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/*===- InstrProfilingWriter.c - Write instrumentation to a file or buffer -===*\
|*
|* The LLVM Compiler Infrastructure
|*
|* This file is distributed under the University of Illinois Open Source
|* License. See LICENSE.TXT for details.
|*
\*===----------------------------------------------------------------------===*/
#include "InstrProfiling.h"
#include "InstrProfilingInternal.h"
__attribute__((visibility("hidden"))) int
llvmWriteProfData(void *BufferOrFile, const uint8_t *ValueDataBegin,
const uint64_t ValueDataSize, WriterCallback Writer) {
/* Match logic in __llvm_profile_write_buffer(). */
const __llvm_profile_data *DataBegin = __llvm_profile_begin_data();
const __llvm_profile_data *DataEnd = __llvm_profile_end_data();
const uint64_t *CountersBegin = __llvm_profile_begin_counters();
const uint64_t *CountersEnd = __llvm_profile_end_counters();
const char *NamesBegin = __llvm_profile_begin_names();
const char *NamesEnd = __llvm_profile_end_names();
return llvmWriteProfDataImpl(BufferOrFile, Writer, DataBegin, DataEnd,
CountersBegin, CountersEnd, ValueDataBegin,
ValueDataSize, NamesBegin, NamesEnd);
}
__attribute__((visibility("hidden"))) int llvmWriteProfDataImpl(
void *BufferOrFile, WriterCallback Writer,
const __llvm_profile_data *DataBegin, const __llvm_profile_data *DataEnd,
const uint64_t *CountersBegin, const uint64_t *CountersEnd,
const uint8_t *ValueDataBegin, const uint64_t ValueDataSize,
const char *NamesBegin, const char *NamesEnd) {
/* Calculate size of sections. */
const uint64_t DataSize = DataEnd - DataBegin;
const uint64_t CountersSize = CountersEnd - CountersBegin;
const uint64_t NamesSize = NamesEnd - NamesBegin;
const uint64_t Padding = __llvm_profile_get_num_padding_bytes(NamesSize);
/* Enough zeroes for padding. */
const char Zeroes[sizeof(uint64_t)] = {0};
/* Create the header. */
__llvm_profile_header Header;
if (!DataSize)
return 0;
Header.Magic = __llvm_profile_get_magic();
Header.Version = __llvm_profile_get_version();
Header.DataSize = DataSize;
Header.CountersSize = CountersSize;
Header.NamesSize = NamesSize;
Header.CountersDelta = (uintptr_t)CountersBegin;
Header.NamesDelta = (uintptr_t)NamesBegin;
Header.ValueKindLast = VK_LAST;
Header.ValueDataSize = ValueDataSize;
Header.ValueDataDelta = (uintptr_t)ValueDataBegin;
/* Write the data. */
#define CHECK_write(Data, Size, Length, BuffOrFile) \
do { \
if (Writer(Data, Size, Length, &BuffOrFile) != Length) \
return -1; \
} while (0)
CHECK_write(&Header, sizeof(__llvm_profile_header), 1, BufferOrFile);
CHECK_write(DataBegin, sizeof(__llvm_profile_data), DataSize, BufferOrFile);
CHECK_write(CountersBegin, sizeof(uint64_t), CountersSize, BufferOrFile);
CHECK_write(NamesBegin, sizeof(char), NamesSize, BufferOrFile);
CHECK_write(Zeroes, sizeof(char), Padding, BufferOrFile);
if (ValueDataBegin)
CHECK_write(ValueDataBegin, sizeof(char), ValueDataSize, BufferOrFile);
#undef CHECK_write
return 0;
}
|
