Mark HStringCompareAndBranch as potentially causing GCs.

Mark HStringCompareAndBranch as potentially causing GCs.

This also adds a %SetAllocationTimout runtime function which helps to
write regression tests that need to trigger a GC at a certain point in
program execution.

R=hpayer@chromium.org
BUG=chromium:274438
TEST=mjsunit/regress/regress-crbug-274438

Committed: http://code.google.com/p/v8/source/detail?r=16205

[Hannes Payer (out of office), 2013-08-16 13:56:28]

prime LGTM

https://codereview.chromium.org/22933006/diff/1/src/heap.cc
File src/heap.cc (right):

https://codereview.chromium.org/22933006/diff/1/src/heap.cc#newcode4019
src/heap.cc:4019: { MaybeObject* maybe_result = AllocateRaw(size, space, space);
We should use AllocateRaw in all Allocate* functions. We should clean that up in
a follow-up CL.

https://codereview.chromium.org/22933006/diff/1/test/mjsunit/regress/regress-...
File test/mjsunit/regress/regress-crbug-274438.js (right):

https://codereview.chromium.org/22933006/diff/1/test/mjsunit/regress/regress-...
test/mjsunit/regress/regress-crbug-274438.js:41: %SetAllocationTimeout(100, 0);
cool!

[Michael Starzinger, 2013-08-16 15:10:21]

Committed patchset #1 manually as r16205.

[Michael Starzinger, 2013-08-16 15:10:53]

https://codereview.chromium.org/22933006/diff/1/src/heap.cc
File src/heap.cc (right):

https://codereview.chromium.org/22933006/diff/1/src/heap.cc#newcode4019
src/heap.cc:4019: { MaybeObject* maybe_result = AllocateRaw(size, space, space);
On 2013/08/16 13:56:28, Hannes Payer wrote:
> We should use AllocateRaw in all Allocate* functions. We should clean that up
in
> a follow-up CL.

Yes, I wholeheartedly agree. It's on my plate as a follow-up.