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 char *NamesFirst = NULL;
22 static const char *NamesLast = NULL;
23 static char *CountersFirst = NULL;
24 static char *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 = (char *)((uintptr_t)Data_ + Data->CounterPtr);
50     CountersLast =
51         CountersFirst + Data->NumCounters * __llvm_profile_counter_entry_size();
52     return;
53   }
54 
55   DataFirst = (const __llvm_profile_data *)getMinAddr(DataFirst, Data);
56   CountersFirst = (char *)getMinAddr(
57       CountersFirst, (char *)((uintptr_t)Data_ + Data->CounterPtr));
58 
59   DataLast = (const __llvm_profile_data *)getMaxAddr(DataLast, Data + 1);
60   CountersLast = (char *)getMaxAddr(
61       CountersLast,
62       (char *)((uintptr_t)Data_ + Data->CounterPtr) +
63           Data->NumCounters * __llvm_profile_counter_entry_size());
64 }
65 
66 COMPILER_RT_VISIBILITY
67 void __llvm_profile_register_names_function(void *NamesStart,
68                                             uint64_t NamesSize) {
69   if (!NamesFirst) {
70     NamesFirst = (const char *)NamesStart;
71     NamesLast = (const char *)NamesStart + NamesSize;
72     return;
73   }
74   NamesFirst = (const char *)getMinAddr(NamesFirst, NamesStart);
75   NamesLast =
76       (const char *)getMaxAddr(NamesLast, (const char *)NamesStart + NamesSize);
77 }
78 
79 COMPILER_RT_VISIBILITY
80 const __llvm_profile_data *__llvm_profile_begin_data(void) { return DataFirst; }
81 COMPILER_RT_VISIBILITY
82 const __llvm_profile_data *__llvm_profile_end_data(void) { return DataLast; }
83 COMPILER_RT_VISIBILITY
84 const char *__llvm_profile_begin_names(void) { return NamesFirst; }
85 COMPILER_RT_VISIBILITY
86 const char *__llvm_profile_end_names(void) { return NamesLast; }
87 COMPILER_RT_VISIBILITY
88 char *__llvm_profile_begin_counters(void) { return CountersFirst; }
89 COMPILER_RT_VISIBILITY
90 char *__llvm_profile_end_counters(void) { return CountersLast; }
91 /* TODO: correctly set up OrderFileFirst. */
92 COMPILER_RT_VISIBILITY
93 uint32_t *__llvm_profile_begin_orderfile(void) { return OrderFileFirst; }
94 
95 COMPILER_RT_VISIBILITY
96 ValueProfNode *__llvm_profile_begin_vnodes(void) {
97   return 0;
98 }
99 COMPILER_RT_VISIBILITY
100 ValueProfNode *__llvm_profile_end_vnodes(void) { return 0; }
101 
102 COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
103 COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
104 
105 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
106   return 0;
107 }
108 
109 #endif
110