8353a26e85
Split implementation files along a uses-libc/shouldn't-use-libc
boundary.
- InstrProfiling.h is a shared header.
- InstrProfiling.c provides an API to extract profiling data from the
runtime, but avoids the use of libc. Currently this is a lie:
__llvm_pgo_write_buffer() uses `FILE*` and related functions. It
will be updated soon to write to a `char*` buffer instead.
- InstrProfilingExtras.c provides a more convenient API for
interfacing with the profiling runtime, but has logic that does (and
will continue to) use libc.
<rdar://problem/15943240>
llvm-svn: 204268
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*===- InstrProfilingExtras.c - Support library for PGO instrumentation ---===*\
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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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#include "InstrProfiling.h"
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/*! \brief Write instrumentation data to the given file. */
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void __llvm_pgo_write_file(const char *OutputName) {
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/* TODO: Requires libc: move to separate translation unit. */
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FILE *OutputFile;
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if (!OutputName || !OutputName[0])
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return;
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OutputFile = fopen(OutputName, "w");
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if (!OutputFile) return;
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/* TODO: mmap file to buffer of size __llvm_pgo_get_size_for_buffer() and
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* pass the buffer in, instead of the file.
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*/
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__llvm_pgo_write_buffer(OutputFile);
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fclose(OutputFile);
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}
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/*! \brief Write instrumentation data to the default file. */
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void __llvm_pgo_write_default_file() {
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/* TODO: Requires libc: move to separate translation unit. */
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const char *OutputName = getenv("LLVM_PROFILE_FILE");
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if (OutputName == NULL || OutputName[0] == '\0')
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OutputName = "default.profdata";
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__llvm_pgo_write_file(OutputName);
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}
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/*!
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* \brief Register to write instrumentation data to the default file at exit.
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*/
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void __llvm_pgo_register_write_atexit() {
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/* TODO: Requires libc: move to separate translation unit. */
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static int HasBeenRegistered = 0;
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if (!HasBeenRegistered) {
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HasBeenRegistered = 1;
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atexit(__llvm_pgo_write_default_file);
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}
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}
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