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emscripten-core / emscripten Public

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Add `CROSS_ORIGIN_STORAGE` link flag#27066

Merged

sbc100 merged 88 commits into

emscripten-core:mainemscripten-core/emscripten:mainfrom

tomayac:cross-origin-storagetomayac/emscripten:cross-origin-storageCopy head branch name to clipboard

Jun 18, 2026

Conversation Commits88 (88)Checks Files changed

Merged

Add `CROSS_ORIGIN_STORAGE` link flag#27066
sbc100 merged 88 commits into
emscripten-core:mainfrom
tomayac:cross-origin-storage

Commits

Commits on Jun 18, 2026

feat: add CROSS_ORIGIN_STORAGE support for Wasm loading
tomayac
committed
fix: correct COS implementation to match WICG explainer API
tomayac
committed
test: add test suite for CROSS_ORIGIN_STORAGE feature
tomayac
committed
docs: add Cross-Origin Storage guide and polish setting comment
tomayac
committed
test: add cross_origin_storage browser example
tomayac
committed
feat: add COS instrumentation callbacks and update example/docs/tests
tomayac
committed
fix: add link-time validation and changelog entry for CROSS_ORIGIN_STORAGE
tomayac
committed
fix: remove incorrect 'base64' claim in SINGLE_FILE + COS descriptions
tomayac
committed
feat: warn when CROSS_ORIGIN_STORAGE is used with SPLIT_MODULE or MAIN_MODULE
tomayac
committed
fix: warn when CROSS_ORIGIN_STORAGE is used with SIDE_MODULE
tomayac
committed
docs: clarify that COS only makes sense for widely-shared public Wasm binaries
tomayac
committed
feat: add CROSS_ORIGIN_STORAGE_ORIGINS setting
tomayac
committed
fix: make '*' the implicit default for CROSS_ORIGIN_STORAGE_ORIGINS
tomayac
committed
fix: final polish — warnings, stale comments, doc consistency
tomayac
committed
test: add missing SIDE_MODULE warning test for CROSS_ORIGIN_STORAGE
tomayac
committed
fix: correct COS test failures and add demo Makefile
tomayac
committed
docs: replace concrete project examples with generic descriptions
tomayac
committed
docs: add Chrome Web Store link for COS extension in See also
tomayac
committed
docs: replace CDN framing with 'popular' in COS guide
tomayac
committed
docs: note multi-origin exception and origins flag in COS when-to-use
tomayac
committed
feat: pass hash as first arg to onCOSCacheMiss(hash, url)
tomayac
committed
docs: remove CDN mention and add visibility/security note in preamble.js
tomayac
committed
docs: add timing-oracle security note to visibility upgrade callout in RST
tomayac
committed
docs: remove CDN mentions from CROSS_ORIGIN_STORAGE settings comments
tomayac
committed
style: normalize double spaces after periods in COS settings comments
tomayac
committed
style: use American spelling 'serialized' consistently
tomayac
committed
docs: describe progressive enhancement and fallback path in COS example README
tomayac
committed
fix: ruff docstring formatting and regenerate settings_reference.rst
tomayac
committed
docs: warn about post-emcc wasm post-processing invalidating the embedded hash
tomayac
committed
feat(cross-origin-storage): expose Module['wasmSHA256'] for custom instantiateWasm loaders
tomayac
committed
fix(cross-origin-storage): also patch Module['wasmSHA256'] in post-binaryen fixup; clarify Module reference in docs
tomayac
committed
docs: drop =1 from -sCROSS_ORIGIN_STORAGE flag references in COS guide
tomayac
committed
docs: use :ref: cross-references for settings in COS guide prose
tomayac
committed
docs: remove redundant link-time note from COS usage section
tomayac
committed
docs: use unquoted comma-separated syntax for CROSS_ORIGIN_STORAGE_ORIGINS example
tomayac
committed
docs: use comma-separated syntax for CROSS_ORIGIN_STORAGE_ORIGINS examples
tomayac
committed
fix: make CROSS_ORIGIN_STORAGE + WASM_ASYNC_COMPILATION=0 a hard error
tomayac
committed
docs: update build-time constant example to match current cosHash object form
tomayac
committed
docs: use Module['wasmSHA256'] consistently and fix sed to patch both hash occurrences
tomayac
committed
refactor: rename wasmSHA256 to wasmHash and expose {algorithm,value} object
tomayac
committed
refactor: address multiple PR review comments on CROSS_ORIGIN_STORAGE
tomayac
committed
refactor: make COS instrumentation callbacks opt-in via INCOMING_MODULE_JS_API
tomayac
committed
Add browser tests
tomayac
committed
fix: CI failures — ruff, build-docs, and browser-test experimental warning
tomayac
committed
remove: dead WASM_SHA256 internal setting
tomayac
committed
style: add -O2 to COS example build and browser tests
tomayac
committed
chore: untrack generated COS example build artifacts
tomayac
committed
test: log COS events to console in miss_then_hit browser test
tomayac
committed
style: move [experimental] tag to end of CROSS_ORIGIN_STORAGE comment
tomayac
committed
fix: remove redundant cosHash?.value guard in COS preamble
tomayac
committed
fix: make CROSS_ORIGIN_STORAGE a hard error for non-web environments
tomayac
committed
remove: Makefile from COS example directory
tomayac
committed
style: drop -o flag from COS error-only tests
tomayac
committed
style: prefer hello_world.c over hello_world.cpp in COS tests
tomayac
committed
style: drop docstrings and comments from COS tests
tomayac
committed
refactor: extract setup_cross_origin_storage() from phase_linker_setup
tomayac
committed
remove: COS example build artifact entries from .gitignore
tomayac
committed
refactor: consolidate 19 COS unit tests into 5
tomayac
committed
style: shorten COS ChangeLog entry to 3 lines
tomayac
committed
remove: test_cross_origin_storage_callbacks from test_other.py
tomayac
committed
fix: copyright year and remove redundant build comment from main.cpp
tomayac
committed
remove: test/cross_origin_storage/ example directory
tomayac
committed
Make feature detection rock-solid
tomayac
committed
Make feature detection compact
tomayac
committed
fix: use Markdown syntax in ChangeLog, not RST :ref:
tomayac
committed
refactor: move COS incompatibilities to INCOMPATIBLE_SETTINGS
tomayac
committed
style: clean up COS browser tests
tomayac
committed
style: add PR number to COS ChangeLog entry
tomayac
committed
refactor: clean up COS preamble and hash injection
tomayac
committed
test: simplify COS assertions — use tighter algorithm+value regex
tomayac
committed
test: use simplified CROSS_ORIGIN_STORAGE_ORIGINS syntax in test
tomayac
committed
test: drop redundant -sENVIRONMENT=web from COS error tests (web is default)
tomayac
committed
test: add TODO to remove COS extension once Chromium ships the feature natively
tomayac
committed
test: rebaseline codesize tests after upstream merge
tomayac
committed
refactor: use singular requestFileHandle() instead of requestFileHandles()
tomayac
committed
Apply suggestion from @tomayac
tomayac
committed
fix: remove error-name dependency in COS catch block
tomayac
committed
docs: use abstract language in COS comment instead of concrete error names
tomayac
committed
fix: resolve ruff lint errors introduced during rebase
tomayac
committed
Automatic rebaseline of codesize expectations. NFC
tomayac
committed
fix: address reviewer feedback on ChangeLog, settings.js, and preamble.js
tomayac
committed
docs: regenerate settings_reference.rst after comment reflow
tomayac
committed
fix: remove os.path.exists guard in COS hash computation
tomayac
committed
test: drop redundant -sENVIRONMENT=web from origins assert_fail tests
tomayac
committed
test: drop -sENVIRONMENT=web from COS tests and condense single-flag cmds
tomayac
committed
Automatic rebaseline of codesize expectations. NFC
tomayac
committed
Merge remote-tracking branch 'upstream/main' into cross-origin-storage
sbc100
committed
Rebaseline
sbc100
committed

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