mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
fa6a1684ef
Makes time spent in interpreted versus compiled Dart code visible in Observatory's pie chart. Will allow the profiler to know whether to start a stack walk from the machine code FP or the interpreter's FP. Remove dead Dart 1 frontend tags. Add tag for loading bytecode. Change-Id: I2c5a580e1581f8ccd5a93bb293899c81f900ef13 Reviewed-on: https://dart-review.googlesource.com/c/83564 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com> Reviewed-by: Régis Crelier <regis@google.com>
74 lines
2 KiB
C++
74 lines
2 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
#include "platform/globals.h"
|
|
#if defined(HOST_OS_LINUX)
|
|
|
|
#include <errno.h> // NOLINT
|
|
|
|
#include "vm/flags.h"
|
|
#include "vm/os.h"
|
|
#include "vm/profiler.h"
|
|
#include "vm/signal_handler.h"
|
|
#include "vm/thread_interrupter.h"
|
|
|
|
namespace dart {
|
|
|
|
#ifndef PRODUCT
|
|
|
|
DECLARE_FLAG(bool, trace_thread_interrupter);
|
|
|
|
class ThreadInterrupterLinux : public AllStatic {
|
|
public:
|
|
static void ThreadInterruptSignalHandler(int signal,
|
|
siginfo_t* info,
|
|
void* context_) {
|
|
if (signal != SIGPROF) {
|
|
return;
|
|
}
|
|
Thread* thread = Thread::Current();
|
|
if (thread == NULL) {
|
|
return;
|
|
}
|
|
// Extract thread state.
|
|
ucontext_t* context = reinterpret_cast<ucontext_t*>(context_);
|
|
mcontext_t mcontext = context->uc_mcontext;
|
|
InterruptedThreadState its;
|
|
its.pc = SignalHandler::GetProgramCounter(mcontext);
|
|
its.fp = SignalHandler::GetFramePointer(mcontext);
|
|
its.csp = SignalHandler::GetCStackPointer(mcontext);
|
|
its.dsp = SignalHandler::GetDartStackPointer(mcontext);
|
|
its.lr = SignalHandler::GetLinkRegister(mcontext);
|
|
Profiler::SampleThread(thread, its);
|
|
}
|
|
};
|
|
|
|
bool ThreadInterrupter::IsDebuggerAttached() {
|
|
return false;
|
|
}
|
|
|
|
void ThreadInterrupter::InterruptThread(OSThread* thread) {
|
|
if (FLAG_trace_thread_interrupter) {
|
|
OS::PrintErr("ThreadInterrupter interrupting %p\n",
|
|
reinterpret_cast<void*>(thread->id()));
|
|
}
|
|
int result = pthread_kill(thread->id(), SIGPROF);
|
|
ASSERT((result == 0) || (result == ESRCH));
|
|
}
|
|
|
|
void ThreadInterrupter::InstallSignalHandler() {
|
|
SignalHandler::Install<
|
|
ThreadInterrupterLinux::ThreadInterruptSignalHandler>();
|
|
}
|
|
|
|
void ThreadInterrupter::RemoveSignalHandler() {
|
|
SignalHandler::Remove();
|
|
}
|
|
|
|
#endif // !PRODUCT
|
|
|
|
} // namespace dart
|
|
|
|
#endif // defined(HOST_OS_LINUX)
|