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4031e4b95d
Summary: Adds a CMake check for whether the compiler used to build the XRay library supports XRay-instrumentation. If the compiler we're using does support the `-fxray-instrument` flag (i.e. recently-built Clang), we define the XRAY_NEVER_INSTRUMENT macro that then makes sure that the XRay runtime functions never get XRay-instrumented. This prevents potential weirdness involved with building the XRay library with a Clang that supports XRay-instrumentation, and is attempting to XRay-instrument the build of compiler-rt. Reviewers: majnemer, rSerge, echristo Subscribers: mehdi_amini, llvm-commits, mgorny Differential Revision: https://reviews.llvm.org/D26597 llvm-svn: 287068
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
//===-- xray_flags.cc -------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of XRay, a dynamic runtime instrumentation system.
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//
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// XRay flag parsing logic.
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//===----------------------------------------------------------------------===//
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#include "xray_flags.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_flag_parser.h"
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#include "sanitizer_common/sanitizer_libc.h"
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#include "xray_defs.h"
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using namespace __sanitizer;
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namespace __xray {
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Flags xray_flags_dont_use_directly; // use via flags().
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void Flags::SetDefaults() XRAY_NEVER_INSTRUMENT {
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#define XRAY_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
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#include "xray_flags.inc"
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#undef XRAY_FLAG
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}
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static void RegisterXRayFlags(FlagParser *P, Flags *F) XRAY_NEVER_INSTRUMENT {
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#define XRAY_FLAG(Type, Name, DefaultValue, Description) \
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RegisterFlag(P, #Name, Description, &F->Name);
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#include "xray_flags.inc"
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#undef XRAY_FLAG
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}
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void InitializeFlags() XRAY_NEVER_INSTRUMENT {
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SetCommonFlagsDefaults();
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auto *F = flags();
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F->SetDefaults();
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FlagParser XRayParser;
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RegisterXRayFlags(&XRayParser, F);
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RegisterCommonFlags(&XRayParser);
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// Override from command line.
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XRayParser.ParseString(GetEnv("XRAY_OPTIONS"));
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InitializeCommonFlags();
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if (Verbosity())
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ReportUnrecognizedFlags();
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if (common_flags()->help) {
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XRayParser.PrintFlagDescriptions();
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}
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}
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} // namespace __xray
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