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Added support for system-wide hooks.

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This commit is contained in:
Alexandre Julliard 2002-11-20 19:54:32 +00:00
parent 910aebbc8e
commit 14e68ba7fe
7 changed files with 142 additions and 33 deletions
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61
dlls/user/hook.c
View file

@ -69,6 +69,7 @@
#include "queue.h"
#include "win.h"
#include "wine/server.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(hook);
@ -103,6 +104,7 @@ static const char * const hook_names[WH_MAXHOOK - WH_MINHOOK + 1] =
static HHOOK set_windows_hook( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid, BOOL unicode )
{
HHOOK handle = 0;
WCHAR module[MAX_PATH];
if (tid) /* thread-local hook */
{
@ -116,23 +118,29 @@ static HHOOK set_windows_hook( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid,
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
inst = 0;
}
else /* system-global hook */
{
if (!inst)
if (!inst || !GetModuleFileNameW( inst, module, MAX_PATH ))
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
FIXME( "system hook %s won't work right\n", hook_names[id-WH_MINHOOK] );
}
SERVER_START_REQ( set_hook )
{
req->id = id;
req->tid = tid;
req->proc = proc;
req->unicode = unicode;
if (inst) /* make proc relative to the module base */
{
req->proc = (void *)((char *)proc - (char *)inst);
wine_server_add_data( req, module, strlenW(module) * sizeof(WCHAR) );
}
else req->proc = proc;
if (!wine_server_call_err( req )) handle = reply->handle;
}
SERVER_END_REQ;
@ -228,6 +236,25 @@ static LRESULT call_hook( HOOKPROC proc, INT id, INT code, WPARAM wparam, LPARAM
}
/***********************************************************************
* get_hook_proc
*
* Retrieve the hook procedure real value for a module-relative proc
*/
static HOOKPROC get_hook_proc( HOOKPROC proc, const WCHAR *module )
{
HMODULE mod;
if (!(mod = GetModuleHandleW(module)))
{
TRACE( "loading %s\n", debugstr_w(module) );
/* FIXME: the library will never be freed */
if (!(mod = LoadLibraryW(module))) return NULL;
}
return (HOOKPROC)((char *)mod + (ULONG_PTR)proc);
}
/***********************************************************************
* HOOK_CallHooks
*/
@ -236,17 +263,19 @@ LRESULT HOOK_CallHooks( INT id, INT code, WPARAM wparam, LPARAM lparam, BOOL uni
MESSAGEQUEUE *queue = QUEUE_Current();
HOOKPROC proc = NULL;
HHOOK prev;
WCHAR module[MAX_PATH];
BOOL unicode_hook = FALSE;
LRESULT ret = 0;
int locks;
if (!queue) return 0;
prev = queue->hook;
SERVER_START_REQ( start_hook_chain )
{
req->id = id;
wine_server_set_reply( req, module, sizeof(module)-sizeof(WCHAR) );
if (!wine_server_call_err( req ))
{
module[wine_server_reply_size(req) / sizeof(WCHAR)] = 0;
queue->hook = reply->handle;
proc = reply->proc;
unicode_hook = reply->unicode;
@ -256,12 +285,15 @@ LRESULT HOOK_CallHooks( INT id, INT code, WPARAM wparam, LPARAM lparam, BOOL uni
if (proc)
{
TRACE( "calling hook %p %s code %x wp %x lp %lx\n",
proc, hook_names[id-WH_MINHOOK], code, wparam, lparam );
TRACE( "calling hook %p %s code %x wp %x lp %lx module %s\n",
proc, hook_names[id-WH_MINHOOK], code, wparam, lparam, debugstr_w(module) );
locks = WIN_SuspendWndsLock();
ret = call_hook( proc, id, code, wparam, lparam, unicode, unicode_hook );
WIN_RestoreWndsLock( locks );
if (!module[0] || (proc = get_hook_proc( proc, module )) != NULL)
{
int locks = WIN_SuspendWndsLock();
ret = call_hook( proc, id, code, wparam, lparam, unicode, unicode_hook );
WIN_RestoreWndsLock( locks );
}
SERVER_START_REQ( finish_hook_chain )
{
@ -367,6 +399,7 @@ LRESULT WINAPI CallNextHookEx( HHOOK hhook, INT code, WPARAM wparam, LPARAM lpar
{
MESSAGEQUEUE *queue = QUEUE_Current();
HHOOK prev;
WCHAR module[MAX_PATH];
HOOKPROC proc = NULL;
INT id = 0;
BOOL prev_unicode = FALSE, next_unicode = FALSE;
@ -377,8 +410,10 @@ LRESULT WINAPI CallNextHookEx( HHOOK hhook, INT code, WPARAM wparam, LPARAM lpar
SERVER_START_REQ( get_next_hook )
{
req->handle = prev;
wine_server_set_reply( req, module, sizeof(module)-sizeof(WCHAR) );
if (!wine_server_call_err( req ))
{
module[wine_server_reply_size(req) / sizeof(WCHAR)] = 0;
queue->hook = reply->next;
id = reply->id;
proc = reply->proc;
@ -387,12 +422,14 @@ LRESULT WINAPI CallNextHookEx( HHOOK hhook, INT code, WPARAM wparam, LPARAM lpar
}
}
SERVER_END_REQ;
if (proc)
{
TRACE( "calling hook %p %s code %x wp %x lp %lx\n",
proc, hook_names[id-WH_MINHOOK], code, wparam, lparam );
TRACE( "calling hook %p %s code %x wp %x lp %lx module %s\n",
proc, hook_names[id-WH_MINHOOK], code, wparam, lparam, debugstr_w(module) );
return call_hook( proc, id, code, wparam, lparam, prev_unicode, next_unicode );
if (!module[0] || (proc = get_hook_proc( proc, module )) != NULL)
return call_hook( proc, id, code, wparam, lparam, prev_unicode, next_unicode );
}
queue->hook = prev;
return ret;

5
include/wine/server_protocol.h
View file

@ -2874,6 +2874,7 @@ struct set_hook_request
thread_id_t tid;
void* proc;
int unicode;
/* VARARG(module,unicode_str); */
};
struct set_hook_reply
{
@ -2908,6 +2909,7 @@ struct start_hook_chain_reply
user_handle_t handle;
void* proc;
int unicode;
/* VARARG(module,unicode_str); */
};
@ -2937,6 +2939,7 @@ struct get_next_hook_reply
void* proc;
int prev_unicode;
int next_unicode;
/* VARARG(module,unicode_str); */
};
@ -3463,6 +3466,6 @@ union generic_reply
struct get_next_hook_reply get_next_hook_reply;
};
#define SERVER_PROTOCOL_VERSION 89
#define SERVER_PROTOCOL_VERSION 90
#endif /* __WINE_WINE_SERVER_PROTOCOL_H */

88
server/hook.c
View file

@ -41,6 +41,8 @@ struct hook
int index; /* hook table index */
void *proc; /* hook function */
int unicode; /* is it a unicode hook? */
WCHAR *module; /* module name for global hooks */
size_t module_size;
};
#define NB_HOOKS (WH_MAXHOOK-WH_MINHOOK+1)
@ -74,6 +76,8 @@ static const struct object_ops hook_table_ops =
};
static struct hook_table *global_hooks;
/* create a new hook table */
static struct hook_table *alloc_hook_table(void)
{
@ -95,12 +99,13 @@ static struct hook_table *alloc_hook_table(void)
static struct hook *add_hook( struct thread *thread, int index )
{
struct hook *hook;
struct hook_table *table = thread->hooks;
struct hook_table *table = thread ? thread->hooks : global_hooks;
if (!table)
{
if (!(table = alloc_hook_table())) return NULL;
thread->hooks = table;
if (thread) thread->hooks = table;
else global_hooks = table;
}
if (!(hook = mem_alloc( sizeof(*hook) ))) return NULL;
@ -119,6 +124,7 @@ static struct hook *add_hook( struct thread *thread, int index )
static void free_hook( struct hook *hook )
{
free_user_handle( hook->handle );
if (hook->module) free( hook->module );
if (hook->thread) release_object( hook->thread );
list_remove( &hook->chain );
free( hook );
@ -144,7 +150,7 @@ static struct hook *find_hook( struct thread *thread, int index, void *proc )
/* get the hook table that a given hook belongs to */
inline static struct hook_table *get_table( struct hook *hook )
{
return hook->thread->hooks;
return hook->thread ? hook->thread->hooks : global_hooks;
}
/* get the first hook in the chain */
@ -154,23 +160,37 @@ inline static struct hook *get_first_hook( struct hook_table *table, int index )
return elem ? HOOK_ENTRY( elem ) : NULL;
}
/* find the first non-deleted hook in the chain */
inline static struct hook *get_first_valid_hook( struct hook_table *table, int index )
{
struct hook *hook = get_first_hook( table, index );
while (hook && !hook->proc)
hook = HOOK_ENTRY( list_next( &table->hooks[index], &hook->chain ) );
return hook;
}
/* find the next hook in the chain, skipping the deleted ones */
static struct hook *get_next_hook( struct hook *hook )
{
struct hook_table *table = get_table( hook );
struct hook *next;
int index = hook->index;
while ((next = HOOK_ENTRY( list_next( &table->hooks[hook->index], &hook->chain ) )))
while ((hook = HOOK_ENTRY( list_next( &table->hooks[index], &hook->chain ) )))
{
if (next->proc) break;
if (hook->proc) return hook;
}
return next;
if (global_hooks && table != global_hooks) /* now search through the global table */
{
hook = get_first_valid_hook( global_hooks, index );
}
return hook;
}
static void hook_table_dump( struct object *obj, int verbose )
{
/* struct hook_table *table = (struct hook_table *)obj; */
fprintf( stderr, "Hook table\n" );
struct hook_table *table = (struct hook_table *)obj;
if (table == global_hooks) fprintf( stderr, "Global hook table\n" );
else fprintf( stderr, "Hook table\n" );
}
static void hook_table_destroy( struct object *obj )
@ -185,6 +205,12 @@ static void hook_table_destroy( struct object *obj )
}
}
/* free the global hooks table */
void close_global_hooks(void)
{
if (global_hooks) release_object( global_hooks );
}
/* remove a hook, freeing it if the chain is not in use */
static void remove_hook( struct hook *hook )
{
@ -221,22 +247,41 @@ DECL_HANDLER(set_hook)
{
struct thread *thread;
struct hook *hook;
WCHAR *module;
size_t module_size = get_req_data_size();
if (!req->proc || req->id < WH_MINHOOK || req->id > WH_MAXHOOK)
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (!req->tid) thread = (struct thread *)grab_object( current );
else if (!(thread = get_thread_from_id( req->tid ))) return;
if (!req->tid)
{
if (!module_size)
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (!(module = memdup( get_req_data(), module_size ))) return;
thread = NULL;
}
else
{
module = NULL;
if (!(thread = get_thread_from_id( req->tid ))) return;
}
if ((hook = add_hook( thread, req->id - WH_MINHOOK )))
{
hook->proc = req->proc;
hook->unicode = req->unicode;
hook->proc = req->proc;
hook->unicode = req->unicode;
hook->module = module;
hook->module_size = module_size;
reply->handle = hook->handle;
}
release_object( thread );
else if (module) free( module );
if (thread) release_object( thread );
}
@ -271,12 +316,19 @@ DECL_HANDLER(start_hook_chain)
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (!table) return; /* no hook set */
if (!(hook = get_first_hook( table, req->id - WH_MINHOOK ))) return; /* no hook set */
if (!table || !(hook = get_first_valid_hook( table, req->id - WH_MINHOOK )))
{
/* try global table */
if (!(table = global_hooks) ||
!(hook = get_first_valid_hook( global_hooks, req->id - WH_MINHOOK )))
return; /* no hook set */
}
reply->handle = hook->handle;
reply->proc = hook->proc;
reply->unicode = hook->unicode;
table->counts[hook->index]++;
if (hook->module) set_reply_data( hook->module, hook->module_size );
}
@ -292,6 +344,7 @@ DECL_HANDLER(finish_hook_chain)
return;
}
if (table) release_hook_chain( table, index );
if (global_hooks) release_hook_chain( global_hooks, index );
}
@ -301,7 +354,7 @@ DECL_HANDLER(get_next_hook)
struct hook *hook, *next;
if (!(hook = get_user_object( req->handle, USER_HOOK ))) return;
if (hook->thread != current)
if (hook->thread && (hook->thread != current))
{
set_error( STATUS_INVALID_HANDLE );
return;
@ -313,5 +366,6 @@ DECL_HANDLER(get_next_hook)
reply->proc = next->proc;
reply->prev_unicode = hook->unicode;
reply->next_unicode = next->unicode;
if (hook->module) set_reply_data( hook->module, hook->module_size );
}
}

3
server/protocol.def
View file

@ -2012,6 +2012,7 @@ enum message_type
thread_id_t tid; /* id of thread to set the hook into */
void* proc; /* hook procedure */
int unicode; /* is it a unicode hook? */
VARARG(module,unicode_str); /* module name */
@REPLY
user_handle_t handle; /* handle to the hook */
@END
@ -2032,6 +2033,7 @@ enum message_type
user_handle_t handle; /* handle to the next hook */
void* proc; /* hook procedure */
int unicode; /* is it a unicode hook? */
VARARG(module,unicode_str); /* module name */
@END
@ -2050,4 +2052,5 @@ enum message_type
void* proc; /* next hook procedure */
int prev_unicode; /* was the previous a unicode hook? */
int next_unicode; /* is the next a unicode hook? */
VARARG(module,unicode_str); /* module name */
@END

2
server/request.c
View file

@ -51,6 +51,7 @@
#include "handle.h"
#include "thread.h"
#include "process.h"
#include "user.h"
#define WANT_REQUEST_HANDLERS
#include "request.h"
@ -742,6 +743,7 @@ static void close_socket_timeout( void *arg )
#ifdef DEBUG_OBJECTS
/* shut down everything properly */
release_object( master_socket );
close_global_hooks();
close_global_handles();
close_registry();
close_atom_table();

12
server/trace.c
View file

@ -2287,7 +2287,9 @@ static void dump_set_hook_request( const struct set_hook_request *req )
fprintf( stderr, " id=%d,", req->id );
fprintf( stderr, " tid=%08x,", req->tid );
fprintf( stderr, " proc=%p,", req->proc );
fprintf( stderr, " unicode=%d", req->unicode );
fprintf( stderr, " unicode=%d,", req->unicode );
fprintf( stderr, " module=" );
dump_varargs_unicode_str( cur_size );
}
static void dump_set_hook_reply( const struct set_hook_reply *req )
@ -2311,7 +2313,9 @@ static void dump_start_hook_chain_reply( const struct start_hook_chain_reply *re
{
fprintf( stderr, " handle=%p,", req->handle );
fprintf( stderr, " proc=%p,", req->proc );
fprintf( stderr, " unicode=%d", req->unicode );
fprintf( stderr, " unicode=%d,", req->unicode );
fprintf( stderr, " module=" );
dump_varargs_unicode_str( cur_size );
}
static void dump_finish_hook_chain_request( const struct finish_hook_chain_request *req )
@ -2330,7 +2334,9 @@ static void dump_get_next_hook_reply( const struct get_next_hook_reply *req )
fprintf( stderr, " id=%d,", req->id );
fprintf( stderr, " proc=%p,", req->proc );
fprintf( stderr, " prev_unicode=%d,", req->prev_unicode );
fprintf( stderr, " next_unicode=%d", req->next_unicode );
fprintf( stderr, " next_unicode=%d,", req->next_unicode );
fprintf( stderr, " module=" );
dump_varargs_unicode_str( cur_size );
}
static const dump_func req_dumpers[REQ_NB_REQUESTS] = {

4
server/user.h
View file

@ -42,6 +42,10 @@ extern user_handle_t get_user_full_handle( user_handle_t handle );
extern void *free_user_handle( user_handle_t handle );
extern void *next_user_handle( user_handle_t *handle, enum user_object type );
/* hook functions */
extern void close_global_hooks(void);
/* queue functions */
extern void free_msg_queue( struct thread *thread );