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jscript: Don't assume that ret value is cleared when it's not set explicitly. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2016-03-28 17:48:57 +02:00 committed by Alexandre Julliard
parent f198b5a45a
commit d08036120a
2 changed files with 19 additions and 7 deletions
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7
dlls/jscript/compile.c
View File

@ -1479,7 +1479,7 @@ static HRESULT compile_return_statement(compiler_ctx_t *ctx, expression_statemen
if(FAILED(hres))
return hres;
return push_instr(ctx, OP_ret) ? S_OK : E_OUTOFMEMORY;
return push_instr_uint(ctx, OP_ret, !stat->expr);
}
/* ECMA-262 3rd Edition 12.10 */
@ -1857,8 +1857,9 @@ static HRESULT compile_function(compiler_ctx_t *ctx, source_elements_t *source,
resolve_labels(ctx, off);
if(!push_instr(ctx, OP_ret))
return E_OUTOFMEMORY;
hres = push_instr_uint(ctx, OP_ret, !from_eval);
if(FAILED(hres))
return hres;
if(TRACE_ON(jscript_disas))
dump_code(ctx, off);

19
dlls/jscript/engine.c
View File

@ -194,6 +194,13 @@ static inline IDispatch *stack_topn_objid(script_ctx_t *ctx, unsigned n, DISPID
return get_object(stack_topn(ctx, n+1));
}
static inline jsval_t steal_ret(call_frame_t *frame)
{
jsval_t r = frame->ret;
frame->ret = jsval_undefined();
return r;
}
static void exprval_release(exprval_t *val)
{
switch(val->type) {
@ -2323,8 +2330,14 @@ static HRESULT interp_pop(script_ctx_t *ctx)
static HRESULT interp_ret(script_ctx_t *ctx)
{
const unsigned clear_ret = get_op_uint(ctx, 0);
call_frame_t *frame = ctx->call_ctx;
TRACE("\n");
if(clear_ret)
jsval_release(steal_ret(frame));
jmp_abs(ctx, -1);
return S_OK;
}
@ -2457,10 +2470,8 @@ static HRESULT enter_bytecode(script_ctx_t *ctx, function_code_t *func, jsval_t
assert(frame->scope == frame->base_scope);
ctx->call_ctx = frame->prev_frame;
if(SUCCEEDED(hres)) {
*ret = frame->ret;
frame->ret = jsval_undefined();
}
if(SUCCEEDED(hres))
*ret = steal_ret(frame);
release_call_frame(frame);
return hres;