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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-wasm
load("test/mjsunit/wasm/wasm-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");
// The stack trace contains file path, only keep "stack.js".
function stripPath(s) {
return s.replace(/[^ (]*stack\.js/g, "stack.js");
}
function verifyStack(frames, expected) {
assertEquals(expected.length, frames.length, "number of frames mismatch");
expected.forEach(function(exp, i) {
assertEquals(exp[1], frames[i].getFunctionName(),
"["+i+"].getFunctionName()");
assertEquals(exp[2], frames[i].getLineNumber(), "["+i+"].getLineNumber()");
if (exp[0])
assertEquals(exp[3], frames[i].getPosition(),
"["+i+"].getPosition()");
assertContains(exp[4], frames[i].getFileName(), "["+i+"].getFileName()");
var toString;
if (exp[0]) {
toString = "wasm-function[" + exp[2] + "]:" + exp[3];
if (exp[1] !== null) toString = exp[1] + " (" + toString + ")";
} else {
toString = exp[4] + ":" + exp[2] + ":";
}
assertContains(toString, frames[i].toString(), "["+i+"].toString()");
});
}
var stack;
function STACK() {
var e = new Error();
stack = e.stack;
}
var builder = new WasmModuleBuilder();
builder.addMemory(0, 1, false);
builder.addImport("mod", "func", kSig_v_v);
builder.addFunction("main", kSig_v_v)
.addBody([kExprCallFunction, 0])
.exportAs("main");
builder.addFunction("exec_unreachable", kSig_v_v)
.addBody([kExprUnreachable])
.exportAs("exec_unreachable");
// Make this function unnamed, just to test also this case.
var mem_oob_func = builder.addFunction(undefined, kSig_i_v)
// Access the memory at offset -1, to provoke a trap.
.addBody([kExprI32Const, 0x7f, kExprI32LoadMem8S, 0, 0])
.exportAs("mem_out_of_bounds");
// Call the mem_out_of_bounds function, in order to have two wasm stack frames.
builder.addFunction("call_mem_out_of_bounds", kSig_i_v)
.addBody([kExprCallFunction, mem_oob_func.index])
.exportAs("call_mem_out_of_bounds");
var module = builder.instantiate({mod: {func: STACK}});
(function testSimpleStack() {
var expected_string = 'Error\n' +
// The line numbers below will change as this test gains / loses lines..
' at STACK (stack.js:39:11)\n' + // --
' at main (wasm-function[1]:1)\n' + // --
' at testSimpleStack (stack.js:78:18)\n' + // --
' at stack.js:80:3'; // --
module.exports.main();
assertEquals(expected_string, stripPath(stack));
})();
// For the remaining tests, collect the Callsite objects instead of just a
// string:
Error.prepareStackTrace = function(error, frames) {
return frames;
};
(function testStackFrames() {
module.exports.main();
verifyStack(stack, [
// isWasm function line pos file
[ false, "STACK", 39, 0, "stack.js"],
[ true, "main", 1, 1, null],
[ false, "testStackFrames", 89, 0, "stack.js"],
[ false, null, 98, 0, "stack.js"]
]);
})();
(function testWasmUnreachable() {
try {
module.exports.exec_unreachable();
fail("expected wasm exception");
} catch (e) {
assertContains("unreachable", e.message);
verifyStack(e.stack, [
// isWasm function line pos file
[ true, "exec_unreachable", 2, 1, null],
[ false, "testWasmUnreachable", 102, 0, "stack.js"],
[ false, null, 113, 0, "stack.js"]
]);
}
})();
(function testWasmMemOutOfBounds() {
try {
module.exports.call_mem_out_of_bounds();
fail("expected wasm exception");
} catch (e) {
assertContains("out of bounds", e.message);
verifyStack(e.stack, [
// isWasm function line pos file
[ true, null, 3, 3, null],
[ true, "call_mem_out_of_bounds", 4, 1, null],
[ false, "testWasmMemOutOfBounds", 117, 0, "stack.js"],
[ false, null, 129, 0, "stack.js"]
]);
}
})();
(function testStackOverflow() {
print("testStackOverflow");
var builder = new WasmModuleBuilder();
var sig_index = builder.addType(kSig_v_v);
builder.addFunction("recursion", sig_index)
.addBody([
kExprI32Const, 0,
kExprCallIndirect, sig_index, kTableZero
])
.exportFunc();
builder.appendToTable([0]);
try {
builder.instantiate().exports.recursion();
fail("expected wasm exception");
} catch (e) {
assertEquals("Maximum call stack size exceeded", e.message, "trap reason");
assertTrue(e.stack.length >= 4, "expected at least 4 stack entries");
verifyStack(e.stack.splice(0, 4), [
// isWasm function line pos file
[ true, "recursion", 0, 0, null],
[ true, "recursion", 0, 3, null],
[ true, "recursion", 0, 3, null],
[ true, "recursion", 0, 3, null]
]);
}
})();
(function testBigOffset() {
print('testBigOffset');
var builder = new WasmModuleBuilder();
let body = [kExprI32Const, 0, kExprI32Add];
while (body.length <= 65536) body = body.concat(body);
body.unshift(kExprI32Const, 0);
body.push(kExprUnreachable);
let unreachable_pos = body.length - 1;
builder.addFunction('main', kSig_v_v).addBody(body).exportFunc();
try {
builder.instantiate().exports.main();
fail('expected wasm exception');
} catch (e) {
assertEquals('unreachable', e.message, 'trap reason');
verifyStack(e.stack, [
// isWasm, function, line, pos, file
[true, 'main', 0, unreachable_pos + 1, null], // -
[false, 'testBigOffset', 173, 0, 'stack.js'], //-
[false, null, 184, 0, 'stack.js']
]);
}
})();
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