Revert "Add tracing to logging framework"

The tracing API still misses some real-world exposure. Let's
re-do this in dev to have more time.

This reverts parts of following commits:

466e0dff4bb686e51d0ab3f905631fcb7dd8bfef
7a47aebe9ed41d6cd9c9bcd45758d4d553668e99
a652bab6a7ebf78b029fea95c2801deb6f4f524a
8f0654ceb878b6c8a08c7f5b790027c26e007c13
4162522edd9d31bd2798ab37f083adff818d886e
32f27b4367c4e042a3f0cda671579494e31c1d69
9ff81bdc1ab4e3d14914192cd63ae625a507fe90

Change-Id: If97340c37b8b3363f597683336a8390d5ff386f1
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>

3 files changed, 0 insertions, 241 deletions

diff --git a/src/corelib/doc/snippets/qtracer/ftracer.cpp b/src/corelib/doc/snippets/qtracer/ftracer.cpp
deleted file mode 100644
index b12e3ed9c3..0000000000
--- a/src/corelib/doc/snippets/qtracer/ftracer.cpp
+++ /dev/null
@@ -1,180 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
-**     of its contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <QCoreApplication>
-#include <QLoggingCategory>
-
-
-//![1]
-QLoggingCategory theFooArea("foo");
-QLoggingCategory theBarArea("bar");
-QLoggingCategory theBazArea("baz");
-//![1]
-
-// Note: These locations are Ubuntu specific.
-
-// Note: To make the example work with user permissions, make sure
-// the files are user-writable and the path leading there accessible.
-
-const char traceSwitch[] = "/sys/kernel/debug/tracing/tracing_on";
-const char traceSink[] = "/sys/kernel/debug/tracing/trace_marker";
-
-// The base class only serves as a facility to share code
-// between the "single line" data logging aspect and the
-// scoped "measuring" aspect.
-
-// Both aspects and the base class could be combined into
-// a single tracer serving both purposes, but are split
-// here for clarity.
-
-// Error handling is left as an exercise.
-
-//![2]
-class MyTracerBase : public QTracer
-{
-public:
-    MyTracerBase() {
-        enable = ::open(traceSwitch, O_WRONLY);
-        marker = ::open(traceSink, O_WRONLY);
-    }
-
-    ~MyTracerBase() {
-        ::close(enable);
-        ::close(marker);
-    }
-
-protected:
-    int enable;
-    int marker;
-};
-//![2]
-
-
-//![2]
-class MyTracer : public MyTracerBase
-{
-public:
-    void start() { ::write(marker, "B", 1); }
-    void end() { ::write(marker, "E", 1); }
-};
-//![2]
-
-
-//![3]
-class MyDataLogger : public MyTracerBase
-{
-public:
-    MyDataLogger() {
-        buf[0] = 0;
-        pos = 0;
-    }
-
-    void record(int i) { pos += sprintf(buf + pos, "%d", i); }
-    void record(const char *msg) { pos += sprintf(buf + pos, "%s", msg); }
-    void end() { ::write(marker, buf, pos); pos = 0; }
-
-private:
-    char buf[100];
-    int pos;
-};
-//![3]
-
-// Simplest possible example for "measuring".
-//![4]
-int foo(int i)
-{
-    qCTraceGuard(theFooArea);
-    // Here could be some lengthy code.
-    return i * i;
-}
-//![4]
-
-// We can switch on/off tracing dynamically.
-// The tracer will be temporarily switched off at the third call
-// and re-enabled at the eighth.
-//![5]
-int bar(int i)
-{
-    static int n = 0;
-    ++n;
-    if (n == 3)
-        theBarArea.setEnabled(QtTraceMsg, false);
-    if (n == 8)
-        theBarArea.setEnabled(QtTraceMsg, true);
-
-    qCTraceGuard(theBarArea);
-    return i * i;
-}
-//![5]
-
-// An example to create "complex" log messages.
-//![6]
-int baz(int i)
-{
-    qCTrace(theBazArea) << 32 << "some stuff";
-
-    return i * i;
-}
-//![6]
-
-
-
-//![7]
-namespace {
-static struct Init
-{
-    Init() {
-        tracer.addToCategory(theFooArea);
-        tracer.addToCategory(theBarArea);
-        logger.addToCategory(theBazArea);
-    }
-
-    MyTracer tracer;
-    MyDataLogger logger;
-
-} initializer;
-}
-//![7]
diff --git a/src/corelib/doc/snippets/qtracer/main.cpp b/src/corelib/doc/snippets/qtracer/main.cpp
deleted file mode 100644
index 758a2bbdb8..0000000000
--- a/src/corelib/doc/snippets/qtracer/main.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
-**     of its contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-int foo(int i);
-int bar(int i);
-int baz(int i);
-
-int main()
-{
-    int s = 0;
-    for (int i = 0; i != 10; ++i)
-        s += foo(i);
-
-    for (int i = 0; i != 10; ++i)
-        s += bar(i);
-
-    for (int i = 0; i != 10; ++i)
-        s += baz(i);
-
-    return s;
-}
-
diff --git a/src/corelib/doc/snippets/qtracer/qtracer.pro b/src/corelib/doc/snippets/qtracer/qtracer.pro
deleted file mode 100644
index 254e22be76..0000000000
--- a/src/corelib/doc/snippets/qtracer/qtracer.pro
+++ /dev/null
@@ -1,2 +0,0 @@
-
-SOURCES += ftracer.cpp main.cpp