Method backtraceByFramePointer

agent/debugger.ts:781–807

(context: CpuContext)

    }

    private backtraceByFramePointer(context: CpuContext): NativePointer[] {
        const frames: NativePointer[] = [context.pc];
        let fp = this.getFramePointer(context);
        const sp = this.getStackPointer(context);
        if (fp === null || sp === null || fp.compare(sp) < 0) {
            return frames;
        }

        for (let depth = 0; depth < 32; depth++) {
            try {
                const lr = fp.add(Process.pointerSize).readPointer();
                if (!lr.isNull()) {
                    frames.push(lr);
                }

                const nextFp = fp.readPointer();
                if (nextFp.isNull() || nextFp.compare(fp) <= 0) {
                    break;
                }
                fp = nextFp;
            } catch (_error) {
                break;
            }
        }

        return frames;
    }

    private mergeBacktraceFrames(primary: NativePointer[], fallback: NativePointer[]): NativePointer[] {
        const seen = new Set<string>();