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(__sun__) && defined(__svr4__)) && !defined(__NetBSD__) &&        \
11     !defined(_WIN32)
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 uint64_t *CountersFirst = NULL;
24 static uint64_t *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 = Data->CounterPtr;
50     CountersLast = (uint64_t *)Data->CounterPtr + Data->NumCounters;
51     return;
52   }
53 
54   DataFirst = (const __llvm_profile_data *)getMinAddr(DataFirst, Data);
55   CountersFirst = (uint64_t *)getMinAddr(CountersFirst, Data->CounterPtr);
56 
57   DataLast = (const __llvm_profile_data *)getMaxAddr(DataLast, Data + 1);
58   CountersLast = (uint64_t *)getMaxAddr(
59       CountersLast, (uint64_t *)Data->CounterPtr + Data->NumCounters);
60 }
61 
62 COMPILER_RT_VISIBILITY
63 void __llvm_profile_register_names_function(void *NamesStart,
64                                             uint64_t NamesSize) {
65   if (!NamesFirst) {
66     NamesFirst = (const char *)NamesStart;
67     NamesLast = (const char *)NamesStart + NamesSize;
68     return;
69   }
70   NamesFirst = (const char *)getMinAddr(NamesFirst, NamesStart);
71   NamesLast =
72       (const char *)getMaxAddr(NamesLast, (const char *)NamesStart + NamesSize);
73 }
74 
75 COMPILER_RT_VISIBILITY
76 const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
77 COMPILER_RT_VISIBILITY
78 const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
79 COMPILER_RT_VISIBILITY
80 const char *__llvm_profile_begin_names(void) { return NamesFirst; }
81 COMPILER_RT_VISIBILITY
82 const char *__llvm_profile_end_names(void) { return NamesLast; }
83 COMPILER_RT_VISIBILITY
84 uint64_t *__llvm_profile_begin_counters(void) { return CountersFirst; }
85 COMPILER_RT_VISIBILITY
86 uint64_t *__llvm_profile_end_counters(void) { return CountersLast; }
87 /* TODO: correctly set up OrderFileFirst. */
88 COMPILER_RT_VISIBILITY
89 uint32_t *__llvm_profile_begin_orderfile(void) { return OrderFileFirst; }
90 
91 COMPILER_RT_VISIBILITY
92 ValueProfNode *__llvm_profile_begin_vnodes(void) {
93   return 0;
94 }
95 COMPILER_RT_VISIBILITY
96 ValueProfNode *__llvm_profile_end_vnodes(void) { return 0; }
97 
98 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
99 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
100 
101 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
102   return 0;
103 }
104 
105 #endif
106