1 //===-- sanitizer_symbolize.cpp ---------------------------------*- C++ -*-===//
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 // Implementation of weak hooks from sanitizer_symbolizer_posix_libcdep.cpp.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include <stdio.h>
14
15 #include <string>
16
17 #include "llvm/DebugInfo/Symbolize/DIPrinter.h"
18 #include "llvm/DebugInfo/Symbolize/Symbolize.h"
19
getDefaultSymbolizer()20 static llvm::symbolize::LLVMSymbolizer *getDefaultSymbolizer() {
21 static llvm::symbolize::LLVMSymbolizer *DefaultSymbolizer =
22 new llvm::symbolize::LLVMSymbolizer();
23 return DefaultSymbolizer;
24 }
25
26 namespace __sanitizer {
27 int internal_snprintf(char *buffer, unsigned long length, const char *format,
28 ...);
29 } // namespace __sanitizer
30
31 extern "C" {
32
33 typedef uint64_t u64;
34
__sanitizer_symbolize_code(const char * ModuleName,uint64_t ModuleOffset,char * Buffer,int MaxLength,bool SymbolizeInlineFrames)35 bool __sanitizer_symbolize_code(const char *ModuleName, uint64_t ModuleOffset,
36 char *Buffer, int MaxLength,
37 bool SymbolizeInlineFrames) {
38 std::string Result;
39 {
40 llvm::raw_string_ostream OS(Result);
41 llvm::symbolize::DIPrinter Printer(OS);
42 // TODO: it is neccessary to set proper SectionIndex here.
43 // object::SectionedAddress::UndefSection works for only absolute addresses.
44 if (SymbolizeInlineFrames) {
45 auto ResOrErr = getDefaultSymbolizer()->symbolizeInlinedCode(
46 ModuleName,
47 {ModuleOffset, llvm::object::SectionedAddress::UndefSection});
48 Printer << (ResOrErr ? ResOrErr.get() : llvm::DIInliningInfo());
49 } else {
50 auto ResOrErr = getDefaultSymbolizer()->symbolizeCode(
51 ModuleName,
52 {ModuleOffset, llvm::object::SectionedAddress::UndefSection});
53 Printer << (ResOrErr ? ResOrErr.get() : llvm::DILineInfo());
54 }
55 }
56 return __sanitizer::internal_snprintf(Buffer, MaxLength, "%s",
57 Result.c_str()) < MaxLength;
58 }
59
__sanitizer_symbolize_data(const char * ModuleName,uint64_t ModuleOffset,char * Buffer,int MaxLength)60 bool __sanitizer_symbolize_data(const char *ModuleName, uint64_t ModuleOffset,
61 char *Buffer, int MaxLength) {
62 std::string Result;
63 {
64 llvm::raw_string_ostream OS(Result);
65 llvm::symbolize::DIPrinter Printer(OS);
66 // TODO: it is neccessary to set proper SectionIndex here.
67 // object::SectionedAddress::UndefSection works for only absolute addresses.
68 auto ResOrErr = getDefaultSymbolizer()->symbolizeData(
69 ModuleName,
70 {ModuleOffset, llvm::object::SectionedAddress::UndefSection});
71 Printer << (ResOrErr ? ResOrErr.get() : llvm::DIGlobal());
72 }
73 return __sanitizer::internal_snprintf(Buffer, MaxLength, "%s",
74 Result.c_str()) < MaxLength;
75 }
76
__sanitizer_symbolize_flush()77 void __sanitizer_symbolize_flush() { getDefaultSymbolizer()->flush(); }
78
__sanitizer_symbolize_demangle(const char * Name,char * Buffer,int MaxLength)79 int __sanitizer_symbolize_demangle(const char *Name, char *Buffer,
80 int MaxLength) {
81 std::string Result =
82 llvm::symbolize::LLVMSymbolizer::DemangleName(Name, nullptr);
83 return __sanitizer::internal_snprintf(Buffer, MaxLength, "%s",
84 Result.c_str()) < MaxLength
85 ? static_cast<int>(Result.size() + 1)
86 : 0;
87 }
88
89 } // extern "C"
90