atrace moved to cmds/atrace in platform/frameworks/native

4 files changed, 0 insertions, 850 deletions

diff --git a/atrace/Android.mk b/atrace/Android.mk
deleted file mode 100644
index 12526d02..00000000
--- a/atrace/Android.mk
+++ /dev/null
@@ -1,17 +0,0 @@
-# Copyright 2012 The Android Open Source Project
-
-LOCAL_PATH:= $(call my-dir)
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES:= atrace.c
-
-LOCAL_C_INCLUDES += external/zlib
-LOCAL_CFLAGS += -std=c99
-
-LOCAL_MODULE:= atrace
-
-LOCAL_MODULE_TAGS:= optional
-
-LOCAL_SHARED_LIBRARIES := libz
-
-include $(BUILD_EXECUTABLE)
diff --git a/atrace/MODULE_LICENSE_APACHE2 b/atrace/MODULE_LICENSE_APACHE2
deleted file mode 100644
index e69de29b..00000000
--- a/atrace/MODULE_LICENSE_APACHE2
+++ /dev/null
diff --git a/atrace/NOTICE b/atrace/NOTICE
deleted file mode 100644
index c77f135e..00000000
--- a/atrace/NOTICE
+++ /dev/null
@@ -1,190 +0,0 @@
-
-   Copyright (c) 2012, The Android Open Source Project
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
-
-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
-   2. Grant of Copyright License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      copyright license to reproduce, prepare Derivative Works of,
-      publicly display, publicly perform, sublicense, and distribute the
-      Work and such Derivative Works in Source or Object form.
-
-   3. Grant of Patent License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      (except as stated in this section) patent license to make, have made,
-      use, offer to sell, sell, import, and otherwise transfer the Work,
-      where such license applies only to those patent claims licensable
-      by such Contributor that are necessarily infringed by their
-      Contribution(s) alone or by combination of their Contribution(s)
-      with the Work to which such Contribution(s) was submitted. If You
-      institute patent litigation against any entity (including a
-      cross-claim or counterclaim in a lawsuit) alleging that the Work
-      or a Contribution incorporated within the Work constitutes direct
-      or contributory patent infringement, then any patent licenses
-      granted to You under this License for that Work shall terminate
-      as of the date such litigation is filed.
-
-   4. Redistribution. You may reproduce and distribute copies of the
-      Work or Derivative Works thereof in any medium, with or without
-      modifications, and in Source or Object form, provided that You
-      meet the following conditions:
-
-      (a) You must give any other recipients of the Work or
-          Derivative Works a copy of this License; and
-
-      (b) You must cause any modified files to carry prominent notices
-          stating that You changed the files; and
-
-      (c) You must retain, in the Source form of any Derivative Works
-          that You distribute, all copyright, patent, trademark, and
-          attribution notices from the Source form of the Work,
-          excluding those notices that do not pertain to any part of
-          the Derivative Works; and
-
-      (d) If the Work includes a "NOTICE" text file as part of its
-          distribution, then any Derivative Works that You distribute must
-          include a readable copy of the attribution notices contained
-          within such NOTICE file, excluding those notices that do not
-          pertain to any part of the Derivative Works, in at least one
-          of the following places: within a NOTICE text file distributed
-          as part of the Derivative Works; within the Source form or
-          documentation, if provided along with the Derivative Works; or,
-          within a display generated by the Derivative Works, if and
-          wherever such third-party notices normally appear. The contents
-          of the NOTICE file are for informational purposes only and
-          do not modify the License. You may add Your own attribution
-          notices within Derivative Works that You distribute, alongside
-          or as an addendum to the NOTICE text from the Work, provided
-          that such additional attribution notices cannot be construed
-          as modifying the License.
-
-      You may add Your own copyright statement to Your modifications and
-      may provide additional or different license terms and conditions
-      for use, reproduction, or distribution of Your modifications, or
-      for any such Derivative Works as a whole, provided Your use,
-      reproduction, and distribution of the Work otherwise complies with
-      the conditions stated in this License.
-
-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-      implied, including, without limitation, any warranties or conditions
-      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
-
-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
diff --git a/atrace/atrace.c b/atrace/atrace.c
deleted file mode 100644
index 64f13e4e..00000000
--- a/atrace/atrace.c
+++ /dev/null
@@ -1,643 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/sendfile.h>
-#include <time.h>
-#include <zlib.h>
-
-#define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
-
-/* Command line options */
-static int g_traceDurationSeconds = 5;
-static bool g_traceSchedSwitch = false;
-static bool g_traceFrequency = false;
-static bool g_traceBusUtilization = false;
-static bool g_traceCpuIdle = false;
-static bool g_traceDisk = false;
-static bool g_traceGovernorLoad = false;
-static bool g_traceSync = false;
-static bool g_traceWorkqueue = false;
-static bool g_traceOverwrite = false;
-static int g_traceBufferSizeKB = 2048;
-static bool g_compress = false;
-static bool g_nohup = false;
-static int g_initialSleepSecs = 0;
-
-/* Global state */
-static bool g_traceAborted = false;
-
-/* Sys file paths */
-static const char* k_traceClockPath =
-    "/sys/kernel/debug/tracing/trace_clock";
-
-static const char* k_traceBufferSizePath =
-    "/sys/kernel/debug/tracing/buffer_size_kb";
-
-static const char* k_tracingOverwriteEnablePath =
-    "/sys/kernel/debug/tracing/options/overwrite";
-
-static const char* k_schedSwitchEnablePath =
-    "/sys/kernel/debug/tracing/events/sched/sched_switch/enable";
-
-static const char* k_schedWakeupEnablePath =
-    "/sys/kernel/debug/tracing/events/sched/sched_wakeup/enable";
-
-static const char* k_memoryBusEnablePath =
-    "/sys/kernel/debug/tracing/events/memory_bus/enable";
-
-static const char* k_cpuFreqEnablePath =
-    "/sys/kernel/debug/tracing/events/power/cpu_frequency/enable";
-
-static const char *k_clockSetRateEnablePath =
-    "/sys/kernel/debug/tracing/events/power/clock_set_rate/enable";
-
-static const char* k_cpuIdleEnablePath =
-    "/sys/kernel/debug/tracing/events/power/cpu_idle/enable";
-
-static const char* k_governorLoadEnablePath =
-    "/sys/kernel/debug/tracing/events/cpufreq_interactive/enable";
-
-static const char* k_syncEnablePath =
-    "/sys/kernel/debug/tracing/events/sync/enable";
-
-static const char* k_workqueueEnablePath =
-    "/sys/kernel/debug/tracing/events/workqueue/enable";
-
-static const char* k_diskEnablePaths[] = {
-        "/sys/kernel/debug/tracing/events/ext4/ext4_sync_file_enter/enable",
-        "/sys/kernel/debug/tracing/events/ext4/ext4_sync_file_exit/enable",
-        "/sys/kernel/debug/tracing/events/block/block_rq_issue/enable",
-        "/sys/kernel/debug/tracing/events/block/block_rq_complete/enable",
-};
-
-static const char* k_tracingOnPath =
-    "/sys/kernel/debug/tracing/tracing_on";
-
-static const char* k_tracePath =
-    "/sys/kernel/debug/tracing/trace";
-
-static const char* k_traceMarkerPath =
-    "/sys/kernel/debug/tracing/trace_marker";
-
-// Check whether a file exists.
-static bool fileExists(const char* filename) {
-    return access(filename, F_OK) != -1;
-}
-
-// Write a string to a file, returning true if the write was successful.
-bool writeStr(const char* filename, const char* str)
-{
-    int fd = open(filename, O_WRONLY);
-    if (fd == -1) {
-        fprintf(stderr, "error opening %s: %s (%d)\n", filename,
-                strerror(errno), errno);
-        return false;
-    }
-
-    bool ok = true;
-    ssize_t len = strlen(str);
-    if (write(fd, str, len) != len) {
-        fprintf(stderr, "error writing to %s: %s (%d)\n", filename,
-                strerror(errno), errno);
-        ok = false;
-    }
-
-    close(fd);
-
-    return ok;
-}
-
-// Enable or disable a kernel option by writing a "1" or a "0" into a /sys file.
-static bool setKernelOptionEnable(const char* filename, bool enable)
-{
-    return writeStr(filename, enable ? "1" : "0");
-}
-
-// Enable or disable a collection of kernel options by writing a "1" or a "0" into each /sys file.
-static bool setMultipleKernelOptionsEnable(const char** filenames, size_t count, bool enable)
-{
-    bool result = true;
-    for (size_t i = 0; i < count; i++) {
-        result &= setKernelOptionEnable(filenames[i], enable);
-    }
-    return result;
-}
-
-// Enable or disable overwriting of the kernel trace buffers.  Disabling this
-// will cause tracing to stop once the trace buffers have filled up.
-static bool setTraceOverwriteEnable(bool enable)
-{
-    return setKernelOptionEnable(k_tracingOverwriteEnablePath, enable);
-}
-
-// Enable or disable tracing of the kernel scheduler switching.
-static bool setSchedSwitchTracingEnable(bool enable)
-{
-    bool ok = true;
-    ok &= setKernelOptionEnable(k_schedSwitchEnablePath, enable);
-    ok &= setKernelOptionEnable(k_schedWakeupEnablePath, enable);
-    return ok;
-}
-
-// Enable or disable tracing of the Bus utilization.
-static bool setBusUtilizationTracingEnable(bool enable)
-{
-    bool ok = true, oneSet = false;
-    // these can be platform specific so make sure that at least
-    // one succeeds.
-    if (fileExists(k_memoryBusEnablePath)) {
-        ok &= setKernelOptionEnable(k_memoryBusEnablePath, enable);
-        oneSet |= ok;
-    }
-    return ok && (oneSet || !enable);
-}
-
-// Enable or disable tracing of the CPU clock frequency.
-static bool setFrequencyTracingEnable(bool enable)
-{
-    bool ok = true;
-    ok &= setKernelOptionEnable(k_cpuFreqEnablePath, enable);
-    if (fileExists(k_clockSetRateEnablePath)) {
-        ok &= setKernelOptionEnable(k_clockSetRateEnablePath, enable);
-    }
-    return ok;
-}
-
-// Enable or disable tracing of CPU idle events.
-static bool setCpuIdleTracingEnable(bool enable)
-{
-    return setKernelOptionEnable(k_cpuIdleEnablePath, enable);
-}
-
-// Enable or disable tracing of the interactive CPU frequency governor's idea of
-// the CPU load.
-static bool setGovernorLoadTracingEnable(bool enable)
-{
-    bool ok = true;
-    if (fileExists(k_governorLoadEnablePath) || enable) {
-        ok &= setKernelOptionEnable(k_governorLoadEnablePath, enable);
-    }
-    return ok;
-}
-
-// Enable or disable tracing of sync timelines and waits.
-static bool setSyncTracingEnabled(bool enable)
-{
-    bool ok = true;
-    if (fileExists(k_syncEnablePath) || enable) {
-        ok &= setKernelOptionEnable(k_syncEnablePath, enable);
-    }
-    return ok;
-}
-
-// Enable or disable tracing of the kernel workqueues.
-static bool setWorkqueueTracingEnabled(bool enable)
-{
-    return setKernelOptionEnable(k_workqueueEnablePath, enable);
-}
-
-// Enable or disable tracing of disk I/O.
-static bool setDiskTracingEnabled(bool enable)
-{
-    return setMultipleKernelOptionsEnable(k_diskEnablePaths, NELEM(k_diskEnablePaths), enable);
-}
-
-// Enable or disable kernel tracing.
-static bool setTracingEnabled(bool enable)
-{
-    return setKernelOptionEnable(k_tracingOnPath, enable);
-}
-
-// Clear the contents of the kernel trace.
-static bool clearTrace()
-{
-    int traceFD = creat(k_tracePath, 0);
-    if (traceFD == -1) {
-        fprintf(stderr, "error truncating %s: %s (%d)\n", k_tracePath,
-                strerror(errno), errno);
-        return false;
-    }
-
-    close(traceFD);
-
-    return true;
-}
-
-// Set the size of the kernel's trace buffer in kilobytes.
-static bool setTraceBufferSizeKB(int size)
-{
-    char str[32] = "1";
-    int len;
-    if (size < 1) {
-        size = 1;
-    }
-    snprintf(str, 32, "%d", size);
-    return writeStr(k_traceBufferSizePath, str);
-}
-
-// Enable or disable the kernel's use of the global clock.  Disabling the global
-// clock will result in the kernel using a per-CPU local clock.
-static bool setGlobalClockEnable(bool enable)
-{
-    return writeStr(k_traceClockPath, enable ? "global" : "local");
-}
-
-// Enable tracing in the kernel.
-static bool startTrace(bool isRoot)
-{
-    bool ok = true;
-
-    // Set up the tracing options that don't require root.
-    ok &= setTraceOverwriteEnable(g_traceOverwrite);
-    ok &= setSchedSwitchTracingEnable(g_traceSchedSwitch);
-    ok &= setFrequencyTracingEnable(g_traceFrequency);
-    ok &= setCpuIdleTracingEnable(g_traceCpuIdle);
-    ok &= setGovernorLoadTracingEnable(g_traceGovernorLoad);
-    ok &= setTraceBufferSizeKB(g_traceBufferSizeKB);
-    ok &= setGlobalClockEnable(true);
-
-    // Set up the tracing options that do require root.  The options that
-    // require root should have errored out earlier if we're not running as
-    // root.
-    if (isRoot) {
-        ok &= setBusUtilizationTracingEnable(g_traceBusUtilization);
-        ok &= setSyncTracingEnabled(g_traceSync);
-        ok &= setWorkqueueTracingEnabled(g_traceWorkqueue);
-        ok &= setDiskTracingEnabled(g_traceDisk);
-    }
-
-    // Enable tracing.
-    ok &= setTracingEnabled(true);
-
-    if (!ok) {
-        fprintf(stderr, "error: unable to start trace\n");
-    }
-
-    return ok;
-}
-
-// Disable tracing in the kernel.
-static void stopTrace(bool isRoot)
-{
-    // Disable tracing.
-    setTracingEnabled(false);
-
-    // Set the options back to their defaults.
-    setTraceOverwriteEnable(true);
-    setSchedSwitchTracingEnable(false);
-    setFrequencyTracingEnable(false);
-    setGovernorLoadTracingEnable(false);
-    setGlobalClockEnable(false);
-
-    if (isRoot) {
-        setBusUtilizationTracingEnable(false);
-        setSyncTracingEnabled(false);
-        setWorkqueueTracingEnabled(false);
-        setDiskTracingEnabled(false);
-    }
-
-    // Note that we can't reset the trace buffer size here because that would
-    // clear the trace before we've read it.
-}
-
-// Read the current kernel trace and write it to stdout.
-static void dumpTrace()
-{
-    int traceFD = open(k_tracePath, O_RDWR);
-    if (traceFD == -1) {
-        fprintf(stderr, "error opening %s: %s (%d)\n", k_tracePath,
-                strerror(errno), errno);
-        return;
-    }
-
-    if (g_compress) {
-        z_stream zs;
-        uint8_t *in, *out;
-        int result, flush;
-
-        bzero(&zs, sizeof(zs));
-        result = deflateInit(&zs, Z_DEFAULT_COMPRESSION);
-        if (result != Z_OK) {
-            fprintf(stderr, "error initializing zlib: %d\n", result);
-            close(traceFD);
-            return;
-        }
-
-        const size_t bufSize = 64*1024;
-        in = (uint8_t*)malloc(bufSize);
-        out = (uint8_t*)malloc(bufSize);
-        flush = Z_NO_FLUSH;
-
-        zs.next_out = out;
-        zs.avail_out = bufSize;
-
-        do {
-
-            if (zs.avail_in == 0) {
-                // More input is needed.
-                result = read(traceFD, in, bufSize);
-                if (result < 0) {
-                    fprintf(stderr, "error reading trace: %s (%d)\n",
-                            strerror(errno), errno);
-                    result = Z_STREAM_END;
-                    break;
-                } else if (result == 0) {
-                    flush = Z_FINISH;
-                } else {
-                    zs.next_in = in;
-                    zs.avail_in = result;
-                }
-            }
-
-            if (zs.avail_out == 0) {
-                // Need to write the output.
-                result = write(STDOUT_FILENO, out, bufSize);
-                if ((size_t)result < bufSize) {
-                    fprintf(stderr, "error writing deflated trace: %s (%d)\n",
-                            strerror(errno), errno);
-                    result = Z_STREAM_END; // skip deflate error message
-                    zs.avail_out = bufSize; // skip the final write
-                    break;
-                }
-                zs.next_out = out;
-                zs.avail_out = bufSize;
-            }
-
-        } while ((result = deflate(&zs, flush)) == Z_OK);
-
-        if (result != Z_STREAM_END) {
-            fprintf(stderr, "error deflating trace: %s\n", zs.msg);
-        }
-
-        if (zs.avail_out < bufSize) {
-            size_t bytes = bufSize - zs.avail_out;
-            result = write(STDOUT_FILENO, out, bytes);
-            if ((size_t)result < bytes) {
-                fprintf(stderr, "error writing deflated trace: %s (%d)\n",
-                        strerror(errno), errno);
-            }
-        }
-
-        result = deflateEnd(&zs);
-        if (result != Z_OK) {
-            fprintf(stderr, "error cleaning up zlib: %d\n", result);
-        }
-
-        free(in);
-        free(out);
-    } else {
-        ssize_t sent = 0;
-        while ((sent = sendfile(STDOUT_FILENO, traceFD, NULL, 64*1024*1024)) > 0);
-        if (sent == -1) {
-            fprintf(stderr, "error dumping trace: %s (%d)\n", strerror(errno),
-                    errno);
-        }
-    }
-
-    close(traceFD);
-}
-
-// Print the command usage help to stderr.
-static void showHelp(const char *cmd)
-{
-    fprintf(stderr, "usage: %s [options]\n", cmd);
-    fprintf(stderr, "options include:\n"
-                    "  -b N            use a trace buffer size of N KB\n"
-                    "  -c              trace into a circular buffer\n"
-                    "  -d              trace disk I/O\n"
-                    "  -f              trace clock frequency changes\n"
-                    "  -l              trace CPU frequency governor load\n"
-                    "  -s              trace the kernel scheduler switches\n"
-                    "  -t N            trace for N seconds [defualt 5]\n"
-                    "  -u              trace bus utilization\n"
-                    "  -w              trace the kernel workqueue\n"
-                    "  -y              trace sync timelines and waits\n"
-                    "  -z              compress the trace dump\n"
-                    "  --async_start   start circular trace and return immediatly\n"
-                    "  --async_dump    dump the current contents of circular trace buffer\n"
-                    "  --async_stop    stop tracing and dump the current contents of circular\n"
-                    "                    trace buffer\n"
-            );
-}
-
-static void handleSignal(int signo) {
-    if (!g_nohup) {
-        g_traceAborted = true;
-    }
-}
-
-static void registerSigHandler() {
-    struct sigaction sa;
-    sigemptyset(&sa.sa_mask);
-    sa.sa_flags = 0;
-    sa.sa_handler = handleSignal;
-    sigaction(SIGHUP, &sa, NULL);
-    sigaction(SIGINT, &sa, NULL);
-    sigaction(SIGQUIT, &sa, NULL);
-    sigaction(SIGTERM, &sa, NULL);
-}
-
-int main(int argc, char **argv)
-{
-    bool isRoot = (getuid() == 0);
-    bool async = false;
-    bool traceStart = true;
-    bool traceStop = true;
-    bool traceDump = true;
-
-    if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
-        showHelp(argv[0]);
-        exit(0);
-    }
-
-    for (;;) {
-        int ret;
-        int option_index = 0;
-        static struct option long_options[] = {
-            {"async_start",     no_argument, 0,  0 },
-            {"async_stop",      no_argument, 0,  0 },
-            {"async_dump",      no_argument, 0,  0 },
-            {0,         0,                 0,  0 }
-        };
-
-        ret = getopt_long(argc, argv, "b:cidflst:uwyznS:",
-                          long_options, &option_index);
-
-        if (ret < 0) {
-            break;
-        }
-
-        switch(ret) {
-            case 'b':
-                g_traceBufferSizeKB = atoi(optarg);
-            break;
-
-            case 'c':
-                g_traceOverwrite = true;
-            break;
-
-            case 'i':
-                g_traceCpuIdle = true;
-            break;
-
-            case 'l':
-                g_traceGovernorLoad = true;
-            break;
-
-            case 'd':
-                if (!isRoot) {
-                    fprintf(stderr, "error: tracing disk activity requires root privileges\n");
-                    exit(1);
-                }
-                g_traceDisk = true;
-            break;
-
-            case 'f':
-                g_traceFrequency = true;
-            break;
-
-            case 'n':
-                g_nohup = true;
-                break;
-
-            case 's':
-                g_traceSchedSwitch = true;
-            break;
-
-            case 'S':
-                g_initialSleepSecs = atoi(optarg);
-            break;
-
-            case 't':
-                g_traceDurationSeconds = atoi(optarg);
-            break;
-
-            case 'u':
-                if (!isRoot) {
-                    fprintf(stderr, "error: tracing bus utilization requires root privileges\n");
-                    exit(1);
-                }
-                g_traceBusUtilization = true;
-            break;
-
-            case 'w':
-                if (!isRoot) {
-                    fprintf(stderr, "error: tracing kernel work queues requires root privileges\n");
-                    exit(1);
-                }
-                g_traceWorkqueue = true;
-            break;
-
-            case 'y':
-                if (!isRoot) {
-                    fprintf(stderr, "error: tracing sync requires root privileges\n");
-                    exit(1);
-                }
-                g_traceSync = true;
-            break;
-
-            case 'z':
-                g_compress = true;
-            break;
-
-            case 0:
-                if (!strcmp(long_options[option_index].name, "async_start")) {
-                    async = true;
-                    traceStop = false;
-                    traceDump = false;
-                    g_traceOverwrite = true;
-                } else if (!strcmp(long_options[option_index].name, "async_stop")) {
-                    async = true;
-                    traceStop = false;
-                } else if (!strcmp(long_options[option_index].name, "async_dump")) {
-                    async = true;
-                    traceStart = false;
-                    traceStop = false;
-                }
-                break;
-
-            default:
-                fprintf(stderr, "\n");
-                showHelp(argv[0]);
-                exit(-1);
-            break;
-        }
-    }
-
-    registerSigHandler();
-
-    if (g_initialSleepSecs > 0) {
-        sleep(g_initialSleepSecs);
-    }
-
-    bool ok = startTrace(isRoot);
-
-    if (ok && traceStart) {
-        printf("capturing trace...");
-        fflush(stdout);
-
-        // We clear the trace after starting it because tracing gets enabled for
-        // each CPU individually in the kernel. Having the beginning of the trace
-        // contain entries from only one CPU can cause "begin" entries without a
-        // matching "end" entry to show up if a task gets migrated from one CPU to
-        // another.
-        ok = clearTrace();
-
-        if (ok && !async) {
-            // Sleep to allow the trace to be captured.
-            struct timespec timeLeft;
-            timeLeft.tv_sec = g_traceDurationSeconds;
-            timeLeft.tv_nsec = 0;
-            do {
-                if (g_traceAborted) {
-                    break;
-                }
-            } while (nanosleep(&timeLeft, &timeLeft) == -1 && errno == EINTR);
-        }
-    }
-
-    // Stop the trace and restore the default settings.
-    if (traceStop)
-        stopTrace(isRoot);
-
-    if (ok && traceDump) {
-        if (!g_traceAborted) {
-            printf(" done\nTRACE:\n");
-            fflush(stdout);
-            dumpTrace();
-        } else {
-            printf("\ntrace aborted.\n");
-            fflush(stdout);
-        }
-        clearTrace();
-    } else if (!ok) {
-        fprintf(stderr, "unable to start tracing\n");
-    }
-
-    // Reset the trace buffer size to 1.
-    if (traceStop)
-        setTraceBufferSizeKB(1);
-
-    return g_traceAborted ? 1 : 0;
-}