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 static void DefaultAssertCallback(llvm::StringRef message, 24 llvm::StringRef backtrace, 25 llvm::StringRef prompt) { 26 llvm::errs() << message << '\n'; 27 llvm::errs() << backtrace; // Backtrace includes a newline. 28 llvm::errs() << prompt << '\n'; 29 } 30 31 static std::atomic<LLDBAssertCallback> g_lldb_assert_callback = 32 &DefaultAssertCallback; 33 34 void lldb_assert(bool expression, const char *expr_text, const char *func, 35 const char *file, unsigned int line) { 36 if (LLVM_LIKELY(expression)) 37 return; 38 39 #if LLVM_SUPPORT_XCODE_SIGNPOSTS 40 if (__builtin_available(macos 10.12, iOS 10, tvOS 10, watchOS 3, *)) { 41 os_log_fault(OS_LOG_DEFAULT, 42 "Assertion failed: (%s), function %s, file %s, line %u\n", 43 expr_text, func, file, line); 44 } 45 #endif 46 47 // Print a warning and encourage the user to file a bug report, similar to 48 // LLVM’s crash handler, and then return execution. 49 std::string buffer; 50 llvm::raw_string_ostream backtrace(buffer); 51 llvm::sys::PrintStackTrace(backtrace); 52 53 (*g_lldb_assert_callback.load())( 54 llvm::formatv("Assertion failed: ({0}), function {1}, file {2}, line {3}", 55 expr_text, func, file, line) 56 .str(), 57 backtrace.str(), 58 "Please file a bug report against lldb reporting this failure log, and " 59 "as many details as possible"); 60 } 61 62 void SetLLDBAssertCallback(LLDBAssertCallback callback) { 63 g_lldb_assert_callback.exchange(callback); 64 } 65 66 } // namespace lldb_private 67