diff options
| -rw-r--r-- | atrace/Android.mk | 12 | ||||
| -rw-r--r-- | atrace/MODULE_LICENSE_APACHE2 | 0 | ||||
| -rw-r--r-- | atrace/NOTICE | 190 | ||||
| -rw-r--r-- | atrace/atrace.c | 304 |
4 files changed, 0 insertions, 506 deletions
diff --git a/atrace/Android.mk b/atrace/Android.mk deleted file mode 100644 index b6c55d4..0000000 --- a/atrace/Android.mk +++ /dev/null @@ -1,12 +0,0 @@ -# Copyright 2012 The Android Open Source Project - -LOCAL_PATH:= $(call my-dir) -include $(CLEAR_VARS) - -LOCAL_SRC_FILES:= atrace.c - -LOCAL_MODULE:= atrace - -LOCAL_MODULE_TAGS:= optional - -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 3d2a52e..0000000 --- a/atrace/atrace.c +++ /dev/null @@ -1,304 +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> - -/* Command line options */ -static int g_traceDurationSeconds = 5; -static bool g_traceSchedSwitch = false; -static bool g_traceWorkqueue = false; -static bool g_traceOverwrite = false; - -/* 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_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_workqueueEnablePath = - "/sys/kernel/debug/tracing/events/workqueue/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"; - -// 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 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) -{ - return setKernelOptionEnable(k_schedSwitchEnablePath, enable); -} - -// Enable or disable tracing of the kernel workqueues. -static bool setWorkqueueTracingEnabled(bool enable) -{ - return setKernelOptionEnable(k_workqueueEnablePath, 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; -} - -// 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 ok = true; - - // Set up the tracing options. - ok &= setTraceOverwriteEnable(g_traceOverwrite); - ok &= setSchedSwitchTracingEnable(g_traceSchedSwitch); - ok &= setWorkqueueTracingEnabled(g_traceWorkqueue); - ok &= setGlobalClockEnable(true); - - // 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() -{ - // Disable tracing. - setTracingEnabled(false); - - // Set the options back to their defaults. - setTraceOverwriteEnable(true); - setSchedSwitchTracingEnable(false); - setWorkqueueTracingEnabled(false); - setGlobalClockEnable(false); -} - -// 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; - } - - 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" - " -c trace into a circular buffer\n" - " -s trace the kernel scheduler switches\n" - " -t N trace for N seconds [defualt 5]\n" - " -w trace the kernel workqueue\n"); -} - -static void handleSignal(int signo) { - 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) -{ - if (argc == 2 && 0 == strcmp(argv[1], "--help")) { - showHelp(argv[0]); - exit(0); - } - - if (getuid() != 0) { - fprintf(stderr, "error: %s must be run as root.", argv[0]); - } - - for (;;) { - int ret; - - ret = getopt(argc, argv, "cst:w"); - - if (ret < 0) { - break; - } - - switch(ret) { - case 'c': - g_traceOverwrite = true; - break; - - case 's': - g_traceSchedSwitch = true; - break; - - case 't': - g_traceDurationSeconds = atoi(optarg); - break; - - case 'w': - g_traceWorkqueue = true; - break; - - default: - showHelp(argv[0]); - exit(-1); - break; - } - } - - registerSigHandler(); - - bool ok = startTrace(); - - 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(); - - 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"); - } - - return g_traceAborted ? 1 : 0; -} |