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with Brian's kernel support for i386 debug registers. This makes watchpoints actually usable for real-life problems. Note: you can only set watchpoints on 1-, 2- or 4-byte locations, gdb automatically falls back to [sloooow] software watchpoints when attempting to use them on variables which don't fit into this category. To circumvent this, one can use the following hack: watch *(int *)0x<some address> David O'Brien is IMHO considering to get this fully integrated into the official GDB, but as long as we've got the i386/* files sitting around in our private FreeBSD tree here, the feature can now be tested more extensively, so i'm committing this for the time being. This work has been done in order to debug a tix toolkit problem, thus it has been sponsored by teh Deutsche Post AG. Reviewed by: bsd (not the operating system, but Brian :-) |
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