1// REQUIRES: darwin
2
3// Test the online merging mode (%m) along with continuous mode (%c).
4//
5// Create & cd into a temporary directory.
6// RUN: rm -rf %t.dir && mkdir -p %t.dir && cd %t.dir
7//
8// Create two DSOs and a driver program that uses them.
9// RUN: echo "void dso1(void) {}" > dso1.c
10// RUN: echo "void dso2(void) {}" > dso2.c
11// RUN: %clang_pgogen -dynamiclib -o %t.dir/dso1.dylib dso1.c -mllvm -instrprof-atomic-counter-update-all=1
12// RUN: %clang_pgogen -dynamiclib -o %t.dir/dso2.dylib dso2.c -mllvm -instrprof-atomic-counter-update-all=1
13// RUN: %clang_pgogen -o main.exe %s %t.dir/dso1.dylib %t.dir/dso2.dylib -mllvm -instrprof-atomic-counter-update-all=1
14//
15// === Round 1 ===
16// Test merging+continuous mode without any file contention.
17//
18// RUN: env LLVM_PROFILE_FILE="%t.dir/profdir/%m%c.profraw" %run %t.dir/main.exe nospawn
19// RUN: llvm-profdata merge -o %t.profdata %t.dir/profdir
20// RUN: llvm-profdata show --counts --all-functions %t.profdata | FileCheck %s -check-prefix=ROUND1
21
22// ROUND1-LABEL: Counters:
23// ROUND1-DAG: dso1:
24// ROUND1-DAG: Hash: 0x{{.*}}
25// ROUND1-DAG: Counters: 1
26// ROUND1-DAG: Block counts: [1]
27// ROUND1-DAG: dso2:
28// ROUND1-DAG: Hash: 0x{{.*}}
29// ROUND1-DAG: Counters: 1
30// ROUND1-DAG: Block counts: [1]
31// ROUND1-DAG: main:
32// ROUND1-DAG: Hash: 0x{{.*}}
33// ROUND1-LABEL: Instrumentation level: IR
34// ROUND1-NEXT: Functions shown: 3
35// ROUND1-NEXT: Total functions: 3
36// ROUND1-NEXT: Maximum function count: 1
37// ROUND1-NEXT: Maximum internal block count: 1
38//
39// === Round 2 ===
40// Test merging+continuous mode with some file contention.
41//
42// RUN: env LLVM_PROFILE_FILE="%t.dir/profdir/%m%c.profraw" %run %t.dir/main.exe spawn 'LLVM_PROFILE_FILE=%t.dir/profdir/%m%c.profraw'
43// RUN: llvm-profdata merge -o %t.profdata %t.dir/profdir
44// RUN: llvm-profdata show --counts --all-functions %t.profdata | FileCheck %s -check-prefix=ROUND2
45
46// ROUND2-LABEL: Counters:
47// ROUND2-DAG: dso1:
48// ROUND2-DAG: Hash: 0x{{.*}}
49// ROUND2-DAG: Counters: 1
50// ROUND2-DAG: Block counts: [97]
51// ROUND2-DAG: dso2:
52// ROUND2-DAG: Hash: 0x{{.*}}
53// ROUND2-DAG: Counters: 1
54// ROUND2-DAG: Block counts: [97]
55// ROUND2-DAG: main:
56// ROUND2-DAG: Hash: 0x{{.*}}
57// ROUND2-LABEL: Instrumentation level: IR
58// ROUND2-NEXT: Functions shown: 3
59// ROUND2-NEXT: Total functions: 3
60// ROUND2-NEXT: Maximum function count: 97
61// ROUND2-NEXT: Maximum internal block count: 33
62
63#include <spawn.h>
64#include <sys/wait.h>
65#include <sys/errno.h>
66#include <unistd.h>
67#include <string.h>
68#include <stdio.h>
69
70const int num_child_procs_to_spawn = 32;
71
72extern int __llvm_profile_is_continuous_mode_enabled(void);
73extern char *__llvm_profile_get_filename(void);
74
75void dso1(void);
76void dso2(void);
77
78// Change to "#define" for debug output.
79#undef DEBUG_TEST
80
81#ifdef DEBUG_TEST
82#define DEBUG(...) fprintf(stderr, __VA_ARGS__);
83#else
84#define DEBUG(...)
85#endif
86
87int main(int argc, char *const argv[]) {
88 if (strcmp(s1: argv[1], s2: "nospawn") == 0) {
89 DEBUG("Hello from child (pid = %d, cont-mode-enabled = %d, profile = %s).\n",
90 getpid(), __llvm_profile_is_continuous_mode_enabled(), __llvm_profile_get_filename());
91
92 dso1();
93 dso2();
94 return 0;
95 } else if (strcmp(s1: argv[1], s2: "spawn") == 0) {
96 // This is the start of Round 2.
97 // Expect Counts[dsoX] = 1, as this was the state at the end of Round 1.
98
99 int I;
100 pid_t child_pids[num_child_procs_to_spawn];
101 char *const child_argv[] = {argv[0], "nospawn", NULL};
102 char *const child_envp[] = {argv[2], NULL};
103 for (I = 0; I < num_child_procs_to_spawn; ++I) {
104 dso1(); // Counts[dsoX] += 2 * num_child_procs_to_spawn
105 dso2();
106
107 DEBUG("Spawning child with argv = {%s, %s, NULL} and envp = {%s, NULL}\n",
108 child_argv[0], child_argv[1], child_envp[0]);
109
110 int ret = posix_spawn(pid: &child_pids[I], path: argv[0], NULL, NULL, argv: child_argv,
111 envp: child_envp);
112 if (ret != 0) {
113 fprintf(stderr, format: "Child %d could not be spawned: ret = %d, msg = %s\n",
114 I, ret, strerror(errnum: ret));
115 return 1;
116 }
117
118 DEBUG("Spawned child %d (pid = %d).\n", I, child_pids[I]);
119 }
120 for (I = 0; I < num_child_procs_to_spawn; ++I) {
121 dso1(); // Counts[dsoX] += num_child_procs_to_spawn
122 dso2();
123
124 int status;
125 waitpid(pid: child_pids[I], stat_loc: &status, options: 0);
126 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
127 fprintf(stderr, format: "Child %d did not exit with code 0.\n", I);
128 return 1;
129 }
130 }
131
132 // At the end of Round 2, we have:
133 // Counts[dsoX] = 1 + (2 * num_child_procs_to_spawn) + num_child_procs_to_spawn
134 // = 97
135
136 return 0;
137 }
138
139 return 1;
140}
141

source code of compiler-rt/test/profile/ContinuousSyncMode/online-merging.c