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0001 <!DOCTYPE html> 0002 <html><head> 0003 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 0004 <title>highlight.gdb</title> 0005 <meta name="generator" content="KF5::SyntaxHighlighting - Definition (GDB) - Theme (Breeze Light)"/> 0006 </head><body style="background-color:#ffffff;color:#1f1c1b"><pre> 0007 GNU gdb (GDB) 8.1 0008 Copyright (C) 2018 Free Software Foundation, Inc. 0009 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 0010 This is free software: you are free to change and redistribute it. 0011 There is NO WARRANTY, to the extent permitted by law. Type "show copying" 0012 and "show warranty" for details. 0013 This GDB was configured as "x86_64-pc-linux-gnu". 0014 Type "show configuration" for configuration details. 0015 For bug reporting instructions, please see: 0016 <http://www.gnu.org/software/gdb/bugs/>. 0017 Find the GDB manual and other documentation resources online at: 0018 <http://www.gnu.org/software/gdb/documentation/>. 0019 For help, type "help". 0020 Type "apropos word" to search for commands related to "word"... 0021 Reading symbols from your_application...done. 0022 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">break</span><span style="color:#644a9b;"> main</span> 0023 <span style="color:#898887;"># this is a comment</span> 0024 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">run</span><span style="color:#644a9b;"> <arguments for your application></span> 0025 ... 0026 Breakpoint 1 at 0x400b56: file yourmain.cpp, line 3 0027 3: int main(int argc, char* argv[]) 0028 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">continue</span> 0029 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">backtrace</span> 0030 #0 0x7f59e39bf18d in <span style="color:#644a9b;font-weight:bold;">poll</span> () from<span style="color:#0057ae;"> /usr/lib/libc.so.6</span> 0031 #1 0x7f59df6c8c7c in <span style="color:#644a9b;font-weight:bold;">??</span> () from<span style="color:#0057ae;"> /usr/lib/libglib-2.0.so.0</span> 0032 #2 0x7f59df6c8d8c in <span style="color:#644a9b;font-weight:bold;">g_main_context_iteration</span> () from<span style="color:#0057ae;"> /usr/lib/libglib-2.0.so.0</span> 0033 #3 0x7f59e480b23f in <span style="color:#006e28;">QEventDispatcherGlib::</span><span style="color:#644a9b;font-weight:bold;">processEvents</span>(...) 0034 from<span style="color:#0057ae;"> /usr/lib/libQt5Core.so.5</span> 0035 ... 0036 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">where</span> 0037 #0 <span style="color:#644a9b;font-weight:bold;">main</span> (argc=1, argv=0x7fffffffca88) at<span style="color:#0057ae;"> ../../debugging/ex_debugger/main.cpp</span>:11 0038 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">list</span> 0039 10 bool run = true; 0040 11 while (run) { 0041 12 // infinite loop! can you make it quit? 0042 13 } 0043 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">info</span><span style="color:#644a9b;"> locals</span> 0044 app = <incomplete type> 0045 run = true 0046 complexData = {{d = 0x61d430, e = 0x61d430}} 0047 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">info</span><span style="color:#644a9b;"> scope main.cpp:12</span> 0048 Scope for main.cpp:12: 0049 Symbol argc is a variable at frame base reg $rbp offset 0+-8, length 4. 0050 Symbol argv is a variable at frame base reg $rbp offset 0+-16, length 8. 0051 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">ptype</span><span style="color:#644a9b;"> run</span> 0052 type = bool 0053 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">print</span><span style="color:#644a9b;"> run</span> 0054 run = true 0055 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">set</span><span style="color:#644a9b;"> run = false</span> 0056 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">print</span><span style="color:#644a9b;"> run</span> 0057 run = false 0058 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">print</span><span style="color:#644a9b;"> myString.size()</span> 0059 42 0060 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">ptype</span><span style="color:#644a9b;"> MyType</span> 0061 type = class MyType { 0062 private: 0063 int foo; 0064 public: 0065 int foo() const; 0066 ... 0067 } 0068 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">break</span><span style="color:#644a9b;"> QMessageLogger::warning</span> 0069 Breakpoint 1 at 0x7ffff6f143f0 (8 locations) 0070 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">command</span><span style="color:#644a9b;"> 1</span> 0071 Type commands for breakpoint(s) 1, one per line. 0072 End with a line saying just \"end\". 0073 <span style="color:#644a9b;">> </span><span style="font-weight:bold;">backtrace</span> 0074 <span style="color:#644a9b;">> </span><span style="font-weight:bold;">continue</span> 0075 <span style="color:#644a9b;">> </span><span style="font-weight:bold;">end</span> 0076 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">catch</span><span style="color:#644a9b;"> throw </span><span style="color:#898887;"># or when an exception is thrown</span> 0077 Catchpoint 2 (throw) 0078 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">break</span><span style="color:#644a9b;"> main.cpp:12 </span><span style="color:#898887;"># or when certain code is executed</span> 0079 Breakpoint 3 at 0x401216: file ../../debugging/ex_debugger/main.cpp, line 12. 0080 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">info</span><span style="color:#644a9b;"> breakpoints</span> 0081 Num Type Disp Enb Address What 0082 1 breakpoint keep y <MULTIPLE> 0083 1.1 y 0x7ffff6f143f0 <QMessageLogger::warning(char const*, … 0084 ... 0085 2 breakpoint keep y 0x7ffff66d9b90 exception throw 0086 3 breakpoint keep y 0x000000401216 in main(int, char**) 0087 at debugging/ex_debugger/main.cpp:12 0088 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">condition</span><span style="color:#644a9b;"> 3 argc > 5</span> 0089 <span style="color:#898887;"># ^-- breakpoint id, see `info breakpoints` above</span> 0090 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">call</span><span style="color:#644a9b;"> myFunction()</span> 0091 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">set</span><span style="color:#644a9b;"> pagination off</span> 0092 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">set</span><span style="color:#644a9b;"> logging file /tmp/warnings.log</span> 0093 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">set</span><span style="color:#644a9b;"> logging on</span> 0094 Copying output to /tmp/warnings.log. 0095 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">info</span><span style="color:#644a9b;"> threads</span> 0096 Id Target Id Frame 0097 2 Thread 0x7fffe10e1700 (LWP 7271) \"QXcbEventReader\" 0098 0x7ffff0b6718d in poll () from /usr/lib/libc.so.6 0099 * 1 Thread 0x7ffff7edd840 (LWP 7267) \"kwrite\" 0100 0x7ffff0b6718d in poll () from /usr/lib/libc.so.6 0101 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">thread</span> 0102 <span style="color:#b08000;">[Current thread is 1 (Thread 0x7ffff7edd840 (LWP 7267))]</span> 0103 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">thread</span><span style="color:#644a9b;"> 2</span> 0104 [Switching to thread 2 (Thread 0x7fffe10e1700 (LWP 9765))] 0105 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">thread</span><span style="color:#644a9b;"> apply all backtrace</span> 0106 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">info</span><span style="color:#644a9b;"> sharedlibrary</span> 0107 From To Syms Read Shared Object Library 0108 0x7ffff7ddbb80 0x7ffff7df5610 Yes (*) /lib64/ld-linux-x86-64.so.2 0109 0x7ffff7690460 0x7ffff7ab723c Yes /opt/qt/5.5/gcc_64/lib/libQt5Gui.so.5 0110 0x7ffff6efdb80 0x7ffff71af318 Yes /opt/qt/5.5/gcc_64/lib/libQt5Core.so.5 0111 0x7ffff6c02f60 0x7ffff6c5f852 Yes (*) /usr/lib/libGL.so.1 0112 0x7ffff69d3ac0 0x7ffff69e0931 Yes (*) /usr/lib/libpthread.so.0 0113 0x7ffff66d5fa0 0x7ffff6781d89 Yes /usr/lib/libstdc++.so.6 0114 0x7ffff6353510 0x7ffff63bb33a Yes (*) /usr/lib/libm.so.6 0115 ... 0116 (*): Shared library is missing debugging information. 0117 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">list</span><span style="color:#644a9b;"> 64</span> 0118 59 * If no red can be seen, then the cached implementation is \"good enough\". 0119 60 */ 0120 61 void paintEvent(QPaintEvent *event) 0121 62 { 0122 63 const QRect rect = event->rect(); 0123 64 0124 65 QPainter painter(this); 0125 66 painter.setRenderHint(QPainter::Antialiasing); 0126 67 painter.fillRect(rect, Qt::black); 0127 68 0128 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">dprintf</span><span style="color:#644a9b;"> main.cpp:64,\"paint rect(w=%d,h=%d)\\n\",rect.width(),rect.height()</span> 0129 Dprintf 1 at 0x403a1e: file path/to/main.cpp, line 64. 0130 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">continue</span> 0131 Continuing. 0132 paint rect(w=202,h=200) 0133 paint rect(w=213,h=203) 0134 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">target</span><span style="color:#644a9b;"> remote <device ip>:<port></span> 0135 Remote debugging using <device ip>:<port> 0136 Reading /lib64/ld-linux-x86-64.so.2 from remote target... 0137 warning: File transfers from remote targets can be slow. 0138 Use \"set sysroot\"to access files locally instead. 0139 ... 0140 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">set</span><span style="color:#644a9b;"> sysroot /path/to/sysroot</span> 0141 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">print</span><span style="color:#644a9b;"> myMap</span> 0142 $1 = QMap<QString, int> = { 0143 [\"bar\"] = 1, 0144 [\"foo\"] = 2 0145 } 0146 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">print</span><span style="color:#644a9b;"> money</span> 0147 $1 { 0148 {value = 1.20000005, currency = Money::Euro}, 0149 {value = 3.4000001, currency = Money::Dollar} 0150 } 0151 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">python</span> 0152 <span style="color:#ca60ca;">></span> <span style="color:#ff5500;">import</span> sys 0153 <span style="color:#ca60ca;">></span> sys.path.insert(<span style="color:#b08000;">0</span>, <span style="color:#bf0303;">'/path/to/addon/debugging/ex_gdb_pretty_printer'</span>) 0154 <span style="color:#ca60ca;">></span> <span style="color:#ff5500;">import</span> money_printer 0155 <span style="color:#ca60ca;">></span> <span style="font-weight:bold;">end</span> 0156 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">print</span><span style="color:#644a9b;"> money</span> 0157 $2 = { 0158 \"1.200000 Euro\", 0159 \"3.400000 Dollar\" 0160 } 0161 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">continue</span> 0162 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">detach</span> 0163 <span style="color:#644a9b;">(gdb) </span><span style="font-weight:bold;">quit</span> 0164 </pre></body></html>