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Fix invalid assertion in vm_loop. (#1561)

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Because of the fallthrough case the value of 3 is also allowed in the default case.

Fixes #1555.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg 2017-02-06 10:19:31 +01:00 committed by GitHub
parent 589f2dec92
commit caf9308288
2 changed files with 23 additions and 1 deletions
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3
jerry-core/vm/vm.c
View File

@ -808,7 +808,8 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
}
default:
{
JERRY_ASSERT (CBC_BRANCH_OFFSET_LENGTH (opcode) == 2);
JERRY_ASSERT (CBC_BRANCH_OFFSET_LENGTH (opcode) == 2
|| CBC_BRANCH_OFFSET_LENGTH (opcode) == 3);
branch_offset <<= 8;
branch_offset |= *(byte_code_p++);

21
tests/jerry/regression-test-issue-1555.js Normal file
View File

@ -0,0 +1,21 @@
// Copyright JS Foundation and other contributors, http://js.foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
var src = "var a = 0; while(a) { switch(a) {";
/* The += operation has a longer opcode. */
for (var i = 0; i < 4000; i++)
src += "case " + i + ": a += a += a; break; ";
src += "} }";
eval(src);