2016-01-16 08:31:11 +08:00
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//===- sanstats.cpp - Sanitizer statistics dumper -------------------------===//
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//
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2019-01-19 16:50:56 +08:00
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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2016-01-16 08:31:11 +08:00
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//
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//===----------------------------------------------------------------------===//
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//
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// This tool dumps statistics information from files in the format produced
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// by clang's -fsanitize-stats feature.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/Symbolize/Symbolize.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorOr.h"
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2018-11-27 05:48:55 +08:00
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#include "llvm/Support/FileSystem.h"
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2016-01-16 08:31:11 +08:00
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#include "llvm/Support/MemoryBuffer.h"
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2018-11-27 05:48:55 +08:00
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#include "llvm/Support/Path.h"
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2016-01-16 08:31:11 +08:00
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#include "llvm/Transforms/Utils/SanitizerStats.h"
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2016-04-06 04:45:04 +08:00
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#include <stdint.h>
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2016-01-16 08:31:11 +08:00
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using namespace llvm;
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2016-04-06 04:45:04 +08:00
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static cl::opt<std::string> ClInputFile(cl::Positional, cl::Required,
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cl::desc("<filename>"));
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2016-01-16 08:31:11 +08:00
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2016-04-06 04:45:04 +08:00
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static cl::opt<bool> ClDemangle("demangle", cl::init(false),
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cl::desc("Print demangled function name."));
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2016-01-16 08:31:11 +08:00
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inline uint64_t KindFromData(uint64_t Data, char SizeofPtr) {
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return Data >> (SizeofPtr * 8 - kSanitizerStatKindBits);
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}
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inline uint64_t CountFromData(uint64_t Data, char SizeofPtr) {
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return Data & ((1ull << (SizeofPtr * 8 - kSanitizerStatKindBits)) - 1);
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}
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uint64_t ReadLE(char Size, const char *Begin, const char *End) {
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uint64_t Result = 0;
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char Pos = 0;
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while (Begin < End && Pos != Size) {
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Result |= uint64_t(uint8_t(*Begin)) << (Pos * 8);
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++Begin;
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++Pos;
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}
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return Result;
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}
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const char *ReadModule(char SizeofPtr, const char *Begin, const char *End) {
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const char *FilenameBegin = Begin;
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while (Begin != End && *Begin)
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++Begin;
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if (Begin == End)
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2016-01-27 02:48:36 +08:00
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return nullptr;
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2018-11-27 05:48:55 +08:00
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std::string Filename(FilenameBegin, Begin - FilenameBegin);
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if (!llvm::sys::fs::exists(Filename))
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Filename = std::string(llvm::sys::path::parent_path(ClInputFile)) +
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std::string(llvm::sys::path::filename(Filename));
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2016-01-16 08:31:11 +08:00
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++Begin;
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if (Begin == End)
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2016-01-27 02:48:36 +08:00
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return nullptr;
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2016-01-16 08:31:11 +08:00
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symbolize::LLVMSymbolizer::Options SymbolizerOptions;
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SymbolizerOptions.Demangle = ClDemangle;
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SymbolizerOptions.UseSymbolTable = true;
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symbolize::LLVMSymbolizer Symbolizer(SymbolizerOptions);
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2016-04-06 04:45:04 +08:00
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while (1) {
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2016-01-16 08:31:11 +08:00
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uint64_t Addr = ReadLE(SizeofPtr, Begin, End);
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Begin += SizeofPtr;
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uint64_t Data = ReadLE(SizeofPtr, Begin, End);
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Begin += SizeofPtr;
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if (Begin > End)
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2016-01-27 02:48:36 +08:00
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return nullptr;
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2016-01-16 08:31:11 +08:00
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if (Addr == 0 && Data == 0)
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return Begin;
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if (Begin == End)
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2016-01-27 02:48:36 +08:00
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return nullptr;
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2016-01-16 08:31:11 +08:00
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2017-07-13 08:49:03 +08:00
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// As the instrumentation tracks the return address and not
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2017-09-12 08:19:11 +08:00
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// the address of the call to `__sanitizer_stat_report` we
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2017-07-13 08:49:03 +08:00
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// remove one from the address to get the correct DI.
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2019-02-27 21:17:36 +08:00
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// TODO: it would be neccessary to set proper section index here.
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// object::SectionedAddress::UndefSection works for only absolute addresses.
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if (Expected<DILineInfo> LineInfo = Symbolizer.symbolizeCode(
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Filename, {Addr - 1, object::SectionedAddress::UndefSection})) {
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2018-11-27 05:48:45 +08:00
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llvm::outs() << format_hex(Addr - 1, 18) << ' ' << LineInfo->FileName
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<< ':' << LineInfo->Line << ' ' << LineInfo->FunctionName
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<< ' ';
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2016-01-16 08:31:11 +08:00
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} else {
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2016-06-04 04:25:09 +08:00
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logAllUnhandledErrors(LineInfo.takeError(), llvm::outs(), "<error> ");
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2016-01-16 08:31:11 +08:00
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}
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switch (KindFromData(Data, SizeofPtr)) {
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case SanStat_CFI_VCall:
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llvm::outs() << "cfi-vcall";
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break;
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case SanStat_CFI_NVCall:
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llvm::outs() << "cfi-nvcall";
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break;
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case SanStat_CFI_DerivedCast:
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llvm::outs() << "cfi-derived-cast";
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break;
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case SanStat_CFI_UnrelatedCast:
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llvm::outs() << "cfi-unrelated-cast";
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break;
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case SanStat_CFI_ICall:
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llvm::outs() << "cfi-icall";
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break;
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default:
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llvm::outs() << "<unknown>";
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break;
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}
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llvm::outs() << " " << CountFromData(Data, SizeofPtr) << '\n';
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}
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}
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int main(int argc, char **argv) {
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cl::ParseCommandLineOptions(argc, argv,
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"Sanitizer Statistics Processing Tool");
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ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr =
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MemoryBuffer::getFile(ClInputFile, -1, false);
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if (!MBOrErr) {
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errs() << argv[0] << ": " << ClInputFile << ": "
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<< MBOrErr.getError().message() << '\n';
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return 1;
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}
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std::unique_ptr<MemoryBuffer> MB = std::move(MBOrErr.get());
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const char *Begin = MB->getBufferStart(), *End = MB->getBufferEnd();
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if (Begin == End) {
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errs() << argv[0] << ": " << ClInputFile << ": short read\n";
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return 1;
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}
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char SizeofPtr = *Begin++;
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while (Begin != End) {
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Begin = ReadModule(SizeofPtr, Begin, End);
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2016-01-27 02:48:36 +08:00
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if (Begin == nullptr) {
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2016-01-16 08:31:11 +08:00
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errs() << argv[0] << ": " << ClInputFile << ": short read\n";
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return 1;
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}
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assert(Begin <= End);
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}
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}
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