--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/debugsrv/runmodedebug/rmdriver/src/debug_utils.cpp Thu Sep 02 22:05:40 2010 +0300
@@ -0,0 +1,134 @@
+// Copyright (c) 2004-2010 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Purpose: Implementation of static functions for use by debug driver classes
+//
+
+#include "debug_logging.h"
+#include "debug_utils.h"
+
+/**
+ * Given a thread ID, return a handle to the corresponding DThread. If the returned
+ * pointer is non-NULL, it is the responsibility of the caller to close the handle.
+ *
+ * @pre caller must be in thread critical section
+ * @post if a non-NULL value is returned then a handle to the thread has been
+ * opened on the callers behalf
+ * @param aThreadId ID of the thread to return a handle for
+ * @return a DThread* to the appropriate thread, or NULL if a handle could not be
+ * opened to the specified thread
+ */
+DThread* DebugUtils::OpenThreadHandle(TUint64 aThreadId)
+ {
+ __ASSERT_CRITICAL;
+ LOG_MSG2("DebugUtils::OpenThreadHandle(0x%lx)", aThreadId);
+
+ DObjectCon& threads = *Kern::Containers()[EThread]; // Get containing holding threads
+ threads.Wait(); // Obtain the container mutex so the list does get changed under us
+
+ DThread* thread = Kern::ThreadFromId(aThreadId);
+
+ // Open a handle to the thread so that it doesn't exit while we are processing
+ if (thread)
+ {
+ // if opening a handle fails then set thread to NULL
+ if(KErrNone != thread->Open())
+ {
+ LOG_MSG2("\tCould not open handle to thread %d", (TUint32)aThreadId);
+ thread = NULL;
+ }
+ }
+ else
+ {
+ LOG_MSG2("\tThread with ID %d is NULL", (TUint32)aThreadId);
+ }
+
+ threads.Signal(); // Release the container mutex
+
+ return thread;
+ }
+
+/**
+ * Given a process ID, return a handle to the corresponding DProcess. If the returned
+ * pointer is non-NULL, it is the responsibility of the caller to close the handle.
+ *
+ * @post if a non-NULL value is returned then a handle to the process has been
+ * opened on the callers behalf
+ * @param aProcessId ID of the process to return a handle for
+ * @return a DProcess* to the appropriate process, or NULL if a handle could not be
+ * opened to the specified process
+ */
+DProcess* DebugUtils::OpenProcessHandle(const TUint64 aProcessId)
+ {
+ // Commenting out this message as it gets printed out every time a RDebug::Printf statement is caught by the driver,
+ // which makes looking at the serial cable output irritating. Replaced it with LOG_MSG statements below to indicate if
+ // something amiss happened. By default then this function prints nothing out.
+ //LOG_MSG("DebugUtils::OpenProcessHandle()");
+
+ NKern::ThreadEnterCS(); // Prevent us from dying or suspending whilst holding a DMutex
+ DObjectCon& processes = *Kern::Containers()[EProcess]; // Get containing holding threads
+ processes.Wait(); // Obtain the container mutex so the list does get changed under us
+
+ DProcess* process = Kern::ProcessFromId(aProcessId);
+
+ // Open a handle to the process so that it doesn't exit while we are processing
+ if (process)
+ {
+ // if opening a handle fails then set process to NULL
+ if(KErrNone != process->Open())
+ {
+ LOG_MSG2("DebugUtils::OpenProcessHandle(): Could not open handle for 0x%lx", aProcessId);
+ process = NULL;
+ }
+ }
+ else
+ {
+ LOG_MSG2("DebugUtils::OpenProcessHandle(): Could not find process for 0x%lx", aProcessId);
+ }
+
+ processes.Signal(); // Release the container mutex
+ NKern::ThreadLeaveCS(); // End of critical section
+
+ return process;
+ }
+
+/**
+ * Opens a reference to the first thread of the given process. Returns NULL if
+ * there are no threads remaining in the process or if the thread couldn't be opened.
+ *
+ * @pre Caller must be in thread context, in critical section, no fast mutexes held.
+ * @post if result is non-NULL caller is responsible for closing the handle
+ * @param aProcess The process whose first thread is to be opened
+ * @return an Open()ed pointer to the first thread in the process, or NULL.
+ */
+DThread* DebugUtils::OpenFirstThreadForProcess(DProcess* aProcess)
+ {
+ __ASSERT_CRITICAL;
+ // Copied from memspy's DMemSpyDriverOSAdaptionDProcess::OpenFirstThread()
+
+ // It appears that the system lock needs to be held while manipulating the iThreadQ
+ DThread* result = NULL;
+ NKern::LockSystem();
+ // We don't use DProcess::FirstThread() as that doesn't appear to do any checking of whether the list is empty, ie if there are no threads at all
+ SDblQueLink* threadLink = aProcess->iThreadQ.First();
+ if (threadLink != NULL && threadLink != &aProcess->iThreadQ.iA)
+ {
+ result = _LOFF(threadLink,DThread,iProcessLink);
+ if (result->Open() != KErrNone)
+ {
+ result = NULL;
+ }
+ }
+ NKern::UnlockSystem();
+ return result;
+ }