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     !defined(__wasm__) && !defined(__HAIKU__)
  13
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16
  17 #include "InstrProfiling.h"
  18 #include "InstrProfilingInternal.h"
  19
  20 static const __llvm_profile_data *DataFirst = NULL;
  21 static const __llvm_profile_data *DataLast = NULL;
  22 static const VTableProfData *VTableProfDataFirst = NULL;
  23 static const VTableProfData *VTableProfDataLast = NULL;
  24 static const char *NamesFirst = NULL;
  25 static const char *NamesLast = NULL;
  26 static const char *VNamesFirst = NULL;
  27 static const char *VNamesLast = NULL;
  28 static char *CountersFirst = NULL;
  29 static char *CountersLast = NULL;
  30 static uint32_t *OrderFileFirst = NULL;
  31
  32 static const void *getMinAddr(const void *A1, const void *A2) {
  33   return A1 < A2 ? A1 : A2;
  34 }
  35
  36 static const void *getMaxAddr(const void *A1, const void *A2) {
  37   return A1 > A2 ? A1 : A2;
  38 }
  39
  40 /*!
  41  * \brief Register an instrumented function.
  42  *
  43  * Calls to this are emitted by clang with -fprofile-instr-generate.  Such
  44  * calls are only required (and only emitted) on targets where we haven't
  45  * implemented linker magic to find the bounds of the sections.
  46  */
  47 COMPILER_RT_VISIBILITY
  48 void __llvm_profile_register_function(void *Data_) {
  49   /* TODO: Only emit this function if we can't use linker magic. */
  50   const __llvm_profile_data *Data = (__llvm_profile_data *)Data_;
  51   if (!DataFirst) {
  52     DataFirst = Data;
  53     DataLast = Data + 1;
  54     CountersFirst = (char *)((uintptr_t)Data_ + Data->CounterPtr);
  55     CountersLast =
  56         CountersFirst + Data->NumCounters * __llvm_profile_counter_entry_size();
  57     return;
  58   }
  59
  60   DataFirst = (const __llvm_profile_data *)getMinAddr(DataFirst, Data);
  61   CountersFirst = (char *)getMinAddr(
  62       CountersFirst, (char *)((uintptr_t)Data_ + Data->CounterPtr));
  63
  64   DataLast = (const __llvm_profile_data *)getMaxAddr(DataLast, Data + 1);
  65   CountersLast = (char *)getMaxAddr(
  66       CountersLast,
  67       (char *)((uintptr_t)Data_ + Data->CounterPtr) +
  68           Data->NumCounters * __llvm_profile_counter_entry_size());
  69 }
  70
  71 COMPILER_RT_VISIBILITY
  72 void __llvm_profile_register_names_function(void *NamesStart,
  73                                             uint64_t NamesSize) {
  74   if (!NamesFirst) {
  75     NamesFirst = (const char *)NamesStart;
  76     NamesLast = (const char *)NamesStart + NamesSize;
  77     return;
  78   }
  79   NamesFirst = (const char *)getMinAddr(NamesFirst, NamesStart);
  80   NamesLast =
  81       (const char *)getMaxAddr(NamesLast, (const char *)NamesStart + NamesSize);
  82 }
  83
  84 COMPILER_RT_VISIBILITY
  85 const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
  86 COMPILER_RT_VISIBILITY
  87 const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
  88 COMPILER_RT_VISIBILITY const VTableProfData *
  89 __llvm_profile_begin_vtables(void) {
  90   return VTableProfDataFirst;
  91 }
  92 COMPILER_RT_VISIBILITY const VTableProfData *__llvm_profile_end_vtables(void) {
  93   return VTableProfDataLast;
  94 }
  95 COMPILER_RT_VISIBILITY
  96 const char *__llvm_profile_begin_names(void) { return NamesFirst; }
  97 COMPILER_RT_VISIBILITY
  98 const char *__llvm_profile_end_names(void) { return NamesLast; }
  99 COMPILER_RT_VISIBILITY
 100 const char *__llvm_profile_begin_vtabnames(void) { return VNamesFirst; }
 101 COMPILER_RT_VISIBILITY
 102 const char *__llvm_profile_end_vtabnames(void) { return VNamesLast; }
 103 COMPILER_RT_VISIBILITY
 104 char *__llvm_profile_begin_counters(void) { return CountersFirst; }
 105 COMPILER_RT_VISIBILITY
 106 char *__llvm_profile_end_counters(void) { return CountersLast; }
 107 COMPILER_RT_VISIBILITY
 108 char *__llvm_profile_begin_bitmap(void) { return BitmapFirst; }
 109 COMPILER_RT_VISIBILITY
 110 char *__llvm_profile_end_bitmap(void) { return BitmapLast; }
 111 /* TODO: correctly set up OrderFileFirst. */
 112 COMPILER_RT_VISIBILITY
 113 uint32_t *__llvm_profile_begin_orderfile(void) { return OrderFileFirst; }
 114
 115 COMPILER_RT_VISIBILITY
 116 ValueProfNode *__llvm_profile_begin_vnodes(void) {
 117   return 0;
 118 }
 119 COMPILER_RT_VISIBILITY
 120 ValueProfNode *__llvm_profile_end_vnodes(void) { return 0; }
 121
 122 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
 123 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
 124
 125 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
 126   return 0;
 127 }
 128
 129 #endif