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d1ca90ef75
gpgme/src/debug.h
Werner Koch 8b9f84828c
Fix compiler warnings about unused value in TRACE macros. 
* src/debug.h: Change macros to not have a literal 0 as last
expression of the comma operator.
* src/debug.c (_gpgme_debug_frame_end): Return 0.
(_gpgme_debug): Return 0.
--

Instead of using
   foo(), 0
for the trace macros we let foo() return 0 instead.

Signed-off-by: Werner Koch <wk@gnupg.org>
2015-06-08 11:08:08 +02:00

280 lines
11 KiB
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/* debug.h - interface to debugging functions
Copyright (C) 2002, 2004, 2005, 2007 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef DEBUG_H
#define DEBUG_H
#include <string.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include "gpgme.h" /* Required for gpgme_error stuff. */
/* Indirect stringification, requires __STDC__ to work. */
#define STRINGIFY(v) #v
#define XSTRINGIFY(v) STRINGIFY(v)
/* The debug levels. */
#define DEBUG_INIT 1
#define DEBUG_GLOBAL 2
#define DEBUG_CTX 3
#define DEBUG_ENGINE 4
#define DEBUG_DATA 5
#define DEBUG_ASSUAN 6
#define DEBUG_SYSIO 7
/* Remove path components from filenames (i.e. __FILE__) for cleaner
logs. */
static inline const char *_gpgme_debug_srcname (const char *file)
GPGME_GCC_A_PURE;
static inline const char *
_gpgme_debug_srcname (const char *file)
{
const char *s = strrchr (file, '/');
return s? s+1:file;
}
/* Initialization helper function; see debug.c. */
int _gpgme_debug_set_debug_envvar (const char *value);
/* Called early to initialize the logging. */
void _gpgme_debug_subsystem_init (void);
/* Log the formatted string FORMAT at debug level LEVEL or higher. */
int _gpgme_debug (int level, const char *format, ...);
/* Start a new debug line in *LINE, logged at level LEVEL or higher,
and starting with the formatted string FORMAT. */
void _gpgme_debug_begin (void **helper, int level, const char *format, ...);
/* Add the formatted string FORMAT to the debug line *LINE. */
void _gpgme_debug_add (void **helper, const char *format, ...);
/* Finish construction of *LINE and send it to the debug output
stream. */
void _gpgme_debug_end (void **helper);
void _gpgme_debug_buffer (int lvl, const char *const fmt,
const char *const func, const char *const buffer,
size_t len);
void _gpgme_debug_frame_begin (void);
int _gpgme_debug_frame_end (void);
static inline gpgme_error_t
_gpgme_trace_gpgme_error (gpgme_error_t err, const char *file, int line)
{
_gpgme_debug (DEBUG_ENGINE, "%s:%d: returning error: %s\n",
_gpgme_debug_srcname (file), line, gpgme_strerror (err));
return err;
}
/* Trace support. */
/* FIXME: For now. */
#define _gpgme_debug_trace() 1
#define _TRACE(lvl, name, tag) \
int _gpgme_trace_level = lvl; \
const char *const _gpgme_trace_func = name; \
const char *const _gpgme_trace_tagname = STRINGIFY (tag); \
void *_gpgme_trace_tag = (void *) (uintptr_t) tag; \
_gpgme_debug_frame_begin ()
#define TRACE_BEG(lvl, name, tag) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag)
#define TRACE_BEG0(lvl, name, tag, fmt) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag)
#define TRACE_BEG1(lvl, name, tag, fmt, arg1) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1)
#define TRACE_BEG2(lvl, name, tag, fmt, arg1, arg2) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2)
#define TRACE_BEG3(lvl, name, tag, fmt, arg1, arg2, arg3) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3)
#define TRACE_BEG4(lvl, name, tag, fmt, arg1, arg2, arg3, arg4) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3, arg4)
#define TRACE_BEG5(lvl, name, tag, fmt, arg1, arg2, arg3, arg4, arg5) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3, arg4, arg5)
#define TRACE_BEG7(lvl, name, tag, fmt, arg1, arg2, arg3, arg4, \
arg5, arg6, arg7) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3, arg4, arg5, arg6, arg7)
#define TRACE_BEG8(lvl, name, tag, fmt, arg1, arg2, arg3, arg4, \
arg5, arg6, arg7, arg8) \
_TRACE (lvl, name, tag); \
_gpgme_debug (_gpgme_trace_level, "%s: enter: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
#define TRACE(lvl, name, tag) \
_gpgme_debug_frame_begin (), \
_gpgme_debug (lvl, "%s: call: %s=%p\n", \
name, STRINGIFY (tag), (void *) (uintptr_t) tag), \
_gpgme_debug_frame_end ()
#define TRACE0(lvl, name, tag, fmt) \
_gpgme_debug_frame_begin (), \
_gpgme_debug (lvl, "%s: call: %s=%p, " fmt "\n", \
name, STRINGIFY (tag), (void *) (uintptr_t) tag), \
_gpgme_debug_frame_end ()
#define TRACE1(lvl, name, tag, fmt, arg1) \
_gpgme_debug_frame_begin (), \
_gpgme_debug (lvl, "%s: call: %s=%p, " fmt "\n", \
name, STRINGIFY (tag), (void *) (uintptr_t) tag, arg1), \
_gpgme_debug_frame_end ()
#define TRACE2(lvl, name, tag, fmt, arg1, arg2) \
_gpgme_debug_frame_begin (), \
_gpgme_debug (lvl, "%s: call: %s=%p, " fmt "\n", \
name, STRINGIFY (tag), (void *) (uintptr_t) tag, arg1, \
arg2), _gpgme_debug_frame_end ()
#define TRACE3(lvl, name, tag, fmt, arg1, arg2, arg3) \
_gpgme_debug_frame_begin (), \
_gpgme_debug (lvl, "%s: call: %s=%p, " fmt "\n", \
name, STRINGIFY (tag), (void *) (uintptr_t) tag, arg1, \
arg2, arg3), _gpgme_debug_frame_end ()
#define TRACE6(lvl, name, tag, fmt, arg1, arg2, arg3, arg4, arg5, arg6) \
_gpgme_debug_frame_begin (), \
_gpgme_debug (lvl, "%s: call: %s=%p, " fmt "\n", \
name, STRINGIFY (tag), (void *) (uintptr_t) tag, arg1, \
arg2, arg3, arg4, arg5, arg6), \
_gpgme_debug_frame_end ()
#define TRACE_ERR(err) \
err == 0 ? (TRACE_SUC ()) : \
(_gpgme_debug (_gpgme_trace_level, "%s:%d: error: %s <%s>\n", \
_gpgme_trace_func, __LINE__, gpgme_strerror (err), \
gpgme_strsource (err)), _gpgme_debug_frame_end (), (err))
/* The cast to void suppresses GCC warnings. */
#define TRACE_SYSRES(res) \
res >= 0 ? ((void) (TRACE_SUC1 ("result=%i", res)), (res)) : \
(_gpgme_debug (_gpgme_trace_level, "%s: error: %s\n", \
_gpgme_trace_func, strerror (errno)), _gpgme_debug_frame_end (), (res))
#define TRACE_SYSERR(res) \
res == 0 ? ((void) (TRACE_SUC1 ("result=%i", res)), (res)) : \
(_gpgme_debug (_gpgme_trace_level, "%s: error: %s\n", \
_gpgme_trace_func, strerror (res)), \
_gpgme_debug_frame_end (), (res))
#define TRACE_SUC() \
_gpgme_debug (_gpgme_trace_level, "%s: leave\n", \
_gpgme_trace_func), _gpgme_debug_frame_end ()
#define TRACE_SUC0(fmt) \
_gpgme_debug (_gpgme_trace_level, "%s: leave: " fmt "\n", \
_gpgme_trace_func), _gpgme_debug_frame_end ()
#define TRACE_SUC1(fmt, arg1) \
_gpgme_debug (_gpgme_trace_level, "%s: leave: " fmt "\n", \
_gpgme_trace_func, arg1), _gpgme_debug_frame_end ()
#define TRACE_SUC2(fmt, arg1, arg2) \
_gpgme_debug (_gpgme_trace_level, "%s: leave: " fmt "\n", \
_gpgme_trace_func, arg1, arg2), _gpgme_debug_frame_end ()
#define TRACE_SUC5(fmt, arg1, arg2, arg3, arg4, arg5) \
_gpgme_debug (_gpgme_trace_level, "%s: leave: " fmt "\n", \
_gpgme_trace_func, arg1, arg2, arg3, arg4, arg5), \
_gpgme_debug_frame_end ()
#define TRACE_SUC6(fmt, arg1, arg2, arg3, arg4, arg5, arg6) \
_gpgme_debug (_gpgme_trace_level, "%s: leave: " fmt "\n", \
_gpgme_trace_func, arg1, arg2, arg3, arg4, arg5, arg6), \
_gpgme_debug_frame_end ()
#define TRACE_LOG(fmt) \
_gpgme_debug (_gpgme_trace_level, "%s: check: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag)
#define TRACE_LOG1(fmt, arg1) \
_gpgme_debug (_gpgme_trace_level, "%s: check: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1)
#define TRACE_LOG2(fmt, arg1, arg2) \
_gpgme_debug (_gpgme_trace_level, "%s: check: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2)
#define TRACE_LOG3(fmt, arg1, arg2, arg3) \
_gpgme_debug (_gpgme_trace_level, "%s: check: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3)
#define TRACE_LOG4(fmt, arg1, arg2, arg3, arg4) \
_gpgme_debug (_gpgme_trace_level, "%s: check: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3, arg4)
#define TRACE_LOG5(fmt, arg1, arg2, arg3, arg4, arg5) \
_gpgme_debug (_gpgme_trace_level, "%s: check: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3, arg4, arg5)
#define TRACE_LOG6(fmt, arg1, arg2, arg3, arg4, arg5, arg6) \
_gpgme_debug (_gpgme_trace_level, "%s: check: %s=%p, " fmt "\n", \
_gpgme_trace_func, _gpgme_trace_tagname, _gpgme_trace_tag, \
arg1, arg2, arg3, arg4, arg5, arg6)
#define TRACE_LOGBUF(buf, len) \
_gpgme_debug_buffer (_gpgme_trace_level, "%s: check: %s", \
_gpgme_trace_func, buf, len)
#define TRACE_SEQ(hlp,fmt) \
_gpgme_debug_begin (&(hlp), _gpgme_trace_level, \
"%s: check: %s=%p, " fmt, _gpgme_trace_func, \
_gpgme_trace_tagname, _gpgme_trace_tag)
#define TRACE_ADD0(hlp,fmt) \
_gpgme_debug_add (&(hlp), fmt)
#define TRACE_ADD1(hlp,fmt,a) \
_gpgme_debug_add (&(hlp), fmt, (a))
#define TRACE_ADD2(hlp,fmt,a,b) \
_gpgme_debug_add (&(hlp), fmt, (a), (b))
#define TRACE_ADD3(hlp,fmt,a,b,c) \
_gpgme_debug_add (&(hlp), fmt, (a), (b), (c))
#define TRACE_END(hlp,fmt) \
_gpgme_debug_add (&(hlp), fmt); \
_gpgme_debug_end (&(hlp))
#define TRACE_ENABLED(hlp) (!!(hlp))
/* And finally a simple macro to trace the location of an error code.
This macro is independent of the other trace macros and may be used
without any preconditions. */
#define trace_gpg_error(e) \
_gpgme_trace_gpgme_error (gpg_error (e), __FILE__, __LINE__)
#endif /* DEBUG_H */
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