skype5_gdb
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skype5_gdb [2011/02/21 08:11] ben created |
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| - | For some reason the Skype 5 for the Mac release has a minimum window height and width. It's very clearly un-liked by the masses, including myself. I have no idea of the legality or license breach or whatnot of running Skype in a debugger, but since there's no decompilation necessary to do this, I can't see the harm. | ||
| - | |||
| - | **This is a very manual process.** The window minimum height annoys me to such a degree that I'm willing to do this every time I start Skype (not very frequently though I use it every day). | ||
| - | |||
| - | Major Caveats: | ||
| - | - Skype 5 is not designed to be run this way, so the GUI suffers with smaller windows sizes. | ||
| - | - The process is manual and needs to be run every time you use Skype, I haven't bothered to try to automate it though I'm sure one can | ||
| - | - The gdb debugger must already be installed on your mac (google it) | ||
| - | |||
| - | |||
| - | To run Skype 5 without the minimum window size, the steps are: | ||
| - | - Open Terminal | ||
| - | - enter: gdb /Applications/Skype.app/Contents/MacOS/Skype | ||
| - | - wait for the "(gdb)" prompt | ||
| - | - enter: b -[NSWindow setMinSize:] and answer "y" to any questions | ||
| - | - enter: b -[NSWindow setContentMinSize:] and answer "y" to any questions | ||
| - | - enter: r | ||
| - | - when greeted with "Breakpoint 1, 0x90a34f6d in -[NSWindow setMinSize:] ()", enter: ret | ||
| - | - when greeted with "Make selected stack frame return now? (y or n)" enter: y | ||
| - | - enter: c | ||
| - | - when greeted with "Breakpoint 2, 0x90990fda in -[NSWindow setContentMinSize:] ()" enter: ret | ||
| - | - when greeted with "Make selected stack frame return now? (y or n)" enter: y | ||
| - | - enter: c | ||
| - | - when greeted with "Breakpoint 1, 0x90a34f6d in -[NSWindow setMinSize:] ()", enter: ret | ||
| - | - when greeted with "Make selected stack frame return now? (y or n)" enter: y | ||
| - | - enter: c | ||
| - | - **Enjoy Skype 5 with a completely resizable window** | ||
| - | |||
| - | Below are my original notes, they are not complete, readable, or coherent: | ||
| - | <code> | ||
| - | NOTES: | ||
| - | |||
| - | |||
| - | r = run | ||
| - | bt = backtrace /show the stack | ||
| - | info functions setContentMinSize - gets address for the set window size function, or other... | ||
| - | info functions set.*Size - get all functions that have set ... Size | ||
| - | info functions NS.*set.*MinSize | ||
| - | info frame - information about current frame in stack | ||
| - | |||
| - | b *0x90990fc8 - set a breakpoint at a function address (from info functions) | ||
| - | x/10i 0x90990fc8 - show next 10 instructions NOTE no * in the address... | ||
| - | x/10i - show next ten instructions | ||
| - | si (step single instruction including function calls) | ||
| - | ni (step single instruction don't include function calls) | ||
| - | return (return immediately from function) | ||
| - | |||
| - | Action: | ||
| - | |||
| - | Find all functions that set the MinSize: info functions NSW.*set.*MinSize | ||
| - | |||
| - | (gdb) info functions NSW.*set.*MinSize | ||
| - | All functions matching regular expression "NSW.*set.*MinSize": | ||
| - | |||
| - | Non-debugging symbols: | ||
| - | 0x90990fc8 -[NSWindow setContentMinSize:] | ||
| - | 0x90a34f5b -[NSWindow setMinSize:] | ||
| - | 0x90f3ac9b -[NSWindowTemplate setMinSize:] | ||
| - | 0x90f3ad8e -[NSWindowTemplate setContentMinSize:] | ||
| - | |||
| - | Set a break for each of those: | ||
| - | b *0x90990fc8 | ||
| - | b *0x90a34f5b | ||
| - | b *0x90f3ac9b | ||
| - | b *0x90f3ad8e | ||
| - | |||
| - | maybe write a "ret" at 0x90a34f5b? if only I could find this call in the actual disassembled code (i can't). | ||
| - | |||
| - | There are two calls for setMinSize and one for setContentMinSize. Apparently all three need to be skipped. Break on the addresses, and type "ret" to skip their work. | ||
| - | |||
| - | To find out what is calling them, break on the calling function address after checking with 'bt'. | ||
| - | |||
| - | (gdb) bt 2 | ||
| - | #0 0x90a34f5b in -[NSWindow setMinSize:] () | ||
| - | #1 0x9092facd in -[NSWindowTemplate nibInstantiate] () | ||
| - | (More stack frames follow...) | ||
| - | |||
| - | (gdb) b *0x9092facd | ||
| - | Breakpoint 14 at 0x9092facd | ||
| - | (gdb) | ||
| - | |||
| - | sudo port install binutils (which gets us objdump) | ||
| - | |||
| - | Breakpoint 2, 0x90a34f5b in -[NSWindow setMinSize:] () | ||
| - | (gdb) ret | ||
| - | Make selected stack frame return now? (y or n) y | ||
| - | #0 0x9092facd in -[NSWindowTemplate nibInstantiate] () | ||
| - | (gdb) c | ||
| - | Continuing. | ||
| - | |||
| - | Breakpoint 1, 0x90990fc8 in -[NSWindow setContentMinSize:] () | ||
| - | (gdb) ret | ||
| - | Make selected stack frame return now? (y or n) y | ||
| - | #0 0x9092fcac in -[NSWindowTemplate nibInstantiate] () | ||
| - | (gdb) c | ||
| - | Continuing. | ||
| - | |||
| - | Breakpoint 2, 0x90a34f5b in -[NSWindow setMinSize:] () | ||
| - | (gdb) ret | ||
| - | Make selected stack frame return now? (y or n) y | ||
| - | #0 0x00160c78 in ?? () | ||
| - | (gdb) c | ||
| - | Continuing. | ||
| - | |||
| - | </code> | ||
skype5_gdb.1298293911.txt.gz ยท Last modified: 2011/02/21 08:11 by ben
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