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Fix broken mp_stack_check: force mp_stack_ctrl_init() and mp_stack_usage() not to be inlined even with -flto

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This commit is contained in:
Dan Halbert 2017-06-04 22:05:55 -04:00
parent 66c421f401
commit 88b449a8cd
1 changed files with 4 additions and 0 deletions
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4
py/stackctrl.c
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@ -31,6 +31,8 @@
#include "py/stackctrl.h"
void mp_stack_ctrl_init(void) {
// Force routine to not be inlined. Better guarantee than MP_NOINLINE for -flto.
asm("");
volatile int stack_dummy;
MP_STATE_THREAD(stack_top) = (char*)&stack_dummy;
}
@ -41,6 +43,8 @@ void mp_stack_set_top(void *top) {
mp_uint_t mp_stack_usage(void) {
// Assumes descending stack
// Force routine to not be inlined. Better guarantee than MP_NOINLINE for -flto.
asm("");
volatile int stack_dummy;
return MP_STATE_THREAD(stack_top) - (char*)&stack_dummy;
}