6d75f54310
Moves the sanitizer ui tests to the sanitizer directory and removes the sanitizer prefix from tests file names similarly to how the sanitizer codegen tests are organized.
58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
// Verifies that ThreadSanitizer is able to detect a data race in heap allocated
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// memory block.
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//
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// Test case minimizes the use of the standard library to avoid its ambiguous
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// status with respect to instrumentation (it could vary depending on whatever
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// a function call is inlined or not).
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//
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// The conflicting data access is de-facto synchronized with a special TSAN
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// barrier, which does not introduce synchronization from TSAN perspective, but
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// is necessary to make the test robust. Without the barrier data race detection
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// would occasionally fail, making test flaky.
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//
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//@ needs-sanitizer-support
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//@ needs-sanitizer-thread
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//
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//@ compile-flags: -Z sanitizer=thread -O
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//
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//@ run-fail
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//@ error-pattern: WARNING: ThreadSanitizer: data race
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//@ error-pattern: Location is heap block of size 4
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//@ error-pattern: allocated by main thread
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#![feature(raw_ref_op)]
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#![feature(rustc_private)]
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extern crate libc;
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use std::mem;
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use std::ptr;
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static mut BARRIER: u64 = 0;
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extern "C" {
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fn __tsan_testonly_barrier_init(barrier: *mut u64, count: u32);
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fn __tsan_testonly_barrier_wait(barrier: *mut u64);
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}
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extern "C" fn start(c: *mut libc::c_void) -> *mut libc::c_void {
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unsafe {
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let c: *mut u32 = c.cast();
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*c += 1;
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__tsan_testonly_barrier_wait(&raw mut BARRIER);
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ptr::null_mut()
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}
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}
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fn main() {
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unsafe {
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__tsan_testonly_barrier_init(&raw mut BARRIER, 2);
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let c: *mut u32 = Box::into_raw(Box::new(1));
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let mut t: libc::pthread_t = mem::zeroed();
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libc::pthread_create(&mut t, ptr::null(), start, c.cast());
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__tsan_testonly_barrier_wait(&raw mut BARRIER);
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*c += 1;
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libc::pthread_join(t, ptr::null_mut());
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Box::from_raw(c);
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}
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}
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