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/* Event-Based Branch Facility Tests.
*
* Copyright IBM Corp. 2013-2015
*
* The MIT License (MIT)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* Contributors:
* IBM Corporation, Adhemerval Zanella - Initial implementation.
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <execinfo.h>
#include <paf/ebb.h>
#include "ebb-callback.h"
#include "test_ebb_common.h"
#define PM_RUN_INST_CMPL 0x400FA
static inline int
match_sym (const char *sym, const char *name)
{
char *p = strchr (sym, '(');
return p != NULL && strstr (p, name) != NULL;
}
static inline int
match_lib (const char *sym, const char *name)
{
return strstr (sym, name) != NULL;
}
static volatile int ebb_handler_triggered = 0;
void
attribute_noinline
ebb_handler_backtrace (void *context)
{
int j, n;
#define NUM_FUNCTIONS 6
void *buffer[NUM_FUNCTIONS];
char **symbols;
int failed = 0;
n = backtrace (buffer, NUM_FUNCTIONS);
if (n < NUM_FUNCTIONS)
{
fprintf (stderr, "%s: backtrace() returned %i, expecting at least %i\n",
__FUNCTION__, n, NUM_FUNCTIONS);
failed = 1;
}
printf ("%s: backtrace() returned %d addresses\n", __FUNCTION__, n);
symbols = backtrace_symbols (buffer, NUM_FUNCTIONS);
if (symbols == NULL)
{
fprintf (stderr, "%s: backtrace_symbols() failed (ernro %i)\n",
__FUNCTION__, errno);
failed = 1;
}
for (j = 0; j < n; j++)
printf("%s [%i]: %s\n", __FUNCTION__, j, symbols[j]);
if (failed)
exit (EXIT_FAILURE);
/* Check if the function names make sense, the backtrace expected is:
test_paf_ebb_backtrace : ebb_handler_backtrace
libpaf-ebb.so : internal symbol (__paf_ebb_ebb_hook)
libpaf-ebb.so : internal symbol (__paf_ebb_callback_handler_gpr)
test_paf_ebb_backtrce : ebb_test_backtrace
libc.so ...
*/
if (!match_sym (symbols[0], "ebb_handler_backtrace"))
{
fprintf (stderr, "%s: symbol[0] (%s) does not match %s\n",
__FUNCTION__, symbols[0], "ebb_handler_backtrace");
exit (EXIT_FAILURE);
}
if (!match_lib (symbols[1], "libpaf-ebb.so") ||
!match_lib (symbols[2], "libpaf-ebb.so"))
{
fprintf (stderr, "%s: symbol[1] (%s) and symbol[2] (%s) "
"does not math %s\n", __FUNCTION__, symbols[1], symbols[2],
"libpaf_ebb.so");
exit (EXIT_FAILURE);
}
if (!match_sym (symbols[3], "ebb_test_backtrace"))
{
fprintf (stderr, "%s: symbol[3 || 4] (%s) does not match %s\n",
__FUNCTION__, symbols[0], "ebb_test_backtrace");
exit (EXIT_FAILURE);
}
free (symbols);
ebb_handler_triggered = 1;
}
int
ebb_test_backtrace (void)
{
ebbhandler_t handler;
int ebbfd;
ebbfd = paf_ebb_pmu_init (PM_RUN_INST_CMPL, -1);
if (ebbfd == -1)
{
printf("Error: paf_ebb_init_pmu (PM_RUN_CYC, -1) failed "
"(errno = %i)\n", errno);
return -1;
}
printf ("%s: testing backtrace information\n", __FUNCTION__);
ebb_handler_triggered = 0;
handler = paf_ebb_register_handler (ebb_handler_backtrace,
(void*)&ebb_handler_triggered,
PAF_EBB_CALLBACK_GPR_SAVE, 0);
if (handler != ebb_handler_backtrace)
{
printf ("Error: paf_ebb_register_handler \
(ebb_handler_test) != handler\n");
return -1;
}
paf_ebb_enable_branches ();
while (ebb_handler_triggered == 0)
{
if (ebb_check_mmcr0())
return 1;
}
paf_ebb_disable_branches ();
return 0;
}
#define EBB_TEST ebb_test_backtrace
#include "test_ebb-skeleton.c"
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