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__) && !defined(__linux__) && !defined(__FreeBSD__)
13 
14 #include <stdlib.h>
15 
16 static const __llvm_profile_data *DataFirst = NULL;
17 static const __llvm_profile_data *DataLast = NULL;
18 static const char *NamesFirst = NULL;
19 static const char *NamesLast = NULL;
20 static uint64_t *CountersFirst = NULL;
21 static uint64_t *CountersLast = NULL;
22 
23 static const void *getMinAddr(const void *A1, const void *A2) {
24   return A1 < A2 ? A1 : A2;
25 }
26 
27 static const void *getMaxAddr(const void *A1, const void *A2) {
28   return A1 > A2 ? A1 : A2;
29 }
30 
31 /*!
32  * \brief Register an instrumented function.
33  *
34  * Calls to this are emitted by clang with -fprofile-instr-generate.  Such
35  * calls are only required (and only emitted) on targets where we haven't
36  * implemented linker magic to find the bounds of the sections.
37  */
38 COMPILER_RT_VISIBILITY
39 void __llvm_profile_register_function(void *Data_) {
40   /* TODO: Only emit this function if we can't use linker magic. */
41   const __llvm_profile_data *Data = (__llvm_profile_data *)Data_;
42   if (!DataFirst) {
43     DataFirst = Data;
44     DataLast = Data + 1;
45     CountersFirst = Data->CounterPtr;
46     CountersLast = (uint64_t *)Data->CounterPtr + Data->NumCounters;
47     return;
48   }
49 
50   DataFirst = (const __llvm_profile_data *)getMinAddr(DataFirst, Data);
51   CountersFirst = (uint64_t *)getMinAddr(CountersFirst, Data->CounterPtr);
52 
53   DataLast = (const __llvm_profile_data *)getMaxAddr(DataLast, Data + 1);
54   CountersLast = (uint64_t *)getMaxAddr(
55       CountersLast, (uint64_t *)Data->CounterPtr + Data->NumCounters);
56 }
57 
58 COMPILER_RT_VISIBILITY
59 void __llvm_profile_register_names_function(void *NamesStart,
60                                             uint64_t NamesSize) {
61   if (!NamesFirst) {
62     NamesFirst = (const char *)NamesStart;
63     NamesLast = (const char *)NamesStart + NamesSize;
64     return;
65   }
66   NamesFirst = (const char *)getMinAddr(NamesFirst, NamesStart);
67   NamesLast =
68       (const char *)getMaxAddr(NamesLast, (const char *)NamesStart + NamesSize);
69 }
70 
71 COMPILER_RT_VISIBILITY
72 const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
73 COMPILER_RT_VISIBILITY
74 const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
75 COMPILER_RT_VISIBILITY
76 const char *__llvm_profile_begin_names(void) { return NamesFirst; }
77 COMPILER_RT_VISIBILITY
78 const char *__llvm_profile_end_names(void) { return NamesLast; }
79 COMPILER_RT_VISIBILITY
80 uint64_t *__llvm_profile_begin_counters(void) { return CountersFirst; }
81 COMPILER_RT_VISIBILITY
82 uint64_t *__llvm_profile_end_counters(void) { return CountersLast; }
83 
84 COMPILER_RT_VISIBILITY
85 ValueProfNode *__llvm_profile_begin_vnodes(void) {
86   return 0;
87 }
88 COMPILER_RT_VISIBILITY
89 ValueProfNode *__llvm_profile_end_vnodes(void) { return 0; }
90 
91 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
92 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
93 
94 #endif
95