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//=============================================================================
/**
* @file New_Fail_Test.cpp
*
* Checks to be sure that a failed ACE_NEW[_RETURN | _NORETURN] doesn't end
* up throwing an exception up to the caller.
*
* Note that this test doesn't get a real attempt on platforms which:
* 1. Are known to throw exceptions when 'new' runs out of resources,
* 2. Are built with exceptions disabled.
* In these cases, the test puts a message in the log noting that a failed
* new will throw an exception, and trust that the user accepts that risk.
*
* @author Steve Huston <shuston@riverace.com>
*/
//=============================================================================
#include "test_config.h"
#include "ace/Log_Msg.h"
#include "ace/OS_Memory.h"
#include "ace/CORBA_macros.h"
#include "ace/Numeric_Limits.h"
// This test allocates all of the heap memory, forcing 'new' to fail
// because of a lack of memory. The ACE_NEW macros should prevent an
// exception from being thrown past the ACE_NEW. If this test doesn't
// wipe out on an alloc exception, it passes.
//
// If it doesn't ever fail an allocation, there's a warning that something is
// wrong. The allocated memory is always freed to avoid masking a leak
// somewhere else in the test.
// Most we can do on Windows, else we get a C2148 compile error
static const size_t BIG_BLOCK = ACE_Numeric_Limits<size_t>::max ()/4;
// Shouldn't take many "as much as possible" tries to get a failure.
static constexpr int MAX_ALLOCS_IN_TEST = 20;
static void
try_ace_new (char **p)
{
ACE_NEW (*p, char[BIG_BLOCK]);
return;
}
static char *
try_ace_new_return ()
{
char *p {};
ACE_NEW_RETURN (p, char[BIG_BLOCK], nullptr);
return p;
}
static char *
try_ace_new_noreturn ()
{
char *p {};
ACE_NEW_NORETURN (p, char[BIG_BLOCK]);
return p;
}
int
run_main (int, ACE_TCHAR *[])
{
ACE_START_TEST (ACE_TEXT ("New_Fail_Test"));
int status {};
char *blocks[MAX_ALLOCS_IN_TEST];
int i {};
try
{
// First part: test ACE_NEW
for (i = 0; i < MAX_ALLOCS_IN_TEST; i++)
{
try_ace_new (&blocks[i]);
if (blocks[i] == 0)
break;
}
if (i == MAX_ALLOCS_IN_TEST)
{
ACE_ERROR ((LM_WARNING,
ACE_TEXT ("Test didn't exhaust available memory\n")));
// Back up to valid pointer for deleting.
--i;
}
else
{
ACE_TEST_ASSERT (blocks[i] == 0);
if (errno == ENOMEM)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("ACE_NEW failed properly at block %d\n"),
i));
else
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("ACE_NEW failed at block %d, but ")
ACE_TEXT ("expected ENOMEM, %p (%d)\n"),
i,
ACE_TEXT ("got"),
ACE_ERRNO_GET));
}
// Free the memory to try ACE_NEW_RETURN
while (i >= 0)
delete [] blocks[i--];
// Second part: test ACE_NEW_RETURN
for (i = 0; i < MAX_ALLOCS_IN_TEST; i++)
{
blocks[i] = try_ace_new_return ();
if (blocks[i] == 0)
break;
}
if (i == MAX_ALLOCS_IN_TEST)
{
ACE_ERROR ((LM_WARNING,
ACE_TEXT ("Test didn't exhaust available memory\n")));
// Back up to valid pointer.
--i;
}
else
{
ACE_TEST_ASSERT (blocks[i] == 0);
if (errno == ENOMEM)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("ACE_NEW_RETURN failed properly at block %d\n"),
i));
else
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("ACE_NEW_RETURN failed at block %d, but ")
ACE_TEXT ("expected ENOMEM, %p (%d)\n"),
i,
ACE_TEXT ("got"),
ACE_ERRNO_GET));
}
while (i >= 0)
delete [] blocks[i--];
// Third part: test ACE_NEW_NORETURN
for (i = 0; i < MAX_ALLOCS_IN_TEST; i++)
{
blocks[i] = try_ace_new_noreturn ();
if (blocks[i] == 0)
break;
}
if (i == MAX_ALLOCS_IN_TEST)
{
ACE_ERROR ((LM_WARNING,
ACE_TEXT ("Test didn't exhaust available memory\n")));
// Back up to valid pointer.
--i;
}
else
{
ACE_TEST_ASSERT (blocks[i] == 0);
if (errno == ENOMEM)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("ACE_NEW_NORETURN failed properly at block %d\n"),
i));
else
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("ACE_NEW_NORETURN failed at block %d, but ")
ACE_TEXT ("expected ENOMEM, %p (%d)\n"),
i,
ACE_TEXT ("got"),
ACE_ERRNO_GET));
}
while (i >= 0)
delete [] blocks[i--];
}
catch (...)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("Caught exception during test; ")
ACE_TEXT ("ACE_bad_alloc not defined correctly, or\n")));
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("ACE_NEW_THROWS_EXCEPTIONS is not #defined ")
ACE_TEXT ("(and should be).\n")));
// Mark test failure
status = 1;
}
ACE_END_TEST;
return status;
}
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