[Webkit-unassigned] [Bug 170440] New: Slightly change the JSC exception handling calling convention to remove the terrible hack that wasm uses to stick a Cell into the call frame
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Apr 3 21:46:34 PDT 2017
https://bugs.webkit.org/show_bug.cgi?id=170440
Bug ID: 170440
Summary: Slightly change the JSC exception handling calling
convention to remove the terrible hack that wasm uses
to stick a Cell into the call frame
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: sbarati at apple.com
CC: benjamin at webkit.org, fpizlo at apple.com,
ggaren at apple.com, gskachkov at gmail.com,
jfbastien at apple.com, keith_miller at apple.com,
mark.lam at apple.com, msaboff at apple.com,
ticaiolima at gmail.com, utatane.tea at gmail.com
Wasm will put a JSCell into the callee just so the code that catches an exception can get the VM from the callee. However, this is a hack. Instead, we could just make the thing that jumps to exception handling code location load vm.callFrameForCatch into the call frame register before jumping to the exception handling code.
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