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563627eb7b
This stack of changes introduces `llvm-profgen` utility which generates a profile data file from given perf script data files for sample-based PGO. It’s part of(not only) the CSSPGO work. Specifically to support context-sensitive with/without pseudo probe profile, it implements a series of functionalities including perf trace parsing, instruction symbolization, LBR stack/call frame stack unwinding, pseudo probe decoding, etc. Also high throughput is achieved by multiple levels of sample aggregation and compatible format with one stop is generated at the end. Please refer to: https://groups.google.com/g/llvm-dev/c/1p1rdYbL93s for the CSSPGO RFC. This change enables disassembling the text sections to build various address maps that are potentially used by the virtual unwinder. A switch `--show-disassembly` is being added to print the disassembly code. Like the llvm-objdump tool, this change leverages existing LLVM components to parse and disassemble ELF binary files. So far X86 is supported. Test Plan: ninja check-llvm Reviewed By: wmi, wenlei Differential Revision: https://reviews.llvm.org/D89712
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
//===-- ErrorHandling.h - Error handler -------------------------*- C++ -*-===//
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//
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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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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_PROFGEN_ERRORHANDLING_H
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#define LLVM_TOOLS_LLVM_PROFGEN_ERRORHANDLING_H
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/ErrorOr.h"
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#include "llvm/Support/WithColor.h"
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#include <system_error>
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using namespace llvm;
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LLVM_ATTRIBUTE_NORETURN inline void
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exitWithError(const Twine &Message, StringRef Whence = StringRef(),
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StringRef Hint = StringRef()) {
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WithColor::error(errs(), "llvm-profgen");
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if (!Whence.empty())
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errs() << Whence.str() << ": ";
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errs() << Message << "\n";
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if (!Hint.empty())
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WithColor::note() << Hint.str() << "\n";
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::exit(EXIT_FAILURE);
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}
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LLVM_ATTRIBUTE_NORETURN inline void
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exitWithError(std::error_code EC, StringRef Whence = StringRef()) {
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exitWithError(EC.message(), Whence);
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}
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LLVM_ATTRIBUTE_NORETURN inline void exitWithError(Error E, StringRef Whence) {
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exitWithError(errorToErrorCode(std::move(E)), Whence);
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}
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template <typename T, typename... Ts>
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T unwrapOrError(Expected<T> EO, Ts &&... Args) {
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if (EO)
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return std::move(*EO);
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exitWithError(EO.takeError(), std::forward<Ts>(Args)...);
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}
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#endif
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