1a73f73b3b
The format of the name section changed recently. It now contains subsections of different type (currently for function names or local variable names). This CL changes our internal wasm module builders (in JS and C++) to emit this new format, and changes the decoder to understand it. We currently only parse the function name section, and ignore names of local variables. I will later extend this to parse local variable names when needed for debugging. R=ahaas@chromium.org, rossberg@chromium.org BUG=v8:6222 Change-Id: I2627160c25c9209a3f09abe0b88941ec48b24434 Reviewed-on: https://chromium-review.googlesource.com/470247 Commit-Queue: Clemens Hammacher <clemensh@chromium.org> Reviewed-by: Andreas Rossberg <rossberg@chromium.org> Cr-Commit-Position: refs/heads/master@{#44492}
70 lines
2.2 KiB
JavaScript
70 lines
2.2 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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var builder = new WasmModuleBuilder();
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var last_func_index = builder.addFunction("exec_unreachable", kSig_v_v)
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.addBody([kExprUnreachable]).index
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var illegal_func_name = [0xff];
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var func_names = [ "☠", illegal_func_name, "some math: (½)² = ¼", "" ];
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var expected_names = ["exec_unreachable", "☠", null,
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"some math: (½)² = ¼", "", "main"];
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for (var func_name of func_names) {
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last_func_index = builder.addFunction(func_name, kSig_v_v)
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.addBody([kExprCallFunction, last_func_index]).index;
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}
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builder.addFunction("main", kSig_v_v)
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.addBody([kExprCallFunction, last_func_index])
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.exportFunc();
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var module = builder.instantiate();
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(function testFunctionNamesAsString() {
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var names = expected_names.concat(["testFunctionNamesAsString", null]);
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try {
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module.exports.main();
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assertFalse("should throw");
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} catch (e) {
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var lines = e.stack.split(/\r?\n/);
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lines.shift();
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assertEquals(names.length, lines.length);
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for (var i = 0; i < names.length; ++i) {
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var line = lines[i].trim();
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if (names[i] === null) continue;
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var printed_name = names[i] === undefined ? "<WASM UNNAMED>" : names[i]
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var expected_start = "at " + printed_name + " (";
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assertTrue(line.startsWith(expected_start),
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"should start with '" + expected_start + "': '" + line + "'");
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}
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}
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})();
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// For the remaining tests, collect the Callsite objects instead of just a
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// 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 testFunctionNamesAsCallSites() {
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var names = expected_names.concat(['testFunctionNamesAsCallSites', null]);
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try {
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module.exports.main();
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assertFalse('should throw');
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} catch (e) {
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assertEquals(names.length, e.stack.length, 'stack length');
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for (var i = 0; i < names.length; ++i) {
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assertEquals(
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names[i], e.stack[i].getFunctionName(), 'function name at ' + i);
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}
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}
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})();
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