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[3DS] Free memory in smaller blocks when exiting

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This works around an occasional kernel panic when freeing larger
blocks.
This commit is contained in:
Justin Weiss 2020-10-25 16:06:28 -07:00
parent 179bc894ec
commit 082f83a08e
1 changed files with 13 additions and 2 deletions
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15
ctr/ctr_system.c
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@ -109,15 +109,26 @@ extern char** __system_argv;
void __attribute__((noreturn)) __libctru_exit(int rc)
{
u32 tmp = 0;
int size = 0;
if (__system_argv)
free(__system_argv);
/* Unmap the linear heap */
svcControlMemory(&tmp, __linear_heap, 0x0, __linear_heap_size, MEMOP_FREE, 0x0);
/* Do this 1MB at a time to avoid kernel panics, see https://github.com/LumaTeam/Luma3DS/issues/1504 */
while (__linear_heap_size > 0) {
size = __linear_heap_size < 0x100000 ? __linear_heap_size : 0x100000;
__linear_heap_size -= size;
svcControlMemory(&tmp, __linear_heap + __linear_heap_size, 0x0, size, MEMOP_FREE, 0x0);
}
/* Unmap the application heap */
svcControlMemory(&tmp, __heapBase, 0x0, __heap_size, MEMOP_FREE, 0x0);
/* Do this 1MB at a time to avoid kernel panics */
while (__heap_size > 0) {
size = __heap_size < 0x100000 ? __heap_size : 0x100000;
__heap_size -= size;
svcControlMemory(&tmp, __heapBase + __heap_size, 0x0, size, MEMOP_FREE, 0x0);
}
if (__stack_size_extra)
svcControlMemory(&tmp, __stack_bottom, 0x0, __stack_size_extra, MEMOP_FREE, 0x0);