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// @(#)except.cpp 1.11 95/11/04
// Copyright 1994-1995 by Sun Microsystems Inc.
// All Rights Reserved
//
// ORB: Exception handling support
//
// THREADING NOTE: calling thread handles mutual exclusion policy
// on all of these data structures.
#include <assert.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include "ace/Log_Msg.h"
#include <orb.h>
#include "cdr.h"
#include <initguid.h>
#if defined (HAVE_WIDEC_H)
# include <widec.h>
#endif
// {77420082-F276-11ce-9598-0000C07CA898}
DEFINE_GUID (IID_CORBA_Exception,
0x77420082, 0xf276, 0x11ce, 0x95, 0x98, 0x0, 0x0, 0xc0, 0x7c, 0xa8, 0x98);
// {77420083-F276-11ce-9598-0000C07CA898}
DEFINE_GUID (IID_CORBA_UserException,
0x77420083, 0xf276, 0x11ce, 0x95, 0x98, 0x0, 0x0, 0xc0, 0x7c, 0xa8, 0x98);
// {77420084-F276-11ce-9598-0000C07CA898}
DEFINE_GUID (IID_CORBA_SystemException,
0x77420084, 0xf276, 0x11ce, 0x95, 0x98, 0x0, 0x0, 0xc0, 0x7c, 0xa8, 0x98);
CORBA_Exception::CORBA_Exception (CORBA_TypeCode_ptr tc)
: _type (tc),
_refcnt (1)
{
if (_type)
_type->AddRef ();
assert (_type != 0);
assert (_refcnt > 0);
}
CORBA_Exception::CORBA_Exception (const CORBA_Exception &src)
: _type (src._type),
_refcnt (1)
{
if (_type)
_type->AddRef ();
assert (_type != 0);
assert (_refcnt > 0);
}
// NOTE: It's this code, not anything defined in a subclass, which
// is responsible for releasing any storage owned by the exception.
// It can do this because it's got the typecode.
CORBA_Exception::~CORBA_Exception (void)
{
assert (_refcnt == 0);
assert (_type != 0);
assert (1 == 2);
}
CORBA_Exception &
CORBA_Exception::operator = (const CORBA_Exception &src)
{
if (_type)
_type->Release ();
_type = src._type;
if (_type)
_type->AddRef ();
assert (_type != 0);
assert (_refcnt > 0);
return *this;
}
const CORBA_String
CORBA_Exception::id (void) const
{
CORBA_Environment env;
assert (_refcnt > 0);
if (_type)
return _type->id (env);
else
return 0;
}
const CORBA_TypeCode_ptr
CORBA_Exception::type (void) const
{
assert (_refcnt > 0);
return _type;
}
// For COM -- IUnKnown operations
ULONG __stdcall
CORBA_Exception::AddRef (void)
{
ACE_GUARD_RETURN(ACE_Thread_Mutex, guard, lock_, 0);
assert (_refcnt > 0);
return ++_refcnt;
}
ULONG __stdcall
CORBA_Exception::Release (void)
{
ACE_GUARD_RETURN(ACE_Thread_Mutex, guard, lock_, 0);
assert (_refcnt > 0);
_refcnt--;
if (_refcnt != 0)
return _refcnt;
guard.release ();
// CORBA_TypeCode_ptr tc = _type->_duplicate ();
{
CORBA_Any free_it_all (_type, this, CORBA_B_TRUE);
}
// tc->Release ();
return 0;
}
HRESULT __stdcall
CORBA_Exception::QueryInterface (REFIID riid,
void **ppv)
{
assert (_refcnt > 0);
*ppv = 0;
if (IID_CORBA_Exception == riid || IID_IUnknown == riid)
*ppv = this;
// XXX this approach needs modifying to enable returning
// UserException, SystemException, and other kinds of pointers.
if (*ppv == 0)
return ResultFromScode (E_NOINTERFACE);
(void) AddRef ();
return NOERROR;
}
// Avoid zillions of not-quite-inlined copies of utilities.
CORBA_UserException::CORBA_UserException (CORBA_TypeCode_ptr tc)
: CORBA_Exception (tc)
{
}
CORBA_UserException::~CORBA_UserException (void)
{
}
CORBA_SystemException::CORBA_SystemException (CORBA_TypeCode_ptr tc,
CORBA_ULong code,
CORBA_CompletionStatus completed)
: _minor (code),
_completed (completed),
CORBA_Exception (tc)
{
}
CORBA_SystemException::~CORBA_SystemException (void)
{
}
#define NUM_SYS_EXCEPTIONS 26 // update correctly!
#define TC_BUFLEN 160 // preallocated tc buffer
static CORBA_TypeCode_ptr sys_exceptions [NUM_SYS_EXCEPTIONS];
CORBA_ExceptionList __system_exceptions;
// Make the TypeCode for a standard exception ... note that "buffer"
// holds the (unscoped) name originally, and is then overwritten.
//
// When used correctly, initializing system exceptions is only an
// exercise in CPU time; it allocates no new memory.
static void
make_standard_typecode (CORBA_TypeCode_ptr tcp,
const char *name,
unsigned char *buffer,
size_t buflen,
CORBA_Environment &env)
{
static const char *minor = "minor";
static const char *completion = "completion";
static const unsigned long oc_completion_status [] =
{
1, // byte order flag, tricky
0, 0, // type ID omitted
3, // three members
0, 0, // ... whose names are all omitted
0, 0,
0, 0
};
static CORBA_TypeCode
tc_completion_status (tk_enum,
sizeof oc_completion_status,
(unsigned char *) &oc_completion_status,
CORBA_B_FALSE);
static const CORBA_TypeCode_ptr completion_status = &tc_completion_status;
// Create a CDR stream ... juggle the alignment here a bit, we
// know it's good enough for tye typecode.
CDR stream (0, buflen);
stream.next = stream.buffer = buffer;
// into CDR stream, stuff (in order):
// - byte order flag [4 bytes]
// - exception ID [27 + N bytes]
// - exception name [4 + N bytes ]
// - number of members (2) [4 bytes ]
// - foreach member, { name string, typecode } [~40 bytes]
char full_id [100], *strptr = (char *) &full_id;
(void) ACE_OS::sprintf (full_id, "IDL:omg.org/CORBA/%s:1.0", name);
assert (strlen (full_id) <= sizeof full_id);
if (stream.put_byte (MY_BYTE_SEX) != CORBA_B_TRUE
|| stream.encode (_tc_CORBA_String,
&strptr, 0,
env) != CORBA_TypeCode::TRAVERSE_CONTINUE
|| stream.encode (_tc_CORBA_String,
&name, 0,
env) != CORBA_TypeCode::TRAVERSE_CONTINUE
|| stream.put_ulong (2L) != CORBA_B_TRUE
|| stream.encode (_tc_CORBA_String,
&minor, 0,
env) != CORBA_TypeCode::TRAVERSE_CONTINUE
|| stream.encode (_tc_CORBA_TypeCode,
&_tc_CORBA_ULong, 0,
env) != CORBA_TypeCode::TRAVERSE_CONTINUE
|| stream.encode (_tc_CORBA_String,
&completion, 0,
env) != CORBA_TypeCode::TRAVERSE_CONTINUE
|| stream.encode (_tc_CORBA_TypeCode,
&completion_status, 0,
env) != CORBA_TypeCode::TRAVERSE_CONTINUE) {
env.exception (new CORBA_INITIALIZE (COMPLETED_NO));
return;
}
// OK, we stuffed the buffer we were given (or grew a bigger one;
// hope to avoid that during initialization). Now build and return
// a TypeCode, saving it away in the list of ones that the ORB will
// always accept as part of any operation response!
sys_exceptions [__system_exceptions.length++]
= new (tcp) CORBA_TypeCode (tk_except,
stream.next - stream.buffer,
stream.buffer, CORBA_B_FALSE);
assert (tcp->_length <= TC_BUFLEN);
return;
}
// List of standard/system exceptions ... used to create static
// storage for their typecodes, then later to initialize that storage
// using the routine above. (It's just too painful to init these
// typecodes statically in all cases!)
#define STANDARD_EXCEPTION_LIST \
SYSEX (UNKNOWN) \
SYSEX (BAD_PARAM) \
SYSEX (NO_MEMORY) \
SYSEX (IMP_LIMIT) \
SYSEX (COMM_FAILURE) \
SYSEX (INV_OBJREF) \
SYSEX (OBJECT_NOT_EXIST) \
SYSEX (NO_PERMISSION) \
SYSEX (INTERNAL) \
SYSEX (MARSHAL) \
SYSEX (INITIALIZE) \
SYSEX (NO_IMPLEMENT) \
SYSEX (BAD_TYPECODE) \
SYSEX (BAD_OPERATION) \
SYSEX (NO_RESOURCES) \
SYSEX (NO_RESPONSE) \
SYSEX (PERSIST_STORE) \
SYSEX (BAD_INV_ORDER) \
SYSEX (TRANSIENT) \
SYSEX (FREE_MEM) \
SYSEX (INV_IDENT) \
SYSEX (INV_FLAG) \
SYSEX (INTF_REPOS) \
SYSEX (BAD_CONTEXT) \
SYSEX (OBJ_ADAPTER) \
SYSEX (DATA_CONVERSION)
// Declare static storage for these ... the buffer is "naturally"
// aligned and overwritten.
//
// XXX this actually doesn't guarantee "natural" alignment, but
// it works that way in most systems.
#define SYSEX(name) \
static long tc_buf_ ## name [TC_BUFLEN / sizeof (long)]; \
static CORBA_TypeCode tc_std_ ## name (tk_except); \
CORBA_TypeCode_ptr _tc_CORBA_ ## name = &tc_std_ ## name;
STANDARD_EXCEPTION_LIST
#undef SYSEX
// Runtime initialization of all standard exception typecodes. Called
// from CORBA::ORB::init().
void
__TC_init_standard_exceptions (CORBA_Environment &env)
{
// Initialize the list of system exceptions, used when
// unmarshaling.
__system_exceptions.length = 0;
__system_exceptions.maximum = NUM_SYS_EXCEPTIONS;
__system_exceptions.buffer = &sys_exceptions [0];
// Initialize the typecodes.
#define SYSEX(name) \
if (env.exception () == 0) \
make_standard_typecode (&tc_std_ ## name, #name, \
(unsigned char *) tc_buf_ ## name, \
sizeof tc_buf_ ## name, env);
STANDARD_EXCEPTION_LIST
#undef SYSEX
}
#undef STANDARD_EXCEPTION_LIST
// Static initialization of the two user-defined exceptions that
// are part of the ORB.
static CORBA_Octet tc_buf_Bounds [] =
{
0, 0, 0, 0, // big endian, padded
0, 0, 0, 38, // strlen (id) + 1
'I', 'D', 'L', ':',
'o', 'm', 'g', '.',
'o', 'r', 'g', '/',
'C', 'O', 'R', 'B',
'A', '/', 'T', 'y',
'p', 'e', 'C', 'o',
'd', 'e', '/', 'B',
'o', 'u', 'n', 'd',
's', ':', '1', '.',
'0', '\0', 0, 0,
0, 0, 0, 0 // no members to this typecode
};
static CORBA_TypeCode tc_std_Bounds (tk_except,
sizeof tc_buf_Bounds,
tc_buf_Bounds,
CORBA_B_FALSE);
CORBA_TypeCode_ptr _tc_CORBA_Bounds = &tc_std_Bounds;
static CORBA_Octet tc_buf_BadKind [] =
{
0, 0, 0, 0, // big endian, padded
0, 0, 0, 39, // strlen (id) + 1
'I', 'D', 'L', ':',
'o', 'm', 'g', '.',
'o', 'r', 'g', '/',
'C', 'O', 'R', 'B',
'A', '/', 'T', 'y',
'p', 'e', 'C', 'o',
'd', 'e', '/', 'B',
'a', 'd', 'K', 'i',
'n', 'd', ':', '1',
'.', '0', '\0', 0,
0, 0, 0, 0 // no members to this typecode
};
static CORBA_TypeCode tc_std_BadKind (tk_except,
sizeof tc_buf_BadKind,
tc_buf_BadKind,
CORBA_B_FALSE);
CORBA_TypeCode_ptr _tc_CORBA_BadKind = &tc_std_BadKind;
// Convenience -- say if the exception is a system exception or not.
CORBA_ExceptionType
CORBA_Environment::exception_type (void) const
{
static char sysex_prefix [] = "IDL:omg.org/CORBA/";
static char typecode_extra [] = "TypeCode/";
if (!_exception)
return NO_EXCEPTION;
// All exceptions currently (CORBA 2.0) defined in the CORBA
// scope are system exceptions ... except for a couple that
// are related to TypeCodes.
char *id = _exception->id ();
if (ACE_OS::strncmp (id, sysex_prefix, sizeof sysex_prefix - 1) == 0
&& ACE_OS::strncmp (id + sizeof sysex_prefix - 1,
typecode_extra, sizeof typecode_extra - 1) != 0)
return SYSTEM_EXCEPTION;
return USER_EXCEPTION;
}
// Diagnostic utility routine: describe the exception onto
// the standard I/O stream passed as a parameter.
//
// XXX make this a member function on "Environment"
void _EXPFUNC
print_exception (const CORBA_Exception *x,
const char *info,
FILE *stream)
{
CORBA_String id = x->id ();
ACE_DEBUG ((LM_ERROR, "EXCEPTION, %s\n", info));
// XXX get rid of this logic, and rely on some member function
// on Exception to say if it's user or system exception.
if (ACE_OS::strncmp ((char *) id, "IDL:omg.org/CORBA/", 10) == 0
&& ACE_OS::strncmp ((char *) id, "IDL:omg.org/CORBA/TypeCode/", 19) != 0)
{
// XXX this should be a QueryInterface call instead
CORBA_SystemException *x2 = (CORBA_SystemException *) x;
// XXX there are a other few "user exceptions" in the CORBA
// scope, they're not all standard/system exceptions ... really
// need to either compare exhaustively against all those IDs
// (yeech) or (preferably) to represent the exception type
// directly in the exception value so it can be queried.
ACE_DEBUG ((LM_ERROR, "ACE_OS::system exception, ID '%s'\n", id));
ACE_DEBUG ((LM_ERROR, "minor code = %#lx, completed = ", x2->minor ()));
switch (x2->completion ())
{
case COMPLETED_YES:
fputs ("YES", stream);
break;
case COMPLETED_NO:
fputs ("NO", stream);
break;
case COMPLETED_MAYBE:
fputs ("MAYBE", stream);
break;
default:
fputs ("**garbage**", stream);
break;
}
fputc ('\n', stream);
}
else
// XXX we can use the exception's typecode to dump all the data
// held within it ...
ACE_DEBUG ((LM_ERROR, "user exception, ID '%s'\n", id));
}
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