emscripten-core / posixtestsuite Goto Github PK

Firstly, relies on uninitialized stack data to create a (hopefully-invalid and crash-causing pthread_attr_t:

Secondly it calls pthread_exit() with an error code from a signal handler installed on the main thread:

The author seems to think that calling pthead_exit() like this will cause the overall test to return the error code, but that is now how it works. Calling pthead_exit form the main thread always exist with code 0.. the value passed to pthread_exit is only used when the thread is being joined.. not when exiting the process. This means the test will print that it failed Test FAILED: Did not receive segmentation fault signal, waited 10 seconds but actually return zero as the process exit code.

For example:

I'm not sure how common this is in the wild but it hard to make this work in WebAssembly were we have strong type checking on function signatures.

The WITH_SYNCHRO mode that many of the pthread tests use, does not currently work