2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
//===-- ThreadLauncher.cpp ---------------------------------------*- C++
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//-*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// lldb Includes
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#include "lldb/Host/ThreadLauncher.h"
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#include "lldb/Host/HostNativeThread.h"
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#include "lldb/Host/HostThread.h"
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#include "lldb/Utility/Log.h"
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#if defined(_WIN32)
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#include "lldb/Host/windows/windows.h"
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#endif
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using namespace lldb;
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using namespace lldb_private;
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HostThread ThreadLauncher::LaunchThread(llvm::StringRef name,
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lldb::thread_func_t thread_function,
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lldb::thread_arg_t thread_arg,
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Status *error_ptr,
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size_t min_stack_byte_size) {
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Status error;
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if (error_ptr)
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error_ptr->Clear();
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// Host::ThreadCreateTrampoline will delete this pointer for us.
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HostThreadCreateInfo *info_ptr =
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new HostThreadCreateInfo(name.data(), thread_function, thread_arg);
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lldb::thread_t thread;
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#ifdef _WIN32
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thread = (lldb::thread_t)::_beginthreadex(
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0, (unsigned)min_stack_byte_size,
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HostNativeThread::ThreadCreateTrampoline, info_ptr, 0, NULL);
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if (thread == (lldb::thread_t)(-1L))
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error.SetError(::GetLastError(), eErrorTypeWin32);
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#else
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// ASAN instrumentation adds a lot of bookkeeping overhead on stack frames.
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#if __has_feature(address_sanitizer)
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const size_t eight_megabytes = 8 * 1024 * 1024;
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if (min_stack_byte_size < eight_megabytes) {
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min_stack_byte_size += eight_megabytes;
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}
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#endif
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pthread_attr_t *thread_attr_ptr = NULL;
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pthread_attr_t thread_attr;
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bool destroy_attr = false;
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if (min_stack_byte_size > 0) {
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if (::pthread_attr_init(&thread_attr) == 0) {
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destroy_attr = true;
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size_t default_min_stack_byte_size = 0;
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if (::pthread_attr_getstacksize(&thread_attr,
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&default_min_stack_byte_size) == 0) {
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if (default_min_stack_byte_size < min_stack_byte_size) {
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if (::pthread_attr_setstacksize(&thread_attr, min_stack_byte_size) ==
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0)
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thread_attr_ptr = &thread_attr;
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}
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}
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}
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}
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int err =
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::pthread_create(&thread, thread_attr_ptr,
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HostNativeThread::ThreadCreateTrampoline, info_ptr);
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if (destroy_attr)
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::pthread_attr_destroy(&thread_attr);
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error.SetError(err, eErrorTypePOSIX);
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#endif
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if (error_ptr)
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*error_ptr = error;
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if (!error.Success())
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thread = LLDB_INVALID_HOST_THREAD;
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return HostThread(thread);
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}
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