forked from OSchip/llvm-project
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
//===-- sanitizer_stoptheworld.h --------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Defines the StopTheWorld function which suspends the execution of the current
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// process and runs the user-supplied callback in the same address space.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_STOPTHEWORLD_H
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#define SANITIZER_STOPTHEWORLD_H
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_common.h"
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namespace __sanitizer {
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typedef int SuspendedThreadID;
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// Holds the list of suspended threads and provides an interface to dump their
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// register contexts.
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class SuspendedThreadsList {
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public:
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SuspendedThreadsList()
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: thread_ids_(1024) {}
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SuspendedThreadID GetThreadID(uptr index) const {
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CHECK_LT(index, thread_ids_.size());
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return thread_ids_[index];
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}
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int GetRegistersAndSP(uptr index, uptr *buffer, uptr *sp) const;
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// The buffer in GetRegistersAndSP should be at least this big.
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static uptr RegisterCount();
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uptr thread_count() const { return thread_ids_.size(); }
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bool Contains(SuspendedThreadID thread_id) const {
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for (uptr i = 0; i < thread_ids_.size(); i++) {
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if (thread_ids_[i] == thread_id)
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return true;
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}
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return false;
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}
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void Append(SuspendedThreadID thread_id) {
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thread_ids_.push_back(thread_id);
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}
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private:
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InternalMmapVector<SuspendedThreadID> thread_ids_;
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// Prohibit copy and assign.
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SuspendedThreadsList(const SuspendedThreadsList&);
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void operator=(const SuspendedThreadsList&);
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};
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typedef void (*StopTheWorldCallback)(
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const SuspendedThreadsList &suspended_threads_list,
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void *argument);
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// Suspend all threads in the current process and run the callback on the list
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// of suspended threads. This function will resume the threads before returning.
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// The callback should not call any libc functions. The callback must not call
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// exit() nor _exit() and instead return to the caller.
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// This function should NOT be called from multiple threads simultaneously.
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void StopTheWorld(StopTheWorldCallback callback, void *argument);
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} // namespace __sanitizer
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#endif // SANITIZER_STOPTHEWORLD_H
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