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
getMinAddr(const void * A1,const void * A2)23 static const void *getMinAddr(const void *A1, const void *A2) {
24 return A1 < A2 ? A1 : A2;
25 }
26
getMaxAddr(const void * A1,const void * A2)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
__llvm_profile_register_function(void * Data_)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
__llvm_profile_register_names_function(void * NamesStart,uint64_t NamesSize)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
__llvm_profile_begin_data(void)72 const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
73 COMPILER_RT_VISIBILITY
__llvm_profile_end_data(void)74 const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
75 COMPILER_RT_VISIBILITY
__llvm_profile_begin_names(void)76 const char *__llvm_profile_begin_names(void) { return NamesFirst; }
77 COMPILER_RT_VISIBILITY
__llvm_profile_end_names(void)78 const char *__llvm_profile_end_names(void) { return NamesLast; }
79 COMPILER_RT_VISIBILITY
__llvm_profile_begin_counters(void)80 uint64_t *__llvm_profile_begin_counters(void) { return CountersFirst; }
81 COMPILER_RT_VISIBILITY
__llvm_profile_end_counters(void)82 uint64_t *__llvm_profile_end_counters(void) { return CountersLast; }
83
84 COMPILER_RT_VISIBILITY
__llvm_profile_begin_vnodes(void)85 ValueProfNode *__llvm_profile_begin_vnodes(void) {
86 return 0;
87 }
88 COMPILER_RT_VISIBILITY
__llvm_profile_end_vnodes(void)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