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78 lines
2.5 KiB
78 lines
2.5 KiB
4 months ago
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//===-- ThreadLauncher.cpp ------------------------------------------------===//
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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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#include "llvm/Support/WindowsError.h"
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using namespace lldb;
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using namespace lldb_private;
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llvm::Expected<HostThread> ThreadLauncher::LaunchThread(
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llvm::StringRef name, lldb::thread_func_t thread_function,
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lldb::thread_arg_t thread_arg, size_t min_stack_byte_size) {
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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_INVALID_HOST_THREAD)
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return llvm::errorCodeToError(llvm::mapWindowsError(GetLastError()));
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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 = nullptr;
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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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if (err)
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return llvm::errorCodeToError(
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std::error_code(err, std::generic_category()));
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#endif
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return HostThread(thread);
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}
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