• clemensh's avatar
    [asm.js] [wasm] Store function start position for stack check · fc327e23
    clemensh authored
    We did not associate any position to the stack check in the wasm
    function prologue, hence a check failed later when trying to map the
    non-existent position to the asm.js source position.
    
    With this CL, we add a mapping to the source position table, mapping
    the stack check call to byte offset 0 (which is distinct from any valid
    instruction position). Also, we add another entry to the asm.js source
    position sidetable, mapping byte offset 0 to the start source position
    of the function body.
    
    R=titzer@chromium.org, ahaas@chromium.org
    BUG=chromium:677685
    
    Review-Url: https://codereview.chromium.org/2609363004
    Cr-Commit-Position: refs/heads/master@{#42130}
    fc327e23
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