55e4d66f0c
Shared objects are hard. After this commit, we do the right thing when
profiling two separate shared objects that have been dlopen'd with
`RTLD_LOCAL`, when the main executable is *not* being profiled.
This mainly simplifies the writer logic.
- At initialization, determine the output filename and truncate the
file. Depending on whether shared objects can see each other, this
may happen multiple times.
- At exit, each executable writes its own profile in append mode.
<rdar://problem/16918688>
llvm-svn: 209053
31 lines
650 B
C++
31 lines
650 B
C++
//===- InstrProfilingRuntime.cpp - PGO runtime initialization -------------===//
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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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extern "C" {
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#include "InstrProfiling.h"
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__attribute__((visibility("hidden"))) int __llvm_profile_runtime;
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}
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namespace {
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class RegisterRuntime {
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public:
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RegisterRuntime() {
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__llvm_profile_register_write_file_atexit();
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__llvm_profile_initialize_file();
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}
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};
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RegisterRuntime Registration;
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}
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