llvm-project/libcxxabi/test/test_vector1.pass.cpp

//===---------------------------- test_vector.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
//
//===----------------------------------------------------------------------===//

#include "cxxabi.h"

#include <iostream>
#include <cstdlib>
#include <cassert>

//  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 * ) {
#ifndef LIBCXXABI_HAS_NO_EXCEPTIONS
    if ( gConstructorCounter   == gConstructorThrowTarget )
        throw 1;
    ++gConstructorCounter;
#endif
}
void throw_destruct  ( void * ) {
#ifndef LIBCXXABI_HAS_NO_EXCEPTIONS
    if ( ++gDestructorCounter  == gDestructorThrowTarget  )
        throw 2;
#endif
}

#if __cplusplus >= 201103L
#   define CAN_THROW noexcept(false)
#else
#   define CAN_THROW
#endif

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

//  Test calls with empty constructors and destructors
int test_empty ( ) {
    void *one, *two, *three;

//  Try with no padding and no con/destructors
    one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 0, NULL, NULL );
    two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 0, NULL, NULL, my_alloc2, my_dealloc2 );
    three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 0, NULL, NULL, my_alloc2, my_dealloc3 );

    __cxxabiv1::__cxa_vec_delete ( one,       40, 0, NULL );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 0, NULL, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 0, NULL, my_dealloc3 );
    
//  Try with no padding
    one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 0, my_construct, my_destruct );
    two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 0, my_construct, my_destruct, my_alloc2, my_dealloc2 );
    three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 0, my_construct, my_destruct, my_alloc2, my_dealloc3 );

    __cxxabiv1::__cxa_vec_delete ( one,       40, 0, my_destruct );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 0, my_destruct, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 0, my_destruct, my_dealloc3 );

//  Padding and no con/destructors 
    one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 8, NULL, NULL );
    two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 8, NULL, NULL, my_alloc2, my_dealloc2 );
    three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 8, NULL, NULL, my_alloc2, my_dealloc3 );

    __cxxabiv1::__cxa_vec_delete ( one,       40, 8, NULL );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 8, NULL, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 8, NULL, my_dealloc3 );

//  Padding with con/destructors 
    one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 8, my_construct, my_destruct );
    two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 8, my_construct, my_destruct, my_alloc2, my_dealloc2 );
    three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 8, my_construct, my_destruct, my_alloc2, my_dealloc3 );

    __cxxabiv1::__cxa_vec_delete ( one,       40, 8, my_destruct );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 8, my_destruct, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 8, my_destruct, my_dealloc3 );

    return 0;
    }

//  Make sure the constructors and destructors are matched
int test_counted ( ) {
    int retVal = 0;
    void *one, *two, *three;

//  Try with no padding
    gCounter = 0;   
    one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 0, count_construct, count_destruct );
    two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 0, count_construct, count_destruct, my_alloc2, my_dealloc2 );
    three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 0, count_construct, count_destruct, my_alloc2, my_dealloc3 );
    
    __cxxabiv1::__cxa_vec_delete ( one,       40, 0, count_destruct );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 0, count_destruct, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 0, count_destruct, my_dealloc3 );
    
//  Since there was no padding, the # of elements in the array are not stored 
//  and the destructors are not called.
    if ( gCounter != 30 ) {
        std::cerr << "Mismatched Constructor/Destructor calls (1)" << std::endl;
        std::cerr << "  Expected 30, got " << gCounter << std::endl;
        retVal = 1;
        }
    
    gCounter = 0;   
    one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 8, count_construct, count_destruct );
    two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 8, count_construct, count_destruct, my_alloc2, my_dealloc2 );
    three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 8, count_construct, count_destruct, my_alloc2, my_dealloc3 );

    __cxxabiv1::__cxa_vec_delete ( one,       40, 8, count_destruct );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 8, count_destruct, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 8, count_destruct, my_dealloc3 );

    if ( gCounter != 0 ) {
        std::cerr << "Mismatched Constructor/Destructor calls (2)" << std::endl;
        std::cerr << "  Expected 0, got " << gCounter << std::endl;
        retVal = 1;
        }

    return retVal;
    }
    
#ifndef LIBCXXABI_HAS_NO_EXCEPTIONS
//  Make sure the constructors and destructors are matched
int test_exception_in_constructor ( ) {
    int retVal = 0;
    void *one, *two, *three;

//  Try with no padding
    gConstructorCounter = gDestructorCounter = 0;
    gConstructorThrowTarget = 15;
    gDestructorThrowTarget  = -1;
    try {
        one = two = three = NULL;
        one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 0, throw_construct, throw_destruct );
        two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 0, throw_construct, throw_destruct, my_alloc2, my_dealloc2 );
        three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 0, throw_construct, throw_destruct, my_alloc2, my_dealloc3 );
        }
    catch ( int i ) {}
    
    __cxxabiv1::__cxa_vec_delete ( one,       40, 0, throw_destruct );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 0, throw_destruct, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 0, throw_destruct, my_dealloc3 );
    
//  Since there was no padding, the # of elements in the array are not stored 
//  and the destructors are not called.
//  Since we threw after 15 calls to the constructor, we should see 5 calls to
//      the destructor from the partially constructed array.
    if ( gConstructorCounter - gDestructorCounter != 10 ) {
        std::cerr << "Mismatched Constructor/Destructor calls (1C)" << std::endl;
        std::cerr << gConstructorCounter << " constructors, but " << 
                gDestructorCounter << " destructors" << std::endl;
        retVal = 1;
        }
    
    gConstructorCounter = gDestructorCounter = 0;
    gConstructorThrowTarget = 15;
    gDestructorThrowTarget  = -1;
    try {
        one = two = three = NULL;
        one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 8, throw_construct, throw_destruct );
        two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 8, throw_construct, throw_destruct, my_alloc2, my_dealloc2 );
        three   = __cxxabiv1::__cxa_vec_new3( 10, 40, 8, throw_construct, throw_destruct, my_alloc2, my_dealloc3 );
        }
    catch ( int i ) {}
    
    __cxxabiv1::__cxa_vec_delete ( one,       40, 8, throw_destruct );
    __cxxabiv1::__cxa_vec_delete2( two,       40, 8, throw_destruct, my_dealloc2 );
    __cxxabiv1::__cxa_vec_delete3( three,     40, 8, throw_destruct, my_dealloc3 );

    if ( gConstructorCounter != gDestructorCounter ) {
        std::cerr << "Mismatched Constructor/Destructor calls (2C)" << std::endl;
        std::cerr << gConstructorCounter << " constructors, but " << 
                gDestructorCounter << " destructors" << std::endl;
        retVal = 1;
        }

    return retVal;
    }
#endif

#ifndef LIBCXXABI_HAS_NO_EXCEPTIONS
//  Make sure the constructors and destructors are matched
int test_exception_in_destructor ( ) {
    int retVal = 0;
    void *one, *two, *three;
    one = two = three = NULL;

//  Throw from within a destructor
    gConstructorCounter = gDestructorCounter = 0;
    gConstructorThrowTarget = -1;
    gDestructorThrowTarget  = 15;
    try {
        one = two = NULL;
        one     = __cxxabiv1::__cxa_vec_new ( 10, 40, 8, throw_construct, throw_destruct );
        two     = __cxxabiv1::__cxa_vec_new2( 10, 40, 8, throw_construct, throw_destruct, my_alloc2, my_dealloc2 );
        }
    catch ( int i ) {}
    
    try {
        __cxxabiv1::__cxa_vec_delete ( one,       40, 8, throw_destruct );
        __cxxabiv1::__cxa_vec_delete2( two,       40, 8, throw_destruct, my_dealloc2 );
        assert(false);
        }
    catch ( int i ) {}
    
//  We should have thrown in the middle of cleaning up "two", which means that
//  there should be 20 calls to the destructor and the try block should exit
//  before the assertion.
    if ( gConstructorCounter != 20 || gDestructorCounter != 20 ) {
        std::cerr << "Unexpected Constructor/Destructor calls (1D)" << std::endl;
        std::cerr << "Expected (20, 20), but got (" << gConstructorCounter << ", " <<
                gDestructorCounter << ")" << std::endl;
        retVal = 1;
        }

//  Try throwing from a destructor - should be fine.
    gConstructorCounter = gDestructorCounter = 0;
    gConstructorThrowTarget = -1;
    gDestructorThrowTarget  = 5;
    try { vec_on_stack v; }
    catch ( int i ) {}
    
    if ( gConstructorCounter != gDestructorCounter ) {
        std::cerr << "Mismatched Constructor/Destructor calls (2D)" << std::endl;
        std::cerr << gConstructorCounter << " constructors, but " << 
                gDestructorCounter << " destructors" << std::endl;
        retVal = 1;
        }

    return retVal;
    }
#endif

int main () {
    int retVal = 0;
    retVal += test_empty ();
    retVal += test_counted ();
#ifndef LIBCXXABI_HAS_NO_EXCEPTIONS
    retVal += test_exception_in_constructor ();
    retVal += test_exception_in_destructor ();
#endif
    return retVal;
    }