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abstractsyntaxtree_demo.ipynb
{
"cells": [
{
"cell_type": "markdown",
"metadata": {
"id": "view-in-github",
"colab_type": "text"
},
"source": [
"<a href=\"https://colab.research.google.com/gist/maciejskorski/65e877d738d1e9d6adcda631973aa7e5/abstractsyntaxtree_demo.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
]
},
{
"cell_type": "markdown",
"source": [
"![Colab](https://img.shields.io/badge/Google-Colab-F9AB00?style=plain&logo=googlecolab&color=525252)\n",
"[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)\n",
"\n",
"# Summary\n",
"\n",
"This notebook demonstrates how to create and visualize an [Abstract Syntax Tree](https://en.wikipedia.org/wiki/Abstract_syntax_tree) of programming code, using `libclang` for parsing and `graphivz` for visualization. \n",
"\n",
"The example provided runs on the [tcpdump](https://github.com/the-tcpdump-group/tcpdump) project written in [C99](https://en.wikipedia.org/wiki/C99). The task is to visualize functions and their arguments, including types and declaration locations. Enjoy!"
],
"metadata": {
"id": "garWdMr_BQ7v"
}
},
{
"cell_type": "markdown",
"source": [
"## Prerequisites"
],
"metadata": {
"id": "CFhWOcNeDl3f"
}
},
{
"cell_type": "code",
"execution_count": 8,
"metadata": {
"id": "BG7Mwk4mJS-e"
},
"outputs": [],
"source": [
"!pip install libclang graphviz --quiet\n",
"!git clone https://github.com/the-tcpdump-group/tcpdump.git --quiet"
]
},
{
"cell_type": "markdown",
"source": [
"## Parser"
],
"metadata": {
"id": "VwWug60NDqbZ"
}
},
{
"cell_type": "code",
"source": [
"import clang\n",
"from clang.cindex import Index, Config, CursorKind, TypeKind\n",
"\n",
"SCRIPT_PATH = \"./tcpdump/print-ppp.c\"\n",
"\n",
"# C99 is a proper compiler for tcpdump, as per docs\n",
"index = Index.create()\n",
"translation_unit = index.parse(SCRIPT_PATH, args=[\"-std=c99\"])\n",
"\n",
"# filter to nodes in the root script (ignore imported!)\n",
"script_node = translation_unit.cursor\n",
"all_nodes = script_node.get_children()\n",
"all_nodes = filter(lambda c: c.location.file.name == SCRIPT_PATH, all_nodes)\n",
"\n",
"# filter to function nodes\n",
"func_nodes = filter(lambda c: c.kind == clang.cindex.CursorKind.FUNCTION_DECL, all_nodes)"
],
"metadata": {
"id": "aOsQ7c_WrYqZ",
"colab": {
"base_uri": "https://localhost:8080/"
},
"outputId": "656ea821-4b65-481b-9a26-ac4e9b95914a"
},
"execution_count": 10,
"outputs": [
{
"output_type": "execute_result",
"data": {
"text/plain": [
"[<clang.cindex.Cursor at 0x7fb11e2460c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246140>,\n",
" <clang.cindex.Cursor at 0x7fb11e2461c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246240>,\n",
" <clang.cindex.Cursor at 0x7fb11e2462c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246340>,\n",
" <clang.cindex.Cursor at 0x7fb11e2463c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246440>,\n",
" <clang.cindex.Cursor at 0x7fb11e246540>,\n",
" <clang.cindex.Cursor at 0x7fb11e2465c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246640>,\n",
" <clang.cindex.Cursor at 0x7fb11e2466c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246740>,\n",
" <clang.cindex.Cursor at 0x7fb11e2467c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246840>,\n",
" <clang.cindex.Cursor at 0x7fb11e2468c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246940>,\n",
" <clang.cindex.Cursor at 0x7fb11e2469c0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246a40>,\n",
" <clang.cindex.Cursor at 0x7fb11e246ac0>,\n",
" <clang.cindex.Cursor at 0x7fb11e246b40>,\n",
" <clang.cindex.Cursor at 0x7fb11e246bc0>]"
]
},
"metadata": {},
"execution_count": 10
}
]
},
{
"cell_type": "code",
"source": [
"import re\n",
"\n",
"rgx = r'(commit\\s[0-9,a-f]{40})(.*?)(?=commit\\s[0-9,a-f]{40}|\\Z)'\n",
"\n",
"text = '''commit 8e018dbcdbff15c3fc9ef4460b4214f47f71ddf6\n",
"Author: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\n",
"Date: Fri Apr 28 18:58:00 2023 +0800\n",
"\n",
" new cat\n",
"\n",
"commit 9274b33435238122c8d6d389e73266f6a3e68745\n",
"Author: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\n",
"Date: Wed Apr 19 11:04:04 2023 +0800\n",
"\n",
" meow\n",
"\n",
"commit 4f113912741f753c75a44f18790ff5903e910fad\n",
"Author: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\n",
"Date: Fri Apr 14 17:55:55 2023 +0800\n",
"\n",
" Add test files\n",
"\n",
"commit 87053deb6ad07fa1ea6dd7a5acfee075ce5b6322\n",
"Author: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\n",
"Date: Fri Apr 14 15:16:57 2023 +0800\n",
"\n",
" Add cat.jpg\n",
"'''\n",
"\n",
"re.findall(rgx, text, re.DOTALL)"
],
"metadata": {
"colab": {
"base_uri": "https://localhost:8080/"
},
"id": "Zj-L3p7QgG0a",
"outputId": "c07a4317-0c55-44d4-a2c3-65c6c7599281"
},
"execution_count": 130,
"outputs": [
{
"output_type": "execute_result",
"data": {
"text/plain": [
"[('commit 8e018dbcdbff15c3fc9ef4460b4214f47f71ddf6',\n",
" '\\nAuthor: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\\nDate: Fri Apr 28 18:58:00 2023 +0800\\n\\n new cat\\n\\n'),\n",
" ('commit 9274b33435238122c8d6d389e73266f6a3e68745',\n",
" '\\nAuthor: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\\nDate: Wed Apr 19 11:04:04 2023 +0800\\n\\n meow\\n\\n'),\n",
" ('commit 4f113912741f753c75a44f18790ff5903e910fad',\n",
" '\\nAuthor: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\\nDate: Fri Apr 14 17:55:55 2023 +0800\\n\\n Add test files\\n\\n'),\n",
" ('commit 87053deb6ad07fa1ea6dd7a5acfee075ce5b6322',\n",
" '\\nAuthor: ISAAC.NEWTON <ISAAC.NEWTON@GOOGLE.COM>\\nDate: Fri Apr 14 15:16:57 2023 +0800\\n\\n Add cat.jpg\\n')]"
]
},
"metadata": {},
"execution_count": 130
}
]
},
{
"cell_type": "code",
"source": [
"txt = '8e018dbcdbff15c3fc9ef4460b4214f47f71ddf6'\n",
"rgx = '[0-9,a-e]{1,}'\n"
],
"metadata": {
"colab": {
"base_uri": "https://localhost:8080/"
},
"id": "DbTG0Qm1pSMK",
"outputId": "e525cf7d-0bdc-4759-a343-d95951f2646c"
},
"execution_count": 100,
"outputs": [
{
"output_type": "execute_result",
"data": {
"text/plain": [
"<re.Match object; span=(0, 10), match='8e018dbcdb'>"
]
},
"metadata": {},
"execution_count": 100
}
]
},
{
"cell_type": "markdown",
"source": [
"## Visualization"
],
"metadata": {
"id": "Z--d6MBIDyKy"
}
},
{
"cell_type": "code",
"source": [
"from graphviz import Digraph\n",
"\n",
"dot = Digraph(strict=True)\n",
"dot.attr(rankdir=\"LR\", size=\"20,100\", fontsize=\"6\")\n",
"\n",
"node_args = {\"fontsize\": \"8pt\", \"edgefontsize\": \"6pt\"}\n",
"\n",
"for fn in func_nodes:\n",
" fn_node_name = f\"{fn.spelling}\\nL{fn.location.line}\"\n",
" dot.node(fn_node_name, **node_args)\n",
" for i, arg in enumerate(fn.get_arguments(), start=1):\n",
" arg_node_name = arg.type.get_canonical().spelling\n",
" dot.node(arg_node_name, **node_args)\n",
" dot.edge(fn_node_name, arg_node_name)\n",
" t = arg.type\n",
" # handle pointers by describing their pointees\n",
" if t.kind == TypeKind.POINTER:\n",
" declr = t.get_pointee().get_declaration()\n",
" else:\n",
" declr = t.get_declaration()\n",
" declr_file = f\"{declr.location.file}\"\n",
" dot.node(declr_file, **node_args)\n",
" dot.edge(\n",
" arg_node_name, declr_file, label=f\"L{declr.location.line}\", fontsize=\"6pt\"\n",
" )\n",
"\n",
"from IPython.display import display_svg\n",
"display_svg(dot)"
],
"metadata": {
"id": "Hp6c0T1dzAXl",
"colab": {
"base_uri": "https://localhost:8080/",
"height": 1000
},
"outputId": "3d53f58d-b4ab-43df-8d3f-0126c52e3f17"
},
"execution_count": null,
"outputs": [
{
"output_type": "execute_result",
"data": {
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]
},
{
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"metadata": {
"id": "CfMYK8Y6FPip"
},
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"outputs": []
}
],
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"name": "python3"
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"language_info": {
"name": "python"
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