Tutorial for gdb debug under Win32 - Revision history

DoesItReallyMatter: See also: Debug

2019-03-19T09:02:56Z

DoesItReallyMatter: +:Category:Windows

2019-02-15T20:30:39Z

← Older revision		Revision as of 20:30, 15 February 2019
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	[[File:Vlc_gdb_quit.png‎‎‎‎‎]]		[[File:Vlc_gdb_quit.png‎‎‎‎‎]]

	[[Category:Building]][[Category:Coding]]		[[Category:Building]]
			[[Category:Coding]]
			[[Category:Windows]]

Courmisch at 13:02, 29 July 2017

2017-07-29T13:02:17Z

← Older revision		Revision as of 13:02, 29 July 2017
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	~~= Editing Tutorial for gdb debug under Win32 =~~
	The point of this page is to show you how to get VLC related crash info with a tool called '''gdb'''.		The point of this page is to show you how to get VLC related crash info with a tool called '''gdb'''.

Edwardw at 14:08, 1 August 2014

2014-08-01T14:08:37Z

← Older revision		Revision as of 14:08, 1 August 2014
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	= Editing Tutorial for gdb debug under Win32 =		= Editing Tutorial for gdb debug under Win32 =
	~~Point~~ of this page is to show how to get VLC related crash info with tool called '''gdb'''. This crash info is '''VERY''' useful when tracking down the reason for the crash, so if you can provide us this info, the ~~likehood for~~ bug ~~fix~~ is much higher.		The point of this page is to show you how to get VLC related crash info with a tool called '''gdb'''.

			This crash info is '''VERY''' useful when tracking down the reason for the crash, so if you can provide us with this info, the likelihood of getting your bug fixed is much higher.

	== What you need ==		== What you need ==
	* ~~Computer that runs~~ Windows ~~builds of~~ VLC (this tutorial isn't for 64 bit VLC builds, but it will work for 64 bit Windows versions that run 32 bit VLC).		* Windows computer
	* ~~Way~~ to crash ~~your~~ VLC (freezes aren't useful unfortunately)		* 32-bit VLC build (this tutorial isn't for 64-bit VLC builds, but it will work for 64-bit Windows versions that run 32-bit VLC).
			* A way to crash VLC (freezes aren't useful unfortunately)

	== What you have to do ==		== What you have to do ==

J-b at 15:15, 1 October 2013

2013-10-01T15:15:54Z

← Older revision		Revision as of 15:15, 1 October 2013
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	[[File:Vlc_gdb_quit.png‎‎‎‎‎]]		[[File:Vlc_gdb_quit.png‎‎‎‎‎]]

	[[Category:Building]][[Category:~~Code~~]]		[[Category:Building]][[Category:Coding]]

J-b at 15:14, 1 October 2013

2013-10-01T15:14:54Z

← Older revision		Revision as of 15:14, 1 October 2013
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	[[File:Vlc_gdb_quit.png‎‎‎‎‎]]		[[File:Vlc_gdb_quit.png‎‎‎‎‎]]

			[[Category:Building]][[Category:Code]]

VLC help at 12:48, 22 January 2012

2012-01-22T12:48:41Z

← Older revision		Revision as of 12:48, 22 January 2012
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	*Tool called 7-Zip can be used to extract .7z packages		*Tool called 7-Zip can be used to extract .7z packages
	*Folder doesn't really matter. So you '''don't''' have to uninstall your current VLC version.		*Folder doesn't really matter. So you '''don't''' have to uninstall your current VLC version. And you can have multiple VLC versions in your computer.

	[[File:Vlc_gdb_nofolder.png‎‎]]		[[File:Vlc_gdb_nofolder.png‎‎]]
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	*Some issues might be already fixed, so it might not be possible to replicate the crash		*Some issues might be already fixed, so it might not be possible to replicate the crash

	4. If you can replicate the issue, next step is to download gdb debugger from ~~http~~://~~sourceforge~~.~~net~~/~~projects/mingw~~/~~files/OldFiles~~/gdb-6.~~8-mingw.tar.bz2/download~~		4. If you can replicate the issue, next step is to download gdb debugger from ftp://ftp.equation.com/gdb/32/gdb.exe

	5. ~~Extract~~ the gdb.exe ~~from that package~~ to the same directory where you extracted the VLC debug build		5. Copy the gdb.exe to the same directory where you extracted the VLC debug build

	*Tool called 7-Zip can be used to extract .tar.bz2 packages (actually that is compressed twice, once with bz2 and once with tar)

	[[File:Vlc_gdb_folder.png‎‎]]		[[File:Vlc_gdb_folder.png‎‎]]
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	[[File:Vlc_gdb_target_exec.png‎‎‎‎]]		[[File:Vlc_gdb_target_exec.png‎‎‎‎]]

	8. Type in ''run'' and VLC should start		8. Type in ''run'' and VLC should start after few moments

	*first vlc.exe startup might take some time, so please wait		*first vlc.exe startup might take some time, so please wait
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	[[File:Vlc_gdb_signal.png‎]]		[[File:Vlc_gdb_signal.png‎]]

	10. Once vlc.exe has crashed, type in ''bt''		10. Once vlc.exe has crashed, type in ''bt'' to the gdb console

	*bt is short for backtrace		*bt is short for backtrace

VLC help: /* What you have to do */

2012-01-15T15:59:09Z

What you have to do

← Older revision		Revision as of 15:59, 15 January 2012
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	*you can answer ''y'' to the question		*you can answer ''y'' to the question

			[[File:Vlc_gdb_quit.png‎‎‎‎‎]]

VLC help: /* What you have to do */

2012-01-15T15:44:04Z

What you have to do

← Older revision		Revision as of 15:44, 15 January 2012
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	[[File:Vlc_gdb_bt.png‎‎‎]]		[[File:Vlc_gdb_bt.png‎‎‎]]

	11. Share us the info that bt command gave		11. Share us the info that bt command gave

	*right click the gdb window and select Edit -> Mark to mark the text you want to copy, and then left click to select area, then right click to copy it to clipboard		*right click the gdb window and select Edit -> Mark to mark the text you want to copy, and then left click to select area, then right click to copy it to clipboard
			*you can share us info via trac, via IRC, via forums etc.

			[[File:Vlc_gdb_marked.png‎‎‎‎]]

	12. You can close the gdb by typing ''quit''		12. You can close the gdb by typing ''quit''

	*you can answer ''y'' to the question		*you can answer ''y'' to the question

VLC help: /* What you have to do */

2012-01-15T15:34:18Z

What you have to do

← Older revision		Revision as of 15:34, 15 January 2012
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	*Tool called 7-Zip can be used to extract .7z packages		*Tool called 7-Zip can be used to extract .7z packages
	*Folder doesn't really matter. So you '''don't''' have to uninstall your current VLC version.		*Folder doesn't really matter. So you '''don't''' have to uninstall your current VLC version.

			[[File:Vlc_gdb_nofolder.png‎‎]]

	3. Run vlc.exe from that folder and see if you can replicate the issue that is causing your current VLC to crash.		3. Run vlc.exe from that folder and see if you can replicate the issue that is causing your current VLC to crash.
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	*certain crashes might not happen when vlc.exe is run via gdb.exe, so crash might not happen		*certain crashes might not happen when vlc.exe is run via gdb.exe, so crash might not happen
			*crashes can be noticed from gdb console, which shows "Program received signal..." message

			[[File:Vlc_gdb_signal.png‎]]

	10. Once vlc.exe has crashed, type in ''bt''		10. Once vlc.exe has crashed, type in ''bt''

	*crashes can be noticed from gdb console, which shows "Program received signal..." message
	*bt is short for backtrace		*bt is short for backtrace

← Older revision		Revision as of 09:02, 19 March 2019
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			{{See also\|Debug}}
	The point of this page is to show you how to get VLC related crash info with a tool called '''gdb'''.		The point of this page is to show you how to get VLC related crash info with a tool called '''gdb'''.