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#include "sanitizer_common/sanitizer_libc.h"
22
23namespace __asan {
24
25const u32 kInvalidTid = 0xffffff;  // Must fit into 24 bits.
26
27class AsanThread;
28
29// These objects are created for every thread and are never deleted,
30// so we can find them by tid even if the thread is long dead.
31class AsanThreadSummary {
32 public:
33  explicit AsanThreadSummary(LinkerInitialized) { }  // for T0.
34  void Init(u32 parent_tid, StackTrace *stack) {
35    parent_tid_ = parent_tid;
36    announced_ = false;
37    tid_ = kInvalidTid;
38    if (stack) {
39      internal_memcpy(&stack_, stack, sizeof(*stack));
40    }
41    thread_ = 0;
42  }
43  u32 tid() { return tid_; }
44  void set_tid(u32 tid) { tid_ = tid; }
45  u32 parent_tid() { return parent_tid_; }
46  bool announced() { return announced_; }
47  void set_announced(bool announced) { announced_ = announced; }
48  StackTrace *stack() { return &stack_; }
49  AsanThread *thread() { return thread_; }
50  void set_thread(AsanThread *thread) { thread_ = thread; }
51  static void TSDDtor(void *tsd);
52
53 private:
54  u32 tid_;
55  u32 parent_tid_;
56  bool announced_;
57  StackTrace 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  static AsanThread *Create(u32 parent_tid, thread_callback_t start_routine,
66                            void *arg, StackTrace *stack);
67  void Destroy();
68
69  void Init();  // Should be called from the thread itself.
70  thread_return_t ThreadStart();
71
72  uptr stack_top() { return stack_top_; }
73  uptr stack_bottom() { return stack_bottom_; }
74  uptr stack_size() { return stack_top_ - stack_bottom_; }
75  u32 tid() { return summary_->tid(); }
76  AsanThreadSummary *summary() { return summary_; }
77  void set_summary(AsanThreadSummary *summary) { summary_ = summary; }
78
79  const char *GetFrameNameByAddr(uptr addr, uptr *offset);
80
81  bool AddrIsInStack(uptr 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 private:
90  void SetThreadStackTopAndBottom();
91  void ClearShadowForThreadStack();
92  AsanThreadSummary *summary_;
93  thread_callback_t start_routine_;
94  void *arg_;
95  uptr  stack_top_;
96  uptr  stack_bottom_;
97
98  FakeStack fake_stack_;
99  AsanThreadLocalMallocStorage malloc_storage_;
100  AsanStats stats_;
101};
102
103}  // namespace __asan
104
105#endif  // ASAN_THREAD_H
106