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//===-- ThreadLauncher.cpp ---------------------------------------*- C++
//-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// 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
using namespace lldb;
using namespace lldb_private;
HostThread ThreadLauncher::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) {
Status error;
if (error_ptr)
error_ptr->Clear();
// Host::ThreadCreateTrampoline will delete this pointer for us.
HostThreadCreateInfo *info_ptr =
new HostThreadCreateInfo(name.data(), thread_function, thread_arg);
lldb::thread_t thread;
#ifdef _WIN32
thread = (lldb::thread_t)::_beginthreadex(
0, (unsigned)min_stack_byte_size,
HostNativeThread::ThreadCreateTrampoline, info_ptr, 0, NULL);
if (thread == (lldb::thread_t)(-1L))
error.SetError(::GetLastError(), eErrorTypeWin32);
#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 = NULL;
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_ptr);
if (destroy_attr)
::pthread_attr_destroy(&thread_attr);
error.SetError(err, eErrorTypePOSIX);
#endif
if (error_ptr)
*error_ptr = error;
if (!error.Success())
thread = LLDB_INVALID_HOST_THREAD;
return HostThread(thread);
}
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