cfd7eec3d8
Summary: This is part of the larger XRay Profiling Mode effort. This patch implements the wiring required to enable us to actually select the `xray-profiling` mode, and install the handlers to start measuring the time and frequency of the function calls in call stacks. The current way to get the profile information is by working with the XRay API to `__xray_process_buffers(...)`. In subsequent changes we'll implement profile saving to files, similar to how the FDR and basic modes operate, as well as means for converting this format into those that can be loaded/visualised as flame graphs. We will also be extending the accounting tool in LLVM to support stack-based function call accounting. We also continue with the implementation to support building small histograms of latencies for the `FunctionCallTrie::Node` type, to allow us to actually approximate the distribution of latencies per function. Depends on D45758 and D46998. Reviewers: eizan, kpw, pelikan Reviewed By: kpw Subscribers: llvm-commits, mgorny Differential Revision: https://reviews.llvm.org/D44620 llvm-svn: 334469
40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
//===-- xray_profiling_flags.h ----------------------------------*- 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 profiling runtime flags.
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//===----------------------------------------------------------------------===//
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#ifndef XRAY_PROFILER_FLAGS_H
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#define XRAY_PROFILER_FLAGS_H
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#include "sanitizer_common/sanitizer_flag_parser.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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namespace __xray {
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struct ProfilerFlags {
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#define XRAY_FLAG(Type, Name, DefaultValue, Description) Type Name;
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#include "xray_profiling_flags.inc"
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#undef XRAY_FLAG
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void setDefaults();
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};
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extern ProfilerFlags xray_profiling_flags_dont_use_directly;
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inline ProfilerFlags *profilingFlags() {
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return &xray_profiling_flags_dont_use_directly;
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}
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void registerProfilerFlags(FlagParser *P, ProfilerFlags *F);
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} // namespace __xray
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#endif // XRAY_PROFILER_FLAGS_H
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