diff options
author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2018-03-16 22:15:05 +0000 |
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committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2018-03-16 22:15:05 +0000 |
commit | 5fe72ccbb2c5733e929b146e23ba7c5aa16faab5 (patch) | |
tree | 61ca64efa12cb05334d476a7e1dc19164cd90903 /test/asan | |
parent | da8ddca6ddbd7f12d73eb42c268f37a0c0a345c5 (diff) |
[asan] Replace vfork with fork.
Summary:
vfork is not ASan-friendly because it modifies stack shadow in the
parent process address space. While it is possible to compensate for that with, for example,
__asan_handle_no_return before each call to _exit or execve and friends, simply replacing
vfork with fork looks like by far the easiest solution.
Posix compliant programs can not detect the difference between vfork and fork.
Fixes https://github.com/google/sanitizers/issues/925
Reviewers: kcc, vitalybuka
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D44587
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@327752 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/asan')
-rw-r--r-- | test/asan/TestCases/Posix/vfork.cc | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/asan/TestCases/Posix/vfork.cc b/test/asan/TestCases/Posix/vfork.cc new file mode 100644 index 000000000..5fcb11f53 --- /dev/null +++ b/test/asan/TestCases/Posix/vfork.cc @@ -0,0 +1,30 @@ +// Test that vfork() is fork(). +// https://github.com/google/sanitizers/issues/925 + +// RUN: %clangxx_asan -O0 %s -o %t && %run %t 2>&1 + +#include <assert.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <unistd.h> + +int volatile global; + +int main(int argc, char **argv) { + pid_t pid = vfork(); + if (pid) { + // parent + int status; + int res; + do { + res = waitpid(pid, &status, 0); + } while (res >= 0 && !WIFEXITED(status) && !WIFSIGNALED(status)); + assert(global == 0); + } else { + // child + global = 42; + _exit(0); + } + + return 0; +} |