1//===-- LLDBAssert.cpp ----------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Utility/LLDBAssert.h"
10#include "llvm/Config/llvm-config.h"
11#include "llvm/Support/FormatVariadic.h"
12#include "llvm/Support/Signals.h"
13#include "llvm/Support/raw_ostream.h"
14#include <mutex>
15
16#if LLVM_SUPPORT_XCODE_SIGNPOSTS
17#include <os/log.h>
18#endif
19
20#include <atomic>
21
22namespace lldb_private {
23
24/// The default callback prints to stderr.
25static void DefaultAssertCallback(llvm::StringRef message,
26 llvm::StringRef backtrace,
27 llvm::StringRef prompt) {
28 llvm::errs() << message << '\n';
29 llvm::errs() << backtrace; // Backtrace includes a newline.
30 llvm::errs() << prompt << '\n';
31}
32
33static std::atomic<LLDBAssertCallback> g_lldb_assert_callback =
34 &DefaultAssertCallback;
35
36void _lldb_assert(bool expression, const char *expr_text, const char *func,
37 const char *file, unsigned int line,
38 std::once_flag &once_flag) {
39 if (LLVM_LIKELY(expression))
40 return;
41
42 std::call_once(once&: once_flag, f: [&]() {
43#if LLVM_SUPPORT_XCODE_SIGNPOSTS
44 if (__builtin_available(macos 10.12, iOS 10, tvOS 10, watchOS 3, *)) {
45 os_log_fault(OS_LOG_DEFAULT,
46 "Assertion failed: (%s), function %s, file %s, line %u\n",
47 expr_text, func, file, line);
48 }
49#endif
50
51 std::string buffer;
52 llvm::raw_string_ostream backtrace(buffer);
53 llvm::sys::PrintStackTrace(OS&: backtrace);
54
55 (*g_lldb_assert_callback.load())(
56 llvm::formatv(
57 Fmt: "Assertion failed: ({0}), function {1}, file {2}, line {3}",
58 Vals&: expr_text, Vals&: func, Vals&: file, Vals&: line)
59 .str(),
60 buffer,
61 "Please file a bug report against lldb and include the backtrace, the "
62 "version and as many details as possible.");
63 });
64}
65
66void SetLLDBAssertCallback(LLDBAssertCallback callback) {
67 g_lldb_assert_callback.exchange(p: callback);
68}
69
70} // namespace lldb_private
71

source code of lldb/source/Utility/LLDBAssert.cpp