third_party/llvm-project/libcxxabi/test/test_vector2.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: no-exceptions

#include "cxxabi.h"

#include <cassert>
#include <cstdlib>
#include <exception>

void my_terminate () { exit ( 0 ); }

//  Wrapper routines
void *my_alloc2 ( size_t sz ) {
    void *p = std::malloc ( sz );
//  std::printf ( "Allocated %ld bytes at %lx\n", sz, (unsigned long) p );
    return p;
}

void my_dealloc2 ( void *p ) {
//  std::printf ( "Freeing %lx\n", (unsigned long) p );
    std::free ( p );
}

void my_dealloc3 ( void *p, size_t ) {
//  std::printf ( "Freeing %lx (size %ld)\n", (unsigned long) p, sz );
    std::free ( p );
}

void my_construct ( void *) {
//  std::printf ( "Constructing %lx\n", (unsigned long) p );
}

void my_destruct  ( void *) {
//  std::printf ( "Destructing  %lx\n", (unsigned long) p );
}

int gCounter;
void count_construct ( void * ) { ++gCounter; }
void count_destruct  ( void * ) { --gCounter; }


int gConstructorCounter;
int gConstructorThrowTarget;
int gDestructorCounter;
int gDestructorThrowTarget;
void throw_construct ( void * ) { if ( gConstructorCounter   == gConstructorThrowTarget ) throw 1; ++gConstructorCounter; }
void throw_destruct  ( void * ) { if ( ++gDestructorCounter  == gDestructorThrowTarget  ) throw 2; }

struct vec_on_stack {
    void *storage;
    vec_on_stack () : storage ( __cxxabiv1::__cxa_vec_new    (            10, 40, 8, throw_construct, throw_destruct )) {}
    ~vec_on_stack () {          __cxxabiv1::__cxa_vec_delete ( storage,       40, 8,                  throw_destruct );  }
};


//  Make sure the constructors and destructors are matched
void test_exception_in_destructor ( ) {

//  Try throwing from a destructor while unwinding the stack -- should abort
    gConstructorCounter = gDestructorCounter = 0;
    gConstructorThrowTarget = -1;
    gDestructorThrowTarget  = 5;
    try {
        vec_on_stack v;
        throw 3;
    } catch ( int i ) {

    }

    assert(false && "should never get here");
}



int main () {
    std::set_terminate ( my_terminate );
    test_exception_in_destructor ();
    return 1;       // we failed if we get here
}