Re: x86 inline assembler to stop in debugger
Re: x86 inline assembler to stop in debugger
- Subject: Re: x86 inline assembler to stop in debugger
- From: Dave McCaldon <email@hidden>
- Date: Mon, 30 Jan 2006 09:50:18 -0500
Thanks, however on PPC, it seems that the inline assembler I found doesn't actually do what I want. When running under Xcode, it seems to cause an EXC_SOFTWARE, which Xcode seems to treat as fatal.
Is there any way to make my DebugBreak() macro cause Xcode to stop in the debugger as if a breakpoint was set?
Thanks.
On Jan 29, 2006, at 5:23 PM, Eric Albert wrote: On Jan 29, 2006, at 10:19 AM, Dave McCaldon wrote:
Technical Q&A QA1361 shows how to detect if you are running under the debugger, somewhere I found a snippet of inline assembler that uses this to trap into the debugger (useful for ASSERTs etc).
#define DebugBreak() __asm__ volatile ("twnei %0,0" : : "r" (AmIBeingDebugged()))
Can anyone confirm what the x86 version of this is? I'm guessing something along the lines of:
#define DebugBreak() if (AmIBeingDebugged()) { __asm__ volatile ("int 3"); }
It's more common to use "int3" as the instruction rather than "int $3", but either will work.
Hope this helps, Eric
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