• Benedikt Meurer's avatar
    [async] Add Promise.all() support to --async-stack-traces. · 6f39ab89
    Benedikt Meurer authored
    This adds support for Promise.all() to --async-stack-traces (also at
    zero cost, since we can derive the relevant information from the resolve
    element closure and context). In case of `Promise.all(a)` the stack
    trace even tells you which element of `a` is responsible, for example
    
    ```js
    async function fine() {}
    async function thrower() { await fine(); throw new Error(); }
    async function test() { await Promise.all([fine(), thrower()]); }
    ```
    
    will generate the following stack trace
    
    ```
    Error
        at thrower (something.js:1:9)
        at async Promise.all (index 1)
        at async test (something.js:3:3)
    ```
    
    so it not only shows the async Promise.all() frames, but even tells the
    user exactly that the second element of `[fine(), thrower()]` is the
    relevant one.
    
    Bug: v8:7522
    Change-Id: I279a845888e06053cf0e3c9338ab71caabaabf45
    Reviewed-on: https://chromium-review.googlesource.com/c/1299248Reviewed-by: 's avatarYang Guo <yangguo@chromium.org>
    Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#57023}
    6f39ab89
messages.cc 45.6 KB