Attachment 2694 Details for Bug 3289 – gdb Debugging session

gdb Debugging session

y (text/plain), 5.81 KB, created by Bernhard Reiter on 2005-05-17 13:01:56 UTC

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Creator: Bernhard Reiter

Created: 2005-05-17 13:01:56 UTC

Size: 5.81 KB

patch

obsolete

>break CreateColormap
>
>Breakpoint 2 at 0x100a9d40: file colormap.c, line 265.
>(gdb) cont
>Continuing.
>
>Breakpoint 2, CreateColormap (mid=4194305, pScreen=0x10327d30,
>    pVisual=0x1035d8a8, ppcmap=0x7ff417dc, alloc=0, client=2) at colormap.c:265
>265         class = pVisual->class;
>(gdb) bt
>#0  CreateColormap (mid=4194305, pScreen=0x10327d30, pVisual=0x1035d8a8,
>    ppcmap=0x7ff417dc, alloc=0, client=2) at colormap.c:265
>#1  0x100c0900 in ProcCreateColormap (client=0x105c6a18) at dispatch.c:2419
>#2  0x100b8a34 in Dispatch () at dispatch.c:449
>#3  0x100db818 in main (argc=2, argv=0x7ff41d04, envp=0x7ff41d10) at main.c:445
>
>
>(gdb) s
>/build/buildd/gdb-6.3/gdb/infrun.c:2642: internal-error: insert_step_resume_breakpoint_at_sal: Assertion `step_resume_breakpoint == NULL' failed.
>A problem internal to GDB has been detected,
>further debugging may prove unreliable.
>Quit this debugging session? (y or n) n
>
>/build/buildd/gdb-6.3/gdb/infrun.c:2642: internal-error: insert_step_resume_breakpoint_at_sal: Assertion `step_resume_breakpoint == NULL' failed.
>A problem internal to GDB has been detected,
>further debugging may prove unreliable.
>Create a core file of GDB? (y or n) n
>
>
>(gdb) s
>SmartScheduleTimer (sig=14) at utils.c:1587
>1587        int olderrno = errno;
>(gdb) bt
>#0  SmartScheduleTimer (sig=14) at utils.c:1587
>#1  <signal handler called>
>Cannot access memory at address 0x704
>
>(gdb) n
>1587        int olderrno = errno;
>(gdb) n
>1589        SmartScheduleTime += SmartScheduleInterval;
>(gdb) n
>1590        if (SmartScheduleIdle)
>(gdb) n
>1594        errno = olderrno;
>(gdb) n
>1595    }
>
>
>
>(gdb) n 500
>1589        SmartScheduleTime += SmartScheduleInterval;
>(gdb) cont
>Continuing.
>
>Breakpoint 2, CreateColormap (mid=4194305, pScreen=0x10327d30,
>    pVisual=0x1035d8a8, ppcmap=0x7ff417dc, alloc=0, client=2) at colormap.c:265
>265         class = pVisual->class;
>(gdb) list
>260         ColormapPtr pmap;
>261         register    EntryPtr        pent;
>262         int         i;
>263         register    Pixel   *ppix, **pptr;
>264
>265         class = pVisual->class;
>266         if(!(class & DynamicClass) && (alloc != AllocNone) && (client != SERVER_ID))
>267             return (BadMatch);
>268
>269         size = pVisual->ColormapEntries;
>(gdb) s
>266         if(!(class & DynamicClass) && (alloc != AllocNone) && (client != SERVER_ID))
>(gdb) print class
>$1 = 4
>(gdb) print pVisual
>$2 = 0x1035d8a8
>(gdb) print pVisual->ColormapEntries
>$3 = 256
>(gdb) s
>269         size = pVisual->ColormapEntries;
>(gdb) s
>270         sizebytes = (size * sizeof(Entry)) +
>(gdb) s
>273         if ((class | DynamicClass) == DirectColor)
>(gdb) print sizebytes
>$4 = 7168
>(gdb) s
>274             sizebytes *= 3;
>(gdb) list
>269         size = pVisual->ColormapEntries;
>270         sizebytes = (size * sizeof(Entry)) +
>271                     (MAXCLIENTS * sizeof(Pixel *)) +
>272                     (MAXCLIENTS * sizeof(int));
>273         if ((class | DynamicClass) == DirectColor)
>274             sizebytes *= 3;
>275         sizebytes += sizeof(ColormapRec);
>276         pmap = (ColormapPtr) xalloc(sizebytes);
>277         if (!pmap)
>278             return (BadAlloc);
>(gdb) s
>275         sizebytes += sizeof(ColormapRec);
>(gdb) print sizebytes
>$5 = 21504
>(gdb) s
>276         pmap = (ColormapPtr) xalloc(sizebytes);
>(gdb) print sizebytes
>$6 = 21580
>(gdb) s
>Xalloc (amount=21580) at utils.c:1361
>1361        if ((long)amount <= 0) {
>(gdb) print pmap
>No symbol "pmap" in current context.
>(gdb) n
>1365        amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
>(gdb) n
>1371        if ((ptr = (pointer)malloc(amount))) {
>(gdb) n
>1372            return (unsigned long *)ptr;
>(gdb) n
>1377    }
>(gdb) n
>CreateColormap (mid=4194305, pScreen=0x10327d30, pVisual=0x1035d8a8,
>    ppcmap=0x7ff417dc, alloc=0, client=2) at colormap.c:277
>277         if (!pmap)
>(gdb) print pmap
>$7 = 0x105c9170
>(gdb) n
>279         pmap->red = (EntryPtr)((char *)pmap + sizeof(ColormapRec));
>(gdb) n
>280         sizebytes = size * sizeof(Entry);
>(gdb) n
>281         pmap->clientPixelsRed = (Pixel **)((char *)pmap->red + sizebytes);
>(gdb) n
>282         pmap->numPixelsRed = (int *)((char *)pmap->clientPixelsRed +
>(gdb) n
>284         pmap->mid = mid;
>(gdb) n
>285         pmap->flags = 0;    /* start out with all flags clear */
>(gdb) n
>286         if(mid == pScreen->defColormap)
>(gdb) n
>288         pmap->pScreen = pScreen;
>(gdb) n
>289         pmap->pVisual = pVisual;
>(gdb) n
>290         pmap->class = class;
>(gdb) n
>291         if ((class | DynamicClass) == DirectColor)
>(gdb) n
>292             size = NUMRED(pVisual);
>(gdb) n
>293         pmap->freeRed = size;
>(gdb) n
>294         bzero ((char *) pmap->red, (int)sizebytes);
>(gdb) n
>295         bzero((char *) pmap->numPixelsRed, MAXCLIENTS * sizeof(int));
>(gdb) n
>/build/buildd/gdb-6.3/gdb/infrun.c:2642: internal-error: insert_step_resume_breakpoint_at_sal: Assertion `step_resume_breakpoint == NULL' failed.
>A problem internal to GDB has been detected,
>further debugging may prove unreliable.
>Quit this debugging session? (y or n) n
>
>/build/buildd/gdb-6.3/gdb/infrun.c:2642: internal-error: insert_step_resume_breakpoint_at_sal: Assertion `step_resume_breakpoint == NULL' failed.
>A problem internal to GDB has been detected,
>further debugging may prove unreliable.
>Create a core file of GDB? (y or n) n
>(gdb) n
>SmartScheduleTimer (sig=14) at utils.c:1587
>1587        int olderrno = errno;
>(gdb) cont
>Continuing.
>
>Program received signal SIGSEGV, Segmentation fault.
>0x0fe036d0 in mallopt () from /lib/libc.so.6
>(gdb) bt
>#0  0x0fe036d0 in mallopt () from /lib/libc.so.6
>#1  0x0fed1a1c in ?? () from /lib/libc.so.6
>#2  0x0fed1a1c in ?? () from /lib/libc.so.6
>Previous frame identical to this frame (corrupt stack?)
>(gdb) cont
>Continuing.
>
>Program received signal SIGABRT, Aborted.
>0x0fdbac40 in kill () from /lib/libc.so.6
>(gdb) cont
>Continuing.
>
>Program terminated with signal SIGABRT, Aborted.
>The program no longer exists.
>(gdb) q
>
>

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