// SPDX-License-Identifier: BSD-3-Clause
//
// ConfigureAnalysis.java - Ghidra pre-script used by the Open-IOV CUDA
// tooling to make headless auto-analysis of a large stripped vendor library
// tractable and reproducible.
//
// The CUDA userspace driver is a ~70 MB, fully stripped x86-64 shared object
// with roughly a hundred thousand functions. The default analyzer set spends
// the majority of its time in the two optional "identifier" analyzers, which
// are not needed to obtain readable decompilation:
//
//   * Decompiler Parameter ID  - decompiles every function to recover
//                                parameter types (very expensive, no value
//                                for a stripped binary where we have no
//                                type definitions for internal structs)
//   * Function ID (FID)        - matches function bodies against .fidb
//                                signature databases (liberal, and we have
//                                no curated database for this toolchain)
//
// Everything else (disassembly, function start search, aggressive instruction
// finder, exception handling, stack analysis, reference analyzers, ...) is
// kept, because function discovery quality on a stripped binary depends on
// them.
//
// Usage (analyzeHeadless):
//   -preScript ConfigureAnalysis.java [verbose]
//
// Re-runnable: the same settings are applied on every analysis of a program.

import ghidra.app.script.GhidraScript;
import ghidra.framework.options.Options;

public class ConfigureAnalysis extends GhidraScript {

    private static final String[] DISABLE = {
        "Decompiler Parameter ID",
        "Function ID",
    };

    private static final String[] ENABLE = {
        "Aggressive Instruction Finder",
        "GCC Exception Handlers",
        "Function Start Search",
        "Shared Return Calls",
        "Non-Returning Functions - Known",
        "Non-Returning Functions - Discovered",
    };

    @Override
    public void run() throws Exception {
        boolean verbose = getScriptArgs().length > 0;
        Options opts = currentProgram.getOptions("Analyzers");

        if (verbose) {
            println("[ConfigureAnalysis] analyzer options before:");
            for (String name : opts.getOptionNames()) {
                println("  " + name + " = " + opts.getObject(name, null));
            }
        }

        for (String name : DISABLE) {
            if (opts.contains(name)) {
                opts.setBoolean(name, false);
                println("[ConfigureAnalysis] disabled: " + name);
            } else {
                println("[ConfigureAnalysis] WARN not found: " + name);
            }
        }

        for (String name : ENABLE) {
            if (opts.contains(name)) {
                opts.setBoolean(name, true);
                println("[ConfigureAnalysis] enabled: " + name);
            }
        }

        if (verbose) {
            println("[ConfigureAnalysis] analyzer options after:");
            for (String name : opts.getOptionNames()) {
                println("  " + name + " = " + opts.getObject(name, null));
            }
        }
    }
}