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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
import {
getFrames,
getBlackBoxRanges,
getSelectedFrame,
} from "../../selectors/index";
import { isFrameBlackBoxed } from "../../utils/source";
import assert from "../../utils/assert";
import { getOriginalLocation } from "../../utils/source-maps";
import {
debuggerToSourceMapLocation,
sourceMapToDebuggerLocation,
} from "../../utils/location";
import { annotateFramesWithLibrary } from "../../utils/pause/frames/annotateFrames";
import { createWasmOriginalFrame } from "../../client/firefox/create";
import { getOriginalFunctionDisplayName } from "../sources/index";
function getSelectedFrameId(state, thread, frames) {
let selectedFrame = getSelectedFrame(state, thread);
const blackboxedRanges = getBlackBoxRanges(state);
if (selectedFrame && !isFrameBlackBoxed(selectedFrame, blackboxedRanges)) {
return selectedFrame.id;
}
selectedFrame = frames.find(frame => {
return !isFrameBlackBoxed(frame, blackboxedRanges);
});
return selectedFrame?.id;
}
async function updateFrameLocationAndDisplayName(frame, thunkArgs) {
// Ignore WASM original sources
if (frame.isOriginal) {
return frame;
}
const location = await getOriginalLocation(frame.location, thunkArgs, {
waitForSource: true,
});
// Avoid instantiating new frame objects if the frame location isn't mapped
if (location == frame.location) {
return frame;
}
// As we now know that this frame relates to an original source...
// Fetch the symbols for it and compute the frame's originalDisplayName.
const originalDisplayName = await thunkArgs.dispatch(
getOriginalFunctionDisplayName(location)
);
// As we modify frame object, fork it to force causing re-renders
return {
...frame,
location,
generatedLocation: frame.generatedLocation || frame.location,
originalDisplayName,
};
}
function isWasmOriginalSourceFrame(frame) {
if (!frame.location.source.isOriginal) {
return false;
}
return Boolean(frame.generatedLocation?.source.isWasm);
}
/**
* Wasm Source Maps can come with an non-standard "xScopes" attribute
* which allows mapping the scope of a given location.
*/
async function expandWasmFrames(frames, { getState, sourceMapLoader }) {
const result = [];
for (let i = 0; i < frames.length; ++i) {
const frame = frames[i];
if (frame.isOriginal || !isWasmOriginalSourceFrame(frame)) {
result.push(frame);
continue;
}
const originalFrames = await sourceMapLoader.getOriginalStackFrames(
debuggerToSourceMapLocation(frame.generatedLocation)
);
if (!originalFrames) {
result.push(frame);
continue;
}
assert(!!originalFrames.length, "Expected at least one original frame");
// First entry has no specific location -- use one from the generated frame.
originalFrames[0].location = frame.location;
originalFrames.forEach((originalFrame, j) => {
if (!originalFrame.location) {
return;
}
// Keep outer most frame with true actor ID, and generate unique
// one for the nested frames.
const id = j == 0 ? frame.id : `${frame.id}-originalFrame${j}`;
const originalFrameLocation = sourceMapToDebuggerLocation(
getState(),
originalFrame.location
);
result.push(
createWasmOriginalFrame(frame, id, originalFrame, originalFrameLocation)
);
});
}
return result;
}
/**
* Map call stack frame locations and display names to originals.
* e.g.
* 1. When the debuggee pauses
* 2. When a source is pretty printed
* 3. When symbols are loaded
* @memberof actions/pause
* @static
*/
export function mapFrames(thread) {
return async function (thunkArgs) {
const { dispatch, getState } = thunkArgs;
const frames = getFrames(getState(), thread);
if (!frames || !frames.length) {
return;
}
// Update frame's location/generatedLocation/originalDisplayNames in case it relates to an original source
let mappedFrames = await Promise.all(
frames.map(frame => updateFrameLocationAndDisplayName(frame, thunkArgs))
);
mappedFrames = await expandWasmFrames(mappedFrames, thunkArgs);
// Add the "library" attribute on all frame objects (if relevant)
annotateFramesWithLibrary(mappedFrames);
// After having mapped the frames, we should update the selected frame
// just in case the selected frame is now set on a blackboxed original source
const selectedFrameId = getSelectedFrameId(
getState(),
thread,
mappedFrames
);
dispatch({
type: "MAP_FRAMES",
thread,
frames: mappedFrames,
selectedFrameId,
});
};
}
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