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//===-- LLDBAssert.cpp ----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Utility/LLDBAssert.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/raw_ostream.h"
#include <mutex>
#if LLVM_SUPPORT_XCODE_SIGNPOSTS
#include <os/log.h>
#endif
#include <atomic>
namespace lldb_private {
/// The default callback prints to stderr.
static void DefaultAssertCallback(llvm::StringRef message,
llvm::StringRef backtrace,
llvm::StringRef prompt) {
llvm::errs() << message << '\n';
llvm::errs() << backtrace; // Backtrace includes a newline.
llvm::errs() << prompt << '\n';
}
static std::atomic<LLDBAssertCallback> g_lldb_assert_callback =
&DefaultAssertCallback;
void _lldb_assert(bool expression, const char *expr_text, const char *func,
const char *file, unsigned int line,
std::once_flag &once_flag) {
if (LLVM_LIKELY(expression))
return;
std::call_once(once_flag, [&]() {
#if LLVM_SUPPORT_XCODE_SIGNPOSTS
if (__builtin_available(macos 10.12, iOS 10, tvOS 10, watchOS 3, *)) {
os_log_fault(OS_LOG_DEFAULT,
"Assertion failed: (%s), function %s, file %s, line %u\n",
expr_text, func, file, line);
}
#endif
std::string buffer;
llvm::raw_string_ostream backtrace(buffer);
llvm::sys::PrintStackTrace(backtrace);
(*g_lldb_assert_callback.load())(
llvm::formatv(
"Assertion failed: ({0}), function {1}, file {2}, line {3}",
expr_text, func, file, line)
.str(),
buffer,
"Please file a bug report against lldb and include the backtrace, the "
"version and as many details as possible.");
});
}
void SetLLDBAssertCallback(LLDBAssertCallback callback) {
g_lldb_assert_callback.exchange(callback);
}
} // namespace lldb_private
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