asan_thread.h revision 229109 
1//===-- asan_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 AddressSanitizer, an address sanity checker.
11//
12// ASan-private header for asan_thread.cc.
13//===----------------------------------------------------------------------===//
14#ifndef ASAN_THREAD_H
15#define ASAN_THREAD_H
16
17#include "asan_allocator.h"
18#include "asan_internal.h"
19#include "asan_stack.h"
20#include "asan_stats.h"
21
22namespace __asan {
23
24const size_t kMaxThreadStackSize = 16 * (1 << 20);  // 16M
25
26class AsanThread;
27
28// These objects are created for every thread and are never deleted,
29// so we can find them by tid even if the thread is long dead.
30class AsanThreadSummary {
31 public:
32  explicit AsanThreadSummary(LinkerInitialized) { }  // for T0.
33  AsanThreadSummary(int tid, int parent_tid, AsanStackTrace *stack)
34      : tid_(tid),
35        parent_tid_(parent_tid),
36        announced_(false) {
37    if (stack) {
38      stack_ = *stack;
39    }
40    thread_ = 0;
41  }
42  void Announce() {
43    if (tid_ == 0) return;  // no need to announce the main thread.
44    if (!announced_) {
45      announced_ = true;
46      Printf("Thread T%d created by T%d here:\n", tid_, parent_tid_);
47      stack_.PrintStack();
48    }
49  }
50  int tid() { return tid_; }
51  AsanThread *thread() { return thread_; }
52  void set_thread(AsanThread *thread) { thread_ = thread; }
53 private:
54  int tid_;
55  int parent_tid_;
56  bool announced_;
57  AsanStackTrace stack_;
58  AsanThread *thread_;
59};
60
61// AsanThread are stored in TSD and destroyed when the thread dies.
62class AsanThread {
63 public:
64  explicit AsanThread(LinkerInitialized);  // for T0.
65  AsanThread(int parent_tid, void *(*start_routine) (void *),
66             void *arg, AsanStackTrace *stack);
67  ~AsanThread();
68
69  void Init();  // Should be called from the thread itself.
70  void *ThreadStart();
71
72  uintptr_t stack_top() { return stack_top_; }
73  uintptr_t stack_bottom() { return stack_bottom_; }
74  size_t stack_size() { return stack_top_ - stack_bottom_; }
75  int tid() { return summary_->tid(); }
76  AsanThreadSummary *summary() { return summary_; }
77  void set_summary(AsanThreadSummary *summary) { summary_ = summary; }
78
79  const char *GetFrameNameByAddr(uintptr_t addr, uintptr_t *offset);
80
81  bool AddrIsInStack(uintptr_t addr) {
82    return addr >= stack_bottom_ && addr < stack_top_;
83  }
84
85  FakeStack &fake_stack() { return fake_stack_; }
86  AsanThreadLocalMallocStorage &malloc_storage() { return malloc_storage_; }
87  AsanStats &stats() { return stats_; }
88
89  static const int kInvalidTid = -1;
90
91 private:
92
93  void SetThreadStackTopAndBottom();
94  void ClearShadowForThreadStack();
95  AsanThreadSummary *summary_;
96  void *(*start_routine_) (void *param);
97  void *arg_;
98  uintptr_t  stack_top_;
99  uintptr_t  stack_bottom_;
100
101  FakeStack fake_stack_;
102  AsanThreadLocalMallocStorage malloc_storage_;
103  AsanStats stats_;
104};
105
106}  // namespace __asan
107
108#endif  // ASAN_THREAD_H
109