am 066c268b: (-s ours) am da068042: Reconcile with jb-mr1-release - do not merge
* commit '066c268bb596d7188091278e92638575765e6e98':
make_ext4fs: fix dentry padding when dentry size is 4088 or 4092
diff --git a/atrace/Android.mk b/atrace/Android.mk
deleted file mode 100644
index 12526d0..0000000
--- 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 e69de29..0000000
--- a/atrace/MODULE_LICENSE_APACHE2
+++ /dev/null
diff --git a/atrace/NOTICE b/atrace/NOTICE
deleted file mode 100644
index c77f135..0000000
--- 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 2d9b4f8..0000000
--- a/atrace/atrace.c
+++ /dev/null
@@ -1,607 +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 <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");
-}
-
-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);
-
- if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
- showHelp(argv[0]);
- exit(0);
- }
-
- for (;;) {
- int ret;
-
- ret = getopt(argc, argv, "b:cidflst:uwyznS:");
-
- 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;
-
- default:
- fprintf(stderr, "\n");
- showHelp(argv[0]);
- exit(-1);
- break;
- }
- }
-
- registerSigHandler();
-
- if (g_initialSleepSecs > 0) {
- sleep(g_initialSleepSecs);
- }
-
- bool ok = startTrace(isRoot);
-
- if (ok) {
- 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) {
- // 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.
- stopTrace(isRoot);
-
- if (ok) {
- if (!g_traceAborted) {
- printf(" done\nTRACE:\n");
- fflush(stdout);
- dumpTrace();
- } else {
- printf("\ntrace aborted.\n");
- fflush(stdout);
- }
- clearTrace();
- } else {
- fprintf(stderr, "unable to start tracing\n");
- }
-
- // Reset the trace buffer size to 1.
- setTraceBufferSizeKB(1);
-
- return g_traceAborted ? 1 : 0;
-}
