llvm-project/libcxxabi/test/test_exception_storage_nodynmem.pass.cpp

//===--------------- test_exception_storage_nodynmem.cpp ------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: libcxxabi-no-exceptions

// cxa_exception_storage does not use dynamic memory in the single thread mode.
// UNSUPPORTED: libcpp-has-no-threads

// Our overwritten calloc() is not compatible with these sanitizers.
// UNSUPPORTED: msan, tsan

#include <assert.h>
#include <cstdlib>

static bool OverwrittenCallocCalled = false;

// Override calloc to simulate exhaustion of dynamic memory
void *calloc(size_t, size_t) {
    OverwrittenCallocCalled = true;
    return 0;
}

int main(int argc, char *argv[]) {
    // Run the test a couple of times
    // to ensure that fallback memory doesn't leak.
    for (int I = 0; I < 1000; ++I)
        try {
            throw 42;
        } catch (...) {
        }

    assert(OverwrittenCallocCalled);
    return 0;
}