wasm: Increase default stack size to 1MB #50083
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This commit increases the dfeault stack size allocated to the wasm32-unknown-unknown target to 1MB by default. Currently the default stack size is one wasm page, or 64 kilobytes. This default stack is quite small and has caused a stack overflow or two in the wild by accident. The current "best practice" for fixing this is to pass `-Clink-args='-z stack-size=$bigger'` but that's not great nor always easy to do. A default of 1MB matches more closely with other platforms where it's "pretty big" by default. Note that it was tested and if the users uses `-C link-args` to pass a custom stack size that's still resepected as lld seems to take the first argument, and where rustc is passing it will always be last.
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This was referenced Jun 3, 2020
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This commit increases the dfeault stack size allocated to the
wasm32-unknown-unknown target to 1MB by default. Currently the default stack
size is one wasm page, or 64 kilobytes. This default stack is quite small and
has caused a stack overflow or two in the wild by accident.
The current "best practice" for fixing this is to pass
-Clink-args='-z stack-size=$bigger'but that's not great nor always easy to do. A default of1MB matches more closely with other platforms where it's "pretty big" by
default.
Note that it was tested and if the users uses
-C link-argsto pass a customstack size that's still resepected as lld seems to take the first argument, and
where rustc is passing it will always be last.