Function generateFridaHook

src/tools/frida.ts:126–163

* Generate Frida TypeScript hook code for a method.

(method: SmaliMethod)

 * Generate Frida TypeScript hook code for a method.
 */
function generateFridaHook(method: SmaliMethod): string {
    const javaParams = method.paramTypes.map(smaliTypeToJava);
    const javaReturn = smaliTypeToJava(method.returnType);

    const overloadArgs = javaParams.map((p) => `'${p}'`).join(", ");
    const hookParams = method.paramTypes.map((_, i) => `arg${i}`).join(", ");

    if (method.isConstructor && method.methodName === "<init>") {
        return `
// Hook: ${method.className}.<init>(${javaParams.join(", ")})
Java.perform(() => {
    const cls = Java.use('${method.className}');
    cls.$init.overload(${overloadArgs}).implementation = function(${hookParams}) {
        console.log(\`[*] ${method.className}.<init> called\`);
${javaParams.map((_, i) => `        console.log(\`    arg${i}: \${arg${i}}\`);`).join("\n")}
        return this.$init(${hookParams});
    };
});
`.trim();
    }

    const returnLine =
        javaReturn === "void"
            ? `this.${method.methodName}(${hookParams});`
            : `const ret = this.${method.methodName}(${hookParams});\n        console.log(\`    ret: \${ret}\`);\n        return ret;`;

    return `
// Hook: ${method.className}.${method.methodName}(${javaParams.join(", ")}): ${javaReturn}
Java.perform(() => {
    const cls = Java.use('${method.className}');
    cls.${method.methodName}.overload(${overloadArgs}).implementation = function(${hookParams}) {
        console.log(\`[*] ${method.className}.${method.methodName} called\`);
${javaParams.map((_, i) => `        console.log(\`    arg${i}: \${arg${i}}\`);`).join("\n")}
        ${returnLine}
    };
});
`.trim();
}

/**
 * Find the APKTool project root from a file path.