After discussion with Chrome reviewers for UMA, it was decided that we
would report array buffer allocation sizes in megabytes (not the log).
They also wanted to wait until there is proof that small array buffer
allocations would flood the histogram. Hence, all allocation sizes are
sampled.
There were several ways we could have added the notion of megabyte
samples to V8 code. None of them are a great fit. This code simply
provides a local function within the code that needs it.
Other possible solutions but rejected were:
a) Use a subclass of histogram to collect data at the megabyte level.
It has it's own Add() method that converts the size from bytes to
megabytes, and then call the generic add method AddSample(). This
solution appears to follow the conventions of subclasses of class
Histogram.
b) Use Chrome macros - Rejected because it involves changing the
counter representation of V8.
c) Add a method AddMegabyteSample() to base class Histogram. Rejected
because it may get confusing if a lot of different measures are
added the the base class of histograms.
d) Make method AddSample() virtual and override in the derived
class. Rejected in that sampling is supposed to be fast, and adding
a virtual call may be breaking that contract.
d) Do not add a derived class. Rather just do the conversions at the
call sites. Rejected because this duplicates code, and also makes
it hard to change assumptions on how to calculate.
For Chromes UMA changes see:
CL: https://codereview.chromium.org/2795463002
BUG=chromium:704922
R=bbudge@chromium.org,bradnelson@chromium.org,mtrofin@chromium.org
Review-Url: https://codereview.chromium.org/2795763002
Cr-Commit-Position: refs/heads/master@{#44388}
This reflects both the contract in blink, as well as what we
plan to do in streamed compilation, where we'll want to lay out
bytes received such that each section and each function body is
contiguous, but they may all be separate - which entails a copy.
BUG=chromium:697028
Review-Url: https://codereview.chromium.org/2797653002
Cr-Commit-Position: refs/heads/master@{#44387}
The past re-factoring inadvertently increased memory consumption for
AstConsString. This implements a micro-optimization to revert and slightly
improve beyond the original state.
Example, Zone size for parsing closure.js:
- 20,999,848 B (before refactoring)
- 21,651,056 B (after refactoring patch; 3.1% regression)
- 20,641,320 B (after this CL; 1.7% improvement over original)
(Reason: ZoneLinkedList requires 4 pointers to support
the std::list functionality (Zone*, head/tail ptr, payload ptr).
But since we only append and iterate in order and have the Zone*
available in the context, a super simple linked list (value + next ptr)
saves a bit of memory, especially for the common case of having 0 or 1
string segments.)
BUG=v8:6902, chromium:706935
Review-Url: https://codereview.chromium.org/2792353002
Cr-Commit-Position: refs/heads/master@{#44385}
When emitting a frame, we always push the old frame pointer at offset 0 relative
to the new frame pointer. However, we didn't emit DWARF opcodes to inform perf
of this.
BUG=
Review-Url: https://codereview.chromium.org/2795253002
Cr-Commit-Position: refs/heads/master@{#44384}
This reverts 1c1edda7db. I can't reproduce
the flakes locally anymore, let's see if this sticks.
BUG=v8:5619
Review-Url: https://codereview.chromium.org/2796053002
Cr-Commit-Position: refs/heads/master@{#44381}
The unwinding information we emit wrongly encodes code locations as relative
offsets. If we look at the .eh_frame section of shared object generated by "perf
inject" using "objdump -g":
~~~
00000000 0000000000000018 00000000 CIE
(snip)
0000001c 0000000000000028 00000020 FDE cie=00000000 pc=fffffffffffffee8..00000000000017f8
(snip)
00000048 ZERO terminator
~~~
We can see the range that the FDE entry covers is incorrect, it should point to
where the .text section is, at address 0x40 on a 64-bit architecture.
The reason for this was that the PerfJitLogger logs a code size that is
different from the one we've used when encoding the unwinding information. The
logger will ignore the safepoint table while the unwinding info assumes it is
part of the code.
BUG=
Review-Url: https://codereview.chromium.org/2790403002
Cr-Commit-Position: refs/heads/master@{#44378}
This makes it easier to match VariableProxys against variables in
Scopes (allocation-based prints such as local[0] or context[0] are not
unique).
R=vogelheim@chromium.org
Bug:
Change-Id: I8f86504f5e1657633286561e032805a8f6cff06e
Reviewed-on: https://chromium-review.googlesource.com/467486
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44376}
Support arbitrary arguments in %ArrayBufferNeuter without aborting for
future exposure in ClusterFuzz.
Change-Id: I3053a2139af215c9d417356bdeeda58d594d16aa
Reviewed-on: https://chromium-review.googlesource.com/465830
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44374}
Update according to new spec change at
https://github.com/tc39/ecma262/pull/856
- Call ToNumber only once in BUILTIN
- Remove unused FillNumberSlowPath
- FillImpl assumes obj_value->IsNumber() is true
- Update test
Bug:v8:5929,chromium:702902
Change-Id: Ic83e6754d043582955b81c76e68f95e1c6b7e901
Reviewed-on: https://chromium-review.googlesource.com/465646
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44373}
Getting elements, querying length or copying elements
are now const functions.
Drive-by fix: Noticed a few more getters that should be const.
Add a comment to ArrayList functions that are static functions.
BUG=
Change-Id: I5de1aed97510dea4e47cb974b3259da51ae663af
Reviewed-on: https://chromium-review.googlesource.com/467249
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44372}
Make sure that we call the destructors on all embedded object by
replacing the WasmInterpreterInternals::Delete method by an actual
destructor. This way, the compiler automatically calls destructors on
all embedded objects, in particular the IdentityMap in the CodeMap.
This change also requires to release managed objects *before*
tearing down the heap, because the wasm interpreter, referenced via
Managed<>, contains global handles. When those are destroyed, the
isolate still needs to be intact.
Drive-by: Fix include guard in managed.h.
R=ahaas@chromium.org, ulan@chromium.org, mvstanton@chromium.org
BUG=v8:5822
Change-Id: I9a067f037e013c84e4d697a1e913b27c683bb529
Reviewed-on: https://chromium-review.googlesource.com/466187
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44368}
This makes temporary variables nestable and fixes borked nesting with
function table calls by introducing a {TemporaryVariableScope} helper.
R=clemensh@chromium.org
TEST=mjsunit/regress/regress-6196
BUG=v8:6196
Change-Id: Ie760f27ce9ede3d4d5dacdebdc295c56cc666970
Reviewed-on: https://chromium-review.googlesource.com/467327
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44367}
Fix ff8b1abb1a
This fixes the problem with the alignment of typed arrays in turbofan. Namely,
Float64 typed arrays weren't properly aligned on 32bit architectures,
and this causes crashes on those architectures that do not support misaligned
memory access.
TEST=mjsunit/es6/typedarray-*
BUG=v8:6075
Review-Url: https://codereview.chromium.org/2784253002
Cr-Commit-Position: refs/heads/master@{#44366}
ArrayList is a FixedArray where kFirstIndex is > 0. The
Elements() methods returns a copy of the elements starting at
kFirstIndex, i.e., without the length that is stored in the first
slot.
Drive-by fix: Rename some variables.
BUG=
Change-Id: Ia1de73c4780a179301007f2ab9080fd08e8ea99d
Reviewed-on: https://chromium-review.googlesource.com/466186
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44365}
Return a structured objet with the type profile
information.
Move the test from message to mjsunit.
BUG=v8:5933
Change-Id: I3e1c592697924d87f82d46b0ddbdb6d82d9c8467
Reviewed-on: https://chromium-review.googlesource.com/464847
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44364}
For sloppy arguments in functions with declared formal parameters, the
apply with arguments optimization in TurboFan wouldn't kick in
currently, because so far there was no guard to see if using the
arguments from the stack or the frame state is safe. One easy to check
guard here is to just check that there's no observable side-effect
between the actual arguments creation and the call to apply.
BUG=v8:5267,v8:6200
R=danno@chromium.org
Review-Url: https://codereview.chromium.org/2789113004
Cr-Commit-Position: refs/heads/master@{#44363}
This fixes the name stored with functions where the declaration was
hoisted above the actual function definition. It also extends test
coverage and emits proper source position mapping for such cases.
R=clemensh@chromium.org
TEST=mjsunit/wasm/asm-wasm-stack
BUG=v8:6127
Change-Id: I675a98b244fe2157925e799b5c46b7f6bd53c9da
Reviewed-on: https://chromium-review.googlesource.com/466247
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44361}
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}
Add newline at the start of the function body.
BUG=v8:6190, v8:4958
R=littledan@chromium.org, adamk@chromium.org, caitp@igalia.com
Change-Id: I10db088ac9807a503382fd5080ad955e418d8b45
Reviewed-on: https://chromium-review.googlesource.com/466566
Reviewed-by: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Josh Wolfe <jwolfe@igalia.com>
Cr-Commit-Position: refs/heads/master@{#44352}
Minor fix: Provide a string for "%s".
R=hablich@chromium.org
Change-Id: Ibae24688c5f69e0fee5108701aa7f483117aea8c
Reviewed-on: https://chromium-review.googlesource.com/457998
Reviewed-by: Michael Hablich <hablich@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44350}
Seems to have been missed in this cleanup: crrev.com/2741683004.
Also updates a comment referring to internal fields.
Change-Id: I44b5fd49f5fb4b67b5288a6af959e4e963544368
Reviewed-on: https://chromium-review.googlesource.com/466147
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44349}
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}
Since byteOffset is configurable, we need to access byteOffset by
%_ArrayBufferViewGetByteOffset, instead of accessing .byteOffset
property.
BUG=v8:6120
Review-Url: https://codereview.chromium.org/2761673003
Cr-Commit-Position: refs/heads/master@{#44347}
When calling imported functions, we were always using the global object
as receiver. This is incorrect for strict functions, which should have
undefined as receiver.
This CL fixes this also for the interpreter, making us pass
test/mjsunit/wasm/receiver.js with --wasm-interpret-all.
R=ahaas@chromium.org
BUG=v8:5822
TEST=test/mjsunit/wasm/receiver
Change-Id: Ib7d637083245f67b668c11540e3c3473bc167129
Reviewed-on: https://chromium-review.googlesource.com/465986
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44346}
For OOB checks on memory accesses, we first subtracted the size of the
type to load/store from the memory size, and then compared against this
effective_size. If the memory size is smaller than the size of the type,
this would lead to an integer underflow, and we would try to load the
value.
This CL fixes this, and adds a test case for this.
R=ahaas@chromium.org
BUG=v8:5822
Change-Id: I26fcba0be7343c88b8459d029b0c0af095d2466a
Reviewed-on: https://chromium-review.googlesource.com/465946
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44345}
JSObject is slow: creating strings for keys and storing values by these keys after takes significant amount of time.
With this CL console methods (most of them collect top stack frame to calculate source location) are ~33% faster.
V8Debugger::captureStackTrace is ~50% faster.
BUG=v8:6189
R=yangguo@chromium.orgTBR=bmeurer@chromium.org
Review-Url: https://codereview.chromium.org/2789073002
Cr-Commit-Position: refs/heads/master@{#44344}
Bool flags can be as small as one byte, so testing an IntPtr-sized value
is incorrect.
BUG=v8:6172
Review-Url: https://codereview.chromium.org/2792963002
Cr-Commit-Position: refs/heads/master@{#44343}
Translates code of the form 'if (x === undefined)' into the JumpIfUndefined
bytecode, and similarly for comparisons with null. Also adds bytecodes for
JumpIfNotUndefined / Null.
Moves the peephole optimization for CompareUndefined out of the peephole
optimizer and into the BytecodeGenerator, having the side-effect of enabling
it for comparisons with undefined on both side of the compare operation.
BUG=v8:6107
Review-Url: https://codereview.chromium.org/2793923002
Cr-Commit-Position: refs/heads/master@{#44341}
With --harmony-function-tostring enabled (now enabled by --harmony),
CompileFunctionInContext would produce incorrect results whenever called
with 1 or more argument parameters, due to specifying an incorrect end
position for the parameters.
BUG=v8:6190, v8:4958
R=littledan@chromium.org, adamk@chromium.org, jwolfe@igalia.com
Change-Id: Ied2bcba44116311ebcae3967963472b4e1058fd3
Reviewed-on: https://chromium-review.googlesource.com/465515
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44340}
This CL adds support to parse a PushStackTraceAndDie dump on a windows
minidump:
Stack Message:
magic1: 00000000bbbbbbbb
magic2: 00000000bbbbbbbb
ptr1: 00000015f9ca78d1 T
ptr2: 0000000000000000
message start: 00000000002c58f0 S
stack_start: 00000000002cd8f0 S
All addresses within the message are annotated with the address marker to
make it easier to spot objects that are contained in the minidump.
Currently this doesn't work on OSX yet as we do not correctly push the two
magic markers on the stack.
Change-Id: I8385bb66a76bd253c4014bc7e25971d03830dd4d
Reviewed-on: https://chromium-review.googlesource.com/466007
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44339}
