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 15 #if LLVM_SUPPORT_XCODE_SIGNPOSTS 16 #include <os/log.h> 17 #endif 18 19 #include <atomic> 20 21 namespace lldb_private { 22 23 /// The default callback prints to stderr. 24 static 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 32 static std::atomic<LLDBAssertCallback> g_lldb_assert_callback = 33 &DefaultAssertCallback; 34 35 void _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 61 void SetLLDBAssertCallback(LLDBAssertCallback callback) { 62 g_lldb_assert_callback.exchange(callback); 63 } 64 65 } // namespace lldb_private 66