Function patchFrames

packages/wasm/src/index.ts:86–138

(
  frames: Array<StackFrame>,
  applicationKey?: string,
  existingImagesOffset: number = 0,
)

 */
// Only exported for tests
export function patchFrames(
  frames: Array<StackFrame>,
  applicationKey?: string,
  existingImagesOffset: number = 0,
): boolean {
  let hasAtLeastOneWasmFrameWithImage = false;
  frames.forEach(frame => {
    if (!frame.filename) {
      return;
    }

    const split = frame.filename.split('(');
    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
    const lastSplit = split[split.length - 1]!;

    // Let's call this first match a "messy match".
    // The browser stacktrace parser spits out frames that have a filename like this: "int) const (http://localhost:8001/main.wasm:wasm-function[190]:0x5aeb"
    // It contains some leftover mess because wasm stack frames are more complicated than our parser can handle: "at MyClass::bar(int) const (http://localhost:8001/main.wasm:wasm-function[190]:0x5aeb)"
    // This first match simply tries to mitigate the mess up until the first opening parens.
    // The match afterwards is a sensible fallback
    let match = lastSplit.match(PARSER_REGEX) as null | [string, string, string];

    if (!match) {
      match = frame.filename.match(PARSER_REGEX) as null | [string, string, string];
    }

    if (match) {
      const index = getImage(match[1]);
      const workerImageIndex = getWorkerImage(match[1]);
      frame.instruction_addr = match[2];
      frame.filename = match[1];
      frame.platform = 'native';

      if (applicationKey) {
        frame.module_metadata = {
          ...frame.module_metadata,
          [`${BUNDLER_PLUGIN_APP_KEY_PREFIX}${applicationKey}`]: true,
        };
      }

      if (index >= 0) {
        frame.addr_mode = `rel:${existingImagesOffset + index}`;
        hasAtLeastOneWasmFrameWithImage = true;
      } else if (workerImageIndex >= 0) {
        const mainThreadImagesCount = getImages().length;
        frame.addr_mode = `rel:${existingImagesOffset + mainThreadImagesCount + workerImageIndex}`;
        hasAtLeastOneWasmFrameWithImage = true;
      }
    }
  });

  return hasAtLeastOneWasmFrameWithImage;
}

/**
 * Looks up an image by URL in worker images.