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ca09e01a13
If the OpenTracing filter is compiled using the 'OT_DEBUG=1' option, then
log messages are printed to stderr when the filter is running. In the log
one can then find (among other things) the order in which the function is
called and the value that the function returns (if it is not a void type).
Prior to applying this patch, no value returned by a function was logged.
Log output example:
[ 1] 0.038807 [OT]: flt_ot_init_per_thread(0x56365bd45ec0, 0x56365bd48210) {
[ 1] 0.038807 [OT]: ot_start(0x56365bd58920, 0x56365bd4e3a0, 0x7f561acba168:(nil)) {
[ 1] 0.038807 [OT]: } = 0
[ 1] 0.038807 [OT]: } = 0
This patch must be backported as far as 2.4.
224 lines
4.4 KiB
C
224 lines
4.4 KiB
C
/***
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* Copyright 2020 HAProxy Technologies
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*
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* This file is part of the HAProxy OpenTracing filter.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "include.h"
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/***
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* NAME
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* flt_ot_pool_alloc -
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*
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* ARGUMENTS
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* pool -
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* size -
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* flag_clear -
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* err -
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*
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* DESCRIPTION
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* -
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*
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* RETURN VALUE
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* -
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*/
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void *flt_ot_pool_alloc(struct pool_head *pool, size_t size, bool flag_clear, char **err)
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{
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void *retptr;
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FLT_OT_FUNC("%p, %zu, %hhu, %p:%p", pool, size, flag_clear, FLT_OT_DPTR_ARGS(err));
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if (pool != NULL) {
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retptr = pool_alloc(pool);
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if (retptr != NULL)
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FLT_OT_DBG(2, "POOL_ALLOC: %s:%d(%p %zu)", __func__, __LINE__, retptr, FLT_OT_DEREF(pool, size, size));
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} else {
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retptr = FLT_OT_MALLOC(size);
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}
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if (retptr == NULL)
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FLT_OT_ERR("out of memory");
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else if (flag_clear)
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(void)memset(retptr, 0, size);
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FLT_OT_RETURN_PTR(retptr);
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}
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/***
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* NAME
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* flt_ot_pool_strndup -
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*
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* ARGUMENTS
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* pool -
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* s -
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* size -
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* err -
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*
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* DESCRIPTION
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* -
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*
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* RETURN VALUE
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* -
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*/
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void *flt_ot_pool_strndup(struct pool_head *pool, const char *s, size_t size, char **err)
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{
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void *retptr;
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FLT_OT_FUNC("%p, \"%.*s\", %zu, %p:%p", pool, (int)size, s, size, FLT_OT_DPTR_ARGS(err));
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if (pool != NULL) {
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retptr = pool_alloc(pool);
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if (retptr != NULL) {
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(void)memcpy(retptr, s, MIN(pool->size - 1, size));
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((uint8_t *)retptr)[MIN(pool->size - 1, size)] = '\0';
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}
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} else {
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retptr = FLT_OT_STRNDUP(s, size);
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}
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if (retptr != NULL)
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FLT_OT_DBG(2, "POOL_STRNDUP: %s:%d(%p %zu)", __func__, __LINE__, retptr, FLT_OT_DEREF(pool, size, size));
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else
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FLT_OT_ERR("out of memory");
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FLT_OT_RETURN_PTR(retptr);
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}
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/***
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* NAME
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* flt_ot_pool_free -
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*
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* ARGUMENTS
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* pool -
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* ptr -
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*
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* DESCRIPTION
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* -
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*
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* RETURN VALUE
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* This function does not return a value.
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*/
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void flt_ot_pool_free(struct pool_head *pool, void **ptr)
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{
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FLT_OT_FUNC("%p, %p:%p", pool, FLT_OT_DPTR_ARGS(ptr));
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if ((ptr == NULL) || (*ptr == NULL))
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FLT_OT_RETURN();
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FLT_OT_DBG(2, "POOL_FREE: %s:%d(%p %u)", __func__, __LINE__, *ptr, FLT_OT_DEREF(pool, size, 0));
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if (pool != NULL)
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pool_free(pool, *ptr);
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else
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FLT_OT_FREE(*ptr);
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*ptr = NULL;
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FLT_OT_RETURN();
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}
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/***
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* NAME
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* flt_ot_trash_alloc -
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*
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* ARGUMENTS
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* flag_clear -
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* err -
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*
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* DESCRIPTION
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* -
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*
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* RETURN VALUE
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* -
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*/
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struct buffer *flt_ot_trash_alloc(bool flag_clear, char **err)
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{
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struct buffer *retptr;
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FLT_OT_FUNC("%hhu, %p:%p", flag_clear, FLT_OT_DPTR_ARGS(err));
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#ifdef USE_TRASH_CHUNK
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retptr = alloc_trash_chunk();
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if (retptr != NULL)
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FLT_OT_DBG(2, "TRASH_ALLOC: %s:%d(%p %zu)", __func__, __LINE__, retptr, retptr->size);
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#else
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retptr = FLT_OT_MALLOC(sizeof(*retptr));
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if (retptr != NULL) {
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chunk_init(retptr, FLT_OT_MALLOC(global.tune.bufsize), global.tune.bufsize);
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if (retptr->area == NULL)
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FLT_OT_FREE_CLEAR(retptr);
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else
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*(retptr->area) = '\0';
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}
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#endif
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if (retptr == NULL)
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FLT_OT_ERR("out of memory");
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else if (flag_clear)
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(void)memset(retptr->area, 0, retptr->size);
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FLT_OT_RETURN_PTR(retptr);
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}
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/***
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* NAME
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* flt_ot_trash_free -
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*
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* ARGUMENTS
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* ptr -
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*
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* DESCRIPTION
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* -
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*
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* RETURN VALUE
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* This function does not return a value.
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*/
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void flt_ot_trash_free(struct buffer **ptr)
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{
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FLT_OT_FUNC("%p:%p", FLT_OT_DPTR_ARGS(ptr));
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if ((ptr == NULL) || (*ptr == NULL))
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FLT_OT_RETURN();
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FLT_OT_DBG(2, "TRASH_FREE: %s:%d(%p %zu)", __func__, __LINE__, *ptr, (*ptr)->size);
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#ifdef USE_TRASH_CHUNK
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free_trash_chunk(*ptr);
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#else
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FLT_OT_FREE((*ptr)->area);
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FLT_OT_FREE(*ptr);
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#endif
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*ptr = NULL;
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FLT_OT_RETURN();
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}
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*
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* vi: noexpandtab shiftwidth=8 tabstop=8
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*/
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