and return values. JavaScript is
> dynamically typed, and for complex
> source code it’s often hard to infer types. With type profiling, we
> can provide type information to JavaScript developers.
>
> This CL is a proof of concept. It collects type profile for
> assignments and simply prints the types to stdout.
>
> The output looks something like this:
>
> #my_var1
> #Object
> #number
> #string
> #number
> #undefined
> #string
> #Object
> #Object
>
>
> We use an extra slot in the feedback vector of assignments to
> carry the list of types for that assignment. The extra slot is
> only added when the flag --type-profile is given.
>
>
> Missing work:
> * Collect data for parameters and return values (currently only assignments).
> * Remove duplicates from the list of collected types and use a common base class.
> * Add line numbers or source position instead of the variable name.
>
>
>
> BUG=v8:5935
>
> Review-Url: https://codereview.chromium.org/2707873002
> Cr-Commit-Position: refs/heads/master@{#43791}
> Committed: 0332bebde9TBR=yangguo@chromium.org,mvstanton@chromium.org,rmcilroy@chromium.org,mstarzinger@chromium.org,franzih@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2749673003
Cr-Commit-Position: refs/heads/master@{#43798}
Collect type information for JavaScript variables and display it
in Chrome DevTools.
Design Doc: https://docs.google.com/a/google.com/document/d/1O1uepXZXBI6IwiawTrYC3ohhiNgzkyTdjn3R8ysbYgk/edit?usp=sharing
When debugging JavaScript, it’s helpful to know the type of
a variable, parameter, and return values. JavaScript is
dynamically typed, and for complex
source code it’s often hard to infer types. With type profiling, we
can provide type information to JavaScript developers.
This CL is a proof of concept. It collects type profile for
assignments and simply prints the types to stdout.
The output looks something like this:
#my_var1
#Object
#number
#string
#number
#undefined
#string
#Object
#Object
We use an extra slot in the feedback vector of assignments to
carry the list of types for that assignment. The extra slot is
only added when the flag --type-profile is given.
Missing work:
* Collect data for parameters and return values (currently only assignments).
* Remove duplicates from the list of collected types and use a common base class.
* Add line numbers or source position instead of the variable name.
BUG=v8:5935
Review-Url: https://codereview.chromium.org/2707873002
Cr-Commit-Position: refs/heads/master@{#43791}
In Isolate::CaptureSimpleStackTrace, we were ignoring interpreter entry
frames so far. This CLs changes this to gets the interpreted stack from
the wasm interpreter and add the frames to the FrameArray.
R=ahaas@chromium.org, titzer@chromium.org
BUG=v8:5822
Change-Id: I705909532ff28af412ff809da94522866eaa1c0d
Reviewed-on: https://chromium-review.googlesource.com/452378
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43772}
We emulate break by callling breakProgramCallback function in debugger context, we can just use HandleDebugBreak.
It allows us to move all stepping logic to debug.cc later and remove one usage of debugger context.
+ two minor issues fixed, see tests.
BUG=v8:5510
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2738503006
Cr-Commit-Position: refs/heads/master@{#43750}
Add a mechanic to set these Builtin exception predictions per-Isolate
rather than per-Context in the Bootstrapper.
Also add Debugger tests which would fail without these prediction
modes set.
Does not yet test for AsyncFromSyncIteratorPrototypeReturn, as this
requires AsyncGenerators and `yield*` to be hit.
BUG=chromium:691875
R=yangguo@chromium.org, jgruber@chromium.org, gsathya@chromium.org
Change-Id: Ic2d2aba3870cce2f7321080f4278875edf253c76
Reviewed-on: https://chromium-review.googlesource.com/451967
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Cr-Commit-Position: refs/heads/master@{#43742}
Once we enabled --turbo by default we need to turn all the implications
off with --no-turbo as well. Chrome sets flags in V8 using SetFlagFromString,
which enforces the implications each time it is called. Therefore, if --turbo
is enabled by default, and an unrelated flag is set, the turbo implications are
enabled but not later disabled if we set --no-turbo. To fix this, add negative
implications as well.
BUG=chromium:692409
Change-Id: Iadb0ca542f49ba65c7419cda8c7a03636a8d5ba9
Reviewed-on: https://chromium-review.googlesource.com/451320
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43655}
If the top-level function cannot be found, we previously assumed an
invocation count of 1. This is wrong when we expect the invocation
counts to be reset for precise coverage.
TBR=jgruber@chromium.orgR=caseq@chromium.org,pfeldman@chromium.org
BUG=v8:5808
Review-Url: https://codereview.chromium.org/2723003007
Cr-Commit-Position: refs/heads/master@{#43620}
This CL provide type with each break location, type could be: call, return or debugger statement.
BUG=chromium:432469
R=yangguo@chromium.org,dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2728563002
Cr-Commit-Position: refs/heads/master@{#43619}
This method could be called on pause and will do stepInto next scheduled callback if any will happen until next break.
First implementation support only callbacks chained by Promise.prototype.then.
BUG=chromium:432469
R=yangguo@chromium.org,dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2723273002
Cr-Commit-Position: refs/heads/master@{#43616}
If the imported wasm function is being debugged (i.e. redirects to the
interpreter), call it via the JS_TO_WASM stub, such that we can disable
the breakpoint later by patching the exported function.
This also contains a drive-by fix in wasm-translation.cc (for the case
that all known positions are bigger than the requested one).
R=titzer@chromium.org, kozyatinskiy@chromium.org
BUG=v8:5971, v8:5822
Review-Url: https://codereview.chromium.org/2720813002
Cr-Commit-Position: refs/heads/master@{#43583}
With inline breakpoints DevTools are ready for break position aligned breakpoints instead of statement aligned.
BUG=chromium:695236
R=dgozman@chromium.org,yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2709263002
Cr-Commit-Position: refs/heads/master@{#43385}
In current implementation we don't support nested scheduled break at all. If one break was scheduled inside another and second one doesn't produce actual break (execution was in blackboxed code or no JavaScript was executed) then second one will clear first scheduled break even if any not blackboxed JavaScript will be executed later.
Ambiguous break reason is added for the case when we have more then one scheduled reason. "auxData" in this case contains object with array of { reason: reason, auxData: auxData } objects for each reason in 'reasons' property.
BUG=chromium:632405
Review-Url: https://codereview.chromium.org/2678313002
Cr-Commit-Position: refs/heads/master@{#43021}
- removed getGeneratorObjectLocation from debugger-script.js,
- one more step to remove all debugger context usages in inspector.
BUG=v8:5510
R=yangguo@chromium.org,jgruber@chromium.org,alph@chromium.org
Review-Url: https://codereview.chromium.org/2678143002
Cr-Commit-Position: refs/heads/master@{#43018}
- entries preview available even if debugger agent is disabled,
- less deprecated mirrors usage in debugger-script.js
- no usage of debugger context - zero probability of leaking it.
- better test coverage.
BUG=v8:5510
R=yangguo@chromium.org,jgruber@chromium.org,alph@chromium.org,luoe@chromium.org
Review-Url: https://codereview.chromium.org/2672213002
Cr-Commit-Position: refs/heads/master@{#42978}
Blink uses access checks to be sure that objects from one context doesn't access objects in another. Heap profiler uses current context to call this checks, we need to be sure that current context is empty to allow heap profiler collect all objects without crash.
BUG=chromium:661223
R=alph@chromium.org,ulan@chromium.org
Review-Url: https://codereview.chromium.org/2669393002
Cr-Commit-Position: refs/heads/master@{#42939}
V8DebuggerAgentImpl::m_skipAllPaused is moved to V8Debugger.
V8DebuggerAgentImpl::didPaused doesn't return shouldBreak flag and called only when break is required and stack trace presented.
V8DebuggerAgentImpl doesn't store paused context.
Logic of conversion step-next at return into step-in is moved to debug.cc.
BUG=none
R=dgozman@chromium.org,yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2668763003
Cr-Commit-Position: refs/heads/master@{#42907}
