549692cbc0
In this CL I implement streaming compilation for WebAssembly, as described in the design doc I have sent out already. In this implementation the decoding of sections other than the code section is done immediately on the foreground thread. Eventually all decoding should happen in the background. I think it is acceptable to do the decoding on the foreground thread for now because I have finished it already, and decoding in the background would add even more complexity to this CL. Bug:v8:6785 Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng Change-Id: I285e1e5e1a5a243113c92571b25ee9bae551d0ed Reviewed-on: https://chromium-review.googlesource.com/631721 Reviewed-by: Mircea Trofin <mtrofin@chromium.org> Reviewed-by: Clemens Hammacher <clemensh@chromium.org> Reviewed-by: Andreas Haas <ahaas@chromium.org> Commit-Queue: Andreas Haas <ahaas@chromium.org> Cr-Commit-Position: refs/heads/master@{#48022}
94 lines
2.8 KiB
JavaScript
94 lines
2.8 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --expose-wasm
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load("test/mjsunit/wasm/wasm-constants.js");
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load("test/mjsunit/wasm/wasm-module-builder.js");
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// Collect the Callsite objects instead of just a string:
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Error.prepareStackTrace = function(error, frames) {
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return frames;
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};
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function testTrapLocations(instance, expected_stack_length) {
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function testWasmTrap(value, reason, position) {
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let function_name = arguments.callee.name;
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try {
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instance.exports.main(value);
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fail('expected wasm exception');
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} catch (e) {
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assertEquals(kTrapMsgs[reason], e.message, 'trap reason');
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// Check that the trapping function is the one which was called from this
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// function.
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assertTrue(
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e.stack[1].toString().startsWith(function_name), 'stack depth');
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assertEquals(0, e.stack[0].getLineNumber(), 'wasmFunctionIndex');
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assertEquals(position, e.stack[0].getPosition(), 'position');
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}
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}
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// The actual tests:
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testWasmTrap(0, kTrapDivByZero, 14);
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testWasmTrap(1, kTrapMemOutOfBounds, 15);
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testWasmTrap(2, kTrapUnreachable, 28);
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testWasmTrap(3, kTrapFuncInvalid, 32);
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}
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var builder = new WasmModuleBuilder();
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builder.addMemory(0, 1, false);
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var sig_index = builder.addType(kSig_i_v)
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// Build a function to resemble this code:
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// if (idx < 2) {
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// return load(-2 / idx);
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// } else if (idx == 2) {
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// unreachable;
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// } else {
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// return call_indirect(idx);
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// }
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// There are four different traps which are triggered by different input values:
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// (0) division by zero; (1) mem oob; (2) unreachable; (3) invalid call target
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// Each of them also has a different location where it traps.
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builder.addFunction("main", kSig_i_i)
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.addBody([
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// offset 1
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kExprBlock, kWasmI32,
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kExprGetLocal, 0,
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kExprI32Const, 2,
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kExprI32LtU,
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kExprIf, kWasmStmt,
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// offset 9
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kExprI32Const, 0x7e /* -2 */,
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kExprGetLocal, 0,
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kExprI32DivU,
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// offset 15
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kExprI32LoadMem, 0, 0,
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kExprBr, 1,
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kExprEnd,
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// offset 21
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kExprGetLocal, 0,
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kExprI32Const, 2,
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kExprI32Eq,
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kExprIf, kWasmStmt,
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kExprUnreachable,
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kExprEnd,
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// offset 30
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kExprGetLocal, 0,
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kExprCallIndirect, sig_index, kTableZero,
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kExprEnd,
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])
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.exportAs("main");
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builder.appendToTable([0]);
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let buffer = builder.toBuffer();
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// Test async compilation and instantiation.
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assertPromiseResult(WebAssembly.instantiate(buffer), pair => {
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testTrapLocations(pair.instance, 6);
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});
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// Test sync compilation and instantiation.
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testTrapLocations(builder.instantiate(), 4);
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