Method generateSourceView

deps/v8/tools/profview/profview.js:1590–1621

(functionId)

  }

  generateSourceView(functionId) {
    console.assert(this.hasSource(functionId));
    let data = this.functions.get(functionId);
    let scriptId = data.scriptId;
    let script = this.getScript(scriptId);
    let firstLineNumber =
        this.getLineForScriptOffset(script, data.startScriptOffset);
    let lastLineNumber =
        this.getLineForScriptOffset(script, data.endScriptOffset);
    let lines = script.slice(firstLineNumber, lastLineNumber + 1);
    normalizeLeadingWhitespace(lines);

    let samplesTotal = 0;
    let lineSampleCounts = [];
    for (let [codeId, block] of data.codes) {
      block.offsets.forEach((sampleCount, codeOffset) => {
        let sourceOffset = block.positionTable.getScriptOffset(codeOffset);
        let lineNumber =
            this.getLineForScriptOffset(script, sourceOffset) - firstLineNumber;
        samplesTotal += sampleCount;
        lineSampleCounts[lineNumber] =
            (lineSampleCounts[lineNumber] || 0) + sampleCount;
      });
    }

    return {
      source: lines,
      lineSampleCounts: lineSampleCounts,
      samplesTotal: samplesTotal,
      firstLineNumber: firstLineNumber + 1  // Source code is 1-indexed.
    };
  }
}

class FunctionSourceData {