forked from OSchip/llvm-project
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/*===- InstrProfilingBuffer.c - Write instrumentation to a memory buffer --===*\
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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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#include <string.h>
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uint64_t __llvm_profile_get_size_for_buffer(void) {
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/* Match logic in __llvm_profile_write_buffer(). */
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return sizeof(uint64_t) * PROFILE_HEADER_SIZE +
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PROFILE_RANGE_SIZE(data) * sizeof(__llvm_profile_data) +
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PROFILE_RANGE_SIZE(counters) * sizeof(uint64_t) +
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PROFILE_RANGE_SIZE(names) * sizeof(char);
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}
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int __llvm_profile_write_buffer(char *Buffer) {
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/* Match logic in __llvm_profile_get_size_for_buffer().
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* Match logic in __llvm_profile_write_file().
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*/
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const __llvm_profile_data *DataBegin = __llvm_profile_data_begin();
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const __llvm_profile_data *DataEnd = __llvm_profile_data_end();
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const uint64_t *CountersBegin = __llvm_profile_counters_begin();
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const uint64_t *CountersEnd = __llvm_profile_counters_end();
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const char *NamesBegin = __llvm_profile_names_begin();
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const char *NamesEnd = __llvm_profile_names_end();
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/* Calculate size of sections. */
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const uint64_t DataSize = DataEnd - DataBegin;
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const uint64_t CountersSize = CountersEnd - CountersBegin;
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const uint64_t NamesSize = NamesEnd - NamesBegin;
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/* Create the header. */
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uint64_t Header[PROFILE_HEADER_SIZE] = {
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__llvm_profile_get_magic(),
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__llvm_profile_get_version(),
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DataSize,
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CountersSize,
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NamesSize,
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(uintptr_t)CountersBegin,
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(uintptr_t)NamesBegin
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};
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/* Write the data. */
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#define UPDATE_memcpy(Data, Size) \
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do { \
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memcpy(Buffer, Data, Size); \
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Buffer += Size; \
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} while (0)
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UPDATE_memcpy(Header, PROFILE_HEADER_SIZE * sizeof(uint64_t));
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UPDATE_memcpy(DataBegin, DataSize * sizeof(__llvm_profile_data));
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UPDATE_memcpy(CountersBegin, CountersSize * sizeof(uint64_t));
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UPDATE_memcpy(NamesBegin, NamesSize * sizeof(char));
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#undef UPDATE_memcpy
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return 0;
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}
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