Hi, here is a problem report for break points on AIX 5.1 and 5.3.
first AIX 5.3: if a program first runs in gdb without any break points and finished, then it's not possible to set break a break point for the next run (this is the same on AIX 5.1 too): # gdb a.out GNU gdb (GDB) 7.1.50.20100222-cvs Reading symbols from a.out...done. (gdb) r Starting program: a.out hello Program exited normally. (gdb) b main ==> Cannot access memory at address 0xf00d7530 (gdb) q with bogus address "0xf00d7530" if there is a(ny) break point set for the 1st run things seem to work fine: # gdb a.out GNU gdb (GDB) 7.1.50.20100222-cvs Reading symbols from a.out...done. (gdb) b main Breakpoint 1 at 0x100003c8: file hello.c, line 23. (gdb) r Starting program: a.out Breakpoint 1, main (argc=1, argv=0x2ff22578, env=0x2ff22580) at hello.c:23 23 main(int argc... (gdb) c Continuing. hello Program exited normally. (gdb) r Starting program: a.out Breakpoint 1, main (argc...=1, argv=0x2ff22578, env=0x2ff22580) at hello.c:23 23 main(int argc, ... (gdb) c Continuing. hello Program exited normally. (gdb) b main Note: breakpoint 1 also set at pc 0x100003c8. Breakpoint 2 at 0x100003c8: file hello.c, line 23. (gdb) r Starting program: a.out Breakpoint 1, main (argc=1, argv=0x2ff22578, env=0x2ff22580) at hello.c:23 23 main(int argc, ... (gdb) c Continuing. hello Program exited normally. (gdb) =============================================================================== on AIX 5.1 though setting a break point before the first run only seems to work, but that break point is not functional for the 1st run: Reading symbols from a.out...done. (gdb) b main Breakpoint 1 at 0x100003c8: file hello.c, line 23. (gdb) i b Num Type Disp Enb Address What 1 breakpoint keep y 0x100003c8 in main at hello.c:23 (gdb) r Starting program: a.out ==> Error in re-setting breakpoint 1: Cannot access memory at address 0x0 ==> Error in re-setting breakpoint 1: Cannot access memory at address 0x0 hello Program exited normally. (gdb) i b Num Type Disp Enb Address What 1 breakpoint keep y 0x100003c8 in main at hello.c:23 and that break point doesn't function either in a 2nd run: (gdb) r Starting program: a.out hello Program exited normally. but if I add another bp to main (or another function) gdb starts to work "better";) (gdb) i b Num Type Disp Enb Address What 1 breakpoint keep n 0x100003c8 in main at hello.c:23 (gdb) b main Note: breakpoint 1 (disabled) also set at pc 0x100003c8. Breakpoint 2 at 0x100003c8: file hello.c, line 23. (gdb) r Starting program: a.out Breakpoint 2, main (argc=1, argv=0x2ff2248c, env=0x2ff22494) at hello.c:23 23 main(int argc,... (gdb) i b Num Type Disp Enb Address What 1 breakpoint keep n 0x100003c8 in main at hello.c:23 2 breakpoint keep y 0x100003c8 in main at hello.c:23 breakpoint already hit 1 time (gdb) c Continuing. hello Program exited normally. (gdb) r Starting program: a.out Breakpoint 2, main (argc=1, argv=0x2ff2248c, env=0x2ff22494) at hello.c:23 23 main(int argc,... (gdb) c Continuing. hello Program exited normally. (gdb) any thoughts about that breakpoint weirdnes son AIX ?!? right now I'm trying to build gdb on AIX 6.1 which right now fails here "gdb-CVS-20100222/gdb/aix-thread.c", line 352.46: 1506-280 (W) Function argument assignment between types "int*" and "unsigned int*" is not allowed. where the source reads like this -- hmmmmm.... /* getthrds(3) isn't prototyped in any AIX 4.3.3 #include file. */ extern int getthrds (pid_t, struct thrdsinfo64 *, int, pthdb_tid_t *, int); but now I have to leave for today -- stay tuned ;-)) Harald Koenig -- "I hope to die ___ _____ before I *have* to use Microsoft Word.", 0--,| /OOOOOOO\ Donald E. Knuth, 02-Oct-2001 in Tuebingen. <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig \/\/\/\/\/\/\/\/\/ science+computing ag // / \\ \ koe...@science-computing.de ^^^^^ ^^^^^ -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Michel Lepert Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196 _______________________________________________ bug-gdb mailing list bug-gdb@gnu.org http://lists.gnu.org/mailman/listinfo/bug-gdb