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Code Issues

Backported fix for CORE-2055: BOF in fbclient

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This commit is contained in:
alexpeshkoff 2008-09-15 13:53:49 +00:00
parent 316641f4fc
commit 33764ba4b8
1 changed files with 15 additions and 50 deletions
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65
src/remote/remote.cpp
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@ -46,8 +46,7 @@ int xdrmem_create(XDR *, SCHAR *, u_int, enum xdr_op);
const SLONG DUMMY_INTERVAL = 60; /* seconds */
const int ATTACH_FAILURE_SPACE = 2048; /* bytes */
static TEXT* attach_failures = NULL;
static TEXT* attach_failures_ptr;
static Firebird::StringsBuffer* attachFailures = NULL;
static void cleanup_memory(void*);
static SLONG get_parameter(const UCHAR**);
@ -643,55 +642,22 @@ void REMOTE_save_status_strings( ISC_STATUS* vector)
* strings to a special buffer.
*
**************************************/
if (!attach_failures)
if (!attachFailures)
{
attach_failures =
(TEXT*) ALLOC_LIB_MEMORY((SLONG) ATTACH_FAILURE_SPACE);
/* FREE: freed by exit handler cleanup_memory() */
if (!attach_failures) /* NOMEM: don't bother trying to copy */
try
{
attachFailures = FB_NEW(*getDefaultMemoryPool()) Firebird::CircularStringsBuffer<ATTACH_FAILURE_SPACE>;
/* FREE: freed by exit handler cleanup_memory() */
}
catch (const std::bad_alloc&) /* NOMEM: don't bother trying to copy */
{
return;
#ifdef DEBUG_GDS_ALLOC
/* This buffer is freed by the exit handler - but some of the
* reporting mechanisms will report it anyway, so flag it as
* "known unfreed" to get the reports quiet.
*/
gds_alloc_flag_unfreed((void*) attach_failures);
#endif /* DEBUG_GDS_ALLOC */
attach_failures_ptr = attach_failures;
}
gds__register_cleanup(cleanup_memory, 0);
}
TEXT* p;
USHORT l = 0; // silence non initialized warning
while (*vector)
{
const ISC_STATUS status = *vector++;
switch (status)
{
case isc_arg_cstring:
l = (USHORT) *vector++;
case isc_arg_interpreted:
case isc_arg_string:
p = (TEXT*) *vector;
if (status != isc_arg_cstring)
l = strlen(p) + 1;
/* If there isn't any more room in the buffer,
start at the beginning again */
if (attach_failures_ptr + l > attach_failures + ATTACH_FAILURE_SPACE)
attach_failures_ptr = attach_failures;
*vector++ = (ISC_STATUS) attach_failures_ptr;
memcpy(attach_failures_ptr, p, l);
attach_failures_ptr += l;
break;
default:
++vector;
break;
}
}
attachFailures->makePermanentVector(vector, vector);
}
@ -748,7 +714,7 @@ OBJCT REMOTE_set_object(rem_port* port, BLK object, OBJCT slot)
}
static void cleanup_memory( void *block)
static void cleanup_memory(void *)
{
/**************************************
*
@ -761,11 +727,10 @@ static void cleanup_memory( void *block)
*
**************************************/
if (attach_failures)
FREE_LIB_MEMORY(attach_failures);
delete attachFailures;
attachFailures = NULL;
gds__unregister_cleanup(cleanup_memory, 0);
attach_failures = NULL;
}