aboutsummaryrefslogtreecommitdiff
path: root/daemon/ConfigurationXML.cpp
blob: be224a4f2b1f7d453a5704d06e28b23ace61eb25 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
/**
 * Copyright (C) ARM Limited 2010-2015. 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 "ConfigurationXML.h"

#include <string.h>
#include <stdlib.h>
#include <dirent.h>

#include "Driver.h"
#include "Logging.h"
#include "OlyUtility.h"
#include "SessionData.h"

static const char* ATTR_COUNTER            = "counter";
static const char* ATTR_REVISION           = "revision";
static const char* ATTR_EVENT              = "event";
static const char* ATTR_COUNT              = "count";
static const char* ATTR_CORES              = "cores";

ConfigurationXML::ConfigurationXML() {
	const char * configuration_xml;
	unsigned int configuration_xml_len;
	getDefaultConfigurationXml(configuration_xml, configuration_xml_len);

	char path[PATH_MAX];

	getPath(path);
	mConfigurationXML = util->readFromDisk(path);

	for (int retryCount = 0; retryCount < 2; ++retryCount) {
		if (mConfigurationXML == NULL) {
			logg->logMessage("Unable to locate configuration.xml, using default in binary");
			// null-terminate configuration_xml
			mConfigurationXML = (char*)malloc(configuration_xml_len + 1);
			memcpy(mConfigurationXML, (const void*)configuration_xml, configuration_xml_len);
			mConfigurationXML[configuration_xml_len] = 0;
		}

		int ret = parse(mConfigurationXML);
		if (ret == 1) {
			remove();

			// Free the current configuration and reload
			free((void*)mConfigurationXML);
			mConfigurationXML = NULL;
			continue;
		}

		break;
	}

	validate();
}

ConfigurationXML::~ConfigurationXML() {
	if (mConfigurationXML) {
		free((void*)mConfigurationXML);
	}
}

int ConfigurationXML::parse(const char* configurationXML) {
	mxml_node_t *tree, *node;
	int ret;

	// clear counter overflow
	gSessionData->mCounterOverflow = 0;
	gSessionData->mIsEBS = false;
	mIndex = 0;

	// disable all counters prior to parsing the configuration xml
	for (int i = 0; i < MAX_PERFORMANCE_COUNTERS; i++) {
		gSessionData->mCounters[i].setEnabled(false);
	}

	tree = mxmlLoadString(NULL, configurationXML, MXML_NO_CALLBACK);

	node = mxmlGetFirstChild(tree);
	while (node && mxmlGetType(node) != MXML_ELEMENT)
		node = mxmlWalkNext(node, tree, MXML_NO_DESCEND);

	ret = configurationsTag(node);

	node = mxmlGetFirstChild(node);
	while (node) {
		if (mxmlGetType(node) != MXML_ELEMENT) {
			node = mxmlWalkNext(node, tree, MXML_NO_DESCEND);
			continue;
		}
		configurationTag(node);
		node = mxmlWalkNext(node, tree, MXML_NO_DESCEND);
	}

	mxmlDelete(tree);

	return ret;
}

void ConfigurationXML::validate(void) {
	for (int i = 0; i < MAX_PERFORMANCE_COUNTERS; i++) {
		const Counter & counter = gSessionData->mCounters[i];
		if (counter.isEnabled()) {
			if (strcmp(counter.getType(), "") == 0) {
				logg->logError("Invalid required attribute in configuration.xml:\n  counter=\"%s\"\n  event=%d\n", counter.getType(), counter.getEvent());
				handleException();
			}

			// iterate through the remaining enabled performance counters
			for (int j = i + 1; j < MAX_PERFORMANCE_COUNTERS; j++) {
				const Counter & counter2 = gSessionData->mCounters[j];
				if (counter2.isEnabled()) {
					// check if the types are the same
					if (strcmp(counter.getType(), counter2.getType()) == 0) {
						logg->logError("Duplicate performance counter type in configuration.xml: %s", counter.getType());
						handleException();
					}
				}
			}
		}
	}
}

#define CONFIGURATION_REVISION 3
int ConfigurationXML::configurationsTag(mxml_node_t *node) {
	const char* revision_string;

	revision_string = mxmlElementGetAttr(node, ATTR_REVISION);
	if (!revision_string) {
		return 1; //revision issue;
	}

	int revision = strtol(revision_string, NULL, 10);
	if (revision < CONFIGURATION_REVISION) {
		return 1; // revision issue
	}

	// A revision >= CONFIGURATION_REVISION is okay
	// Greater than can occur when Streamline is newer than gator

	return 0;
}

void ConfigurationXML::configurationTag(mxml_node_t *node) {
	// handle all other performance counters
	if (mIndex >= MAX_PERFORMANCE_COUNTERS) {
		mIndex++;
		gSessionData->mCounterOverflow = mIndex;
		return;
	}

	// read attributes
	Counter & counter = gSessionData->mCounters[mIndex];
	counter.clear();
	if (mxmlElementGetAttr(node, ATTR_COUNTER)) counter.setType(mxmlElementGetAttr(node, ATTR_COUNTER));
	if (mxmlElementGetAttr(node, ATTR_EVENT)) counter.setEvent(strtol(mxmlElementGetAttr(node, ATTR_EVENT), NULL, 16));
	if (mxmlElementGetAttr(node, ATTR_COUNT)) counter.setCount(strtol(mxmlElementGetAttr(node, ATTR_COUNT), NULL, 10));
	if (mxmlElementGetAttr(node, ATTR_CORES)) counter.setCores(strtol(mxmlElementGetAttr(node, ATTR_CORES), NULL, 10));
	if (counter.getCount() > 0) {
		gSessionData->mIsEBS = true;
	}
	counter.setEnabled(true);

	// Associate a driver with each counter
	for (Driver *driver = Driver::getHead(); driver != NULL; driver = driver->getNext()) {
		if (driver->claimCounter(counter)) {
			if (counter.getDriver() != NULL) {
				logg->logError("More than one driver has claimed %s:%i", counter.getType(), counter.getEvent());
				handleException();
			}
			counter.setDriver(driver);
		}
	}

	// If no driver is associated with the counter, disable it
	if (counter.getDriver() == NULL) {
		logg->logMessage("No driver has claimed %s:%i", counter.getType(), counter.getEvent());
		counter.setEnabled(false);
	}

	if (counter.isEnabled()) {
		// update counter index
		mIndex++;
	}
}

void ConfigurationXML::getDefaultConfigurationXml(const char * & xml, unsigned int & len) {
#include "defaults_xml.h" // defines and initializes char defaults_xml[] and int defaults_xml_len
	xml = (const char *)defaults_xml;
	len = defaults_xml_len;
}

void ConfigurationXML::getPath(char* path) {
	if (gSessionData->mConfigurationXMLPath) {
		strncpy(path, gSessionData->mConfigurationXMLPath, PATH_MAX);
	} else {
		if (util->getApplicationFullPath(path, PATH_MAX) != 0) {
			logg->logMessage("Unable to determine the full path of gatord, the cwd will be used");
		}
		strncat(path, "configuration.xml", PATH_MAX - strlen(path) - 1);
	}
}

void ConfigurationXML::remove() {
	char path[PATH_MAX];
	getPath(path);

	if (::remove(path) != 0) {
		logg->logError("Invalid configuration.xml file detected and unable to delete it. To resolve, delete configuration.xml on disk");
		handleException();
	}
	logg->logMessage("Invalid configuration.xml file detected and removed");
}