port 15f8213809 (r27263)
original commit message:
This relands commit 96f79568a9.
This makes the Isolate::Throw logic not depend on a prediction of
whether an exception is caught or uncaught. Such a prediction is
inherently undecidable because a finally block can decide between
consuming or re-throwing an exception depending on arbitray control
flow.
There still is a conservative prediction mechanism in place that
components like the debugger or tracing can use for reporting.
With this change we can get rid of the StackHandler::kind field, a
pre-requisite to do table-based lookups of exception handlers.
BUG=
Review URL: https://codereview.chromium.org/1027413002
Cr-Commit-Position: refs/heads/master@{#27385}
Every time embedder calls v8::HeapProfiler::GetHeapStats we store next unuassigned heap object id and timestamp of the request. This patch serializes all that data into heap snapshot so that embedder can restore allocation timeline.
BUG=chromium:467222
LOG=Y
Review URL: https://codereview.chromium.org/1019813004
Cr-Commit-Position: refs/heads/master@{#27384}
Port 6689cc27eb
Original commit message:
Handlers should be in charge of this work. The change uncovered a bug in
vector-ics related to keyed loads into strings. It's important for
StringCharCodeAtGenerator, a helper used in full code and in
LoadIndexedStringStub (a handler) to protect the vector and slot registers
when it makes a runtime call to convert a HeapNumber to a Smi.
It's still possible for the handler to MISS after this call, perhaps due
to out of bounds access. In that case, the vector and slot registers need
to be delivered safely to the MISS handler.
BUG=
Review URL: https://codereview.chromium.org/1025303005
Cr-Commit-Position: refs/heads/master@{#27383}
Port 15f8213809
Original commit message:
This relands commit 96f79568a9.
This makes the Isolate::Throw logic not depend on a prediction of
whether an exception is caught or uncaught. Such a prediction is
inherently undecidable because a finally block can decide between
consuming or re-throwing an exception depending on arbitray control
flow.
There still is a conservative prediction mechanism in place that
components like the debugger or tracing can use for reporting.
With this change we can get rid of the StackHandler::kind field, a
pre-requisite to do table-based lookups of exception handlers.
R=mbrandy@us.ibm.com, yangguo@chromium.org, svenpanne@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1016333002
Cr-Commit-Position: refs/heads/master@{#27381}
Handlers should be in charge of this work. The change uncovered a bug in
vector-ics related to keyed loads into strings. It's important for
StringCharCodeAtGenerator, a helper used in full code and in
LoadIndexedStringStub (a handler) to protect the vector and slot registers
when it makes a runtime call to convert a HeapNumber to a Smi.
It's still possible for the handler to MISS after this call, perhaps due
to out of bounds access. In that case, the vector and slot registers need
to be delivered safely to the MISS handler.
BUG=
Review URL: https://codereview.chromium.org/1028093002
Cr-Commit-Position: refs/heads/master@{#27377}
This removes the stub-based constructor from CompilationInfoWithZone
as this class is more than a pure convenience class and only by chance
doesn't have an effect in the destructor.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1026513004
Cr-Commit-Position: refs/heads/master@{#27376}
This method uses in messages.js in GetSourceLine and GetPositionInLine. This methods uses in v8::Message API methods and there is no documentation about it.
Method looks obsolete.
One of the strange side effect is shown by attached issue.
BUG=chromium:468781
R=yangguo@chromium.org
LOG=Y
Review URL: https://codereview.chromium.org/1022333004
Cr-Commit-Position: refs/heads/master@{#27374}
15.5.4.6 5.b requires each part to be converted using ToString(). This also needs to occur in the single argument fast-case.
BUG=v8:3981
R=arv@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/1029103002
Cr-Commit-Position: refs/heads/master@{#27372}
This allows using %OptimizeFunctionOnNextCall and friends even when
Crankshaft is disabled. Note that this should only affect code paths
that are not relevant to performance. By now we have a single bailout
point in place within OptimizedCompileJob::CreateGraph that ensures
Crankshaft is only used when enabled and supported.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/999173007
Cr-Commit-Position: refs/heads/master@{#27367}
Port 34a1a76ddf
Original commit message:
A hydrogen code stub is not the best approach because it builds a frame
and doesn't have the technology to discard roots at tail call exits.
Platform-specific stubs provide much better performance at this point.
R=verwaest@chromium.org, mbrandy@us.ibm.com
BUG=
Review URL: https://codereview.chromium.org/1019003002
Cr-Commit-Position: refs/heads/master@{#27365}
port d4696c4841 (r27150)
original commit message:
This moves the decision whether to report a message or not to when
the pending exception is propagated instead of trying to preserve the
decision in a ThreadLocalTop field.
BUG=
Review URL: https://codereview.chromium.org/1028073002
Cr-Commit-Position: refs/heads/master@{#27360}
port f71e262683 (r27127)
original commit message:
Simplify pending message script handling.
This removes the separate tracking of the pending message script,
because that script is already stored in the message object and
duplicating it in the ThreadLocalTop makes it more brittle.
BUG=
R=weiliang.lin@intel.com
Review URL: https://codereview.chromium.org/1028993003
Cr-Commit-Position: refs/heads/master@{#27358}
port 36e69a916f (r27115)
original commit message:
This reduces the size of the StackHandler by yet another word. We no
longer need to keep track of the frame pointer, as the stack walk will
be able to recalculate it.
BUG=
Review URL: https://codereview.chromium.org/1030563002
Cr-Commit-Position: refs/heads/master@{#27357}
port 8d946b9c3f (r27106).
original commit message:
[es6] Throw TypeError for computed static prototype property name
The prototype of a class constructor function is read only. When we set
computed property names we were ignoring this and we were overriding the
property.
Since the prototype is the only possible own read only property on the
constructor function object we special case this so we do not have to
check this for every property in the class literal.
BUG=
Review URL: https://codereview.chromium.org/1028983002
Cr-Commit-Position: refs/heads/master@{#27356}
We were using ToObject in a lot of places where the common case is that
we already have an object. By changing to TO_OBJECT_INLINE we don't
have to go through 5 different if statements before falling through.
We were also calling ToObject too many times in DefineObjectProperty
where we already know that obj is an object.
BUG=None
LOG=N
Review URL: https://codereview.chromium.org/1019413002
Cr-Commit-Position: refs/heads/master@{#27355}
The final spec for Object.getPrototypeOf calls ToObject on the
parameter, which means that it should only throw for null and
undefined. For other non object values the prototype of the wrapper
should be used.
BUG=v8:3964
LOG=N
R=adamk, rossberg@chromium.org
Review URL: https://codereview.chromium.org/1014813003
Cr-Commit-Position: refs/heads/master@{#27354}
port e0aa8ebf93 (r27103).
original commit message:
This reduces the size of the StackHandler by one word. We no longer
need to keep track of the code object, as the stack walk finds it.
BUG=
R=weiliang.lin@intel.com
Review URL: https://codereview.chromium.org/1022403002
Cr-Commit-Position: refs/heads/master@{#27353}
port 1382879f29 (r27016).
oringinal commit message:
[turbofan] Implement throwing exceptions into TurboFan code.
This extends the stack unwinding logic to respect optimized frames
and perform a lookup in the handler table to find handlers. It also
contains fixes to the API call stubs to allow a stack walk while
promoting scheduled exceptions.
BUG=
Review URL: https://codereview.chromium.org/1023943002
Cr-Commit-Position: refs/heads/master@{#27342}
