1 //===-- ThreadLauncher.cpp ---------------------------------------*- C++
2 //-*-===//
3 //
4 // The LLVM Compiler Infrastructure
5 //
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
8 //
9 //===----------------------------------------------------------------------===//
10
11 // lldb Includes
12 #include "lldb/Host/ThreadLauncher.h"
13 #include "lldb/Host/HostNativeThread.h"
14 #include "lldb/Host/HostThread.h"
15 #include "lldb/Utility/Log.h"
16
17 #if defined(_WIN32)
18 #include "lldb/Host/windows/windows.h"
19 #endif
20
21 using namespace lldb;
22 using namespace lldb_private;
23
LaunchThread(llvm::StringRef name,lldb::thread_func_t thread_function,lldb::thread_arg_t thread_arg,Status * error_ptr,size_t min_stack_byte_size)24 HostThread ThreadLauncher::LaunchThread(llvm::StringRef name,
25 lldb::thread_func_t thread_function,
26 lldb::thread_arg_t thread_arg,
27 Status *error_ptr,
28 size_t min_stack_byte_size) {
29 Status error;
30 if (error_ptr)
31 error_ptr->Clear();
32
33 // Host::ThreadCreateTrampoline will delete this pointer for us.
34 HostThreadCreateInfo *info_ptr =
35 new HostThreadCreateInfo(name.data(), thread_function, thread_arg);
36 lldb::thread_t thread;
37 #ifdef _WIN32
38 thread = (lldb::thread_t)::_beginthreadex(
39 0, (unsigned)min_stack_byte_size,
40 HostNativeThread::ThreadCreateTrampoline, info_ptr, 0, NULL);
41 if (thread == (lldb::thread_t)(-1L))
42 error.SetError(::GetLastError(), eErrorTypeWin32);
43 #else
44
45 // ASAN instrumentation adds a lot of bookkeeping overhead on stack frames.
46 #if __has_feature(address_sanitizer)
47 const size_t eight_megabytes = 8 * 1024 * 1024;
48 if (min_stack_byte_size < eight_megabytes) {
49 min_stack_byte_size += eight_megabytes;
50 }
51 #endif
52
53 pthread_attr_t *thread_attr_ptr = NULL;
54 pthread_attr_t thread_attr;
55 bool destroy_attr = false;
56 if (min_stack_byte_size > 0) {
57 if (::pthread_attr_init(&thread_attr) == 0) {
58 destroy_attr = true;
59 size_t default_min_stack_byte_size = 0;
60 if (::pthread_attr_getstacksize(&thread_attr,
61 &default_min_stack_byte_size) == 0) {
62 if (default_min_stack_byte_size < min_stack_byte_size) {
63 if (::pthread_attr_setstacksize(&thread_attr, min_stack_byte_size) ==
64 0)
65 thread_attr_ptr = &thread_attr;
66 }
67 }
68 }
69 }
70 int err =
71 ::pthread_create(&thread, thread_attr_ptr,
72 HostNativeThread::ThreadCreateTrampoline, info_ptr);
73
74 if (destroy_attr)
75 ::pthread_attr_destroy(&thread_attr);
76
77 error.SetError(err, eErrorTypePOSIX);
78 #endif
79 if (error_ptr)
80 *error_ptr = error;
81 if (!error.Success())
82 thread = LLDB_INVALID_HOST_THREAD;
83
84 return HostThread(thread);
85 }
86