1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
//===-- sanitizer_stoptheworld.h --------------------------------*- C++ -*-===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Defines the StopTheWorld function which suspends the execution of the current
// process and runs the user-supplied callback in the same address space.
//
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_STOPTHEWORLD_H
#define SANITIZER_STOPTHEWORLD_H
#include "sanitizer_internal_defs.h"
#include "sanitizer_common.h"
namespace __sanitizer {
typedef int SuspendedThreadID;
// Holds the list of suspended threads and provides an interface to dump their
// register contexts.
class SuspendedThreadsList {
public:
SuspendedThreadsList()
: thread_ids_(1024) {}
SuspendedThreadID GetThreadID(uptr index) const {
CHECK_LT(index, thread_ids_.size());
return thread_ids_[index];
}
int GetRegistersAndSP(uptr index, uptr *buffer, uptr *sp) const;
// The buffer in GetRegistersAndSP should be at least this big.
static uptr RegisterCount();
uptr thread_count() const { return thread_ids_.size(); }
bool Contains(SuspendedThreadID thread_id) const {
for (uptr i = 0; i < thread_ids_.size(); i++) {
if (thread_ids_[i] == thread_id)
return true;
}
return false;
}
void Append(SuspendedThreadID thread_id) {
thread_ids_.push_back(thread_id);
}
private:
InternalMmapVector<SuspendedThreadID> thread_ids_;
// Prohibit copy and assign.
SuspendedThreadsList(const SuspendedThreadsList&);
void operator=(const SuspendedThreadsList&);
};
typedef void (*StopTheWorldCallback)(
const SuspendedThreadsList &suspended_threads_list,
void *argument);
// Suspend all threads in the current process and run the callback on the list
// of suspended threads. This function will resume the threads before returning.
// The callback should not call any libc functions.
// This function should NOT be called from multiple threads simultaneously.
void StopTheWorld(StopTheWorldCallback callback, void *argument);
} // namespace __sanitizer
#endif // SANITIZER_STOPTHEWORLD_H
|
