djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

py/gc: Refactor assertions in gc_free function.

Browse Source 
gc_free() expects either NULL or a valid pointer into the heap, so the
checks for a valid pointer can be turned into assertions.
This commit is contained in:
Damien George 2017-07-12 12:17:38 +10:00
parent 1e6fd9f2b4
commit 12d4fa9b37
1 changed files with 25 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
py/gc.c
View File

@ -536,12 +536,18 @@ void gc_free(void *ptr) {
DEBUG_printf("gc_free(%p)\n", ptr);
if (VERIFY_PTR(ptr)) {
if (ptr == NULL) {
GC_EXIT();
} else {
// get the GC block number corresponding to this pointer
assert(VERIFY_PTR(ptr));
size_t block = BLOCK_FROM_PTR(ptr);
if (ATB_GET_KIND(block) == AT_HEAD) {
assert(ATB_GET_KIND(block) == AT_HEAD);
#if MICROPY_ENABLE_FINALISER
FTB_CLEAR(block);
#endif
// set the last_free pointer to this block if it's earlier in the heap
if (block / BLOCKS_PER_ATB < MP_STATE_MEM(gc_last_free_atb_index)) {
MP_STATE_MEM(gc_last_free_atb_index) = block / BLOCKS_PER_ATB;
@ -558,15 +564,6 @@ void gc_free(void *ptr) {
#if EXTENSIVE_HEAP_PROFILING
gc_dump_alloc_table();
#endif
} else {
GC_EXIT();
assert(!"bad free");
}
} else if (ptr != NULL) {
GC_EXIT();
assert(!"bad free");
} else {
GC_EXIT();
}
}