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// $Id$
//
// ============================================================================
//
// = LIBRARY
// tests
//
// = FILENAME
// New_Fail_Test.cpp
//
// = DESCRIPTION
// Checks to be sure that a failed ACE_NEW[_RETURN] 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
//
// ============================================================================
#include "test_config.h"
#include "ace/Log_Msg.h"
#include "ace/OS.h"
#include "ace/CORBA_macros.h"
ACE_RCSID(tests, New_Fail_Test, "$Id$")
#if defined(__BORLANDC__) && __BORLANDC__ >= 0x0530
USELIB("..\ace\aced.lib");
//---------------------------------------------------------------------------
#endif /* defined(__BORLANDC__) && __BORLANDC__ >= 0x0530 */
// 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.
static const int BIG_BLOCK = 1024*1024; // 1MB
static const int MAX_ALLOCS_IN_TEST = 4096; // about 4GB max in the test
static void try_ace_new (char **p)
{
ACE_NEW (*p, char[BIG_BLOCK]);
return;
}
static char * try_ace_new_return (void)
{
char *p;
ACE_NEW_RETURN (p, char[BIG_BLOCK], 0);
return p;
}
int
main (int, ASYS_TCHAR *[])
{
ACE_START_TEST (ASYS_TEXT ("New_Fail_Test"));
int status = 0;
// Some platforms are known to throw an exception on a failed 'new', but
// are customarily built without exception support to improve performance.
// These platforms are noted, and the test passes.
// For new ports, it is wise to let this test run. Depending on intended
// conditions, exceptions can be disabled when the port is complete.
#if (defined (__SUNPRO_CC) || defined (__GNUG__)) && \
!defined (ACE_HAS_EXCEPTIONS)
ACE_DEBUG ((LM_NOTICE, "Out-of-memory will throw an unhandled exception\n"));
ACE_DEBUG ((LM_NOTICE, "Rebuild with exceptions=1 to prevent this, but it may impair performance.\n"));
// Use the static function addresses, to prevent warnings about the
// functions not being used.
if (&try_ace_new) /* null */;
if (&try_ace_new_return) /* null */;
#else
char *blocks[MAX_ALLOCS_IN_TEST];
int i;
#if defined (ACE_HAS_EXCEPTIONS)
try
{
#endif /* ACE_HAS_EXCEPTIONS */
// 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,
"Test didn't exhaust all available memory\n"));
--i; // Back up to valid pointer for deleting
}
else
{
ACE_ASSERT (blocks[i] == 0);
ACE_ASSERT (errno == ENOMEM);
ACE_DEBUG((LM_DEBUG, "ACE_NEW failed properly at block %d\n", i));
}
// 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,
"Test didn't exhaust all available memory\n"));
--i; // Back up to valid pointer
}
else
{
ACE_ASSERT (blocks[i] == 0);
ACE_ASSERT (errno == ENOMEM);
ACE_DEBUG ((LM_DEBUG, "ACE_NEW_RETURN failed properly at block %d\n",
i));
}
while (i >= 0)
delete [] blocks[i--];
#if defined (ACE_HAS_EXCEPTIONS)
}
catch (...)
{
ACE_ERROR ((LM_ERROR,
"Caught exception during test; "
"ACE_bad_alloc not defined correctly, or\n"));
ACE_ERROR ((LM_ERROR,
"ACE_NEW_THROWS_EXCEPTIONS is not #defined (and should be).\n"));
status = 1; // Mark test failure
}
#endif /* ACE_HAS_EXCEPTIONS */
#endif /* __SUNPRO_CC && !ACE_HAS_EXCEPTIONS */
ACE_END_TEST;
return status;
}
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