compiler-rt/lib/profile/InstrProfilingPlatformOther.c

   1 /*===- InstrProfilingPlatformOther.c - Profile data default platform ------===*\
   2 |*
   3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 |* See https://llvm.org/LICENSE.txt for license information.
   5 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 |*
   7 \*===----------------------------------------------------------------------===*/
   8
   9 #if !defined(__APPLE__) && !defined(__linux__) && !defined(__FreeBSD__) &&     \
  10     !defined(__Fuchsia__) && !(defined(__sun__) && defined(__svr4__)) &&       \
  11     !defined(__NetBSD__) && !defined(_WIN32) && !defined(_AIX)
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15
  16 #include "InstrProfiling.h"
  17 #include "InstrProfilingInternal.h"
  18
  19 static const __llvm_profile_data *DataFirst = NULL;
  20 static const __llvm_profile_data *DataLast = NULL;
  21 static const char *NamesFirst = NULL;
  22 static const char *NamesLast = NULL;
  23 static char *CountersFirst = NULL;
  24 static char *CountersLast = NULL;
  25 static uint32_t *OrderFileFirst = NULL;
  26
  27 static const void *getMinAddr(const void *A1, const void *A2) {
  28   return A1 < A2 ? A1 : A2;
  29 }
  30
  31 static const void *getMaxAddr(const void *A1, const void *A2) {
  32   return A1 > A2 ? A1 : A2;
  33 }
  34
  35 /*!
  36  * \brief Register an instrumented function.
  37  *
  38  * Calls to this are emitted by clang with -fprofile-instr-generate.  Such
  39  * calls are only required (and only emitted) on targets where we haven't
  40  * implemented linker magic to find the bounds of the sections.
  41  */
  42 COMPILER_RT_VISIBILITY
  43 void __llvm_profile_register_function(void *Data_) {
  44   /* TODO: Only emit this function if we can't use linker magic. */
  45   const __llvm_profile_data *Data = (__llvm_profile_data *)Data_;
  46   if (!DataFirst) {
  47     DataFirst = Data;
  48     DataLast = Data + 1;
  49     CountersFirst = (char *)((uintptr_t)Data_ + Data->CounterPtr);
  50     CountersLast =
  51         CountersFirst + Data->NumCounters * __llvm_profile_counter_entry_size();
  52     return;
  53   }
  54
  55   DataFirst = (const __llvm_profile_data *)getMinAddr(DataFirst, Data);
  56   CountersFirst = (char *)getMinAddr(
  57       CountersFirst, (char *)((uintptr_t)Data_ + Data->CounterPtr));
  58
  59   DataLast = (const __llvm_profile_data *)getMaxAddr(DataLast, Data + 1);
  60   CountersLast = (char *)getMaxAddr(
  61       CountersLast,
  62       (char *)((uintptr_t)Data_ + Data->CounterPtr) +
  63           Data->NumCounters * __llvm_profile_counter_entry_size());
  64 }
  65
  66 COMPILER_RT_VISIBILITY
  67 void __llvm_profile_register_names_function(void *NamesStart,
  68                                             uint64_t NamesSize) {
  69   if (!NamesFirst) {
  70     NamesFirst = (const char *)NamesStart;
  71     NamesLast = (const char *)NamesStart + NamesSize;
  72     return;
  73   }
  74   NamesFirst = (const char *)getMinAddr(NamesFirst, NamesStart);
  75   NamesLast =
  76       (const char *)getMaxAddr(NamesLast, (const char *)NamesStart + NamesSize);
  77 }
  78
  79 COMPILER_RT_VISIBILITY
  80 const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
  81 COMPILER_RT_VISIBILITY
  82 const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
  83 COMPILER_RT_VISIBILITY
  84 const char *__llvm_profile_begin_names(void) { return NamesFirst; }
  85 COMPILER_RT_VISIBILITY
  86 const char *__llvm_profile_end_names(void) { return NamesLast; }
  87 COMPILER_RT_VISIBILITY
  88 char *__llvm_profile_begin_counters(void) { return CountersFirst; }
  89 COMPILER_RT_VISIBILITY
  90 char *__llvm_profile_end_counters(void) { return CountersLast; }
  91 /* TODO: correctly set up OrderFileFirst. */
  92 COMPILER_RT_VISIBILITY
  93 uint32_t *__llvm_profile_begin_orderfile(void) { return OrderFileFirst; }
  94
  95 COMPILER_RT_VISIBILITY
  96 ValueProfNode *__llvm_profile_begin_vnodes(void) {
  97   return 0;
  98 }
  99 COMPILER_RT_VISIBILITY
 100 ValueProfNode *__llvm_profile_end_vnodes(void) { return 0; }
 101
 102 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
 103 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
 104
 105 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
 106   return 0;
 107 }
 108
 109 #endif