1 // Set these requirements to ensure that we have an 8-byte binary ID.
2 // REQUIRES: linux
3 //
4 // This will generate a 20-byte build ID, which requires 4-byte padding.
5 // RUN: %clang_profgen -Wl,--build-id=sha1 -o %t %s
6 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
7 // RUN: %run %t %t.profraw
8
9 #include <errno.h>
10 #include <stdio.h>
11 #include <stdint.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <sys/mman.h>
15 #include <sys/stat.h>
16 #include <sys/stat.h>
17 #include <fcntl.h>
18 #include <unistd.h>
19
20 enum ValueKind {
21 #define VALUE_PROF_KIND(Enumerator, Value, Descr) Enumerator = Value,
22 #include "profile/InstrProfData.inc"
23 };
24
25 typedef struct __llvm_profile_header {
26 #define INSTR_PROF_RAW_HEADER(Type, Name, Initializer) Type Name;
27 #include "profile/InstrProfData.inc"
28 } __llvm_profile_header;
29
30 typedef void *IntPtrT;
31 typedef struct __llvm_profile_data {
32 #define INSTR_PROF_DATA(Type, LLVMType, Name, Initializer) Type Name;
33 #include "profile/InstrProfData.inc"
34 } __llvm_profile_data;
35
bail(const char * str)36 void bail(const char* str) {
37 fprintf(stderr, "%s %s\n", str, strerror(errno));
38 exit(1);
39 }
40
func()41 void func() {}
42
main(int argc,char ** argv)43 int main(int argc, char** argv) {
44 if (argc == 2) {
45 int fd = open(argv[1], O_RDONLY);
46 if (fd == -1)
47 bail("open");
48
49 struct stat st;
50 if (stat(argv[1], &st))
51 bail("stat");
52 uint64_t FileSize = st.st_size;
53
54 char* Buf = (char *)mmap(NULL, FileSize, PROT_READ, MAP_SHARED, fd, 0);
55 if (Buf == MAP_FAILED)
56 bail("mmap");
57
58 __llvm_profile_header *Header = (__llvm_profile_header *)Buf;
59 if (Header->BinaryIdsSize != 32)
60 bail("Invalid binary ID size");
61
62 char *BinaryIdsStart = Buf + sizeof(__llvm_profile_header);
63
64 uint64_t BinaryIdSize = *((uint64_t *)BinaryIdsStart);
65 if (BinaryIdSize != 20)
66 bail("Expected a binary ID of size 20");
67
68 // Skip the size and the binary ID itself to check padding.
69 BinaryIdsStart += 8 + 20;
70 if (*((uint32_t *)BinaryIdsStart))
71 bail("Found non-zero binary ID padding");
72
73 if (munmap(Buf, FileSize))
74 bail("munmap");
75
76 if (close(fd))
77 bail("close");
78 } else {
79 func();
80 }
81 return 0;
82 }
83