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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /devtools/client/shared/vendor/source-map/lib/wasm.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'devtools/client/shared/vendor/source-map/lib/wasm.js')
-rw-r--r-- | devtools/client/shared/vendor/source-map/lib/wasm.js | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/devtools/client/shared/vendor/source-map/lib/wasm.js b/devtools/client/shared/vendor/source-map/lib/wasm.js new file mode 100644 index 0000000000..3091d9ee26 --- /dev/null +++ b/devtools/client/shared/vendor/source-map/lib/wasm.js @@ -0,0 +1,138 @@ +const readWasm = require("../lib/read-wasm"); + +/** + * Provide the JIT with a nice shape / hidden class. + */ +function Mapping() { + this.generatedLine = 0; + this.generatedColumn = 0; + this.lastGeneratedColumn = null; + this.source = null; + this.originalLine = null; + this.originalColumn = null; + this.name = null; +} + +let cachedWasm = null; + +module.exports = function wasm() { + if (cachedWasm) { + return cachedWasm; + } + + const callbackStack = []; + + cachedWasm = readWasm() + .then(buffer => { + return WebAssembly.instantiate(buffer, { + env: { + mapping_callback( + generatedLine, + generatedColumn, + + hasLastGeneratedColumn, + lastGeneratedColumn, + + hasOriginal, + source, + originalLine, + originalColumn, + + hasName, + name + ) { + const mapping = new Mapping(); + // JS uses 1-based line numbers, wasm uses 0-based. + mapping.generatedLine = generatedLine + 1; + mapping.generatedColumn = generatedColumn; + + if (hasLastGeneratedColumn) { + // JS uses inclusive last generated column, wasm uses exclusive. + mapping.lastGeneratedColumn = lastGeneratedColumn - 1; + } + + if (hasOriginal) { + mapping.source = source; + // JS uses 1-based line numbers, wasm uses 0-based. + mapping.originalLine = originalLine + 1; + mapping.originalColumn = originalColumn; + + if (hasName) { + mapping.name = name; + } + } + + callbackStack[callbackStack.length - 1](mapping); + }, + + start_all_generated_locations_for() { + console.time("all_generated_locations_for"); + }, + end_all_generated_locations_for() { + console.timeEnd("all_generated_locations_for"); + }, + + start_compute_column_spans() { + console.time("compute_column_spans"); + }, + end_compute_column_spans() { + console.timeEnd("compute_column_spans"); + }, + + start_generated_location_for() { + console.time("generated_location_for"); + }, + end_generated_location_for() { + console.timeEnd("generated_location_for"); + }, + + start_original_location_for() { + console.time("original_location_for"); + }, + end_original_location_for() { + console.timeEnd("original_location_for"); + }, + + start_parse_mappings() { + console.time("parse_mappings"); + }, + end_parse_mappings() { + console.timeEnd("parse_mappings"); + }, + + start_sort_by_generated_location() { + console.time("sort_by_generated_location"); + }, + end_sort_by_generated_location() { + console.timeEnd("sort_by_generated_location"); + }, + + start_sort_by_original_location() { + console.time("sort_by_original_location"); + }, + end_sort_by_original_location() { + console.timeEnd("sort_by_original_location"); + }, + }, + }); + }) + .then(Wasm => { + return { + exports: Wasm.instance.exports, + withMappingCallback: (mappingCallback, f) => { + callbackStack.push(mappingCallback); + try { + f(); + } finally { + callbackStack.pop(); + } + }, + }; + }) + .then(null, e => { + cachedWasm = null; + throw e; + }); + + return cachedWasm; +}; |