1 | /* |
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2 | ------------------------------------------------------------------------ |
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3 | |
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4 | Copyright Objective Design Systems Pty Ltd, 2002 |
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5 | All rights reserved Objective Design Systems Pty Ltd, 2002 |
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6 | Chris Johns (ccj@acm.org) |
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7 | |
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8 | COPYRIGHT (c) 1989-2014. |
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9 | On-Line Applications Research Corporation (OAR). |
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10 | |
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11 | The license and distribution terms for this file may be |
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12 | found in the file LICENSE in this distribution. |
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13 | |
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14 | This software with is provided ``as is'' and with NO WARRANTY. |
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15 | |
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16 | ------------------------------------------------------------------------ |
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17 | |
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18 | RTEMS Performance Monitoring and Measurement Framework. |
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19 | |
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20 | This is the Capture Engine component. |
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21 | |
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22 | */ |
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23 | |
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24 | #ifdef HAVE_CONFIG_H |
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25 | #include "config.h" |
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26 | #endif |
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27 | |
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28 | #include <stdlib.h> |
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29 | #include <string.h> |
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30 | |
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31 | #include "captureimpl.h" |
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32 | #include "capture_buffer.h" |
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33 | |
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34 | /* |
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35 | * These events are always recorded and are not part of the |
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36 | * watch filters. |
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37 | * |
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38 | * This feature has been disabled as it becomes confusing when |
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39 | * setting up filters and some event leak. |
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40 | */ |
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41 | #if defined (RTEMS_CAPTURE_ENGINE_ALLOW_RELATED_EVENTS) |
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42 | #define RTEMS_CAPTURE_RECORD_EVENTS (RTEMS_CAPTURE_CREATED_BY_EVENT | \ |
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43 | RTEMS_CAPTURE_CREATED_EVENT | \ |
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44 | RTEMS_CAPTURE_STARTED_BY_EVENT | \ |
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45 | RTEMS_CAPTURE_STARTED_EVENT | \ |
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46 | RTEMS_CAPTURE_RESTARTED_BY_EVENT | \ |
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47 | RTEMS_CAPTURE_RESTARTED_EVENT | \ |
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48 | RTEMS_CAPTURE_DELETED_BY_EVENT | \ |
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49 | RTEMS_CAPTURE_DELETED_EVENT | \ |
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50 | RTEMS_CAPTURE_BEGIN_EVENT | \ |
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51 | RTEMS_CAPTURE_EXITTED_EVENT | \ |
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52 | RTEMS_CAPTURE_TERMINATED_EVENT | \ |
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53 | RTEMS_CAPTURE_AUTOGEN_ENTRY_EVENT | \ |
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54 | RTEMS_CAPTURE_AUTOGEN_EXIT_EVENT) |
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55 | #else |
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56 | #define RTEMS_CAPTURE_RECORD_EVENTS (0) |
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57 | #endif |
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58 | |
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59 | typedef struct { |
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60 | rtems_capture_buffer_t records; |
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61 | uint32_t count; |
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62 | rtems_id reader; |
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63 | rtems_interrupt_lock lock; |
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64 | uint32_t flags; |
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65 | } rtems_capture_per_cpu_data; |
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66 | |
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67 | typedef struct { |
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68 | uint32_t flags; |
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69 | rtems_capture_control_t* controls; |
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70 | int extension_index; |
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71 | rtems_capture_timestamp timestamp; |
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72 | rtems_task_priority ceiling; |
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73 | rtems_task_priority floor; |
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74 | rtems_interrupt_lock lock; |
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75 | } rtems_capture_global_data; |
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76 | |
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77 | static rtems_capture_per_cpu_data *capture_per_cpu = NULL; |
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78 | |
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79 | static rtems_capture_global_data capture_global = { |
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80 | .lock = RTEMS_INTERRUPT_LOCK_INITIALIZER( "Capture" ) |
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81 | }; |
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82 | |
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83 | /* |
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84 | * RTEMS Capture Data. |
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85 | */ |
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86 | #define capture_per_cpu_get( _cpu ) \ |
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87 | ( &capture_per_cpu[ _cpu ] ) |
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88 | |
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89 | #define capture_records_on_cpu( _cpu ) capture_per_cpu[ _cpu ].records |
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90 | #define capture_count_on_cpu( _cpu ) capture_per_cpu[ _cpu ].count |
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91 | #define capture_flags_on_cpu( _cpu ) capture_per_cpu[ _cpu ].flags |
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92 | #define capture_reader_on_cpu( _cpu ) capture_per_cpu[ _cpu ].reader |
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93 | #define capture_lock_on_cpu( _cpu ) capture_per_cpu[ _cpu ].lock |
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94 | |
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95 | #define capture_flags_global capture_global.flags |
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96 | #define capture_controls capture_global.controls |
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97 | #define capture_extension_index capture_global.extension_index |
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98 | #define capture_timestamp capture_global.timestamp |
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99 | #define capture_ceiling capture_global.ceiling |
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100 | #define capture_floor capture_global.floor |
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101 | #define capture_lock_global capture_global.lock |
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102 | |
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103 | /* |
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104 | * RTEMS Event text. |
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105 | */ |
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106 | static const char * const capture_event_text[] = |
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107 | { |
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108 | "CREATED_BY", |
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109 | "CREATED", |
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110 | "STARTED_BY", |
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111 | "STARTED", |
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112 | "RESTARTED_BY", |
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113 | "RESTARTED", |
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114 | "DELETED_BY", |
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115 | "DELETED", |
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116 | "TERMINATED", |
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117 | "BEGIN", |
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118 | "EXITTED", |
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119 | "SWITCHED_OUT", |
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120 | "SWITCHED_IN", |
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121 | "TIMESTAMP" |
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122 | }; |
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123 | |
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124 | void rtems_capture_set_extension_index(int index) |
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125 | { |
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126 | capture_extension_index = index; |
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127 | } |
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128 | |
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129 | int rtems_capture_get_extension_index(void) |
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130 | { |
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131 | return capture_extension_index; |
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132 | } |
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133 | |
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134 | uint32_t rtems_capture_get_flags(void) |
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135 | { |
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136 | return capture_flags_global; |
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137 | } |
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138 | |
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139 | void rtems_capture_set_flags(uint32_t mask) |
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140 | { |
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141 | capture_flags_global |= mask; |
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142 | } |
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143 | |
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144 | /* |
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145 | * This function returns the current time. If a handler is provided |
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146 | * by the user get the time from that. |
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147 | */ |
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148 | void |
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149 | rtems_capture_get_time (rtems_capture_time_t* time) |
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150 | { |
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151 | if (capture_timestamp) |
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152 | capture_timestamp (time); |
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153 | else |
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154 | { |
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155 | *time = rtems_clock_get_uptime_nanoseconds (); |
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156 | } |
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157 | } |
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158 | |
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159 | /* |
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160 | * This function compares rtems_names. It protects the |
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161 | * capture engine from a change to the way names are supported |
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162 | * in RTEMS. |
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163 | */ |
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164 | static inline bool |
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165 | rtems_capture_match_names (rtems_name lhs, rtems_name rhs) |
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166 | { |
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167 | return lhs == rhs; |
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168 | } |
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169 | |
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170 | /* |
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171 | * This function compares rtems_ids. It protects the |
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172 | * capture engine from a change to the way id are supported |
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173 | * in RTEMS. |
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174 | */ |
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175 | static inline bool |
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176 | rtems_capture_match_ids (rtems_id lhs, rtems_id rhs) |
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177 | { |
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178 | return lhs == rhs; |
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179 | } |
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180 | |
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181 | /* |
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182 | * This function matches a name and/or id. |
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183 | */ |
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184 | static inline bool |
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185 | rtems_capture_match_name_id (rtems_name lhs_name, |
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186 | rtems_id lhs_id, |
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187 | rtems_name rhs_name, |
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188 | rtems_id rhs_id) |
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189 | { |
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190 | /* |
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191 | * The left hand side name or id could be 0 which means a wildcard. |
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192 | */ |
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193 | if ((lhs_name == 0) && (lhs_id == rhs_id)) |
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194 | return 1; |
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195 | else if ((lhs_id == 0) || (lhs_id == rhs_id)) |
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196 | { |
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197 | if (rtems_capture_match_names (lhs_name, rhs_name)) |
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198 | return 1; |
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199 | } |
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200 | return 0; |
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201 | } |
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202 | |
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203 | /* |
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204 | * This function duplicates an rtems_names. It protects the |
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205 | * capture engine from a change to the way names are supported |
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206 | * in RTEMS. |
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207 | */ |
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208 | static inline void |
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209 | rtems_capture_dup_name (rtems_name* dst, rtems_name src) |
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210 | { |
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211 | *dst = src; |
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212 | } |
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213 | |
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214 | /* |
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215 | * This function sees if a BY control is in the BY names. The use |
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216 | * of the valid_mask in this way assumes the number of trigger |
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217 | * tasks is the number of bits in uint32_t. |
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218 | */ |
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219 | static inline bool |
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220 | rtems_capture_by_in_to (uint32_t events, |
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221 | rtems_tcb* by, |
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222 | rtems_capture_control_t* to) |
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223 | { |
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224 | uint32_t valid_mask = RTEMS_CAPTURE_CONTROL_FROM_MASK (0); |
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225 | uint32_t valid_remainder = 0xffffffff; |
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226 | int i; |
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227 | |
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228 | for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) |
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229 | { |
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230 | /* |
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231 | * If there are no more valid BY entries then |
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232 | * we are finished. |
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233 | */ |
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234 | if ((valid_remainder & to->by_valid) == 0) |
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235 | break; |
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236 | |
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237 | /* |
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238 | * Is the froby entry valid and does its name or id match. |
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239 | */ |
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240 | if ((valid_mask & to->by_valid) && |
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241 | (to->by[i].trigger & events)) |
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242 | { |
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243 | /* |
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244 | * We have the BY task on the right hand side so we |
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245 | * match with id's first then labels if the id's are |
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246 | * not set. |
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247 | */ |
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248 | if (rtems_capture_match_name_id (to->by[i].name, to->by[i].id, |
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249 | rtems_capture_task_name( by ), |
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250 | by->Object.id)) |
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251 | return 1; |
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252 | } |
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253 | |
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254 | valid_mask >>= 1; |
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255 | valid_remainder >>= 1; |
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256 | } |
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257 | |
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258 | return 0; |
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259 | } |
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260 | |
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261 | /* |
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262 | * This function searches for a trigger given a name. |
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263 | */ |
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264 | static inline rtems_capture_control_t* |
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265 | rtems_capture_find_control (rtems_name name, rtems_id id) |
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266 | { |
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267 | rtems_capture_control_t* control; |
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268 | |
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269 | for (control = capture_controls; control != NULL; control = control->next) |
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270 | if (rtems_capture_match_name_id (name, id, control->name, control->id)) |
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271 | break; |
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272 | return control; |
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273 | } |
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274 | |
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275 | /* |
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276 | * This function checks if a new control structure matches |
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277 | * the given task and sets the control if it does. |
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278 | */ |
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279 | static void |
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280 | rtems_capture_initialize_control (rtems_tcb *tcb) |
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281 | { |
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282 | rtems_name name; |
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283 | rtems_capture_control_t* control; |
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284 | |
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285 | /* |
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286 | * We need to scan the default control list to initialise |
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287 | * this control. |
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288 | */ |
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289 | rtems_object_get_classic_name( tcb->Object.id, &name ); |
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290 | control = capture_controls; |
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291 | if (rtems_capture_match_name_id (control->name, control->id, |
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292 | name, tcb->Object.id)) |
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293 | tcb->Capture.control = control; |
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294 | } |
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295 | |
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296 | /* |
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297 | * This function creates a capture control for the capture engine. |
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298 | */ |
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299 | static inline rtems_capture_control_t* |
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300 | rtems_capture_create_control (rtems_name name, rtems_id id) |
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301 | { |
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302 | rtems_interrupt_lock_context lock_context; |
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303 | rtems_capture_control_t* control; |
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304 | |
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305 | if ((name == 0) && (id == 0)) |
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306 | return NULL; |
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307 | |
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308 | control = rtems_capture_find_control (name, id); |
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309 | |
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310 | if (control == NULL) |
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311 | { |
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312 | control = malloc( sizeof (*control)); |
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313 | |
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314 | if (!control) |
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315 | { |
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316 | capture_flags_global |= RTEMS_CAPTURE_NO_MEMORY; |
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317 | return NULL; |
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318 | } |
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319 | |
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320 | control->name = name; |
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321 | control->id = id; |
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322 | control->flags = 0; |
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323 | control->to_triggers = 0; |
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324 | control->from_triggers = 0; |
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325 | control->by_valid = 0; |
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326 | |
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327 | memset (control->by, 0, sizeof (control->by)); |
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328 | |
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329 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
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330 | |
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331 | control->next = capture_controls; |
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332 | capture_controls = control; |
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333 | rtems_iterate_over_all_threads (rtems_capture_initialize_control); |
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334 | |
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335 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
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336 | } |
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337 | |
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338 | return control; |
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339 | } |
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340 | |
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341 | void rtems_capture_initialize_task( rtems_tcb* tcb ) |
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342 | { |
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343 | rtems_capture_control_t* control; |
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344 | rtems_name name; |
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345 | rtems_interrupt_lock_context lock_context; |
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346 | |
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347 | /* |
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348 | * We need to scan the default control list to initialize |
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349 | * this control if it is a new task. |
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350 | */ |
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351 | |
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352 | rtems_object_get_classic_name( tcb->Object.id, &name ); |
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353 | |
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354 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
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355 | if (tcb->Capture.control == NULL) { |
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356 | for (control = capture_controls; control != NULL; control = control->next) |
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357 | if (rtems_capture_match_name_id (control->name, control->id, |
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358 | name, tcb->Object.id)) |
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359 | tcb->Capture.control = control; |
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360 | } |
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361 | |
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362 | tcb->Capture.flags |= RTEMS_CAPTURE_INIT_TASK; |
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363 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
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364 | } |
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365 | |
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366 | void rtems_capture_record_task( rtems_tcb* tcb ) |
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367 | { |
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368 | rtems_capture_task_record_t rec; |
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369 | void* ptr; |
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370 | rtems_interrupt_lock_context lock_context; |
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371 | |
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372 | rtems_object_get_classic_name( tcb->Object.id, &rec.name ); |
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373 | |
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374 | rec.stack_size = tcb->Start.Initial_stack.size; |
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375 | rec.start_priority = _RTEMS_tasks_Priority_from_Core( |
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376 | tcb->Start.initial_priority |
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377 | ); |
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378 | |
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379 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
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380 | tcb->Capture.flags |= RTEMS_CAPTURE_RECORD_TASK; |
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381 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
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382 | |
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383 | /* |
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384 | * Log the task information. The first time a task is |
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385 | * seen a record is logged. This record can be identified |
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386 | * by a 0 in the event identifier. |
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387 | */ |
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388 | rtems_capture_begin_add_record (tcb, 0, sizeof(rec), &ptr); |
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389 | ptr = rtems_capture_append_to_record( |
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390 | ptr, |
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391 | &rec.name, |
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392 | sizeof( rec.name ) |
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393 | ); |
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394 | ptr = rtems_capture_append_to_record( |
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395 | ptr, |
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396 | &rec.start_priority, |
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397 | sizeof( rec.start_priority) |
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398 | ); |
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399 | ptr = rtems_capture_append_to_record( |
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400 | ptr, |
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401 | &rec.stack_size, |
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402 | sizeof( rec.stack_size) |
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403 | ); |
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404 | rtems_capture_end_add_record ( ptr ); |
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405 | } |
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406 | |
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407 | /* |
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408 | * This function indicates if data should be filtered from the |
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409 | * log. |
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410 | */ |
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411 | bool rtems_capture_filter( rtems_tcb* tcb, |
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412 | uint32_t events) |
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413 | { |
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414 | if (tcb && |
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415 | ((capture_flags_global & |
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416 | (RTEMS_CAPTURE_TRIGGERED | RTEMS_CAPTURE_ONLY_MONITOR)) == |
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417 | RTEMS_CAPTURE_TRIGGERED)) |
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418 | { |
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419 | rtems_capture_control_t* control; |
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420 | |
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421 | control = tcb->Capture.control; |
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422 | |
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423 | /* |
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424 | * Capture the record if we have an event that is always |
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425 | * captured, or the task's real priority is greater than the |
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426 | * watch ceiling, and the global watch or task watch is enabled. |
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427 | */ |
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428 | if ((events & RTEMS_CAPTURE_RECORD_EVENTS) || |
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429 | ((tcb->real_priority >= capture_ceiling) && |
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430 | (tcb->real_priority <= capture_floor) && |
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431 | ((capture_flags_global & RTEMS_CAPTURE_GLOBAL_WATCH) || |
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432 | (control && (control->flags & RTEMS_CAPTURE_WATCH))))) |
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433 | { |
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434 | return false; |
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435 | } |
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436 | } |
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437 | |
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438 | return true; |
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439 | } |
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440 | |
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441 | /* |
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442 | * This function records a capture record into the capture buffer. |
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443 | */ |
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444 | void * |
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445 | rtems_capture_record_open (rtems_tcb* tcb, |
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446 | uint32_t events, |
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447 | size_t size, |
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448 | rtems_capture_record_context_t* context) |
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449 | { |
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450 | rtems_capture_per_cpu_data* per_cpu; |
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451 | uint8_t* ptr; |
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452 | rtems_capture_record_t* capture_in; |
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453 | |
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454 | rtems_interrupt_lock_interrupt_disable (&context->lock_context); |
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455 | per_cpu = capture_per_cpu_get (rtems_get_current_processor ()); |
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456 | context->lock = &per_cpu->lock; |
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457 | rtems_interrupt_lock_acquire_isr (&per_cpu->lock, &context->lock_context); |
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458 | |
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459 | ptr = rtems_capture_buffer_allocate (&per_cpu->records, size); |
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460 | capture_in = (rtems_capture_record_t *) ptr; |
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461 | if ( capture_in ) |
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462 | { |
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463 | ++per_cpu->count; |
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464 | capture_in->size = size; |
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465 | capture_in->task_id = tcb->Object.id; |
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466 | capture_in->events = (events | |
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467 | (tcb->real_priority) | |
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468 | (tcb->current_priority << 8)); |
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469 | |
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470 | if ((events & RTEMS_CAPTURE_RECORD_EVENTS) == 0) |
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471 | tcb->Capture.flags |= RTEMS_CAPTURE_TRACED; |
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472 | |
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473 | rtems_capture_get_time (&capture_in->time); |
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474 | |
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475 | ptr = ptr + sizeof(*capture_in); |
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476 | } |
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477 | else |
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478 | per_cpu->flags |= RTEMS_CAPTURE_OVERFLOW; |
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479 | |
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480 | return ptr; |
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481 | } |
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482 | |
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483 | void rtems_capture_record_close( void *rec, rtems_capture_record_context_t* context) |
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484 | { |
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485 | rtems_interrupt_lock_release (context->lock, &context->lock_context); |
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486 | } |
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487 | |
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488 | /* |
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489 | * See if we have triggered and if not see if this event is a |
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490 | * cause of a trigger. |
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491 | */ |
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492 | bool |
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493 | rtems_capture_trigger (rtems_tcb* ft, |
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494 | rtems_tcb* tt, |
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495 | uint32_t events) |
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496 | { |
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497 | /* |
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498 | * If we have not triggered then see if this is a trigger condition. |
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499 | */ |
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500 | if (!(capture_flags_global & RTEMS_CAPTURE_TRIGGERED)) |
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501 | { |
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502 | rtems_capture_control_t* fc = NULL; |
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503 | rtems_capture_control_t* tc = NULL; |
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504 | uint32_t from_events = 0; |
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505 | uint32_t to_events = 0; |
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506 | uint32_t from_to_events = 0; |
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507 | |
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508 | if (ft) |
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509 | { |
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510 | fc = ft->Capture.control; |
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511 | if (fc) |
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512 | from_events = fc->from_triggers & events; |
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513 | } |
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514 | |
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515 | if (tt) |
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516 | { |
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517 | tc = tt->Capture.control; |
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518 | if (tc) |
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519 | { |
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520 | to_events = tc->to_triggers & events; |
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521 | if (ft && tc->by_valid) |
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522 | from_to_events = tc->by_triggers & events; |
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523 | } |
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524 | } |
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525 | |
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526 | /* |
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527 | * Check if we have any from or to events. These are the |
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528 | * from any or to any type triggers. All from/to triggers are |
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529 | * listed in the to's control with the from in the from list. |
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530 | * |
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531 | * The masking above means any flag set is a trigger. |
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532 | */ |
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533 | if (from_events || to_events) |
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534 | { |
---|
535 | capture_flags_global |= RTEMS_CAPTURE_TRIGGERED; |
---|
536 | return 1; |
---|
537 | } |
---|
538 | |
---|
539 | /* |
---|
540 | * Check the from->to events. |
---|
541 | */ |
---|
542 | if (from_to_events) |
---|
543 | { |
---|
544 | if (rtems_capture_by_in_to (events, ft, tc)) |
---|
545 | { |
---|
546 | capture_flags_global |= RTEMS_CAPTURE_TRIGGERED; |
---|
547 | return 1; |
---|
548 | } |
---|
549 | } |
---|
550 | |
---|
551 | return 0; |
---|
552 | } |
---|
553 | |
---|
554 | return 1; |
---|
555 | } |
---|
556 | |
---|
557 | /* |
---|
558 | * This function initialises the realtime capture engine allocating the trace |
---|
559 | * buffer. It is assumed we have a working heap at stage of initialization. |
---|
560 | */ |
---|
561 | rtems_status_code |
---|
562 | rtems_capture_open (uint32_t size, rtems_capture_timestamp timestamp RTEMS_UNUSED) |
---|
563 | { |
---|
564 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
565 | size_t count; |
---|
566 | uint32_t i; |
---|
567 | rtems_capture_buffer_t* buff; |
---|
568 | |
---|
569 | /* |
---|
570 | * See if the capture engine is already open. |
---|
571 | */ |
---|
572 | |
---|
573 | if ((capture_flags_global & RTEMS_CAPTURE_INIT) == RTEMS_CAPTURE_INIT) { |
---|
574 | return RTEMS_RESOURCE_IN_USE; |
---|
575 | } |
---|
576 | |
---|
577 | count = rtems_get_processor_count(); |
---|
578 | if (capture_per_cpu == NULL) { |
---|
579 | capture_per_cpu = calloc( count, sizeof( *capture_per_cpu ) ); |
---|
580 | } |
---|
581 | |
---|
582 | for (i=0; i<count; i++) { |
---|
583 | buff = &capture_records_on_cpu(i); |
---|
584 | rtems_capture_buffer_create( buff, size ); |
---|
585 | if (buff->buffer == NULL) { |
---|
586 | sc = RTEMS_NO_MEMORY; |
---|
587 | break; |
---|
588 | } |
---|
589 | |
---|
590 | rtems_interrupt_lock_initialize( |
---|
591 | &capture_lock_on_cpu( i ), |
---|
592 | "Capture Per-CPU" |
---|
593 | ); |
---|
594 | } |
---|
595 | |
---|
596 | capture_flags_global = 0; |
---|
597 | capture_ceiling = 0; |
---|
598 | capture_floor = 255; |
---|
599 | if (sc == RTEMS_SUCCESSFUL) |
---|
600 | sc = rtems_capture_user_extension_open(); |
---|
601 | |
---|
602 | if (sc != RTEMS_SUCCESSFUL) |
---|
603 | { |
---|
604 | for (i=0; i<count; i++) |
---|
605 | rtems_capture_buffer_destroy( &capture_records_on_cpu(i)); |
---|
606 | } else { |
---|
607 | capture_flags_global |= RTEMS_CAPTURE_INIT; |
---|
608 | } |
---|
609 | |
---|
610 | return sc; |
---|
611 | } |
---|
612 | |
---|
613 | /* |
---|
614 | * This function shutdowns the capture engine and release any claimed |
---|
615 | * resources. Capture control must be disabled prior to calling a close. |
---|
616 | */ |
---|
617 | rtems_status_code |
---|
618 | rtems_capture_close (void) |
---|
619 | { |
---|
620 | rtems_interrupt_lock_context lock_context; |
---|
621 | rtems_capture_control_t* control; |
---|
622 | rtems_status_code sc; |
---|
623 | uint32_t cpu; |
---|
624 | |
---|
625 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
---|
626 | |
---|
627 | if ((capture_flags_global & RTEMS_CAPTURE_INIT) != RTEMS_CAPTURE_INIT) |
---|
628 | { |
---|
629 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
630 | return RTEMS_SUCCESSFUL; |
---|
631 | } |
---|
632 | |
---|
633 | if ( (capture_flags_global & RTEMS_CAPTURE_ON) != 0 ) |
---|
634 | { |
---|
635 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
636 | return RTEMS_UNSATISFIED; |
---|
637 | } |
---|
638 | |
---|
639 | capture_flags_global &= |
---|
640 | ~(RTEMS_CAPTURE_ON | RTEMS_CAPTURE_ONLY_MONITOR | RTEMS_CAPTURE_INIT); |
---|
641 | |
---|
642 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
643 | |
---|
644 | /* |
---|
645 | * Delete the extension first. This means we are now able to |
---|
646 | * release the resources we have without them being used. |
---|
647 | */ |
---|
648 | |
---|
649 | sc = rtems_capture_user_extension_close(); |
---|
650 | |
---|
651 | if (sc != RTEMS_SUCCESSFUL) |
---|
652 | return sc; |
---|
653 | |
---|
654 | control = capture_controls; |
---|
655 | |
---|
656 | while (control) |
---|
657 | { |
---|
658 | rtems_capture_control_t* delete = control; |
---|
659 | control = control->next; |
---|
660 | free (delete); |
---|
661 | } |
---|
662 | |
---|
663 | capture_controls = NULL; |
---|
664 | for (cpu=0; cpu < rtems_get_processor_count(); cpu++) { |
---|
665 | if (capture_records_on_cpu(cpu).buffer) |
---|
666 | rtems_capture_buffer_destroy( &capture_records_on_cpu(cpu) ); |
---|
667 | |
---|
668 | rtems_interrupt_lock_destroy( &capture_lock_on_cpu( cpu ) ); |
---|
669 | } |
---|
670 | |
---|
671 | free( capture_per_cpu ); |
---|
672 | capture_per_cpu = NULL; |
---|
673 | |
---|
674 | return RTEMS_SUCCESSFUL; |
---|
675 | } |
---|
676 | |
---|
677 | rtems_status_code |
---|
678 | rtems_capture_control (bool enable) |
---|
679 | { |
---|
680 | rtems_interrupt_lock_context lock_context; |
---|
681 | |
---|
682 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
---|
683 | |
---|
684 | if ((capture_flags_global & RTEMS_CAPTURE_INIT) != RTEMS_CAPTURE_INIT) |
---|
685 | { |
---|
686 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
687 | return RTEMS_UNSATISFIED; |
---|
688 | } |
---|
689 | |
---|
690 | if (enable) |
---|
691 | capture_flags_global |= RTEMS_CAPTURE_ON; |
---|
692 | else |
---|
693 | capture_flags_global &= ~RTEMS_CAPTURE_ON; |
---|
694 | |
---|
695 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
696 | |
---|
697 | return RTEMS_SUCCESSFUL; |
---|
698 | } |
---|
699 | |
---|
700 | /* |
---|
701 | * This function enable the monitor mode. When in the monitor mode |
---|
702 | * the tasks are monitored but no data is saved. This can be used |
---|
703 | * to profile the load on a system. |
---|
704 | */ |
---|
705 | rtems_status_code |
---|
706 | rtems_capture_monitor (bool enable) |
---|
707 | { |
---|
708 | rtems_interrupt_lock_context lock_context; |
---|
709 | |
---|
710 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
---|
711 | |
---|
712 | if ((capture_flags_global & RTEMS_CAPTURE_INIT) != RTEMS_CAPTURE_INIT) |
---|
713 | { |
---|
714 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
715 | return RTEMS_UNSATISFIED; |
---|
716 | } |
---|
717 | |
---|
718 | if (enable) |
---|
719 | capture_flags_global |= RTEMS_CAPTURE_ONLY_MONITOR; |
---|
720 | else |
---|
721 | capture_flags_global &= ~RTEMS_CAPTURE_ONLY_MONITOR; |
---|
722 | |
---|
723 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
724 | |
---|
725 | return RTEMS_SUCCESSFUL; |
---|
726 | } |
---|
727 | |
---|
728 | /* |
---|
729 | * This function clears the capture trace flag in the tcb. |
---|
730 | */ |
---|
731 | static void |
---|
732 | rtems_capture_flush_tcb (rtems_tcb *tcb) |
---|
733 | { |
---|
734 | tcb->Capture.flags &= ~RTEMS_CAPTURE_TRACED; |
---|
735 | } |
---|
736 | |
---|
737 | /* |
---|
738 | * This function flushes the capture buffer. The prime parameter allows the |
---|
739 | * capture engine to also be primed again. |
---|
740 | */ |
---|
741 | rtems_status_code |
---|
742 | rtems_capture_flush (bool prime) |
---|
743 | { |
---|
744 | rtems_interrupt_lock_context lock_context_global; |
---|
745 | uint32_t cpu; |
---|
746 | |
---|
747 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context_global); |
---|
748 | |
---|
749 | if ( (capture_flags_global & RTEMS_CAPTURE_ON) != 0 ) |
---|
750 | { |
---|
751 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context_global); |
---|
752 | return RTEMS_UNSATISFIED; |
---|
753 | } |
---|
754 | |
---|
755 | rtems_iterate_over_all_threads (rtems_capture_flush_tcb); |
---|
756 | |
---|
757 | if (prime) |
---|
758 | capture_flags_global &= ~(RTEMS_CAPTURE_TRIGGERED | RTEMS_CAPTURE_OVERFLOW); |
---|
759 | else |
---|
760 | capture_flags_global &= ~RTEMS_CAPTURE_OVERFLOW; |
---|
761 | |
---|
762 | for (cpu=0; cpu < rtems_get_processor_count(); cpu++) { |
---|
763 | RTEMS_INTERRUPT_LOCK_REFERENCE( lock, &(capture_lock_on_cpu( cpu )) ) |
---|
764 | rtems_interrupt_lock_context lock_context_per_cpu; |
---|
765 | |
---|
766 | rtems_interrupt_lock_acquire (lock, &lock_context_per_cpu); |
---|
767 | capture_count_on_cpu(cpu) = 0; |
---|
768 | if (capture_records_on_cpu(cpu).buffer) |
---|
769 | rtems_capture_buffer_flush( &capture_records_on_cpu(cpu) ); |
---|
770 | rtems_interrupt_lock_release (lock, &lock_context_per_cpu); |
---|
771 | } |
---|
772 | |
---|
773 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context_global); |
---|
774 | |
---|
775 | return RTEMS_SUCCESSFUL; |
---|
776 | } |
---|
777 | |
---|
778 | /* |
---|
779 | * This function defines a watch for a specific task given a name. A watch |
---|
780 | * causes it to be traced either in or out of context. The watch can be |
---|
781 | * optionally enabled or disabled with the set routine. It is disabled by |
---|
782 | * default. A watch can only be defined when capture control is disabled |
---|
783 | */ |
---|
784 | rtems_status_code |
---|
785 | rtems_capture_watch_add (rtems_name name, rtems_id id) |
---|
786 | { |
---|
787 | rtems_capture_control_t* control; |
---|
788 | |
---|
789 | if ( (capture_flags_global & RTEMS_CAPTURE_ON) != 0 ) |
---|
790 | return RTEMS_UNSATISFIED; |
---|
791 | |
---|
792 | if ((name == 0) && (id == 0)) |
---|
793 | return RTEMS_UNSATISFIED; |
---|
794 | |
---|
795 | control = rtems_capture_find_control (name, id); |
---|
796 | |
---|
797 | if (control && !id) |
---|
798 | return RTEMS_TOO_MANY; |
---|
799 | |
---|
800 | if (!control) |
---|
801 | control = rtems_capture_create_control (name, id); |
---|
802 | |
---|
803 | if (!control) |
---|
804 | return RTEMS_NO_MEMORY; |
---|
805 | |
---|
806 | return RTEMS_SUCCESSFUL; |
---|
807 | } |
---|
808 | |
---|
809 | /* |
---|
810 | * This function removes a watch for a specific task given a name. The task |
---|
811 | * description will still exist if referenced by a trace record in the trace |
---|
812 | * buffer or a global watch is defined. A watch can only be deleted when |
---|
813 | * capture control is disabled. |
---|
814 | */ |
---|
815 | rtems_status_code |
---|
816 | rtems_capture_watch_del (rtems_name name, rtems_id id) |
---|
817 | { |
---|
818 | rtems_interrupt_lock_context lock_context; |
---|
819 | rtems_capture_control_t* control; |
---|
820 | rtems_capture_control_t** prev_control; |
---|
821 | bool found = false; |
---|
822 | |
---|
823 | if ( (capture_flags_global & RTEMS_CAPTURE_ON) != 0 ) |
---|
824 | return RTEMS_UNSATISFIED; |
---|
825 | |
---|
826 | /* |
---|
827 | * Should this test be for wildcards ? |
---|
828 | */ |
---|
829 | |
---|
830 | for (prev_control = &capture_controls, control = capture_controls; |
---|
831 | control != NULL; ) |
---|
832 | { |
---|
833 | if (rtems_capture_match_name_id (control->name, control->id, name, id)) |
---|
834 | { |
---|
835 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
---|
836 | |
---|
837 | *prev_control = control->next; |
---|
838 | |
---|
839 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
840 | |
---|
841 | free (control); |
---|
842 | |
---|
843 | control = *prev_control; |
---|
844 | |
---|
845 | found = true; |
---|
846 | } |
---|
847 | else |
---|
848 | { |
---|
849 | prev_control = &control->next; |
---|
850 | control = control->next; |
---|
851 | } |
---|
852 | } |
---|
853 | |
---|
854 | if (found) |
---|
855 | return RTEMS_SUCCESSFUL; |
---|
856 | |
---|
857 | return RTEMS_INVALID_NAME; |
---|
858 | } |
---|
859 | |
---|
860 | /* |
---|
861 | * This function allows control of a watch. The watch can be enabled or |
---|
862 | * disabled. |
---|
863 | */ |
---|
864 | rtems_status_code |
---|
865 | rtems_capture_watch_ctrl (rtems_name name, rtems_id id, bool enable) |
---|
866 | { |
---|
867 | rtems_interrupt_lock_context lock_context; |
---|
868 | rtems_capture_control_t* control; |
---|
869 | bool found = false; |
---|
870 | |
---|
871 | if ( (capture_flags_global & RTEMS_CAPTURE_ON) != 0 ) |
---|
872 | return RTEMS_UNSATISFIED; |
---|
873 | |
---|
874 | /* |
---|
875 | * Find the control and then set the watch. It must exist before it can |
---|
876 | * be controlled. |
---|
877 | */ |
---|
878 | for (control = capture_controls; control != NULL; control = control->next) |
---|
879 | { |
---|
880 | if (rtems_capture_match_name_id (control->name, control->id, name, id)) |
---|
881 | { |
---|
882 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
---|
883 | |
---|
884 | if (enable) |
---|
885 | control->flags |= RTEMS_CAPTURE_WATCH; |
---|
886 | else |
---|
887 | control->flags &= ~RTEMS_CAPTURE_WATCH; |
---|
888 | |
---|
889 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
890 | |
---|
891 | found = true; |
---|
892 | } |
---|
893 | } |
---|
894 | |
---|
895 | if (found) |
---|
896 | return RTEMS_SUCCESSFUL; |
---|
897 | |
---|
898 | return RTEMS_INVALID_NAME; |
---|
899 | } |
---|
900 | |
---|
901 | /* |
---|
902 | * This function allows control of a global watch. The watch can be enabled or |
---|
903 | * disabled. A global watch configures all tasks below the ceiling and above |
---|
904 | * the floor to be traced. |
---|
905 | */ |
---|
906 | rtems_status_code |
---|
907 | rtems_capture_watch_global (bool enable) |
---|
908 | { |
---|
909 | rtems_interrupt_lock_context lock_context; |
---|
910 | |
---|
911 | rtems_interrupt_lock_acquire (&capture_lock_global, &lock_context); |
---|
912 | |
---|
913 | /* |
---|
914 | * We need to keep specific and global watches separate so |
---|
915 | * a global enable/disable does not lose a specific watch. |
---|
916 | */ |
---|
917 | if (enable) |
---|
918 | capture_flags_global |= RTEMS_CAPTURE_GLOBAL_WATCH; |
---|
919 | else |
---|
920 | capture_flags_global &= ~RTEMS_CAPTURE_GLOBAL_WATCH; |
---|
921 | |
---|
922 | rtems_interrupt_lock_release (&capture_lock_global, &lock_context); |
---|
923 | |
---|
924 | return RTEMS_SUCCESSFUL; |
---|
925 | } |
---|
926 | |
---|
927 | /* |
---|
928 | * This function returns the global watch state. |
---|
929 | */ |
---|
930 | bool |
---|
931 | rtems_capture_watch_global_on (void) |
---|
932 | { |
---|
933 | return capture_flags_global & RTEMS_CAPTURE_GLOBAL_WATCH ? 1 : 0; |
---|
934 | } |
---|
935 | |
---|
936 | /* |
---|
937 | * This function sets a watch ceiling. Tasks at or greating that the |
---|
938 | * ceiling priority are not watched. This is a simple way to monitor |
---|
939 | * an application and exclude system tasks running at a higher |
---|
940 | * priority level. |
---|
941 | */ |
---|
942 | rtems_status_code |
---|
943 | rtems_capture_watch_ceiling (rtems_task_priority ceiling) |
---|
944 | { |
---|
945 | capture_ceiling = ceiling; |
---|
946 | return RTEMS_SUCCESSFUL; |
---|
947 | } |
---|
948 | |
---|
949 | /* |
---|
950 | * This function gets the watch ceiling. |
---|
951 | */ |
---|
952 | rtems_task_priority |
---|
953 | rtems_capture_watch_get_ceiling (void) |
---|
954 | { |
---|
955 | return capture_ceiling; |
---|
956 | } |
---|
957 | |
---|
958 | /* |
---|
959 | * This function sets a watch floor. Tasks at or less that the |
---|
960 | * floor priority are not watched. This is a simple way to monitor |
---|
961 | * an application and exclude system tasks running at a lower |
---|
962 | * priority level. |
---|
963 | */ |
---|
964 | rtems_status_code |
---|
965 | rtems_capture_watch_floor (rtems_task_priority floor) |
---|
966 | { |
---|
967 | capture_floor = floor; |
---|
968 | return RTEMS_SUCCESSFUL; |
---|
969 | } |
---|
970 | |
---|
971 | /* |
---|
972 | * This function gets the watch floor. |
---|
973 | */ |
---|
974 | rtems_task_priority |
---|
975 | rtems_capture_watch_get_floor (void) |
---|
976 | { |
---|
977 | return capture_floor; |
---|
978 | } |
---|
979 | |
---|
980 | /* |
---|
981 | * Map the trigger to a bit mask. |
---|
982 | */ |
---|
983 | static uint32_t |
---|
984 | rtems_capture_map_trigger (rtems_capture_trigger_t trigger) |
---|
985 | { |
---|
986 | /* |
---|
987 | * Transform the mode and trigger to a bit map. |
---|
988 | */ |
---|
989 | switch (trigger) |
---|
990 | { |
---|
991 | case rtems_capture_switch: |
---|
992 | return RTEMS_CAPTURE_SWITCH; |
---|
993 | case rtems_capture_create: |
---|
994 | return RTEMS_CAPTURE_CREATE; |
---|
995 | case rtems_capture_start: |
---|
996 | return RTEMS_CAPTURE_START; |
---|
997 | case rtems_capture_restart: |
---|
998 | return RTEMS_CAPTURE_RESTART; |
---|
999 | case rtems_capture_delete: |
---|
1000 | return RTEMS_CAPTURE_DELETE; |
---|
1001 | case rtems_capture_begin: |
---|
1002 | return RTEMS_CAPTURE_BEGIN; |
---|
1003 | case rtems_capture_exitted: |
---|
1004 | return RTEMS_CAPTURE_EXITTED; |
---|
1005 | case rtems_capture_terminated: |
---|
1006 | return RTEMS_CAPTURE_TERMINATED; |
---|
1007 | default: |
---|
1008 | break; |
---|
1009 | } |
---|
1010 | return 0; |
---|
1011 | } |
---|
1012 | |
---|
1013 | /* |
---|
1014 | * This function sets a trigger. |
---|
1015 | * |
---|
1016 | * This set trigger routine will create a capture control for the |
---|
1017 | * target task. The task list is searched and any existing tasks |
---|
1018 | * are linked to the new control. |
---|
1019 | * |
---|
1020 | * We can have a number of tasks that have the same name so we |
---|
1021 | * search using names. This means a number of tasks can be |
---|
1022 | * linked to single control. |
---|
1023 | */ |
---|
1024 | rtems_status_code |
---|
1025 | rtems_capture_set_trigger (rtems_name from_name, |
---|
1026 | rtems_id from_id, |
---|
1027 | rtems_name to_name, |
---|
1028 | rtems_id to_id, |
---|
1029 | rtems_capture_trigger_mode_t mode, |
---|
1030 | rtems_capture_trigger_t trigger) |
---|
1031 | { |
---|
1032 | rtems_capture_control_t* control; |
---|
1033 | uint32_t flags; |
---|
1034 | |
---|
1035 | flags = rtems_capture_map_trigger (trigger); |
---|
1036 | |
---|
1037 | /* |
---|
1038 | * The mode sets the opposite type of trigger. For example |
---|
1039 | * FROM ANY means trigger when the event happens TO this |
---|
1040 | * task. TO ANY means FROM this task. |
---|
1041 | */ |
---|
1042 | |
---|
1043 | if (mode == rtems_capture_to_any) |
---|
1044 | { |
---|
1045 | control = rtems_capture_create_control (from_name, from_id); |
---|
1046 | if (control == NULL) |
---|
1047 | return RTEMS_NO_MEMORY; |
---|
1048 | control->from_triggers |= flags & RTEMS_CAPTURE_FROM_TRIGS; |
---|
1049 | } |
---|
1050 | else |
---|
1051 | { |
---|
1052 | control = rtems_capture_create_control (to_name, to_id); |
---|
1053 | if (control == NULL) |
---|
1054 | return RTEMS_NO_MEMORY; |
---|
1055 | if (mode == rtems_capture_from_any) |
---|
1056 | control->to_triggers |= flags; |
---|
1057 | else |
---|
1058 | { |
---|
1059 | bool done = false; |
---|
1060 | int i; |
---|
1061 | |
---|
1062 | control->by_triggers |= flags; |
---|
1063 | |
---|
1064 | for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) |
---|
1065 | { |
---|
1066 | if (rtems_capture_control_by_valid (control, i) && |
---|
1067 | ((control->by[i].name == from_name) || |
---|
1068 | (from_id && (control->by[i].id == from_id)))) |
---|
1069 | { |
---|
1070 | control->by[i].trigger |= flags; |
---|
1071 | done = true; |
---|
1072 | break; |
---|
1073 | } |
---|
1074 | } |
---|
1075 | |
---|
1076 | if (!done) |
---|
1077 | { |
---|
1078 | for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) |
---|
1079 | { |
---|
1080 | if (!rtems_capture_control_by_valid (control, i)) |
---|
1081 | { |
---|
1082 | control->by_valid |= RTEMS_CAPTURE_CONTROL_FROM_MASK (i); |
---|
1083 | control->by[i].name = from_name; |
---|
1084 | control->by[i].id = from_id; |
---|
1085 | control->by[i].trigger = flags; |
---|
1086 | done = true; |
---|
1087 | break; |
---|
1088 | } |
---|
1089 | } |
---|
1090 | } |
---|
1091 | |
---|
1092 | if (!done) |
---|
1093 | return RTEMS_TOO_MANY; |
---|
1094 | } |
---|
1095 | } |
---|
1096 | return RTEMS_SUCCESSFUL; |
---|
1097 | } |
---|
1098 | |
---|
1099 | /* |
---|
1100 | * This function clear a trigger. |
---|
1101 | */ |
---|
1102 | rtems_status_code |
---|
1103 | rtems_capture_clear_trigger (rtems_name from_name, |
---|
1104 | rtems_id from_id, |
---|
1105 | rtems_name to_name, |
---|
1106 | rtems_id to_id, |
---|
1107 | rtems_capture_trigger_mode_t mode, |
---|
1108 | rtems_capture_trigger_t trigger) |
---|
1109 | { |
---|
1110 | rtems_capture_control_t* control; |
---|
1111 | uint32_t flags; |
---|
1112 | |
---|
1113 | flags = rtems_capture_map_trigger (trigger); |
---|
1114 | |
---|
1115 | if (mode == rtems_capture_to_any) |
---|
1116 | { |
---|
1117 | control = rtems_capture_find_control (from_name, from_id); |
---|
1118 | if (control == NULL) |
---|
1119 | { |
---|
1120 | if (from_id) |
---|
1121 | return RTEMS_INVALID_ID; |
---|
1122 | return RTEMS_INVALID_NAME; |
---|
1123 | } |
---|
1124 | control->from_triggers &= ~flags; |
---|
1125 | } |
---|
1126 | else |
---|
1127 | { |
---|
1128 | control = rtems_capture_find_control (to_name, to_id); |
---|
1129 | if (control == NULL) |
---|
1130 | { |
---|
1131 | if (to_id) |
---|
1132 | return RTEMS_INVALID_ID; |
---|
1133 | return RTEMS_INVALID_NAME; |
---|
1134 | } |
---|
1135 | if (mode == rtems_capture_from_any) |
---|
1136 | control->to_triggers &= ~flags; |
---|
1137 | else |
---|
1138 | { |
---|
1139 | bool done = false; |
---|
1140 | int i; |
---|
1141 | |
---|
1142 | control->by_triggers &= ~flags; |
---|
1143 | |
---|
1144 | for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) |
---|
1145 | { |
---|
1146 | if (rtems_capture_control_by_valid (control, i) && |
---|
1147 | ((control->by[i].name == from_name) || |
---|
1148 | (control->by[i].id == from_id))) |
---|
1149 | { |
---|
1150 | control->by[i].trigger &= ~trigger; |
---|
1151 | if (control->by[i].trigger == 0) |
---|
1152 | control->by_valid &= ~RTEMS_CAPTURE_CONTROL_FROM_MASK (i); |
---|
1153 | done = true; |
---|
1154 | break; |
---|
1155 | } |
---|
1156 | } |
---|
1157 | |
---|
1158 | if (!done) |
---|
1159 | { |
---|
1160 | if (from_id) |
---|
1161 | return RTEMS_INVALID_ID; |
---|
1162 | return RTEMS_INVALID_NAME; |
---|
1163 | } |
---|
1164 | } |
---|
1165 | } |
---|
1166 | return RTEMS_SUCCESSFUL; |
---|
1167 | } |
---|
1168 | |
---|
1169 | static inline uint32_t rtems_capture_count_records( void* recs, size_t size ) |
---|
1170 | { |
---|
1171 | rtems_capture_record_t* rec; |
---|
1172 | uint8_t* ptr = recs; |
---|
1173 | uint32_t rec_count = 0; |
---|
1174 | size_t byte_count = 0; |
---|
1175 | |
---|
1176 | |
---|
1177 | while (byte_count < size) { |
---|
1178 | rec = (rtems_capture_record_t*) ptr; |
---|
1179 | rec_count++; |
---|
1180 | _Assert( rec->size >= sizeof(*rec) ); |
---|
1181 | ptr += rec->size; |
---|
1182 | byte_count += rec->size; |
---|
1183 | }; |
---|
1184 | |
---|
1185 | return rec_count; |
---|
1186 | } |
---|
1187 | |
---|
1188 | /* |
---|
1189 | * This function reads a number of records from the capture buffer. |
---|
1190 | * |
---|
1191 | * The function returns the number of record that is has that are |
---|
1192 | * in a continous block of memory. If the number of available records |
---|
1193 | * wrap then only those records are provided. This removes the need for |
---|
1194 | * caller to be concerned about buffer wrappings. If the number of |
---|
1195 | * requested records cannot be met due to the wrapping of the records |
---|
1196 | * less than the specified number will be returned. |
---|
1197 | * |
---|
1198 | * The user must release the records. This is achieved with a call to |
---|
1199 | * rtems_capture_release. Calls this function without a release will |
---|
1200 | * result in at least the same number of records being released. |
---|
1201 | */ |
---|
1202 | rtems_status_code |
---|
1203 | rtems_capture_read (uint32_t cpu, |
---|
1204 | uint32_t* read, |
---|
1205 | rtems_capture_record_t** recs) |
---|
1206 | { |
---|
1207 | rtems_interrupt_lock_context lock_context; |
---|
1208 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
1209 | size_t recs_size = 0; |
---|
1210 | RTEMS_INTERRUPT_LOCK_REFERENCE( lock, &(capture_lock_on_cpu( cpu )) ) |
---|
1211 | rtems_capture_buffer_t* records = &(capture_records_on_cpu( cpu )); |
---|
1212 | uint32_t* flags = &(capture_flags_on_cpu( cpu )); |
---|
1213 | |
---|
1214 | *read = 0; |
---|
1215 | *recs = NULL; |
---|
1216 | |
---|
1217 | rtems_interrupt_lock_acquire (lock, &lock_context); |
---|
1218 | |
---|
1219 | /* |
---|
1220 | * Only one reader is allowed. |
---|
1221 | */ |
---|
1222 | |
---|
1223 | if (*flags & RTEMS_CAPTURE_READER_ACTIVE) |
---|
1224 | { |
---|
1225 | rtems_interrupt_lock_release (lock, &lock_context); |
---|
1226 | return RTEMS_RESOURCE_IN_USE; |
---|
1227 | } |
---|
1228 | |
---|
1229 | if ( (capture_flags_global & RTEMS_CAPTURE_ON) != 0 ) |
---|
1230 | { |
---|
1231 | rtems_interrupt_lock_release (lock, &lock_context); |
---|
1232 | return RTEMS_UNSATISFIED; |
---|
1233 | } |
---|
1234 | |
---|
1235 | *flags |= RTEMS_CAPTURE_READER_ACTIVE; |
---|
1236 | |
---|
1237 | *recs = rtems_capture_buffer_peek( records, &recs_size ); |
---|
1238 | |
---|
1239 | *read = rtems_capture_count_records( *recs, recs_size ); |
---|
1240 | |
---|
1241 | rtems_interrupt_lock_release (lock, &lock_context); |
---|
1242 | |
---|
1243 | return sc; |
---|
1244 | } |
---|
1245 | |
---|
1246 | /* |
---|
1247 | * This function releases the requested number of record slots back |
---|
1248 | * to the capture engine. The count must match the number read. |
---|
1249 | */ |
---|
1250 | rtems_status_code |
---|
1251 | rtems_capture_release (uint32_t cpu, uint32_t count) |
---|
1252 | { |
---|
1253 | rtems_interrupt_lock_context lock_context; |
---|
1254 | uint8_t* ptr; |
---|
1255 | rtems_capture_record_t* rec; |
---|
1256 | uint32_t counted; |
---|
1257 | size_t ptr_size = 0; |
---|
1258 | size_t rel_size = 0; |
---|
1259 | rtems_status_code ret_val = RTEMS_SUCCESSFUL; |
---|
1260 | RTEMS_INTERRUPT_LOCK_REFERENCE( lock, &(capture_lock_on_cpu( cpu )) ) |
---|
1261 | rtems_capture_buffer_t* records = &(capture_records_on_cpu( cpu )); |
---|
1262 | uint32_t* flags = &(capture_flags_on_cpu( cpu )); |
---|
1263 | uint32_t* total = &(capture_count_on_cpu( cpu )); |
---|
1264 | |
---|
1265 | rtems_interrupt_lock_acquire (lock, &lock_context); |
---|
1266 | |
---|
1267 | if (count > *total) { |
---|
1268 | count = *total; |
---|
1269 | } |
---|
1270 | |
---|
1271 | if ( (capture_flags_global & RTEMS_CAPTURE_ON) != 0 ) { |
---|
1272 | rtems_interrupt_lock_release (lock, &lock_context); |
---|
1273 | return RTEMS_UNSATISFIED; |
---|
1274 | } |
---|
1275 | |
---|
1276 | counted = count; |
---|
1277 | |
---|
1278 | ptr = rtems_capture_buffer_peek( records, &ptr_size ); |
---|
1279 | _Assert(ptr_size >= (count * sizeof(*rec) )); |
---|
1280 | |
---|
1281 | rel_size = 0; |
---|
1282 | while (counted--) { |
---|
1283 | rec = (rtems_capture_record_t*) ptr; |
---|
1284 | rel_size += rec->size; |
---|
1285 | _Assert( rel_size <= ptr_size ); |
---|
1286 | ptr += rec->size; |
---|
1287 | } |
---|
1288 | |
---|
1289 | if (rel_size > ptr_size ) { |
---|
1290 | ret_val = RTEMS_INVALID_NUMBER; |
---|
1291 | rel_size = ptr_size; |
---|
1292 | } |
---|
1293 | |
---|
1294 | *total -= count; |
---|
1295 | |
---|
1296 | if (count) { |
---|
1297 | rtems_capture_buffer_free( records, rel_size ); |
---|
1298 | } |
---|
1299 | |
---|
1300 | *flags &= ~RTEMS_CAPTURE_READER_ACTIVE; |
---|
1301 | |
---|
1302 | rtems_interrupt_lock_release (lock, &lock_context); |
---|
1303 | |
---|
1304 | return ret_val; |
---|
1305 | } |
---|
1306 | |
---|
1307 | /* |
---|
1308 | * This function returns the current time. If a handler is provided |
---|
1309 | * by the user get the time from that. |
---|
1310 | */ |
---|
1311 | void |
---|
1312 | rtems_capture_time (rtems_capture_time_t* uptime) |
---|
1313 | { |
---|
1314 | rtems_capture_get_time(uptime); |
---|
1315 | } |
---|
1316 | |
---|
1317 | /* |
---|
1318 | * This function returns a string for an event based on the bit in the |
---|
1319 | * event. The functions takes the bit offset as a number not the bit |
---|
1320 | * set in a bit map. |
---|
1321 | */ |
---|
1322 | const char* |
---|
1323 | rtems_capture_event_text (int event) |
---|
1324 | { |
---|
1325 | if ((event < RTEMS_CAPTURE_EVENT_START) || (event > RTEMS_CAPTURE_EVENT_END)) |
---|
1326 | return "invalid event id"; |
---|
1327 | return capture_event_text[event - RTEMS_CAPTURE_EVENT_START]; |
---|
1328 | } |
---|
1329 | |
---|
1330 | /* |
---|
1331 | * This function returns the head of the list of control in the |
---|
1332 | * capture engine. |
---|
1333 | */ |
---|
1334 | rtems_capture_control_t* |
---|
1335 | rtems_capture_get_control_list (void) |
---|
1336 | { |
---|
1337 | return capture_controls; |
---|
1338 | } |
---|