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.

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 show 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;

24 };

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)

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)

}

...

}