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/*===- InstrProfiling.c - Support library for PGO instrumentation ---------===*\
|*
|* The LLVM Compiler Infrastructure
|*
|* This file is distributed under the University of Illinois Open Source
|* License. See LICENSE.TXT for details.
|*
\*===----------------------------------------------------------------------===*/
#include "InstrProfiling.h"
/* TODO: Calculate these with linker magic. */
static __llvm_pgo_data *First = NULL;
static __llvm_pgo_data *Last = NULL;
/*!
* \brief Register an instrumented function.
*
* Calls to this are emitted by clang with -fprofile-instr-generate. Such
* calls are only required (and only emitted) on targets where we haven't
* implemented linker magic to find the bounds of the section.
*
* For now, that's all targets.
*/
void __llvm_pgo_register_function(void *Data_) {
/* TODO: Only emit this function if we can't use linker magic. */
__llvm_pgo_data *Data = (__llvm_pgo_data*)Data_;
if (!First || Data < First)
First = Data;
if (!Last || Data >= Last)
Last = Data + 1;
}
/*! \brief Get the first instrumentation record. */
static __llvm_pgo_data *getFirst() {
/* TODO: Use extern + linker magic instead of a static variable. */
return First;
}
/*! \brief Get the last instrumentation record. */
static __llvm_pgo_data *getLast() {
/* TODO: Use extern + linker magic instead of a static variable. */
return Last;
}
/* TODO: void __llvm_pgo_get_size_for_buffer(void); */
static void writeFunction(FILE *OutputFile, const __llvm_pgo_data *Data) {
/* TODO: Requires libc: break requirement by writing directly to a buffer
* instead of a FILE stream.
*/
uint32_t I;
for (I = 0; I < Data->NameSize; ++I)
fputc(Data->Name[I], OutputFile);
fprintf(OutputFile, "\n%" PRIu64 "\n%u\n", Data->FuncHash, Data->NumCounters);
for (I = 0; I < Data->NumCounters; ++I)
fprintf(OutputFile, "%" PRIu64 "\n", Data->Counters[I]);
fprintf(OutputFile, "\n");
}
void __llvm_pgo_write_buffer(FILE *OutputFile) {
/* TODO: Requires libc: break requirement by taking a char* buffer instead of
* a FILE stream.
*/
__llvm_pgo_data *I, *E;
for (I = getFirst(), E = getLast(); I != E; ++I)
writeFunction(OutputFile, I);
}
|
