diff options
| -rw-r--r-- | build_keyboard.mk | 2 | ||||
| -rw-r--r-- | quantum/variable_trace.c | 108 |
2 files changed, 110 insertions, 0 deletions
diff --git a/build_keyboard.mk b/build_keyboard.mk index 282adcb118..461b17cd77 100644 --- a/build_keyboard.mk +++ b/build_keyboard.mk @@ -180,6 +180,8 @@ ifeq ($(strip $(SERIAL_LINK_ENABLE)), yes) VAPTH += $(SERIAL_PATH) endif +SRC += $(QUANTUM_DIR)/variable_trace.c + # Optimize size but this may cause error "relocation truncated to fit" #EXTRALDFLAGS = -Wl,--relax diff --git a/quantum/variable_trace.c b/quantum/variable_trace.c new file mode 100644 index 0000000000..dfa37bdef5 --- /dev/null +++ b/quantum/variable_trace.c @@ -0,0 +1,108 @@ +#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 +#define MAX_TRACE_SIZE 4 + +typedef struct { + const char* name; + void* addr; + unsigned size; + const char* func; + int line; + uint8_t last_value[MAX_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_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_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; + } +} |