1 //===-- ThreadLauncher.cpp ---------------------------------------*- 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 // lldb Includes
11 #include "lldb/Core/Log.h"
12 #include "lldb/Host/HostNativeThread.h"
13 #include "lldb/Host/HostThread.h"
14 #include "lldb/Host/ThisThread.h"
15 #include "lldb/Host/ThreadLauncher.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 
24 HostThread
25 ThreadLauncher::LaunchThread(llvm::StringRef name, lldb::thread_func_t thread_function, lldb::thread_arg_t thread_arg, Error *error_ptr, size_t min_stack_byte_size)
26 {
27     Error error;
28     if (error_ptr)
29         error_ptr->Clear();
30 
31     // Host::ThreadCreateTrampoline will delete this pointer for us.
32     HostThreadCreateInfo *info_ptr = new HostThreadCreateInfo(name.data(), thread_function, thread_arg);
33     lldb::thread_t thread;
34 #ifdef _WIN32
35     thread =
36         (lldb::thread_t)::_beginthreadex(0, (unsigned)min_stack_byte_size, HostNativeThread::ThreadCreateTrampoline, info_ptr, 0, NULL);
37     if (thread == (lldb::thread_t)(-1L))
38         error.SetError(::GetLastError(), eErrorTypeWin32);
39 #else
40 
41     pthread_attr_t *thread_attr_ptr = NULL;
42     pthread_attr_t thread_attr;
43     bool destroy_attr = false;
44     if (min_stack_byte_size > 0)
45     {
46         if (::pthread_attr_init (&thread_attr) == 0)
47         {
48             destroy_attr = true;
49             size_t default_min_stack_byte_size = 0;
50             if (::pthread_attr_getstacksize(&thread_attr, &default_min_stack_byte_size) == 0)
51             {
52                 if (default_min_stack_byte_size < min_stack_byte_size)
53                 {
54                     if (::pthread_attr_setstacksize (&thread_attr, min_stack_byte_size) == 0)
55                         thread_attr_ptr = &thread_attr;
56                 }
57             }
58 
59         }
60     }
61     int err = ::pthread_create(&thread, thread_attr_ptr, HostNativeThread::ThreadCreateTrampoline, info_ptr);
62 
63     if (destroy_attr)
64         ::pthread_attr_destroy(&thread_attr);
65 
66     error.SetError(err, eErrorTypePOSIX);
67 #endif
68     if (error_ptr)
69         *error_ptr = error;
70     if (!error.Success())
71         thread = LLDB_INVALID_HOST_THREAD;
72 
73     return HostThread(thread);
74 }
75