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/* -*- c-file-style: "GNU" -*- */
/*
* Copyright (C) CNRS, INRIA, Université Bordeaux 1, Télécom SudParis
* See COPYING in top-level directory.
*/
/* This file contains an alternative libexample.so
* The functions defined in libexample (example_function1 and
* example_function2) are redefined so that when the application
* call one of these functions, the hereby version of it is actually
* invoked.
*/
#include <eztrace-core/eztrace_config.h>
#include <eztrace-lib/eztrace.h>
#include <eztrace-lib/eztrace_module.h>
#define CURRENT_MODULE example
DECLARE_CURRENT_MODULE;
int __example_initialized = 0;
/* pointers to the actual functions (located in the original
* libexample.so)
*/
double (*libexample_function1)(double*, int) = NULL;
double (*libexample_static_function)(double*, int) = NULL;
int (*libexample_function2)(int*, int) = NULL;
/* redefine example_function1.
* This version of the function only record some events and calls
* the original example_function1 function
*/
double example_function1(double *array, int array_size) {
/* records an event with two parameters
*/
FUNCTION_ENTRY_WITH_ARGS(array, array_size);
/* call the actual function (located in the original libexample.so) */
double ret = libexample_function1(array, array_size);
/* records another event without any parameter
*/
FUNCTION_EXIT;
return ret;
}
double example_static_function(double*array, int array_size) {
FUNCTION_ENTRY_WITH_ARGS(array, array_size);
/* call the actual function (located in the original libexample.so) */
double ret = libexample_static_function(array, array_size);
/* record another event with three parameters
*/
FUNCTION_EXIT_WITH_ARGS(array, array_size, ret);
return ret;
}
/* redefine example_function2.
* This version of the function only record some events and calls
* the original example_function2 function
*/
int example_function2(int *array, int array_size) {
FUNCTION_ENTRY_WITH_ARGS(array, array_size);
int ret = libexample_function2(array, array_size);
FUNCTION_EXIT;
return ret;
}
PPTRACE_START_INTERCEPT_FUNCTIONS(example)
INTERCEPT3("example_function1", libexample_function1)
INTERCEPT3("example_static_function", libexample_static_function)
INTERCEPT3("example_function2", libexample_function2)
PPTRACE_END_INTERCEPT_FUNCTIONS(example);
static void init_example() {
INSTRUMENT_FUNCTIONS(example);
if (eztrace_autostart_enabled())
eztrace_start();
__example_initialized = 1;
}
static void finalize_example() {
__example_initialized = 0;
eztrace_stop();
}
void __example_init(void) __attribute__ ((constructor));
/* Initialize the current library */
void __example_init(void) {
EZT_REGISTER_MODULE(example, "Example module", init_example, finalize_example);
}
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