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simplified uncatchable exception handling

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Fabrice Bellard
2025-04-29 18:48:58 +02:00
parent 23e2dc9c39
commit 53327c2580
3 changed files with 10 additions and 29 deletions
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34
quickjs.c
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@@ -263,6 +263,8 @@ struct JSRuntime {
uintptr_t stack_limit; /* lower stack limit */
JSValue current_exception;
/* true if the current exception cannot be catched */
BOOL current_exception_is_uncatchable : 8;
/* true if inside an out of memory error, to avoid recursing */
BOOL in_out_of_memory : 8;
@@ -912,7 +914,6 @@ struct JSObject {
uint8_t is_exotic : 1; /* TRUE if object has exotic property handlers */
uint8_t fast_array : 1; /* TRUE if u.array is used for get/put (for JS_CLASS_ARRAY, JS_CLASS_ARGUMENTS and typed arrays) */
uint8_t is_constructor : 1; /* TRUE if object is a constructor function */
uint8_t is_uncatchable_error : 1; /* if TRUE, error is not catchable */
uint8_t tmp_mark : 1; /* used in JS_WriteObjectRec() */
uint8_t is_HTMLDDA : 1; /* specific annex B IsHtmlDDA behavior */
uint16_t class_id; /* see JS_CLASS_x */
@@ -5052,7 +5053,6 @@ static JSValue JS_NewObjectFromShape(JSContext *ctx, JSShape *sh, JSClassID clas
p->is_exotic = 0;
p->fast_array = 0;
p->is_constructor = 0;
p->is_uncatchable_error = 0;
p->tmp_mark = 0;
p->is_HTMLDDA = 0;
p->weakref_count = 0;
@@ -6699,6 +6699,7 @@ JSValue JS_Throw(JSContext *ctx, JSValue obj)
JSRuntime *rt = ctx->rt;
JS_FreeValue(ctx, rt->current_exception);
rt->current_exception = obj;
rt->current_exception_is_uncatchable = FALSE;
return JS_EXCEPTION;
}
@@ -7166,7 +7167,7 @@ static JSValue JS_ThrowTypeErrorInvalidClass(JSContext *ctx, int class_id)
static void JS_ThrowInterrupted(JSContext *ctx)
{
JS_ThrowInternalError(ctx, "interrupted");
JS_SetUncatchableError(ctx, ctx->rt->current_exception, TRUE);
JS_SetUncatchableException(ctx, TRUE);
}
static no_inline __exception int __js_poll_interrupts(JSContext *ctx)
@@ -10221,29 +10222,10 @@ BOOL JS_IsError(JSContext *ctx, JSValueConst val)
return (p->class_id == JS_CLASS_ERROR);
}
/* used to avoid catching interrupt exceptions */
BOOL JS_IsUncatchableError(JSContext *ctx, JSValueConst val)
/* must be called after JS_Throw() */
void JS_SetUncatchableException(JSContext *ctx, BOOL flag)
{
JSObject *p;
if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
return FALSE;
p = JS_VALUE_GET_OBJ(val);
return p->class_id == JS_CLASS_ERROR && p->is_uncatchable_error;
}
void JS_SetUncatchableError(JSContext *ctx, JSValueConst val, BOOL flag)
{
JSObject *p;
if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
return;
p = JS_VALUE_GET_OBJ(val);
if (p->class_id == JS_CLASS_ERROR)
p->is_uncatchable_error = flag;
}
void JS_ResetUncatchableError(JSContext *ctx)
{
JS_SetUncatchableError(ctx, ctx->rt->current_exception, FALSE);
ctx->rt->current_exception_is_uncatchable = flag;
}
void JS_SetOpaque(JSValue obj, void *opaque)
@@ -18762,7 +18744,7 @@ static JSValue JS_CallInternal(JSContext *caller_ctx, JSValueConst func_obj,
sf->cur_pc = pc;
build_backtrace(ctx, rt->current_exception, NULL, 0, 0, 0);
}
if (!JS_IsUncatchableError(ctx, rt->current_exception)) {
if (!rt->current_exception_is_uncatchable) {
while (sp > stack_buf) {
JSValue val = *--sp;
JS_FreeValue(ctx, val);