A precision tool for statically calculating C structure member offsets and memory alignment without runtime execution.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install struct-offset-analyzer
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install struct-offset-analyzer using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is struct-offset-analyzer?
The struct-offset-analyzer is a specialized utility designed for developers, reverse engineers, and security researchers who need to understand the internal memory organization of C programs. By functioning as a part of the Openclaw Skills ecosystem, it allows users to determine the exact byte position of struct members through static source code analysis. This is particularly useful for analyzing complex data structures in large-scale libraries or kernel-level code where runtime debugging might be restricted. The tool identifies alignment requirements, handles nested definitions, and accounts for platform-specific padding rules to ensure high accuracy.
struct-offset-analyzer Use Cases
- Locating struct members during reverse engineering of binaries without debug symbols
- Confirming memory layouts during the debugging of low-level system integrations
- Analyzing data structures during security research to identify potential buffer vulnerabilities
- Understanding field positions for binary analysis and data extraction tasks
How struct-offset-analyzer Works
- Scan the project headers and source files to locate the primary struct or typedef definitions.
- Recursively resolve all nested types, enums, and constant definitions that affect the size of the structure.
- Apply architecture-specific alignment rules to calculate necessary padding between members and at the end of the struct.
- Output a comprehensive memory map featuring hexadecimal offsets for each member, providing a clear visual representation of the layout.
struct-offset-analyzer Setup
Integrating this tool with your Openclaw Skills setup requires access to standard CLI search utilities like grep to parse header files. Follow these steps to begin analysis:
# Find the declaration of a struct within a codebase
grep -n "struct target_st {" **/*.h
# Locate constant definitions used for array sizes
grep -n "#define MAX_BUFFER_SIZE" **/*.h
struct-offset-analyzer Data Schema & Taxonomy
The analysis organizes information into a structured layout that details the memory consumption of every component. This is essential for cross-referencing Openclaw Skills outputs with binary data. The output usually follows this schema:
| Attribute | Description |
|---|---|
| Offset(0x) | Hexadecimal position relative to the start of the struct |
| Member | Name of the field or padding indicator |
| Type | The C data type or typedef alias |
| Size | The byte size of the specific field |
struct-offset-analyzer Advanced Features
- Multi-platform support for calculating offsets in both 32-bit and 64-bit environments
- Automated detection of #pragma pack directives that modify standard memory alignment
- Context-aware analysis of #ifdef and #ifndef blocks to determine conditional member inclusion
- Advanced handling of union structures to map overlapping memory regions within the Openclaw Skills framework
SKILL.md
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