msan_thread.h revision 2d1fdb26e458c4ddc04155c1d421bced3ba90cd0 
1//===-- msan_thread.h -------------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of MemorySanitizer.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MSAN_THREAD_H
15#define MSAN_THREAD_H
16
17#include "msan_allocator.h"
18#include "sanitizer_common/sanitizer_common.h"
19
20namespace __msan {
21
22class MsanThread {
23 public:
24  static MsanThread *Create(thread_callback_t start_routine, void *arg);
25  static void TSDDtor(void *tsd);
26  void Destroy();
27
28  void Init();  // Should be called from the thread itself.
29  thread_return_t ThreadStart();
30
31  uptr stack_top() { return stack_top_; }
32  uptr stack_bottom() { return stack_bottom_; }
33  uptr tls_begin() { return tls_begin_; }
34  uptr tls_end() { return tls_end_; }
35  bool IsMainThread() { return start_routine_ == 0; }
36
37  bool AddrIsInStack(uptr addr) {
38    return addr >= stack_bottom_ && addr < stack_top_;
39  }
40
41  bool InSignalHandler() { return in_signal_handler_; }
42  void EnterSignalHandler() { in_signal_handler_++; }
43  void LeaveSignalHandler() { in_signal_handler_--; }
44
45  MsanThreadLocalMallocStorage &malloc_storage() { return malloc_storage_; }
46
47  int destructor_iterations_;
48
49 private:
50  // NOTE: There is no MsanThread constructor. It is allocated
51  // via mmap() and *must* be valid in zero-initialized state.
52  void SetThreadStackAndTls();
53  void ClearShadowForThreadStackAndTLS();
54  thread_callback_t start_routine_;
55  void *arg_;
56  uptr stack_top_;
57  uptr stack_bottom_;
58  uptr tls_begin_;
59  uptr tls_end_;
60
61  unsigned in_signal_handler_;
62
63  MsanThreadLocalMallocStorage malloc_storage_;
64};
65
66MsanThread *GetCurrentThread();
67void SetCurrentThread(MsanThread *t);
68
69} // namespace __msan
70
71#endif // MSAN_THREAD_H
72