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
67
68
69
70
71
72
73
74
75
76
77
78
79
|
//===-- ThreadLauncher.cpp ------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// lldb Includes
#include "lldb/Host/ThreadLauncher.h"
#include "lldb/Host/HostNativeThread.h"
#include "lldb/Host/HostThread.h"
#include "lldb/Utility/Log.h"
#if defined(_WIN32)
#include "lldb/Host/windows/windows.h"
#endif
#include "llvm/Support/WindowsError.h"
using namespace lldb;
using namespace lldb_private;
llvm::Expected<HostThread>
ThreadLauncher::LaunchThread(llvm::StringRef name,
std::function<thread_result_t()> impl,
size_t min_stack_byte_size) {
// Host::ThreadCreateTrampoline will take ownership if thread creation is
// successful.
auto info_up = std::make_unique<HostThreadCreateInfo>(name.str(), impl);
lldb::thread_t thread;
#ifdef _WIN32
thread = (lldb::thread_t)::_beginthreadex(
0, (unsigned)min_stack_byte_size,
HostNativeThread::ThreadCreateTrampoline, info_up.get(), 0, NULL);
if (thread == LLDB_INVALID_HOST_THREAD)
return llvm::errorCodeToError(llvm::mapWindowsError(GetLastError()));
#else
// ASAN instrumentation adds a lot of bookkeeping overhead on stack frames.
#if __has_feature(address_sanitizer)
const size_t eight_megabytes = 8 * 1024 * 1024;
if (min_stack_byte_size < eight_megabytes) {
min_stack_byte_size += eight_megabytes;
}
#endif
pthread_attr_t *thread_attr_ptr = nullptr;
pthread_attr_t thread_attr;
bool destroy_attr = false;
if (min_stack_byte_size > 0) {
if (::pthread_attr_init(&thread_attr) == 0) {
destroy_attr = true;
size_t default_min_stack_byte_size = 0;
if (::pthread_attr_getstacksize(&thread_attr,
&default_min_stack_byte_size) == 0) {
if (default_min_stack_byte_size < min_stack_byte_size) {
if (::pthread_attr_setstacksize(&thread_attr, min_stack_byte_size) ==
0)
thread_attr_ptr = &thread_attr;
}
}
}
}
int err =
::pthread_create(&thread, thread_attr_ptr,
HostNativeThread::ThreadCreateTrampoline, info_up.get());
if (destroy_attr)
::pthread_attr_destroy(&thread_attr);
if (err)
return llvm::errorCodeToError(
std::error_code(err, std::generic_category()));
#endif
info_up.release();
return HostThread(thread);
}
|
