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py: Fix reraise logic.

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This commit is contained in:
Damien George 2014-03-30 00:54:48 +00:00
parent 010043caaf
commit d7592a1c3f
1 changed files with 12 additions and 6 deletions
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18
py/vm.c
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@ -51,12 +51,11 @@ typedef enum {
exc_sp->opcode = op; \
exc_sp->handler = ip + unum; \
exc_sp->val_sp = MP_TAGPTR_MAKE(sp, currently_in_except_block); \
exc_sp->prev_exc = nlr.ret_val; \
exc_sp->prev_exc = MP_OBJ_NULL; \
currently_in_except_block = 0; /* in a try block now */
#define POP_EXC_BLOCK() \
currently_in_except_block = MP_TAGPTR_TAG(exc_sp->val_sp); /* restore previous state */ \
if (currently_in_except_block) { nlr.ret_val = exc_sp->prev_exc; } \
exc_sp--; /* pop back to previous exception handler */
mp_vm_return_kind_t mp_execute_byte_code(const byte *code, const mp_obj_t *args, uint n_args, const mp_obj_t *args2, uint n_args2, mp_obj_t *ret) {
@ -701,12 +700,17 @@ unwind_return:
unum = *ip++;
assert(unum <= 1);
if (unum == 0) {
if (!currently_in_except_block) {
// search for the inner-most previous exception, to reraise it
obj1 = MP_OBJ_NULL;
for (mp_exc_stack *e = exc_sp; e >= exc_stack; e--) {
if (e->prev_exc != MP_OBJ_NULL) {
obj1 = e->prev_exc;
break;
}
}
if (obj1 == MP_OBJ_NULL) {
nlr_jump(mp_obj_new_exception_msg(&mp_type_RuntimeError, "No active exception to reraise"));
}
// This assumes that nlr.ret_val holds last raised
// exception and is not overwritten since then.
obj1 = nlr.ret_val;
} else {
obj1 = POP();
}
@ -844,6 +848,8 @@ yield:
// catch exception and pass to byte code
sp = MP_TAGPTR_PTR(exc_sp->val_sp);
ip = exc_sp->handler;
// save this exception in the stack so it can be used in a reraise, if needed
exc_sp->prev_exc = nlr.ret_val;
// push(traceback, exc-val, exc-type)
PUSH(mp_const_none);
PUSH(nlr.ret_val);