• Junliang Yan's avatar
    PPC/s390: [wasm] Make stack check independent of the Isolate. · 94aac004
    Junliang Yan authored
    Port c96ac82c
    
    Original Commit Message:
    
        This makes stack checks in WasmCode independent of the underlying
        Isolate by loading the limit address from the WasmInstanceObject instead
        of embedding it into the instruction stream. It hence removes the last
        use of the Isolate field from WasmGraphBuilder.
    
        Additionally this introduces the notion of a "runtime stub" which
        represents stub code global to the NativeModule that can be directly
        called from each WasmCode in the same module. These stubs can act as
        trampolines via which Isolate-independent WasmCode can enter other V8
        builtins or runtime functions that remain Isolate-dependent. They will
        eventually replace the current "trampoline" in a NativeModule.
    
    R=mstarzinger@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=v8:7424
    LOG=N
    
    Change-Id: I5745a20133c930aecb80119e71ac1d8717e267bf
    Reviewed-on: https://chromium-review.googlesource.com/1085276Reviewed-by: 's avatarJoran Siu <joransiu@ca.ibm.com>
    Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
    Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#53503}
    94aac004
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