Microsoft(R) Debugging Tools for Windows(R)
DbgExts.dll DBGENG Sample Extension
README
Overview
This extension DLL shows how to write a debugger engine-style extension and
demonstrates use of a few APIs required by and provided to extension DLLs.
----------
Required and Optional Initialization
This mandatory routine must be implemented and exported for debugger engine
style extensions:
HRESULT
CALLBACK
DebugExtensionInitialize(PULONG Version, PULONG Flags)
This is called on loading of the extension DLL. Global variables and flags
for the extension should be initialized in this routine. One of the useful
things that is done in this routine is to initialize "ExtensionApis" as a
WINDBG_EXTENSION_APIS global variable from the lpExtensionApis parameter.
lpExtensionApis has pointers to some commonly used APIs for memory reads
and I/O.
This function should return the extension version in *Version. Flags is a
reserved parameter for future use and should be set to 0.
A debug session may not be active when the extension DLL is loaded so
initialization code here should not presume to be able to query for debug
session information.
All new dbgeng interface-style extensions can be identified by the
presence of the DebugExtensionInitialize export.
These next two routines are optional but it is recommended to implement these
routines in a debugger extension for better control of the debug session:
CALLBACK
DebugExtensionNotify(ULONG Notify, ULONG64 Argument)
This is used to notify the extension DLL of changes in debug session
states, e.g. when the session becomes accessible etc. Look at the
DEBUG_NOTIFY* definitions in dbgeng.h for argument values (active,
inactive, accessible, inaccessible).
Use of this function allows an extension to cache debug session related
info without needing to register explicit callbacks.
CALLBACK
DebugExtensionUninitialize(void)
This is called when a DLL is unloaded and can be used for cleanup related
code.
----------
Anatomy of an Extension Call
A debugger extension is a function with the following declared type:
HRESULT
CALLBACK
DebugExtensionCall(PDEBUG_CLIENT Client, PCSTR args)
Where "DebugExtensionCall" is an actual name of the extension being
implemented, such as "stack" for a !stack extension.
This is the recommended function prototype to use but, in reality,
extensions can use any prototype with one restriction - the function name
must begin with _EFN_ to distinguish the function as an extension function
some arbitrary, or normal, function. The debugger's
IDebugControl::GetExtensionFunction automatically prepends _EFN_ when
searching for the function in the extension DLL.
The Client parameter is the initial pointer to the debug engine's
IDebugClient interface.
The args parameter is simply the command line argument string passed to
the extension. It can be NULL or empty.
An extension can return DEBUG_EXTENSION_CONTINUE_SEARCH if the extension
cannot handle the request and in this case the debugger will search the
next path in the extension DLL chain.
In this sample, upon entering each extension, all required engine interfaces
are queried from the DEBUG_CLIENT using the INIT_API() macro. The same
interfaces are released using the EXIT_API() macro.
INIT_API() simply encapsulates a call to ExtQuery() and EXIT_API encapsulates
ExtRelease(). Any interfaces queried from the debugger engine should be
released before exit.
----------
Extensions Implemented in this Sample
cmdsample
This demonstrates use of engine APIs like IDebugControl::Execute, Output and
OutputStackTrace.
structsample
This shows how to read data from the target using helper definitions from the
wdbgexts.h header file. More importantly, it shows how to use types to read
values correctly so that the extension does not need to be rewritten when the
type definition changes for the target.
help
Extension DLLs should implement one extension called 'help' which shows
descriptions for the extension commands provided by the extension DLL.
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Win7 WDK tools
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Win7 WDK tools (1738个子文件)
dl_findfile.al 4KB
chkinf.bat 15KB
blockdir 24B
osmodel.c 364KB
osmodel.c 288KB
osmodel.c 182KB
main.c 28KB
main.c 24KB
main.c 22KB
fail_driver3.c 8KB
fail_driver6.c 6KB
fail_driver1.c 6KB
fail_driver2.c 6KB
fail_driver5.c 5KB
fail_driver1.c 5KB
fail_driver2.c 5KB
fail_driver7.c 5KB
fail_driver3.c 4KB
fail_driver4.c 3KB
fail_library5.c 3KB
exts.c 3KB
fail_library4.c 3KB
fail_library6.c 2KB
fail_library3.c 2KB
fail_library7.c 2KB
fail_library1.c 2KB
simple.c 1KB
fail_library2.c 1KB
pnp.c 1KB
fail_library2.c 1KB
wmi.c 1KB
power.c 879B
placehold5.c 397B
placehold3.c 397B
placehold4.c 397B
placehold2.c 397B
placehold1.c 397B
PROCALC2.CAB 1.92MB
ContentCatalog.cat 331KB
ContentCatalog.cat 38KB
ContentCatalog.cat 18KB
ContentCatalog.cat 18KB
ContentCatalog.cat 16KB
ContentCatalog.cat 15KB
1394dbg.cat 14KB
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ContentCatalog.cat 8KB
ContentCatalog.cat 8KB
ContentCatalog.cat 8KB
usb2dbg.cat 8KB
ContentCatalog.cat 8KB
delta.cat 8KB
delta.cat 8KB
delta.cat 7KB
ContentCatalog.cat 7KB
ContentCatalog.cat 7KB
ContentCatalog.cat 7KB
drvcov.cat 6KB
drvcov.cat 6KB
drvcov.cat 5KB
iospy.cat 5KB
iospy.cat 5KB
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