xserver: Branch 'master'
Keith Packard
keithp at kemper.freedesktop.org
Thu Dec 1 07:15:18 PST 2011
Xext/security.c | 4 +---
Xext/xselinux_hooks.c | 4 ++--
dix/dispatch.c | 23 +++++++++++++----------
dix/extension.c | 14 --------------
include/dixstruct.h | 1 +
include/extension.h | 2 --
record/record.c | 8 +++-----
7 files changed, 20 insertions(+), 36 deletions(-)
New commits:
commit fb22a408c69a84f81905147de9e82cf66ffb6eb2
Author: Keith Packard <keithp at keithp.com>
Date: Tue Nov 8 10:13:15 2011 -0800
Save major/minor opcodes in ClientRec for RecordAReply
The record extension needs the major and minor opcodes in the reply
hook, but the request buffer may have been freed by the time the hook
is invoked. Saving the request major and minor codes as the request is
executed avoids fetching from the defunct request buffer.
This patch also eliminates the public MinorOpcodeOfRequest function,
inlining it into Dispatch. Usages of that function have been replaced
with direct access to the new ClientRec field.
Signed-off-by: Keith Packard <keithp at keithp.com>
Reviewed-by: Jamey Sharp <jamey at minilop.net>
diff --git a/Xext/security.c b/Xext/security.c
index 0a63aa2..6fc1eaf 100644
--- a/Xext/security.c
+++ b/Xext/security.c
@@ -148,9 +148,7 @@ SecurityLabelInitial(void)
static _X_INLINE const char *
SecurityLookupRequestName(ClientPtr client)
{
- int major = ((xReq *)client->requestBuffer)->reqType;
- int minor = MinorOpcodeOfRequest(client);
- return LookupRequestName(major, minor);
+ return LookupRequestName(client->majorOp, client->minorOp);
}
diff --git a/Xext/xselinux_hooks.c b/Xext/xselinux_hooks.c
index f1d8e5d..0d4c9ab 100644
--- a/Xext/xselinux_hooks.c
+++ b/Xext/xselinux_hooks.c
@@ -263,8 +263,8 @@ SELinuxAudit(void *auditdata,
if (client) {
REQUEST(xReq);
if (stuff) {
- major = stuff->reqType;
- minor = MinorOpcodeOfRequest(client);
+ major = client->majorOp;
+ minor = client->minorOp;
}
}
if (audit->id)
diff --git a/dix/dispatch.c b/dix/dispatch.c
index 6e33615..b39271f 100644
--- a/dix/dispatch.c
+++ b/dix/dispatch.c
@@ -337,8 +337,6 @@ DisableLimitedSchedulingLatency(void)
SmartScheduleLatencyLimited = 0;
}
-#define MAJOROP ((xReq *)client->requestBuffer)->reqType
-
void
Dispatch(void)
{
@@ -419,21 +417,28 @@ Dispatch(void)
}
client->sequence++;
+ client->majorOp = ((xReq *)client->requestBuffer)->reqType;
+ client->minorOp = 0;
+ if (client->majorOp >= EXTENSION_BASE) {
+ ExtensionEntry *ext = GetExtensionEntry(client->majorOp);
+ if (ext)
+ client->minorOp = ext->MinorOpcode(client);
+ }
#ifdef XSERVER_DTRACE
- XSERVER_REQUEST_START(LookupMajorName(MAJOROP), MAJOROP,
+ XSERVER_REQUEST_START(LookupMajorName(client->majorOp), client->majorOp,
((xReq *)client->requestBuffer)->length,
client->index, client->requestBuffer);
#endif
if (result > (maxBigRequestSize << 2))
result = BadLength;
else {
- result = XaceHookDispatch(client, MAJOROP);
+ result = XaceHookDispatch(client, client->majorOp);
if (result == Success)
- result = (* client->requestVector[MAJOROP])(client);
+ result = (* client->requestVector[client->majorOp])(client);
XaceHookAuditEnd(client, result);
}
#ifdef XSERVER_DTRACE
- XSERVER_REQUEST_DONE(LookupMajorName(MAJOROP), MAJOROP,
+ XSERVER_REQUEST_DONE(LookupMajorName(client->majorOp), client->majorOp,
client->sequence, client->index, result);
#endif
@@ -444,8 +449,8 @@ Dispatch(void)
}
else if (result != Success)
{
- SendErrorToClient(client, MAJOROP,
- MinorOpcodeOfRequest(client),
+ SendErrorToClient(client, client->majorOp,
+ client->minorOp,
client->errorValue, result);
break;
}
@@ -466,8 +471,6 @@ Dispatch(void)
SmartScheduleLatencyLimited = 0;
}
-#undef MAJOROP
-
static int VendorRelease = VENDOR_RELEASE;
static char *VendorString = VENDOR_NAME;
diff --git a/dix/extension.c b/dix/extension.c
index 53aaf05..cc516b6 100644
--- a/dix/extension.c
+++ b/dix/extension.c
@@ -228,20 +228,6 @@ StandardMinorOpcode(ClientPtr client)
return ((xReq *)client->requestBuffer)->data;
}
-unsigned short
-MinorOpcodeOfRequest(ClientPtr client)
-{
- unsigned char major;
-
- major = ((xReq *)client->requestBuffer)->reqType;
- if (major < EXTENSION_BASE)
- return 0;
- major -= EXTENSION_BASE;
- if (major >= NumExtensions)
- return 0;
- return (*extensions[major]->MinorOpcode)(client);
-}
-
void
CloseDownExtensions(void)
{
diff --git a/include/dixstruct.h b/include/dixstruct.h
index 6cc9614..0a85f40 100644
--- a/include/dixstruct.h
+++ b/include/dixstruct.h
@@ -122,6 +122,7 @@ typedef struct _Client {
DeviceIntPtr clientPtr;
ClientIdPtr clientIds;
+ unsigned short majorOp, minorOp;
} ClientRec;
/*
diff --git a/include/extension.h b/include/extension.h
index ee6260e..17accaf 100644
--- a/include/extension.h
+++ b/include/extension.h
@@ -52,8 +52,6 @@ _XFUNCPROTOBEGIN
extern _X_EXPORT unsigned short StandardMinorOpcode(ClientPtr /*client*/);
-extern _X_EXPORT unsigned short MinorOpcodeOfRequest(ClientPtr /*client*/);
-
extern _X_EXPORT Bool EnableDisableExtension(const char *name, Bool enable);
extern _X_EXPORT void EnableDisableExtensionError(const char *name, Bool enable);
diff --git a/record/record.c b/record/record.c
index db77b64..b956b4a 100644
--- a/record/record.c
+++ b/record/record.c
@@ -552,7 +552,7 @@ RecordARequest(ClientPtr client)
}
else /* extension, check minor opcode */
{
- int minorop = MinorOpcodeOfRequest(client);
+ int minorop = client->minorOp;
int numMinOpInfo;
RecordMinorOpPtr pMinorOpInfo = pRCAP->pRequestMinOpInfo;
@@ -609,12 +609,9 @@ RecordAReply(CallbackListPtr *pcbl, pointer nulldata, pointer calldata)
RecordContextPtr pContext;
RecordClientsAndProtocolPtr pRCAP;
int eci;
- int majorop;
ReplyInfoRec *pri = (ReplyInfoRec *)calldata;
ClientPtr client = pri->client;
- REQUEST(xReq);
- majorop = stuff->reqType;
for (eci = 0; eci < numEnabledContexts; eci++)
{
pContext = ppAllContexts[eci];
@@ -622,6 +619,7 @@ RecordAReply(CallbackListPtr *pcbl, pointer nulldata, pointer calldata)
NULL);
if (pRCAP)
{
+ int majorop = client->majorOp;
if (pContext->continuedReply)
{
RecordAProtocolElement(pContext, client, XRecordFromServer,
@@ -642,7 +640,7 @@ RecordAReply(CallbackListPtr *pcbl, pointer nulldata, pointer calldata)
}
else /* extension, check minor opcode */
{
- int minorop = MinorOpcodeOfRequest(client);
+ int minorop = client->minorOp;
int numMinOpInfo;
RecordMinorOpPtr pMinorOpInfo = pRCAP->pReplyMinOpInfo;
assert (pMinorOpInfo);
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