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      1 /*===- InstrProfilingBuffer.c - Write instrumentation to a memory buffer --===*\
      2 |*
      3 |*                     The LLVM Compiler Infrastructure
      4 |*
      5 |* This file is distributed under the University of Illinois Open Source
      6 |* License. See LICENSE.TXT for details.
      7 |*
      8 \*===----------------------------------------------------------------------===*/
      9 
     10 #include "InstrProfiling.h"
     11 #include "InstrProfilingInternal.h"
     12 
     13 COMPILER_RT_VISIBILITY
     14 uint64_t __llvm_profile_get_size_for_buffer(void) {
     15   const __llvm_profile_data *DataBegin = __llvm_profile_begin_data();
     16   const __llvm_profile_data *DataEnd = __llvm_profile_end_data();
     17   const uint64_t *CountersBegin = __llvm_profile_begin_counters();
     18   const uint64_t *CountersEnd = __llvm_profile_end_counters();
     19   const char *NamesBegin = __llvm_profile_begin_names();
     20   const char *NamesEnd = __llvm_profile_end_names();
     21 
     22   return __llvm_profile_get_size_for_buffer_internal(
     23       DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd);
     24 }
     25 
     26 #define PROFILE_RANGE_SIZE(Range) (Range##End - Range##Begin)
     27 
     28 COMPILER_RT_VISIBILITY
     29 uint64_t __llvm_profile_get_size_for_buffer_internal(
     30     const __llvm_profile_data *DataBegin, const __llvm_profile_data *DataEnd,
     31     const uint64_t *CountersBegin, const uint64_t *CountersEnd,
     32     const char *NamesBegin, const char *NamesEnd) {
     33   /* Match logic in __llvm_profile_write_buffer(). */
     34   const uint64_t NamesSize = PROFILE_RANGE_SIZE(Names) * sizeof(char);
     35   const uint8_t Padding = __llvm_profile_get_num_padding_bytes(NamesSize);
     36   return sizeof(__llvm_profile_header) +
     37          PROFILE_RANGE_SIZE(Data) * sizeof(__llvm_profile_data) +
     38          PROFILE_RANGE_SIZE(Counters) * sizeof(uint64_t) + NamesSize + Padding;
     39 }
     40 
     41 COMPILER_RT_VISIBILITY int __llvm_profile_write_buffer(char *Buffer) {
     42   return llvmWriteProfData(llvmBufferWriter, Buffer, 0, 0);
     43 }
     44 
     45 COMPILER_RT_VISIBILITY int __llvm_profile_write_buffer_internal(
     46     char *Buffer, const __llvm_profile_data *DataBegin,
     47     const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin,
     48     const uint64_t *CountersEnd, const char *NamesBegin, const char *NamesEnd) {
     49   return llvmWriteProfDataImpl(llvmBufferWriter, Buffer, DataBegin, DataEnd,
     50                                CountersBegin, CountersEnd, 0, 0, NamesBegin,
     51                                NamesEnd);
     52 }
     53