LLDB mainline
LLDBAssert.cpp
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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
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
15#if LLVM_SUPPORT_XCODE_SIGNPOSTS
16#include <os/log.h>
17#endif
18
19#include <atomic>
20
21namespace lldb_private {
22
23/// The default callback prints to stderr.
24static void DefaultAssertCallback(llvm::StringRef message,
25 llvm::StringRef backtrace,
26 llvm::StringRef prompt) {
27 llvm::errs() << message << '\n';
28 llvm::errs() << backtrace; // Backtrace includes a newline.
29 llvm::errs() << prompt << '\n';
30}
31
32static std::atomic<LLDBAssertCallback> g_lldb_assert_callback =
34
35void _lldb_assert(bool expression, const char *expr_text, const char *func,
36 const char *file, unsigned int line) {
37 if (LLVM_LIKELY(expression))
38 return;
39
40#if LLVM_SUPPORT_XCODE_SIGNPOSTS
41 if (__builtin_available(macos 10.12, iOS 10, tvOS 10, watchOS 3, *)) {
42 os_log_fault(OS_LOG_DEFAULT,
43 "Assertion failed: (%s), function %s, file %s, line %u\n",
44 expr_text, func, file, line);
45 }
46#endif
47
48 std::string buffer;
49 llvm::raw_string_ostream backtrace(buffer);
50 llvm::sys::PrintStackTrace(backtrace);
51
52 (*g_lldb_assert_callback.load())(
53 llvm::formatv("Assertion failed: ({0}), function {1}, file {2}, line {3}",
54 expr_text, func, file, line)
55 .str(),
56 buffer,
57 "Please file a bug report against lldb reporting this failure log, and "
58 "as many details as possible");
59}
60
62 g_lldb_assert_callback.exchange(callback);
63}
64
65} // namespace lldb_private
A class that represents a running process on the host machine.
static void DefaultAssertCallback(llvm::StringRef message, llvm::StringRef backtrace, llvm::StringRef prompt)
The default callback prints to stderr.
Definition: LLDBAssert.cpp:24
void _lldb_assert(bool expression, const char *expr_text, const char *func, const char *file, unsigned int line)
Don't use _lldb_assert directly.
Definition: LLDBAssert.cpp:35
void SetLLDBAssertCallback(LLDBAssertCallback callback)
Replace the LLDB assert callback.
Definition: LLDBAssert.cpp:61
void(* LLDBAssertCallback)(llvm::StringRef message, llvm::StringRef backtrace, llvm::StringRef prompt)
The default LLDB assert callback, which prints to stderr.
Definition: LLDBAssert.h:39
static std::atomic< LLDBAssertCallback > g_lldb_assert_callback
Definition: LLDBAssert.cpp:32