1 /*===- InstrProfilingPlatformOther.c - Profile data default platform ------===*\ 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 12 #if !defined(__APPLE__) 13 #include <stdlib.h> 14 15 static const __llvm_profile_data *DataFirst = NULL; 16 static const __llvm_profile_data *DataLast = NULL; 17 static const char *NamesFirst = NULL; 18 static const char *NamesLast = NULL; 19 static uint64_t *CountersFirst = NULL; 20 static uint64_t *CountersLast = NULL; 21 22 /*! 23 * \brief Register an instrumented function. 24 * 25 * Calls to this are emitted by clang with -fprofile-instr-generate. Such 26 * calls are only required (and only emitted) on targets where we haven't 27 * implemented linker magic to find the bounds of the sections. 28 */ 29 __attribute__((visibility("hidden"))) __llvm_profile_register_function(void * Data_)30void __llvm_profile_register_function(void *Data_) { 31 /* TODO: Only emit this function if we can't use linker magic. */ 32 const __llvm_profile_data *Data = (__llvm_profile_data*)Data_; 33 if (!DataFirst) { 34 DataFirst = Data; 35 DataLast = Data + 1; 36 NamesFirst = Data->Name; 37 NamesLast = Data->Name + Data->NameSize; 38 CountersFirst = Data->Counters; 39 CountersLast = Data->Counters + Data->NumCounters; 40 return; 41 } 42 43 #define UPDATE_FIRST(First, New) \ 44 First = New < First ? New : First 45 UPDATE_FIRST(DataFirst, Data); 46 UPDATE_FIRST(NamesFirst, Data->Name); 47 UPDATE_FIRST(CountersFirst, Data->Counters); 48 #undef UPDATE_FIRST 49 50 #define UPDATE_LAST(Last, New) \ 51 Last = New > Last ? New : Last 52 UPDATE_LAST(DataLast, Data + 1); 53 UPDATE_LAST(NamesLast, Data->Name + Data->NameSize); 54 UPDATE_LAST(CountersLast, Data->Counters + Data->NumCounters); 55 #undef UPDATE_LAST 56 } 57 58 __attribute__((visibility("hidden"))) __llvm_profile_data_begin(void)59const __llvm_profile_data *__llvm_profile_data_begin(void) { 60 return DataFirst; 61 } 62 __attribute__((visibility("hidden"))) __llvm_profile_data_end(void)63const __llvm_profile_data *__llvm_profile_data_end(void) { 64 return DataLast; 65 } 66 __attribute__((visibility("hidden"))) __llvm_profile_names_begin(void)67const char *__llvm_profile_names_begin(void) { return NamesFirst; } 68 __attribute__((visibility("hidden"))) __llvm_profile_names_end(void)69const char *__llvm_profile_names_end(void) { return NamesLast; } 70 __attribute__((visibility("hidden"))) __llvm_profile_counters_begin(void)71uint64_t *__llvm_profile_counters_begin(void) { return CountersFirst; } 72 __attribute__((visibility("hidden"))) __llvm_profile_counters_end(void)73uint64_t *__llvm_profile_counters_end(void) { return CountersLast; } 74 #endif 75