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 VTableProfData *VTableProfDataFirst = NULL;
  22 static const VTableProfData *VTableProfDataLast = NULL;
  23 static const char *NamesFirst = NULL;
  24 static const char *NamesLast = NULL;
  25 static const char *VNamesFirst = NULL;
  26 static const char *VNamesLast = NULL;
  27 static char *CountersFirst = NULL;
  28 static char *CountersLast = NULL;
  29 static uint32_t *OrderFileFirst = NULL;
  30
  31 static const void *getMinAddr(const void *A1, const void *A2) {
  32   return A1 < A2 ? A1 : A2;
  33 }
  34
  35 static const void *getMaxAddr(const void *A1, const void *A2) {
  36   return A1 > A2 ? A1 : A2;
  37 }
  38
  39 /*!
  40  * \brief Register an instrumented function.
  41  *
  42  * Calls to this are emitted by clang with -fprofile-instr-generate.  Such
  43  * calls are only required (and only emitted) on targets where we haven't
  44  * implemented linker magic to find the bounds of the sections.
  45  */
  46 COMPILER_RT_VISIBILITY
  47 void __llvm_profile_register_function(void *Data_) {
  48   /* TODO: Only emit this function if we can't use linker magic. */
  49   const __llvm_profile_data *Data = (__llvm_profile_data *)Data_;
  50   if (!DataFirst) {
  51     DataFirst = Data;
  52     DataLast = Data + 1;
  53     CountersFirst = (char *)((uintptr_t)Data_ + Data->CounterPtr);
  54     CountersLast =
  55         CountersFirst + Data->NumCounters * __llvm_profile_counter_entry_size();
  56     return;
  57   }
  58
  59   DataFirst = (const __llvm_profile_data *)getMinAddr(DataFirst, Data);
  60   CountersFirst = (char *)getMinAddr(
  61       CountersFirst, (char *)((uintptr_t)Data_ + Data->CounterPtr));
  62
  63   DataLast = (const __llvm_profile_data *)getMaxAddr(DataLast, Data + 1);
  64   CountersLast = (char *)getMaxAddr(
  65       CountersLast,
  66       (char *)((uintptr_t)Data_ + Data->CounterPtr) +
  67           Data->NumCounters * __llvm_profile_counter_entry_size());
  68 }
  69
  70 COMPILER_RT_VISIBILITY
  71 void __llvm_profile_register_names_function(void *NamesStart,
  72                                             uint64_t NamesSize) {
  73   if (!NamesFirst) {
  74     NamesFirst = (const char *)NamesStart;
  75     NamesLast = (const char *)NamesStart + NamesSize;
  76     return;
  77   }
  78   NamesFirst = (const char *)getMinAddr(NamesFirst, NamesStart);
  79   NamesLast =
  80       (const char *)getMaxAddr(NamesLast, (const char *)NamesStart + NamesSize);
  81 }
  82
  83 COMPILER_RT_VISIBILITY
  84 const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
  85 COMPILER_RT_VISIBILITY
  86 const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
  87 COMPILER_RT_VISIBILITY const VTableProfData *
  88 __llvm_profile_begin_vtables(void) {
  89   return VTableProfDataFirst;
  90 }
  91 COMPILER_RT_VISIBILITY const VTableProfData *__llvm_profile_end_vtables(void) {
  92   return VTableProfDataLast;
  93 }
  94 COMPILER_RT_VISIBILITY
  95 const char *__llvm_profile_begin_names(void) { return NamesFirst; }
  96 COMPILER_RT_VISIBILITY
  97 const char *__llvm_profile_end_names(void) { return NamesLast; }
  98 COMPILER_RT_VISIBILITY
  99 const char *__llvm_profile_begin_vtabnames(void) { return VNamesFirst; }
 100 COMPILER_RT_VISIBILITY
 101 const char *__llvm_profile_end_vtabnames(void) { return VNamesLast; }
 102 COMPILER_RT_VISIBILITY
 103 char *__llvm_profile_begin_counters(void) { return CountersFirst; }
 104 COMPILER_RT_VISIBILITY
 105 char *__llvm_profile_end_counters(void) { return CountersLast; }
 106 COMPILER_RT_VISIBILITY
 107 char *__llvm_profile_begin_bitmap(void) { return BitmapFirst; }
 108 COMPILER_RT_VISIBILITY
 109 char *__llvm_profile_end_bitmap(void) { return BitmapLast; }
 110 /* TODO: correctly set up OrderFileFirst. */
 111 COMPILER_RT_VISIBILITY
 112 uint32_t *__llvm_profile_begin_orderfile(void) { return OrderFileFirst; }
 113
 114 COMPILER_RT_VISIBILITY
 115 ValueProfNode *__llvm_profile_begin_vnodes(void) {
 116   return 0;
 117 }
 118 COMPILER_RT_VISIBILITY
 119 ValueProfNode *__llvm_profile_end_vnodes(void) { return 0; }
 120
 121 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
 122 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
 123
 124 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
 125   return 0;
 126 }
 127
 128 #endif