John McCutchan ceb12c4f69 Switch profiler from isolates to threads ...

- API breakage: Dart_IsolateBlocked, Dart_IsolateUnblocked -> Dart_ThreadDisableProfiling, Dart_ThreadEnableProfiling.
- Remove IsolateProfilerData.
- Move thread at blocking call count from isolate to thread.
- Always interrupt threads unless they are blocked.
- We can no longer count "idle" ticks.
- Only record sample if thread is the current mutator of an isolate.
- Refactor ThreadInterrupterCallback to ensure that Thread* is valid.

Threads are only ever sent signals if ThreadInterruptsEnabled is true. Which is controlled by two functions:

void DisableThreadInterrupts();
void EnableThreadInterrupts();

R=asiva@google.com, iposva@google.com

Review URL: https://codereview.chromium.org/1423473004 .

2015-11-04 07:59:16 -08:00

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dart

VM thread shutdown.

2015-09-15 12:49:52 -07:00

data

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vm.status

Switch profiler from isolates to threads

2015-11-04 07:59:16 -08:00