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gc: More verbose debugging 

Add more DEBUG_printf statements to trace gc behaviour
This commit is contained in:
stijn 2014-06-16 10:44:29 +02:00
parent 2547928148
commit bbcea3f62b
1 changed files with 5 additions and 3 deletions
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8
py/gc.c
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@ -113,7 +113,6 @@ STATIC machine_uint_t gc_lock_depth;
void gc_init(void *start, void *end) {
// align end pointer on block boundary
end = (void*)((machine_uint_t)end & (~(BYTES_PER_BLOCK - 1)));
DEBUG_printf("Initializing GC heap: %p..%p = " UINT_FMT " bytes\n", start, end, end - start);
// calculate parameters for GC (T=total, A=alloc table, F=finaliser table, P=pool; all in bytes):
// T = A + F + P
@ -121,6 +120,7 @@ void gc_init(void *start, void *end) {
// P = A * BLOCKS_PER_ATB * BYTES_PER_BLOCK
// => T = A * (1 + BLOCKS_PER_ATB / BLOCKS_PER_FTB + BLOCKS_PER_ATB * BYTES_PER_BLOCK)
machine_uint_t total_byte_len = (byte*)end - (byte*)start;
DEBUG_printf("Initializing GC heap: %p..%p = " UINT_FMT " bytes\n", start, end, total_byte_len);
#if MICROPY_ENABLE_FINALISER
gc_alloc_table_byte_len = total_byte_len * BITS_PER_BYTE / (BITS_PER_BYTE + BITS_PER_BYTE * BLOCKS_PER_ATB / BLOCKS_PER_FTB + BITS_PER_BYTE * BLOCKS_PER_ATB * BYTES_PER_BLOCK);
#else
@ -268,6 +268,7 @@ STATIC void gc_sweep(void) {
case AT_TAIL:
if (free_tail) {
DEBUG_printf("gc_sweep(%p)\n",PTR_FROM_BLOCK(block));
ATB_ANY_TO_FREE(block);
}
break;
@ -347,7 +348,6 @@ void gc_info(gc_info_t *info) {
void *gc_alloc(machine_uint_t n_bytes, bool has_finaliser) {
machine_uint_t n_blocks = ((n_bytes + BYTES_PER_BLOCK - 1) & (~(BYTES_PER_BLOCK - 1))) / BYTES_PER_BLOCK;
DEBUG_printf("gc_alloc(" UINT_FMT " bytes -> " UINT_FMT " blocks)\n", n_bytes, n_blocks);
// check if GC is locked
if (gc_lock_depth > 0) {
@ -401,6 +401,7 @@ found:
// get pointer to first block
void *ret_ptr = (void*)(gc_pool_start + start_block * WORDS_PER_BLOCK);
DEBUG_printf("gc_alloc(" UINT_FMT " bytes -> " UINT_FMT " blocks ptr %p)\n", n_bytes, n_blocks, ret_ptr);
// zero out the additional bytes of the newly allocated blocks
// This is needed because the blocks may have previously held pointers
@ -439,6 +440,7 @@ void gc_free(void *ptr_in) {
}
machine_uint_t ptr = (machine_uint_t)ptr_in;
DEBUG_printf("gc_free(%p)\n", ptr);
if (VERIFY_PTR(ptr)) {
machine_uint_t block = BLOCK_FROM_PTR(ptr);
@ -590,7 +592,7 @@ void *gc_realloc(void *ptr_in, machine_uint_t n_bytes) {
return NULL;
}
DEBUG_printf("gc_realloc: allocating new block\n");
DEBUG_printf("gc_realloc(%p -> %p)\n", ptr_in, ptr_out);
memcpy(ptr_out, ptr_in, n_blocks * BYTES_PER_BLOCK);
gc_free(ptr_in);
return ptr_out;