dwhat
Determines what a name refers to
Format
dwhat symbol-name
Arguments
symbol-name
Fully or partially qualified name specifying a variable, procedure, or other source code symbol.
Description
The dwhat command displays information about a symbol. For a variable name, dwhat displays the type, location, storage class, and other relevant information for each variable of that name in the scope of the current focus. For a type name, dwhat displays general information about the data type.
NOTE: To view information on CLI variables or aliases, use the
dset or
alias commands.
The focus constrains the query to a particular context.
The default width for this command is thread (t).
Command alias
Alias | Definition | Description |
|---|
wh | dwhat | Determines what a name refers to |
Examples
The following examples the CLI display for various commands.
dprint timeout
timeout = {
tv_sec = 0xc0089540 (-1073179328)
tv_usec = 0x000003ff (1023)
}
dwhat timeout
In thread 1.1:
Name: timeout; Type: struct timeval; Size: 8 bytes; Addr: 0x11fffefc0
Scope: #fork_loop.cxx#snore \
(Scope class: Any) Address class: auto_var \
(Local variable)
wh timeval
In process 1: Type name: struct timeval; Size: 8 bytes; \
Category: Structure
Fields in type:
{ tv_sectime_t(32 bits)
tv_usecint(32 bits)
}
dlist
20 float field3_float;
21 double field3_double;
22 en_check en1;
23
24 };
25
26 main ()
27 {
28 en_check vbl;
29 check_struct s_vbl;
30 vbl = big;
31 s_vbl.field2_char = 3;
32 return (vbl + s_vbl.field2_char);
33 }
p vbl
vbl = big (0)
wh vbl
In thread 2.3:
Name: vbl; Type: enum en_check; \
Size: 4 bytes; Addr: Register 01
Scope: #check_structs.cxx#main \
(Scope class: Any)
Address class: register_var (Register \
variable)
wh en_check
In process 2:
Type name: enum en_check; Size: 4 bytes; \
Category: Enumeration
Enumerated values:
big = 0
little = 1
fat = 2
thin = 3
p s_vbl
s_vbl = { field1_int = 0x800164dc (-2147392292) field2_char = '\377'
(0xff, or -1) field2_chars = "\003" <padding> = '\000' (0x00, or 0)
field3_int = 0xc0006140 (-1073716928) field2_uchar = '\377' (0xff, or 255)
<padding> = '\003' (0x03, or 3) <padding> = '\000' (0x00, or 0)
<padding> = '\000' (0x00, or 0)
field_sub = {
field1_int = 0xc0002980 (-1073731200)
<padding> = '\377' (0xff, or -1)
<padding> = '\003' (0x03, or 3)
<padding> = '\000' (0x00, or 0)
<padding> = '\000' (0x00, or 0)
field2_long = 0x0000000000000000 (0)
...
}
wh s_vbl
In thread 2.3
Name: s_vbl; Type: struct check_struct; \
Size: 80 bytes; Addr: 0x11ffff240
Scope: #check_structs.cxx#main \
Scope class: Any)
Address class: auto_var (Local variable)
wh check_struct
In process 2:
Type name: struct check_struct; \
Size: 80 bytes; Category: Structure
Fields in type:
{
field1_intint(32 bits)
field2_charchar(8 bits)
field2_chars$string[2](16 bits)
<padding>$char(8 bits)
field3_intint(32 bits)
field2_uchar unsigned char(8 bits)
<padding>$char[3](24 bits)
field_substruct sub_st(320 bits){
field1_intint(32 bits)
<padding>$char[4](32 bits)
field2_longlong(64 bits)
field2_ulongunsigned long(64 bits)
field3_uintunsigned int(32 bits)
en1enum en_check (32 bits)
field3_doubledouble(64 bits)
}
...
}
Related Topics
