You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
4.0 KiB
123 lines
4.0 KiB
/* Copyright 2016 Fred Sundvik |
|
* |
|
* This program is free software: you can redistribute it and/or modify |
|
* it under the terms of the GNU General Public License as published by |
|
* the Free Software Foundation, either version 2 of the License, or |
|
* (at your option) any later version. |
|
* |
|
* This program 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 General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU General Public License |
|
* along with this program. If not, see <http://www.gnu.org/licenses/>. |
|
*/ |
|
|
|
#include "variable_trace.h" |
|
#include <stddef.h> |
|
#include <string.h> |
|
|
|
#ifdef NO_PRINT |
|
# error "You need undef NO_PRINT to use the variable trace feature" |
|
#endif |
|
|
|
#ifndef CONSOLE_ENABLE |
|
# error "The console needs to be enabled in the makefile to use the variable trace feature" |
|
#endif |
|
|
|
#define NUM_TRACED_VARIABLES 1 |
|
#ifndef MAX_VARIABLE_TRACE_SIZE |
|
# define MAX_VARIABLE_TRACE_SIZE 4 |
|
#endif |
|
|
|
typedef struct { |
|
const char* name; |
|
void* addr; |
|
unsigned size; |
|
const char* func; |
|
int line; |
|
uint8_t last_value[MAX_VARIABLE_TRACE_SIZE]; |
|
|
|
} traced_variable_t; |
|
|
|
static traced_variable_t traced_variables[NUM_TRACED_VARIABLES]; |
|
|
|
void add_traced_variable(const char* name, void* addr, unsigned size, const char* func, int line) { |
|
verify_traced_variables(func, line); |
|
if (size > MAX_VARIABLE_TRACE_SIZE) { |
|
#if defined(__AVR__) |
|
xprintf("Traced variable \"%S\" exceeds the maximum size %d\n", name, size); |
|
#else |
|
xprintf("Traced variable \"%s\" exceeds the maximum size %d\n", name, size); |
|
#endif |
|
size = MAX_VARIABLE_TRACE_SIZE; |
|
} |
|
int index = -1; |
|
for (int i = 0; i < NUM_TRACED_VARIABLES; i++) { |
|
if (index == -1 && traced_variables[i].addr == NULL) { |
|
index = i; |
|
} else if (strcmp_P(name, traced_variables[i].name) == 0) { |
|
index = i; |
|
break; |
|
} |
|
} |
|
|
|
if (index == -1) { |
|
xprintf("You can only trace %d variables at the same time\n", NUM_TRACED_VARIABLES); |
|
return; |
|
} |
|
|
|
traced_variable_t* t = &traced_variables[index]; |
|
t->name = name; |
|
t->addr = addr; |
|
t->size = size; |
|
t->func = func; |
|
t->line = line; |
|
memcpy(&t->last_value[0], addr, size); |
|
} |
|
|
|
void remove_traced_variable(const char* name, const char* func, int line) { |
|
verify_traced_variables(func, line); |
|
for (int i = 0; i < NUM_TRACED_VARIABLES; i++) { |
|
if (strcmp_P(name, traced_variables[i].name) == 0) { |
|
traced_variables[i].name = 0; |
|
traced_variables[i].addr = NULL; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
void verify_traced_variables(const char* func, int line) { |
|
for (int i = 0; i < NUM_TRACED_VARIABLES; i++) { |
|
traced_variable_t* t = &traced_variables[i]; |
|
if (t->addr != NULL && t->name != NULL) { |
|
if (memcmp(t->last_value, t->addr, t->size) != 0) { |
|
#if defined(__AVR__) |
|
xprintf("Traced variable \"%S\" has been modified\n", t->name); |
|
xprintf("Between %S:%d\n", t->func, t->line); |
|
xprintf("And %S:%d\n", func, line); |
|
|
|
#else |
|
xprintf("Traced variable \"%s\" has been modified\n", t->name); |
|
xprintf("Between %s:%d\n", t->func, t->line); |
|
xprintf("And %s:%d\n", func, line); |
|
#endif |
|
xprintf("Previous value "); |
|
for (int j = 0; j < t->size; j++) { |
|
print_hex8(t->last_value[j]); |
|
} |
|
xprintf("\nNew value "); |
|
uint8_t* addr = (uint8_t*)(t->addr); |
|
for (int j = 0; j < t->size; j++) { |
|
print_hex8(addr[j]); |
|
} |
|
xprintf("\n"); |
|
memcpy(t->last_value, addr, t->size); |
|
} |
|
} |
|
|
|
t->func = func; |
|
t->line = line; |
|
} |
|
}
|
|
|