Debugging TV Frame 0x0A
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The document discusses memory dump analysis, particularly on macOS, detailing exceptions and debugging techniques using tools like GDB. It provides a code example demonstrating a segmentation fault and outlines upcoming training sessions for advanced dump analysis. The content is targeted at professionals interested in debugging and memory analysis.
![void bar()
{
int *p = NULL;
*p = 1;
}
void foo()
{
bar();
}
int main(int argc, const char * argv[])
{
foo();
return 0;
}
Exception Thread
© 2012 DumpAnalysis.org + TraceAnalysis.org](https://image.slidesharecdn.com/debuggingtvframe0x0a-171020153107/85/Debugging-TV-Frame-0x0A-3-320.jpg)
![Dmitrys-MacBook-Air:/ DumpAnalysis$ ulimit -c unlimited
Dmitrys-MacBook-Air:/ DumpAnalysis$ ulimit –a
core file size (blocks, -c) unlimited
[…]
Dmitrys-MacBook-Air:/ DumpAnalysis$
/Users/DumpAnalysis/Library/Developer/Xcode/DerivedData/Test-
adsepuwnmyotiyfiajcuyqrwjzmy/Build/Products/Debug/Test
Segmentation fault: 11 (core dumped)
Dmitrys-MacBook-Air:/ DumpAnalysis$ ls /cores
core.5494
Dmitrys-MacBook-Air:/ DumpAnalysis$
/Applications/Xcode.app/Contents/Developer/usr/bin/gdb
/Users/DumpAnalysis/Library/Developer/Xcode/DerivedData/Test-
adsepuwnmyotiyfiajcuyqrwjzmy/Build/Products/Debug/Test /cores/core.5494
Terminal and GDB
© 2012 DumpAnalysis.org + TraceAnalysis.org](https://image.slidesharecdn.com/debuggingtvframe0x0a-171020153107/85/Debugging-TV-Frame-0x0A-5-320.jpg)
Debugging TV Frame 0x0A
- 1. Frame 0x0A Presenter: Dmitry Vostokov Sponsors Debugging.TV
- 2. • Platform independent memory dump analysis • Platform independent MDA patterns • Exception Thread pattern (on Mac OS X) • WER vs. MER and WinDbg vs. GDB Topics © 2012 DumpAnalysis.org + TraceAnalysis.org
- 3. void bar() { int *p = NULL; *p = 1; } void foo() { bar(); } int main(int argc, const char * argv[]) { foo(); return 0; } Exception Thread © 2012 DumpAnalysis.org + TraceAnalysis.org
- 4. Xcode © 2012 DumpAnalysis.org + TraceAnalysis.org
- 5. Dmitrys-MacBook-Air:/ DumpAnalysis$ ulimit -c unlimited Dmitrys-MacBook-Air:/ DumpAnalysis$ ulimit –a core file size (blocks, -c) unlimited […] Dmitrys-MacBook-Air:/ DumpAnalysis$ /Users/DumpAnalysis/Library/Developer/Xcode/DerivedData/Test- adsepuwnmyotiyfiajcuyqrwjzmy/Build/Products/Debug/Test Segmentation fault: 11 (core dumped) Dmitrys-MacBook-Air:/ DumpAnalysis$ ls /cores core.5494 Dmitrys-MacBook-Air:/ DumpAnalysis$ /Applications/Xcode.app/Contents/Developer/usr/bin/gdb /Users/DumpAnalysis/Library/Developer/Xcode/DerivedData/Test- adsepuwnmyotiyfiajcuyqrwjzmy/Build/Products/Debug/Test /cores/core.5494 Terminal and GDB © 2012 DumpAnalysis.org + TraceAnalysis.org
- 6. Debugger Output © 2012 DumpAnalysis.org + TraceAnalysis.org GNU gdb 6.3.50-20050815 (Apple version gdb-1752) (Sat Jan 28 03:02:46 UTC 2012) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "x86_64-apple-darwin"... Reading symbols for shared libraries .. done Reading symbols for shared libraries . done Reading symbols for shared libraries .......................... done #0 0x000000010eb07eb0 in bar () at /Users/DumpAnalysis/Documents/MacOSX-Debugging/Test/Test/Test/main.c:15 15 *p = 1; (gdb) where #0 0x000000010eb07eb0 in bar () at /Users/DumpAnalysis/Documents/MacOSX-Debugging/Test/Test/Test/main.c:15 #1 0x000000010eb07ec9 in foo () at /Users/DumpAnalysis/Documents/MacOSX-Debugging/Test/Test/Test/main.c:20 #2 0x000000010eb07eeb in main (argc=1, argv=0x7fff6e706ad0) at /Users/DumpAnalysis/Documents/MacOSX-Debugging/Test/Test/Test/main.c:25 Current language: auto; currently minimal (gdb) q
- 7. !Ad Hardcore Technical Support Training © 2012 DumpAnalysis.org + TraceAnalysis.org Advanced Windows Memory Dump Analysis Accelerated Windows Memory Dump AnalysisApril 11-16, 2012: April 20-23, 2012: Training Schedule Accelerated Software Trace AnalysisApril 27-30, 2012: Accelerated Mac OS X Core Dump Analysis Forthcoming: Linux Core Dump Analysis Introduction to Software Narratology (free)April 2, 2012: Deep Down C++
- 8. Debugging.TV