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https://github.com/dart-lang/sdk
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347c49354e
Add asserts against using mutexes or monitors during the signal handler or suspended thread scopes. Poison use of Thread::Current during these scopes. TEST=ci Bug: https://github.com/dart-lang/sdk/issues/51124 Change-Id: If1df06520114105b2b4d8c81b4650bdb4efeaf50 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/283703 Reviewed-by: Ben Konyi <bkonyi@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
70 lines
2 KiB
C++
70 lines
2 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(DART_HOST_OS_LINUX)
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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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#ifndef PRODUCT
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DECLARE_FLAG(bool, trace_thread_interrupter);
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class ThreadInterrupterLinux : public AllStatic {
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public:
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static void ThreadInterruptSignalHandler(int signal,
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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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ThreadInterruptScope signal_handler_scope;
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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::PrintErr("ThreadInterrupter interrupting %p\n",
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reinterpret_cast<void*>(thread->id()));
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}
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int result = pthread_kill(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(&ThreadInterrupterLinux::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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#endif // !PRODUCT
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} // namespace dart
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#endif // defined(DART_HOST_OS_LINUX)
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