Derek Xu
0a7aae2648
TEST=Verified that pkg/vm_service/test/profile_period_cli_option_test passes with the changes in this CL and fails without them. Change-Id: Ic36014abe682f9b4c829317b59bb664683e12d7e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/412781 Commit-Queue: Derek Xu <derekx@google.com> Reviewed-by: Siva Annamalai <asiva@google.com>
76 lines
1.9 KiB
C++
76 lines
1.9 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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#ifndef RUNTIME_VM_THREAD_INTERRUPTER_H_
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#define RUNTIME_VM_THREAD_INTERRUPTER_H_
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#include "vm/allocation.h"
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#include "vm/os_thread.h"
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#include "vm/signal_handler.h"
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#include "vm/thread.h"
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namespace dart {
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struct InterruptedThreadState {
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uintptr_t pc;
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uintptr_t csp;
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uintptr_t dsp;
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uintptr_t fp;
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uintptr_t lr;
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};
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class ThreadInterrupter : public AllStatic {
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public:
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static void Init(intptr_t period);
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static void Startup();
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static void Cleanup();
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// Delay between interrupts.
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//
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// Warning: This method will have no effect if
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// |ThreadInterrupter::initialized_| is false.
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static void SetInterruptPeriod(intptr_t period);
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// Wake up the thread interrupter thread.
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static void WakeUp();
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// Interrupt a thread.
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static void InterruptThread(OSThread* thread);
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// Prepare current thread for handling interrupts. Returns
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// opaque pointer to the allocated state (if any).
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static void* PrepareCurrentThread();
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// Cleanup any state which was created by |PrepareCurrentThread|.
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static void CleanupCurrentThreadState(void* state);
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private:
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static constexpr intptr_t kMaxThreads = 4096;
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static bool initialized_;
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static bool shutdown_;
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static bool thread_running_;
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static bool woken_up_;
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static ThreadJoinId interrupter_thread_id_;
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static Monitor* monitor_;
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static intptr_t interrupt_period_;
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static intptr_t current_wait_time_;
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static bool InDeepSleep() {
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return current_wait_time_ == Monitor::kNoTimeout;
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}
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static void ThreadMain(uword parameters);
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static void InstallSignalHandler();
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static void RemoveSignalHandler();
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friend class ThreadInterrupterVisitIsolates;
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};
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} // namespace dart
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#endif // RUNTIME_VM_THREAD_INTERRUPTER_H_
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