1 /*===- InstrProfilingPlatformWindows.c - Profile data on Windows ----------===*\
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 #include "InstrProfiling.h"
10 #include "InstrProfilingInternal.h"
11 
12 #if defined(_WIN32)
13 
14 #if defined(_MSC_VER)
15 /* Merge read-write sections into .data. */
16 #pragma comment(linker, "/MERGE:.lprfc=.data")
17 #pragma comment(linker, "/MERGE:.lprfd=.data")
18 #pragma comment(linker, "/MERGE:.lprfv=.data")
19 #pragma comment(linker, "/MERGE:.lprfnd=.data")
20 /* Do *NOT* merge .lprfn and .lcovmap into .rdata. llvm-cov must be able to find
21  * after the fact.
22  */
23 
24 /* Allocate read-only section bounds. */
25 #pragma section(".lprfn$A", read)
26 #pragma section(".lprfn$Z", read)
27 
28 /* Allocate read-write section bounds. */
29 #pragma section(".lprfd$A", read, write)
30 #pragma section(".lprfd$Z", read, write)
31 #pragma section(".lprfc$A", read, write)
32 #pragma section(".lprfc$Z", read, write)
33 #pragma section(".lorderfile$A", read, write)
34 #pragma section(".lprfnd$A", read, write)
35 #pragma section(".lprfnd$Z", read, write)
36 #endif
37 
38 __llvm_profile_data COMPILER_RT_SECTION(".lprfd$A") DataStart = {0};
39 __llvm_profile_data COMPILER_RT_SECTION(".lprfd$Z") DataEnd = {0};
40 
41 const char COMPILER_RT_SECTION(".lprfn$A") NamesStart = '\0';
42 const char COMPILER_RT_SECTION(".lprfn$Z") NamesEnd = '\0';
43 
44 uint64_t COMPILER_RT_SECTION(".lprfc$A") CountersStart;
45 uint64_t COMPILER_RT_SECTION(".lprfc$Z") CountersEnd;
46 uint32_t COMPILER_RT_SECTION(".lorderfile$A") OrderFileStart;
47 
48 ValueProfNode COMPILER_RT_SECTION(".lprfnd$A") VNodesStart;
49 ValueProfNode COMPILER_RT_SECTION(".lprfnd$Z") VNodesEnd;
50 
51 const __llvm_profile_data *__llvm_profile_begin_data(void) {
52   return &DataStart + 1;
53 }
54 const __llvm_profile_data *__llvm_profile_end_data(void) { return &DataEnd; }
55 
56 const char *__llvm_profile_begin_names(void) { return &NamesStart + 1; }
57 const char *__llvm_profile_end_names(void) { return &NamesEnd; }
58 
59 uint64_t *__llvm_profile_begin_counters(void) { return &CountersStart + 1; }
60 uint64_t *__llvm_profile_end_counters(void) { return &CountersEnd; }
61 uint32_t *__llvm_profile_begin_orderfile(void) { return &OrderFileStart; }
62 
63 ValueProfNode *__llvm_profile_begin_vnodes(void) { return &VNodesStart + 1; }
64 ValueProfNode *__llvm_profile_end_vnodes(void) { return &VNodesEnd; }
65 
66 ValueProfNode *CurrentVNode = &VNodesStart + 1;
67 ValueProfNode *EndVNode = &VNodesEnd;
68 
69 COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer) {
70   return 0;
71 }
72 
73 #endif
74