Reviewers: dcarney,
Description:
Reland r18363.
Introduce API to temporarily interrupt long running JavaScript code.
It is different from termination API as interrupted JavaScript will
continue to
execute normally when registered InterruptCallback returns.
/**
* Request V8 to interrupt long running JavaScript code and invoke
* the given |callback| passing the given |data| to it. After |callback|
* returns control will be returned to the JavaScript code.
* At any given moment V8 can remember only a single callback for the very
* last interrupt request.
* Can be called from another thread without acquiring a |Locker|.
* Registered |callback| must not reenter interrupted Isolate.
*/
void RequestInterrupt(InterruptCallback callback, void* data);
/**
* Clear interrupt request created by |RequestInterrupt|.
* Can be called from another thread without acquiring a |Locker|.
*/
void ClearInterrupt();
Fix Hydrogen SCE pass to avoid eliminating stack guards too aggressively.
Only
normal JavaScript functions are guaranteed to have stack guard in the
prologue.
If function is a builtin or has a custom call IC it will lack one.
Changes from r18363:
- includes r18364 to fix compilation errors: removes debugging only code;
- makes interrupiton related tests not threaded, because they rely on having
exclusive access to the V8 instance and the fact that they can only
interrupt
themselves, if they are interrupted from the outside they break;
- changes HasStackCheck predicate used during SCE pass to avoid handles
dereference to make SCE compatible with parallel recompilation.
[email protected]
Please review this at https://codereview.chromium.org/104823008/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files (+371, -9 lines):
M include/v8.h
M src/api.cc
M src/execution.h
M src/execution.cc
M src/hydrogen-instructions.h
M src/hydrogen-sce.cc
M test/cctest/test-api.cc
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