d2dad6287c
It was possible for the parent process to exit before the forked child process had finished. In some shells, this causes the pipe to close and FileCheck misses some output from the child. Waiting for the child process to exit before exiting the parent, assures that all output from stdout and stderr is combined and forwarded through the pipe to FileCheck. rdar://95241490 Differential Revision: https://reviews.llvm.org/D128565
48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
// RUN: %clangxx_asan -fsanitize-coverage=func,trace-pc-guard %s -o %t
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// RUN: rm -rf %t-dir
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// RUN: mkdir -p %t-dir && cd %t-dir
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// RUN: %env_asan_opts=coverage=1:verbosity=1 %run %t 2>&1 | FileCheck %s
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//
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// UNSUPPORTED: android
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// UNSUPPORTED: iossim
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//
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// Ideally a forked-subprocess should only report it's own coverage,
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// not parent's one. But trace-pc-guard currently does nothing special for fork,
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// and thus this test is relaxed.
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#include <stdio.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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__attribute__((noinline))
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void foo() { printf("foo\n"); }
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__attribute__((noinline))
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void bar() { printf("bar\n"); }
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__attribute__((noinline))
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void baz() { printf("baz\n"); }
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int main(int argc, char **argv) {
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pid_t child_pid = fork();
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if (child_pid == 0) {
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fprintf(stderr, "Child PID: %d\n", getpid());
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baz();
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} else {
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fprintf(stderr, "Parent PID: %d\n", getpid());
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foo();
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bar();
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// Wait for the child process(s) to finish
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while (wait(NULL) > 0)
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;
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}
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return 0;
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}
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// CHECK-DAG: Child PID: [[ChildPID:[0-9]+]]
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// CHECK-DAG: [[ChildPID]].sancov: {{.*}} PCs written
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// CHECK-DAG: Parent PID: [[ParentPID:[0-9]+]]
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// CHECK-DAG: [[ParentPID]].sancov: 3 PCs written
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