Crash Functions and MDB Dcmds

? 

::dcmds 

List available functions. 

!command 

!command 

Escape to the shell and execute command. 

base 

= 

In mdb, the = format character can be used to convert the left-hand expression value to any of the known formats. Formats for octal, decimal, and hexadecimal are provided. 

callout 

::callout 

Print the callout table. 

class 

::class 

Print scheduling classes. 

cpu 

::cpuinfo 

Print information about the threads dispatched on the system CPUs. If the contents of a particular CPU structure are needed, the user should apply the $<cpu macro to the CPU address in mdb.

help 

::help 

Print a description of the named dcmd, or general help information. 

kfp 

::regs 

The mdb ::regs dcmd displays the complete kernel register set, including the current stack frame pointer. The $C dcmd can be used to display a stack backtrace including frame pointers. 

kmalog 

::kmalog 

Display events in kernel memory allocator transaction log. 

kmastat 

::kmastat 

Print kernel memory allocator transaction log. 

kmausers 

::kmausers 

Print information about the medium and large users of the kernel memory allocator that have current memory allocations. 

mount 

::fsinfo 

Print information about mounted file systems. 

nm 

::nm 

Print symbol type and value information. 

od 

::dump 

Print a formatted memory dump of a given region. In mdb, ::dump displays a mixed ASCII and hexadecimal display of the region. 

proc 

::ps 

Print a table of the active processes. 

quit 

::quit 

Quit the debugger. 

rd 

::dump 

Print a formatted memory dump of a given region. In mdb, ::dump displays a mixed ASCII and hexadecimal display of the region. 

redirect 

::log 

In mdb, output for input and output can be globally redirected to a log file using ::log. 

search 

::kgrep 

In mdb, the ::kgrep dcmd can be used to search the kernel's address space for a particular value. The pattern match built-in dcmds can also be used to search the physical, virtual, or object files address spaces for patterns. 

stack 

::stack 

The current stack trace can be obtained using ::stack. The stack trace of a particular kernel thread can be determined using the ::findstack dcmd. A memory dump of the current stack can be obtained using the / or ::dump dcmds and the current stack pointer. The $<stackregs macro can be applied to a stack pointer to obtain the per-frame saved register values.

status 

::status 

Display status information about the system or dump being examined by the debugger. 

stream 

::stream 

The mdb ::stream dcmd can be used to format and display the structure of a particular kernel STREAM. If the list of active STREAM structures is needed, the user should execute ::walk stream_head_cache in mdb and pipe the resulting addresses to an appropriate formatting dcmd or macro. 

strstat 

::kmastat 

The ::kmastat dcmd displays a superset of the information reported by the strstat function.

trace 

::stack 

The current stack trace can be obtained using ::stack. The stack trace of a particular kernel thread can be determined using the ::findstack dcmd. A memory dump of the current stack can be obtained using the / or ::dump dcmds and the current stack pointer. The $<stackregs macro can be applied to a stack pointer to obtain the per-frame saved register values.

var 

$<v 

Print the tunable system parameters in the global var structure.

vfs 

::fsinfo 

Print information about mounted file systems. 

vtop 

::vtop 

Print the physical address translation of the given virtual address.