• Milad Farazmand's avatar
    PPC/s390: [wasm] Fix registers spilled in DebugBreak frame · e54259ee
    Milad Farazmand authored
    Port e47f9a9d
    
    Original Commit Message:
    
        The set of registers to spill was wrong. Instead of spilling wasm
        parameter registers (like the WasmCompileLazy builtin), we should spill
        all registers that are being used as Liftoff cache registers.
        This CL defines platform-specific WasmDebugBreakFrameConstants which
        hold the set of registers to spill. This set is used in the builtin, and
        will later be used for inspecting the spilled registers.
    
        In order to iterate bit sets more easily in both direction (MSB to LSB
        or LSB to MSB), we add a base::bits::IterateBits{,Backwards} method
        which provides the respective iterators.
    
    R=clemensb@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=
    LOG=N
    
    Change-Id: Ic308a7712f080e43a0c45f496b087ce8450f657a
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2105563Reviewed-by: 's avatarJunliang Yan <jyan@ca.ibm.com>
    Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#66736}
    e54259ee
builtins-s390.cc 123 KB