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#include "teensy_mem.h"
#include "teensy_common.h"
#include "teensy_list.h"
#define TEMP_ALLOC_ARENA_SIZE (1024*1024)
uint8_t temp_arena[TEMP_ALLOC_ARENA_SIZE];
uint8_t *next_temp_alloc = temp_arena;
#ifdef TEENSY_DEBUG
#include <execinfo.h>
#define BACKTRACE_SIZE 16
typedef struct {
void *ptr;
size_t size;
int backtrace_len;
char **backtrace;
} Alloc;
int allocations_cap;
int allocations_len;
Alloc *allocations;
#endif // TODO TEENSY_DEBUG
void ty_init_mem(void)
{
#ifdef TEENSY_DEBUG
allocations_len = 0;
allocations_cap = 8;
allocations = malloc(sizeof(Alloc) * 8);
if (!allocations)
ty_log_fatal(TY_ERR_MEM, "(%s) (track) ran out of memory", __func__);
#endif // TEENSY_DEBUG
}
void ty_deinit_mem(void)
{
#ifdef TEENSY_DEBUG
fprintf(stderr, "%d allocations leaked\n", allocations_len);
for (int i = 0; i < allocations_len; i++) {
Alloc *alloc = &allocations[i];
fprintf(
stderr,
"leaked %zu bytes at %p\n",
alloc->size,
alloc->ptr
);
for (int j = 0; j < alloc->backtrace_len; j++) {
fprintf(stderr, "\t%s\n", alloc->backtrace[j]);
}
putc('\n', stderr);
free(alloc->backtrace);
}
free(allocations);
if (allocations_len > 0)
exit(TY_ERR_MEM_LEAK);
#endif // TEENSY_DEBUG
}
void *ty_talloc(size_t size)
{
if (next_temp_alloc > temp_arena + TEMP_ALLOC_ARENA_SIZE)
ty_log_fatal(TY_ERR_MEM, "bump up the temp alloc arena size");
void *ptr = next_temp_alloc;
next_temp_alloc += size;
return ptr;
}
void ty_free_temp_allocs(void)
{
next_temp_alloc = temp_arena;
}
void *ty_alloc(size_t size)
{
if (size == 0)
ty_log_fatal(TY_ERR_MEM, "(%s) tried to allocate 0 bytes", __func__);
void *ptr = malloc(size);
if (!ptr)
ty_log_fatal(TY_ERR_MEM, "(%s) ran out of memory", __func__);
#ifdef TEENSY_DEBUG
// Log allocation
Alloc alloc;
void *bt[BACKTRACE_SIZE];
int bt_len = backtrace(bt, BACKTRACE_SIZE);
char **symbols = backtrace_symbols(bt, bt_len);
alloc.ptr = ptr;
alloc.size = size;
alloc.backtrace_len = bt_len;
alloc.backtrace = symbols;
if (allocations_len + 1 > allocations_cap) {
allocations_cap *= 2;
allocations = realloc(
allocations,
sizeof(Alloc) * allocations_cap
);
if (!allocations)
ty_log_fatal(
TY_ERR_MEM,
"(%s) (track) ran out of memory",
__func__
);
}
allocations[allocations_len++] = alloc;
#endif // TEENSY_DEBUG
return ptr;
}
void *ty_realloc(void *ptr, size_t new_size)
{
if (new_size == 0) {
ty_free(ptr);
return NULL;
}
void *new_ptr = realloc(ptr, new_size);
if (!new_ptr)
ty_log_fatal(TY_ERR_MEM, "(%s) ran out of memory", __func__);
#ifdef TEENSY_DEBUG
for (int i = 0; i < allocations_len; i++) {
Alloc *alloc = &allocations[i];
if (alloc->ptr == ptr) {
alloc->ptr = new_ptr;
alloc->size = new_size;
break;
}
}
#endif // TEENSY_DEBUG
return new_ptr;
}
void ty_free(void *ptr)
{
#ifdef TEENSY_DEBUG
bool double_free = true;
for (int i = 0; i < allocations_len; i++) {
Alloc *alloc = &allocations[i];
if (alloc->ptr == ptr) {
free(alloc->backtrace);
*alloc = allocations[allocations_len - 1];
allocations_len--;
double_free = false;
break;
}
}
if (double_free) {
ty_log_fatal(
TY_ERR_MEM,
"Double free or freed unowned memory (%p)",
ptr
);
}
#endif // TEENSY_DEBUG
free(ptr);
}
int ty_alloc_count(void)
{
#ifdef TEENSY_DEBUG
return allocations_len;
#else
return -1;
#endif
}
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