Siva Annamalai
9e19d236ca
fields in a thread (i.e fields that are not Dart VM related) - Split the Thread structure to be a pure Dart per thread structure and add a pointer to os_thread which points to the OSThread structure - Change Schedule/UnSchedule to set the Dart Thread structure as the TLS of the thread when it is inside the Dart world and reset the TLS back to the OSThread strcuture when is exits the Dart World. - Moved the stack_base and few stack size related functions to OSThread from Isolate R=johnmccutchan@google.com, zra@google.com Review URL: https://codereview.chromium.org/1439483003 .
70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(TARGET_OS_ANDROID)
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#include <sys/syscall.h> // NOLINT
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#include <errno.h> // NOLINT
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#include "vm/flags.h"
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#include "vm/os.h"
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#include "vm/profiler.h"
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#include "vm/signal_handler.h"
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#include "vm/thread_interrupter.h"
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namespace dart {
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DECLARE_FLAG(bool, thread_interrupter);
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DECLARE_FLAG(bool, trace_thread_interrupter);
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class ThreadInterrupterAndroid : public AllStatic {
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public:
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static void ThreadInterruptSignalHandler(int signal, siginfo_t* info,
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void* context_) {
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if (signal != SIGPROF) {
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return;
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}
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Thread* thread = Thread::Current();
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if (thread == NULL) {
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return;
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}
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// Extract thread state.
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ucontext_t* context = reinterpret_cast<ucontext_t*>(context_);
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mcontext_t mcontext = context->uc_mcontext;
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InterruptedThreadState its;
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its.pc = SignalHandler::GetProgramCounter(mcontext);
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its.fp = SignalHandler::GetFramePointer(mcontext);
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its.csp = SignalHandler::GetCStackPointer(mcontext);
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its.dsp = SignalHandler::GetDartStackPointer(mcontext);
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its.lr = SignalHandler::GetLinkRegister(mcontext);
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Profiler::SampleThread(thread, its);
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}
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};
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void ThreadInterrupter::InterruptThread(OSThread* thread) {
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if (FLAG_trace_thread_interrupter) {
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OS::Print("ThreadInterrupter interrupting %p\n",
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reinterpret_cast<void*>(thread->id()));
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}
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int result = syscall(__NR_tgkill, getpid(), thread->id(), SIGPROF);
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ASSERT((result == 0) || (result == ESRCH));
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}
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void ThreadInterrupter::InstallSignalHandler() {
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SignalHandler::Install(
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ThreadInterrupterAndroid::ThreadInterruptSignalHandler);
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}
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void ThreadInterrupter::RemoveSignalHandler() {
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SignalHandler::Remove();
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}
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} // namespace dart
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#endif // defined(TARGET_OS_ANDROID)
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