rea/src/cli/reverseEngineeringCommands.ts

import { z } from "incur";
import type { Logger } from "pino";

import { createReverseEngineeringService } from "../composition/reverseEngineering.js";
import { AnalysisError } from "../domain/analysisErrorBase.js";
import {
  AnalysisCancelledError,
  AnalysisInputError,
  AnalysisOutputError,
} from "../domain/analysisErrorCore.js";
import { evidenceSchema, type Evidence } from "../domain/evidence.js";
import type { JsonValue } from "../domain/jsonValue.js";
import type { Result } from "../domain/result.js";
import { err, ok } from "../domain/result.js";
import { projectAnalysisError } from "../domain/analysisErrorProjection.js";
import {
  OBJDUMP_ARTIFACT_OPERATIONS,
  reverseCommandTimeoutSchema,
} from "../domain/reverseEngineering.js";
import { logCliCommand } from "../cliLogging.js";
import type { CliInstance } from "./types.js";
import { withCommandCancellation } from "./commandCancellation.js";
import { CLI_COMMANDS } from "../cliCommandNames.js";
import type { ReverseEngineeringService } from "../application/reverse/ReverseEngineeringService.js";
import { gdbOneShotCommandMayInvalidateDetachProof } from "../gdb/GdbSessionManager.js";
import {
  createGdbSessionManager,
  createRizinDebugSessionManager,
} from "../composition/debuggerSessions.js";
import { ProviderCleanupError } from "../domain/providerCleanupError.js";
import {
  retainedDebuggerDiagnostics,
  retainedDebuggerProcessIds,
  retainedDebuggerRemediation,
} from "../process/ownedDebuggerCleanupError.js";
import {
  analysisEvidenceDeliveryOptions,
  cliEvidenceDeliveryInputError,
  deliverCliAnalysisEvidence,
  publishCliAnalysisEvidence,
} from "./analysisEvidenceDelivery.js";
import { finishAnalysisCommand } from "./finishAnalysisCommand.js";
import { projectCliAnalysisResult } from "./projectCliAnalysisResult.js";

const executeWithCleanup = async (
  service: ReverseEngineeringService,
  signal: AbortSignal,
  execute: () => Promise<Result<Evidence, AnalysisError>>,
): Promise<Result<Evidence, AnalysisError>> => {
  let result: Result<Evidence, AnalysisError>;
  try {
    result = await execute();
  } catch (cause) {
    await service.close().catch(() => undefined);
    throw cause;
  }
  const hadIncompleteCleanup = !result.ok && result.error.cleanupIncomplete;
  try {
    await service.close();
  } catch (cause) {
    if (result.ok) return err(asCleanupError(cause));
    const cleanup = cause instanceof AnalysisError ? cause.cleanup : undefined;
    const error = new AnalysisOutputError(
      "reverse_engineering_cleanup",
      "Provider cleanup remains incomplete after the command failed.",
      {
        cause: result.error,
        ...(cleanup === undefined ? {} : { cleanup }),
        ...(result.error.capturedOutput === undefined
          ? {}
          : { capturedOutput: result.error.capturedOutput }),
        ...(result.error.partialObservation === undefined
          ? {}
          : { partialObservation: result.error.partialObservation }),
      },
    );
    return err(error);
  }
  if (!result.ok && hadIncompleteCleanup && !result.error.cleanupIncomplete) {
    const evidence = cleanupOnlyCompleteEvidence(result.error);
    if (evidence !== undefined)
      return cancelledAfterCleanup({ ok: true, value: evidence }, signal);
  }
  return cancelledAfterCleanup(result, signal);
};

/** Late cancellation observed during finalization keeps the completed Evidence as partial data. */
const cancelledAfterCleanup = (
  result: Result<Evidence, AnalysisError>,
  signal: AbortSignal,
): Result<Evidence, AnalysisError> =>
  result.ok && signal.aborted
    ? err(
        new AnalysisCancelledError(result.value.operation, {
          cause: signal.reason,
          partialObservation: result.value,
        }),
      )
    : result;

const cleanupOnlyCompleteEvidence = (
  error: AnalysisError,
): Evidence | undefined => {
  if (
    !(error instanceof AnalysisOutputError) ||
    !error.cleanupOnly ||
    error.partialObservation === undefined
  )
    return undefined;
  const parsed = evidenceSchema.safeParse(error.partialObservation);
  if (!parsed.success) return undefined;
  const normalized = parsed.data.normalized_result;
  return typeof normalized === "object" &&
    normalized !== null &&
    !Array.isArray(normalized) &&
    normalized.completion_status === "complete"
    ? parsed.data
    : undefined;
};

const asCleanupError = (cause: unknown): AnalysisError =>
  cause instanceof AnalysisError
    ? cause
    : new AnalysisOutputError(
        "reverse_engineering_cleanup",
        "Provider process cleanup failed.",
        { cause },
      );

/** One-shot debugger cleanup: the retained owner's closeAll decides whether cleanup remains incomplete. */
const closeDebuggerCommandSession = async (
  manager: {
    close(sessionId: string): Promise<Result<unknown, AnalysisError>>;
    closeAll(): Promise<void>;
  },
  sessionId: string | undefined,
  providerId: string,
  operation: string,
  log: (cleanup: JsonValue | string) => void,
): Promise<void> => {
  if (sessionId !== undefined) {
    try {
      const closed = await manager.close(sessionId);
      if (!closed.ok) log(projectAnalysisError(closed.error));
    } catch (cause) {
      log(cause instanceof Error ? cause.message : "Unknown cleanup failure");
    }
  }
  try {
    await manager.closeAll();
  } catch (cause) {
    // This process is the only owner, so a caller gets the debugger to check
    // rather than a retry that no later command could perform.
    const retainedPids = retainedDebuggerProcessIds(cause);
    throw new ProviderCleanupError(
      providerId,
      sessionId === undefined ? [] : [sessionId],
      {
        reason:
          cause instanceof AggregateError
            ? cause.errors
                .map((error: unknown) =>
                  error instanceof Error ? error.message : String(error),
                )
                .join("; ")
            : cause instanceof Error
              ? cause.message
              : String(cause),
        ...retainedDebuggerDiagnostics(cause),
      },
      {
        cause,
        operation,
        ...(retainedPids.length === 0
          ? {}
          : { remediationAction: retainedDebuggerRemediation(retainedPids) }),
      },
    );
  }
};

/** Add one-shot reverse-engineering commands using the shared service layer. */
export const registerReverseEngineeringCommands = (
  cli: CliInstance,
  logger: Logger,
  environment: Readonly<NodeJS.ProcessEnv>,
  createGdbManager: (
    environment: Readonly<NodeJS.ProcessEnv>,
  ) => ReturnType<typeof createGdbSessionManager> = createGdbSessionManager,
  createService: typeof createReverseEngineeringService = createReverseEngineeringService,
): void => {
  const service = createService(environment);
  cli.command(CLI_COMMANDS.inspectWithObjdump, {
    description:
      "Inspect a local artifact with GNU objdump and retain its raw output as Evidence",
    args: z.object({
      path: z
        .string()
        .min(1)
        .describe("Path to the local artifact to inspect."),
      operation: z
        .enum(OBJDUMP_ARTIFACT_OPERATIONS)
        .describe("GNU objdump inspection operation to run."),
    }),
    options: z.object({
      ...analysisEvidenceDeliveryOptions,
      symbol: z
        .string()
        .optional()
        .describe(
          "Native symbol to select with the disassemble operation; GNU objdump controls matching and boundaries.",
        ),
      followDebugLinks: z
        .boolean()
        .default(false)
        .describe(
          "Follow local DWARF debug links. External debug-file identity is not bound to Evidence.",
        ),
      commandTimeoutMs: reverseCommandTimeoutSchema,
    }),
    run: ({ args, options }) =>
      withCommandCancellation((signal) =>
        logCliCommand(logger, CLI_COMMANDS.inspectWithObjdump, async () => {
          const delivery = {
            providerId: "gnu.objdump",
            operation: "inspect_with_objdump",
            signal,
            detail: options.detail,
            evidenceOutput: options.evidence_output,
          };
          const inputError = cliEvidenceDeliveryInputError(delivery);
          if (inputError !== undefined) return projectAnalysisError(inputError);
          const result = await executeWithCleanup(service, signal, () =>
            service.inspectWithObjdump(
              {
                ...args,
                follow_debug_links: options.followDebugLinks,
                ...(options.symbol === undefined
                  ? {}
                  : { symbol: options.symbol }),
                ...(options.commandTimeoutMs === undefined
                  ? {}
                  : { command_timeout_ms: options.commandTimeoutMs }),
              },
              { signal },
            ),
          );
          return result.ok
            ? publishCliAnalysisEvidence(
                { ok: true, value: result.value },
                delivery,
              )
            : projectAnalysisError(result.error);
        }),
      ),
  });
  cli.command(CLI_COMMANDS.listObjdumpArchitectures, {
    description: "List BFD targets advertised by the installed GNU objdump",
    args: z.object({}),
    options: z.object({
      ...analysisEvidenceDeliveryOptions,
      commandTimeoutMs: reverseCommandTimeoutSchema,
    }),
    run: ({ options }) =>
      withCommandCancellation((signal) =>
        logCliCommand(
          logger,
          CLI_COMMANDS.listObjdumpArchitectures,
          async () => {
            const delivery = {
              providerId: "gnu.objdump",
              operation: "inspect_with_objdump",
              signal,
              detail: options.detail,
              evidenceOutput: options.evidence_output,
            };
            const inputError = cliEvidenceDeliveryInputError(delivery);
            if (inputError !== undefined)
              return projectAnalysisError(inputError);
            const result = await executeWithCleanup(service, signal, () =>
              service.inspectWithObjdump(
                {
                  operation: "architectures",
                  ...(options.commandTimeoutMs === undefined
                    ? {}
                    : { command_timeout_ms: options.commandTimeoutMs }),
                },
                { signal },
              ),
            );
            return result.ok
              ? publishCliAnalysisEvidence(
                  { ok: true, value: result.value },
                  delivery,
                )
              : projectAnalysisError(result.error);
          },
        ),
      ),
  });
  cli.command(CLI_COMMANDS.executeRizinCommand, {
    description: "Execute one Rizin command against a local artifact",
    args: z.object({
      path: z
        .string()
        .min(1)
        .describe("Path to the local artifact to analyze."),
      command: z.string().min(1).describe("One caller-selected Rizin command."),
    }),
    options: z.object({
      commandTimeoutMs: reverseCommandTimeoutSchema,
    }),
    run: ({ args, options }) =>
      withCommandCancellation((signal) =>
        logCliCommand(logger, CLI_COMMANDS.executeRizinCommand, async () => {
          const result = await executeWithCleanup(service, signal, () =>
            service.executeRizinCommand(
              {
                ...args,
                ...(options.commandTimeoutMs === undefined
                  ? {}
                  : { command_timeout_ms: options.commandTimeoutMs }),
              },
              { signal },
            ),
          );
          return result.ok ? result.value : projectAnalysisError(result.error);
        }),
      ),
  });
  cli.command(CLI_COMMANDS.debugWithGdb, {
    description:
      "Run one unrestricted GDB console command in an ephemeral MI session; provide an inferior TTY so a live target can be safely detached",
    args: z.object({
      command: z
        .string()
        .min(1)
        .describe("One unrestricted GDB console command."),
    }),
    options: z.object({
      inferiorTty: z
        .string()
        .min(1)
        .describe(
          "Caller-selected durable TTY for output from a live GDB inferior.",
        ),
      ...analysisEvidenceDeliveryOptions,
    }),
    run: ({ args, options }) =>
      withCommandCancellation((signal) =>
        logCliCommand(logger, CLI_COMMANDS.debugWithGdb, async () => {
          const delivery = {
            providerId: "gdb",
            operation: "gdb_console",
            signal,
            detail: options.detail,
            evidenceOutput: options.evidence_output,
          };
          const inputError = cliEvidenceDeliveryInputError(delivery);
          if (inputError !== undefined) return projectAnalysisError(inputError);
          if (gdbOneShotCommandMayInvalidateDetachProof(args.command))
            return projectAnalysisError(
              new AnalysisInputError("gdb_console", undefined, [
                {
                  path: ["command"],
                  reason: "invalid_value",
                  message:
                    "This command can invalidate the verified inferior output route; use the persistent GDB session workflow.",
                },
              ]),
            );
          const manager = createGdbManager(environment);
          let sessionId: string | undefined;
          return deliverCliAnalysisEvidence({
            ...delivery,
            run: async () => {
              const started = await manager.start(signal, {
                inferiorTty: options.inferiorTty,
              });
              if (!started.ok) return err(started.error);
              sessionId = started.value.session_id;
              const executed = await manager.execute(
                sessionId,
                args.command,
                signal,
              );
              return executed.ok
                ? ok(executed.value.evidence)
                : err(executed.error);
            },
            service: {
              close: () =>
                closeDebuggerCommandSession(
                  manager,
                  sessionId,
                  "gdb",
                  "gdb_console",
                  (cleanup) =>
                    logger.error(
                      { command: CLI_COMMANDS.debugWithGdb, cleanup },
                      "GDB cleanup failed after collecting command output",
                    ),
                ),
            },
          });
        }),
      ),
  });
  cli.command(CLI_COMMANDS.debugWithRizin, {
    description:
      "Run one unrestricted Rizin debugger command in an ephemeral session",
    args: z.object({
      path: z.string().min(1).describe("Path to the local artifact to debug."),
      command: z
        .string()
        .min(1)
        .describe("One unrestricted Rizin debugger command.")
        .refine((value) => !/[\r\n]/u.test(value)),
    }),
    options: z.object({
      inferiorTty: z
        .string()
        .min(1)
        .describe("Caller-selected Linux TTY for inferior stdout and stderr."),
      backend: z
        .string()
        .min(1)
        .optional()
        .describe("Optional Rizin IO debugger backend name."),
    }),
    run: ({ args, options }) =>
      withCommandCancellation((signal) =>
        logCliCommand(logger, CLI_COMMANDS.debugWithRizin, async () => {
          const manager = createRizinDebugSessionManager(environment);
          let sessionId: string | undefined;
          return finishAnalysisCommand(
            async () => {
              const started = await manager.start(
                {
                  ...args,
                  inferior_tty: options.inferiorTty,
                  ...(options.backend === undefined
                    ? {}
                    : { backend: options.backend }),
                },
                signal,
              );
              if (!started.ok) return err(started.error);
              sessionId = started.value.session_id;
              const executed = await manager.execute(
                sessionId,
                args.command,
                signal,
              );
              return executed.ok
                ? ok(executed.value.evidence)
                : err(executed.error);
            },
            {
              close: () =>
                closeDebuggerCommandSession(
                  manager,
                  sessionId,
                  "rizin",
                  "rizin_debug_command",
                  (cleanup) =>
                    logger.error(
                      { command: CLI_COMMANDS.debugWithRizin, cleanup },
                      "Rizin cleanup failed after collecting command output",
                    ),
                ),
            },
            "rizin",
            "rizin_debug_command",
            signal,
          ).then(projectCliAnalysisResult);
        }),
      ),
  });
};