rk: revert to v3.10

[firefly-linux-kernel-4.4.55.git] / tools / gator / daemon / FtraceDriver.cpp

diff --git a/tools/gator/daemon/FtraceDriver.cpp b/tools/gator/daemon/FtraceDriver.cpp
deleted file mode 100644 (file)
index 98bd0a5..0000000
--- a/tools/gator/daemon/FtraceDriver.cpp
+++ /dev/null
@@ -1,195 +0,0 @@
-/**
- * Copyright (C) ARM Limited 2014-2015. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include "FtraceDriver.h"
-
-#include <regex.h>
-#include <unistd.h>
-
-#include "DriverSource.h"
-#include "Logging.h"
-#include "Setup.h"
-
-class FtraceCounter : public DriverCounter {
-public:
-       FtraceCounter(DriverCounter *next, char *name, const char *regex, const char *enable);
-       ~FtraceCounter();
-
-       void prepare();
-       int read(const char *const line, int64_t *values);
-       void stop();
-
-private:
-       regex_t mReg;
-       char *const mEnable;
-       int mWasEnabled;
-
-       // Intentionally unimplemented
-       FtraceCounter(const FtraceCounter &);
-       FtraceCounter &operator=(const FtraceCounter &);
-};
-
-FtraceCounter::FtraceCounter(DriverCounter *next, char *name, const char *regex, const char *enable) : DriverCounter(next, name), mEnable(enable == NULL ? NULL : strdup(enable)) {
-       int result = regcomp(&mReg, regex, REG_EXTENDED);
-       if (result != 0) {
-               char buf[128];
-               regerror(result, &mReg, buf, sizeof(buf));
-               logg->logError("Invalid regex '%s': %s", regex, buf);
-               handleException();
-       }
-}
-
-FtraceCounter::~FtraceCounter() {
-       regfree(&mReg);
-       if (mEnable != NULL) {
-               free(mEnable);
-       }
-}
-
-void FtraceCounter::prepare() {
-       if (mEnable == NULL) {
-               return;
-       }
-
-       char buf[1<<10];
-       snprintf(buf, sizeof(buf), "/sys/kernel/debug/tracing/events/%s/enable", mEnable);
-       if ((DriverSource::readIntDriver(buf, &mWasEnabled) != 0) ||
-                       (DriverSource::writeDriver(buf, 1) != 0)) {
-               logg->logError("Unable to read or write to %s", buf);
-               handleException();
-       }
-}
-
-int FtraceCounter::read(const char *const line, int64_t *values) {
-       regmatch_t match[2];
-       int result = regexec(&mReg, line, 2, match, 0);
-       if (result != 0) {
-               // No match
-               return 0;
-       }
-
-       int64_t value;
-       if (match[1].rm_so < 0) {
-               value = 1;
-       } else {
-               errno = 0;
-               value = strtoll(line + match[1].rm_so, NULL, 0);
-               if (errno != 0) {
-                       logg->logError("Parsing %s failed: %s", getName(), strerror(errno));
-                       handleException();
-               }
-       }
-
-       values[0] = getKey();
-       values[1] = value;
-
-       return 1;
-}
-
-void FtraceCounter::stop() {
-       if (mEnable == NULL) {
-               return;
-       }
-
-       char buf[1<<10];
-       snprintf(buf, sizeof(buf), "/sys/kernel/debug/tracing/events/%s/enable", mEnable);
-       DriverSource::writeDriver(buf, mWasEnabled);
-}
-
-FtraceDriver::FtraceDriver() : mValues(NULL) {
-}
-
-FtraceDriver::~FtraceDriver() {
-       delete [] mValues;
-}
-
-void FtraceDriver::readEvents(mxml_node_t *const xml) {
-       // Check the kernel version
-       int release[3];
-       if (!getLinuxVersion(release)) {
-               logg->logError("getLinuxVersion failed");
-               handleException();
-       }
-
-       // The perf clock was added in 3.10
-       if (KERNEL_VERSION(release[0], release[1], release[2]) < KERNEL_VERSION(3, 10, 0)) {
-               logg->logMessage("Unsupported kernel version, to use ftrace please upgrade to Linux 3.10 or later");
-               return;
-       }
-
-       mxml_node_t *node = xml;
-       int count = 0;
-       while (true) {
-               node = mxmlFindElement(node, xml, "event", NULL, NULL, MXML_DESCEND);
-               if (node == NULL) {
-                       break;
-               }
-               const char *counter = mxmlElementGetAttr(node, "counter");
-               if (counter == NULL) {
-                       continue;
-               }
-
-               if (strncmp(counter, "ftrace_", 7) != 0) {
-                       continue;
-               }
-
-               const char *regex = mxmlElementGetAttr(node, "regex");
-               if (regex == NULL) {
-                       logg->logError("The regex counter %s is missing the required regex attribute", counter);
-                       handleException();
-               }
-               bool addCounter = true;
-               const char *enable = mxmlElementGetAttr(node, "enable");
-               if (enable != NULL) {
-                       char buf[1<<10];
-                       snprintf(buf, sizeof(buf), "/sys/kernel/debug/tracing/events/%s/enable", enable);
-                       if (access(buf, W_OK) != 0) {
-                               logg->logMessage("Disabling counter %s, %s not found", counter, buf);
-                               addCounter = false;
-                       }
-               }
-               if (addCounter) {
-                       setCounters(new FtraceCounter(getCounters(), strdup(counter), regex, enable));
-                       ++count;
-               }
-       }
-
-       mValues = new int64_t[2*count];
-}
-
-void FtraceDriver::prepare() {
-       for (FtraceCounter *counter = static_cast<FtraceCounter *>(getCounters()); counter != NULL; counter = static_cast<FtraceCounter *>(counter->getNext())) {
-               if (!counter->isEnabled()) {
-                       continue;
-               }
-               counter->prepare();
-       }
-}
-
-int FtraceDriver::read(const char *line, int64_t **buf) {
-       int count = 0;
-
-       for (FtraceCounter *counter = static_cast<FtraceCounter *>(getCounters()); counter != NULL; counter = static_cast<FtraceCounter *>(counter->getNext())) {
-               if (!counter->isEnabled()) {
-                       continue;
-               }
-               count += counter->read(line, mValues + 2*count);
-       }
-
-       *buf = mValues;
-       return count;
-}
-
-void FtraceDriver::stop() {
-       for (FtraceCounter *counter = static_cast<FtraceCounter *>(getCounters()); counter != NULL; counter = static_cast<FtraceCounter *>(counter->getNext())) {
-               if (!counter->isEnabled()) {
-                       continue;
-               }
-               counter->stop();
-       }
-}