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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 /js/src/jit-test/tests/heap-analysis/byteSize-of-symbol.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 'js/src/jit-test/tests/heap-analysis/byteSize-of-symbol.js')
-rw-r--r-- | js/src/jit-test/tests/heap-analysis/byteSize-of-symbol.js | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/heap-analysis/byteSize-of-symbol.js b/js/src/jit-test/tests/heap-analysis/byteSize-of-symbol.js new file mode 100644 index 0000000000..3262b20993 --- /dev/null +++ b/js/src/jit-test/tests/heap-analysis/byteSize-of-symbol.js @@ -0,0 +1,23 @@ +// |jit-test| skip-if: !getBuildConfiguration("moz-memory") +// Run this test only if we're using jemalloc. Other malloc implementations +// exhibit surprising behaviors. For example, 32-bit Fedora builds have +// non-deterministic allocation sizes. + +// Check JS::ubi::Node::size results for symbols. + +// We actually hard-code specific sizes into this test, even though they're +// implementation details, because in practice there are only two architecture +// variants to consider (32-bit and 64-bit), and if these sizes change, that's +// something SpiderMonkey hackers really want to know; they're supposed to be +// stable. + +const SIZE_OF_SYMBOL = getBuildConfiguration("pointer-byte-size") == 4 ? 16 : 16; + +// Without a description. +assertEq(byteSize(Symbol()), SIZE_OF_SYMBOL); + +// With a description. +assertEq(byteSize(Symbol("This is a relatively long description to be passed to " + + "Symbol() but it doesn't matter because it just gets " + + "interned as a JSAtom* anyways.")), + SIZE_OF_SYMBOL); |