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| author | johannst <johannst@users.noreply.github.com> | 2020-04-28 09:11:18 +0000 |
|---|---|---|
| committer | johannst <johannst@users.noreply.github.com> | 2020-04-28 09:11:18 +0000 |
| commit | 15230bbb9b1f69def9b0e1b41a097638c0fda734 (patch) | |
| tree | 2b490b2f0b8d6f3eab0af91c7ba5cc557b540af6 /gdb.html | |
| parent | ce1a0eaa58f7ad07c5389996a90c4b02bdf573fc (diff) | |
| download | notes-15230bbb9b1f69def9b0e1b41a097638c0fda734.tar.gz notes-15230bbb9b1f69def9b0e1b41a097638c0fda734.zip | |
deploy: fef4d6ff2ad9f48e6dccde0f061453e6a3ac624e
Diffstat (limited to 'gdb.html')
| -rw-r--r-- | gdb.html | 358 |
1 files changed, 0 insertions, 358 deletions
diff --git a/gdb.html b/gdb.html deleted file mode 100644 index c1e69e2..0000000 --- a/gdb.html +++ /dev/null @@ -1,358 +0,0 @@ -<!DOCTYPE HTML> -<html lang="en" class="sidebar-visible no-js light"> - <head> - <!-- Book generated using mdBook --> - <meta charset="UTF-8"> - <title>gdb - Notes</title> - - - <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> - <meta name="description" content=""> - <meta name="viewport" content="width=device-width, initial-scale=1"> - <meta name="theme-color" content="#ffffff" /> - - <link rel="shortcut icon" href="favicon.png"> - <link rel="stylesheet" href="css/variables.css"> - <link rel="stylesheet" href="css/general.css"> - <link rel="stylesheet" href="css/chrome.css"> - <link rel="stylesheet" href="css/print.css" media="print"> - - <!-- Fonts --> - <link rel="stylesheet" href="FontAwesome/css/font-awesome.css"> - <link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css"> - <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500" rel="stylesheet" type="text/css"> - - <!-- Highlight.js Stylesheets --> - <link rel="stylesheet" href="highlight.css"> - <link rel="stylesheet" href="tomorrow-night.css"> - <link rel="stylesheet" href="ayu-highlight.css"> - - <!-- Custom theme stylesheets --> - - - - </head> - <body> - <!-- Provide site root to javascript --> - <script type="text/javascript"> - var path_to_root = ""; - var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? 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- </script> - - <!-- Hide / unhide sidebar before it is displayed --> - <script type="text/javascript"> - var html = document.querySelector('html'); - var sidebar = 'hidden'; - if (document.body.clientWidth >= 1080) { - try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { } - sidebar = sidebar || 'visible'; - } - html.classList.remove('sidebar-visible'); - html.classList.add("sidebar-" + sidebar); - </script> - - <nav id="sidebar" class="sidebar" aria-label="Table of contents"> - <div id="sidebar-scrollbox" class="sidebar-scrollbox"> - <ol class="chapter"><li class="expanded "><a href="ld.so.html"><strong aria-hidden="true">1.</strong> ld.so</a></li><li class="expanded "><a href="git.html"><strong aria-hidden="true">2.</strong> git</a></li><li class="expanded "><a href="bash.html"><strong aria-hidden="true">3.</strong> bash</a></li><li class="expanded "><a href="zsh.html"><strong aria-hidden="true">4.</strong> zsh</a></li><li class="expanded "><a href="tmux.html"><strong aria-hidden="true">5.</strong> tmux</a></li><li class="expanded "><a href="awk.html"><strong aria-hidden="true">6.</strong> awk</a></li><li class="expanded "><a href="gdb.html" class="active"><strong aria-hidden="true">7.</strong> gdb</a></li><li class="expanded "><a href="radare2.html"><strong aria-hidden="true">8.</strong> radare2</a></li><li class="expanded "><a href="emacs.html"><strong aria-hidden="true">9.</strong> emacs</a></li><li class="expanded "><a href="fish.html"><strong aria-hidden="true">10.</strong> fish</a></li><li class="expanded "><a href="strace.html"><strong aria-hidden="true">11.</strong> strace</a></li><li class="expanded "><a href="lsof.html"><strong aria-hidden="true">12.</strong> lsof</a></li><li class="expanded "><a href="pidstat.html"><strong aria-hidden="true">13.</strong> pidstat</a></li><li class="expanded "><a href="time.html"><strong aria-hidden="true">14.</strong> time</a></li><li class="expanded "><a href="pgrep.html"><strong aria-hidden="true">15.</strong> pgrep</a></li><li class="expanded "><a href="pstack.html"><strong aria-hidden="true">16.</strong> pstack</a></li><li class="expanded "><a href="perf.html"><strong aria-hidden="true">17.</strong> perf</a></li><li class="expanded "><a href="oprofile.html"><strong aria-hidden="true">18.</strong> OProfile</a></li><li class="expanded "><a href="od.html"><strong aria-hidden="true">19.</strong> od</a></li><li class="expanded "><a href="xxd.html"><strong aria-hidden="true">20.</strong> xxd</a></li><li class="expanded "><a href="readelf.html"><strong aria-hidden="true">21.</strong> readelf</a></li><li class="expanded "><a href="objdump.html"><strong aria-hidden="true">22.</strong> objdump</a></li><li class="expanded "><a href="nm.html"><strong aria-hidden="true">23.</strong> nm</a></li><li class="expanded "><a href="c++filt.html"><strong aria-hidden="true">24.</strong> c++filt</a></li><li class="expanded "><a href="c++.html"><strong aria-hidden="true">25.</strong> c++</a></li><li class="expanded "><a href="glibc.html"><strong aria-hidden="true">26.</strong> glibc</a></li><li class="expanded "><a href="gcc.html"><strong aria-hidden="true">27.</strong> gcc</a></li></ol> - </div> - <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> - </nav> - - <div id="page-wrapper" class="page-wrapper"> - - <div class="page"> - - <div id="menu-bar" class="menu-bar"> - <div id="menu-bar-sticky-container"> - <div class="left-buttons"> - <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar"> - <i class="fa fa-bars"></i> - </button> - <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list"> - <i class="fa fa-paint-brush"></i> - </button> - <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu"> - <li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li> - <li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li> - <li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li> - <li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li> - <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li> - </ul> - - <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar"> - <i class="fa fa-search"></i> - </button> - - </div> - - <h1 class="menu-title">Notes</h1> - - <div class="right-buttons"> - <a href="print.html" title="Print this book" aria-label="Print this book"> - <i id="print-button" class="fa fa-print"></i> - </a> - - </div> - </div> - </div> - - - <div id="search-wrapper" class="hidden"> - <form id="searchbar-outer" class="searchbar-outer"> - <input type="search" name="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header"> - </form> - <div id="searchresults-outer" class="searchresults-outer hidden"> - <div id="searchresults-header" class="searchresults-header"></div> - <ul id="searchresults"> - </ul> - </div> - </div> - - - <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM --> - <script type="text/javascript"> - document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible'); - document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible'); - Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) { - link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1); - }); - </script> - - <div id="content" class="content"> - <main> - <h1><a class="header" href="#gdb1" id="gdb1">gdb(1)</a></h1> -<h1><a class="header" href="#cli" id="cli">CLI</a></h1> -<pre><code class="language-markdown"> gdb [opts] [prg [-c coredump | -p pid]] - gdb [opts] --args prg <prg-args> - opts: - -p <pid> attach to pid - -c <coredump> use <coredump> - -x <file> execute script <file> before prompt - -ex <cmd> execute command <cmd> before prompt - --tty <tty> set I/O tty for debugee -</code></pre> -<h1><a class="header" href="#interactive-usage" id="interactive-usage">Interactive usage</a></h1> -<pre><code class="language-markdown"> tty <tty> - Set <tty> as tty for debugee. - Make sure nobody reads from target tty, easiest is to spawn a shell - and run following in target tty: - > while true; do sleep 1024; done - - set follow-fork-mode <child | parent> - Specify which process to follow when debuggee makes a fork(2) - syscall. - - sharedlibrary [<regex>] - Load symbols of shared libs loaded by debugee. Optionally use <regex> - to filter libs for symbol loading. - - break [-qualified] <sym> thread <tnum> - Set a breakpoint only for a specific thread. - -qualified: Tred <sym> as fully qualified symbol (quiet handy to set - breakpoints on C symbols in C++ contexts) - - rbreak <regex> - Set breakpoints matching <regex>, where matching internally is done - on: .*<regex>.* - - command [<bp_list>] - Define commands to run after breakpoint hit. If <bp_list> is not - specified attach command to last created breakpoint. Command block - terminated with 'end' token. - - <bp_list>: Space separates list, eg 'command 2 5-8' to run command - for breakpoints: 2,5,6,7,8. - - info functions [<regex>] - List functions matching <regex>. List all functions if no <regex> - provided. - - info variables [<regex>] - List variables matching <regex>. List all variables if no <regex> - provided. - - info handle [<signal>] - Print how to handle <signal>. If no <signal> specified print for all - signals. - - handle <signal> <action> - Configure how gdb handles <signal> sent to debugee. - <action>: - stop/nostop Catch signal in gdb and break. - print/noprint Print message when gdb catches signal. - pass/nopass Pass signal down to debugee. - - catch signal <signal> - Create a catchpoint for <signal>. -</code></pre> -<h1><a class="header" href="#user-commands-macros" id="user-commands-macros">User commands (macros)</a></h1> -<p>Gdb allows to create & document user commands as follows:</p> -<pre><code class="language-markdown"> define <cmd> - # cmds - end - - document <cmd> - # docu - end -</code></pre> -<p>To get all user commands or documentations one can use:</p> -<pre><code class="language-markdown"> help user-defined - help <cmd> -</code></pre> -<h1><a class="header" href="#hooks" id="hooks">Hooks</a></h1> -<p>Gdb allows to create two types of command <code>hooks</code></p> -<ul> -<li><code>hook-</code> will be run before <code><cmd></code></li> -<li><code>hookpost-</code> will be run after <code><cmd></code></li> -</ul> -<pre><code class="language-markdown"> define hook-<cmd> - # cmds - end - - define hookpost-<cmd> - # cmds - end -</code></pre> -<h1><a class="header" href="#examples" id="examples">Examples</a></h1> -<h2><a class="header" href="#catch-sigsegv-and-execute-commands" id="catch-sigsegv-and-execute-commands">Catch SIGSEGV and execute commands</a></h2> -<p>This creates a <code>catchpoint</code> for the <code>SIGSEGV</code> signal and attached the <code>command</code> -to it.</p> -<pre><code class="language-markdown"> catch signal SIGSEGV - command - bt - c - end -</code></pre> -<h2><a class="header" href="#run-backtrace-on-thread-1-batch-mode" id="run-backtrace-on-thread-1-batch-mode">Run <code>backtrace</code> on thread 1 (batch mode)</a></h2> -<pre><code class="language-markdown"> gdb --batch -ex 'thread 1' -ex 'bt' -p <pid> -</code></pre> -<h2><a class="header" href="#script-gdb-for-automating-debugging-sessions" id="script-gdb-for-automating-debugging-sessions">Script gdb for automating debugging sessions</a></h2> -<p>To script gdb add commands into a file and pass it to gdb via <code>-x</code>. -For example create <code>run.gdb</code>:</p> -<pre><code class="language-markdown"> set pagination off - - break mmap - command - info reg rdi rsi rdx - bt - c - end - - #initial drop - c -</code></pre> -<p>This script can be used as:</p> -<pre><code class="language-markdown"> gdb --batch -x ./run.gdb -p <pid> -</code></pre> -<h1><a class="header" href="#know-bugs" id="know-bugs">Know Bugs</a></h1> -<h2><a class="header" href="#workaround-command--finish-bug" id="workaround-command--finish-bug">Workaround <code>command + finish</code> bug</a></h2> -<p>When using <code>finish</code> inside a <code>command</code> block, commands after <code>finish</code> are not -executed. To workaround that bug one can create a wrapper function which calls -<code>finish</code>.</p> -<pre><code class="language-markdown"> define handler - bt - finish - info reg rax - end - - command - handler - end -</code></pre> - - </main> - - <nav class="nav-wrapper" aria-label="Page navigation"> - <!-- Mobile navigation buttons --> - - <a rel="prev" href="awk.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> - <i class="fa fa-angle-left"></i> - </a> - - - - <a rel="next" href="radare2.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> - <i class="fa fa-angle-right"></i> - </a> - - - <div style="clear: both"></div> - </nav> - </div> - </div> - - <nav class="nav-wide-wrapper" aria-label="Page navigation"> - - <a href="awk.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> - <i class="fa fa-angle-left"></i> - </a> - - - - <a href="radare2.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> - <i class="fa fa-angle-right"></i> - </a> - - </nav> - - </div> - - - - - - - - - <script type="text/javascript"> - window.playpen_copyable = true; - </script> - - - - - - <script src="elasticlunr.min.js" type="text/javascript" charset="utf-8"></script> - <script src="mark.min.js" type="text/javascript" charset="utf-8"></script> - <script src="searcher.js" type="text/javascript" charset="utf-8"></script> - - - <script src="clipboard.min.js" type="text/javascript" charset="utf-8"></script> - <script src="highlight.js" type="text/javascript" charset="utf-8"></script> - <script src="book.js" type="text/javascript" charset="utf-8"></script> - - <!-- Custom JS scripts --> - - - - - </body> -</html> |