Debugging Core Files Using HP WDB (5900-1573; WDB 6.2; January 2011)

The values of the variables in the structure st_two are determined by using

these offsets, as follows:

◦ To examine the first word of the structure st_two, enter the following

command at the gdb prompt:

(gdb) x/x 0x7f7e669c

0x7f7e669c: 0x40001130

To display the string value at this address, enter the following command

at the gdb prompt:

gdb) x/s 0x40001130

0x40001130 <__d_trap_fptr+276>: "of life"

◦ To examine the second word of the structure st_two, enter the following

command at the gdb prompt:

(gdb) x/x 0x7f7e669c+0x4

0x7f7e66a0: 0x00000063

◦ To display the float value at the third word, enter the following command

at the gdb prompt:

(gdb) x/f 0x7f7e669c+0x8

0x7f7e66a4: 19.2099991

◦ To display the char* value at the fourth word, enter the following command

at the gdb prompt:

(gdb) x/x 0x7f7e669c+0xc

0x7f7e66a8: 0x40001138

To display the string value at the displayed address, enter the following

command at the gdb prompt:

(gdb) x/s 0x40001138

0x40001138 <__d_trap_fptr+284>: "is 42"

◦ To display the address of the structure, enter the following command at the

gdb prompt:

(gdb) x/x $sp-0x64

0x7f7e673c: 0x7f7e6688

To display the int value at the start of the structure, enter the following

command at the gdb prompt:

(gdb) x/x 0x7f7e6688

0x7f7e6688: 0x00000011