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Re: How GDB knows a breakpoint is hit?


Thanks very much.

Mao

On Aug 19, 2009, at 5:09 PM, Andreas Schwab wrote:

kceiwH <kceiwh@gmail.com> writes:

I wonder how GDB knows it should stop the inferior when a breakpoint is
hit. I try to read the code but only to find how GDB creates a
breakpoint. I thought GDB might change some instructions of inferior so
that when the inferior executes the modified instructions, GDB should
know. But what the function "create_breakpoint" does is to add a
breakpoint to the list "breakpoint_chain".

Breakpoints are only inserted immediately before the inferior is resumed, see insert_breakpoints.

Andreas.

--
Andreas Schwab, schwab@linux-m68k.org
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