1 | /* |
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2 | ------------------------------------------------------------------------ |
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3 | $Id$ |
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4 | ------------------------------------------------------------------------ |
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5 | |
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6 | Copyright Objective Design Systems Pty Ltd, 2002 |
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7 | All rights reserved Objective Design Systems Pty Ltd, 2002 |
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8 | Chris Johns (ccj@acm.org) |
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9 | |
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10 | COPYRIGHT (c) 1989-1998. |
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11 | On-Line Applications Research Corporation (OAR). |
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12 | |
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13 | The license and distribution terms for this file may be |
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14 | found in the file LICENSE in this distribution. |
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15 | |
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16 | This software with is provided ``as is'' and with NO WARRANTY. |
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17 | |
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18 | ------------------------------------------------------------------------ |
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19 | |
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20 | RTEMS Performance Monitoring and Measurement Framework. |
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21 | |
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22 | This is the Capture Engine component. |
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23 | |
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24 | */ |
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25 | |
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26 | #include <stdlib.h> |
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27 | |
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28 | #include "capture.h" |
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29 | #include <rtems/score/states.inl> |
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30 | #include <rtems/score/wkspace.h> |
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31 | #include <rtems/score/wkspace.inl> |
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32 | |
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33 | /* |
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34 | * These events are always recorded and are not part of the |
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35 | * watch filters. |
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36 | */ |
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37 | #define RTEMS_CAPTURE_RECORD_EVENTS (RTEMS_CAPTURE_CREATED_BY_EVENT | \ |
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38 | RTEMS_CAPTURE_CREATED_EVENT | \ |
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39 | RTEMS_CAPTURE_STARTED_BY_EVENT | \ |
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40 | RTEMS_CAPTURE_STARTED_EVENT | \ |
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41 | RTEMS_CAPTURE_RESTARTED_BY_EVENT | \ |
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42 | RTEMS_CAPTURE_RESTARTED_EVENT | \ |
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43 | RTEMS_CAPTURE_DELETED_BY_EVENT | \ |
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44 | RTEMS_CAPTURE_DELETED_EVENT | \ |
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45 | RTEMS_CAPTURE_BEGIN_EVENT | \ |
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46 | RTEMS_CAPTURE_EXITTED_EVENT) |
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47 | |
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48 | /* |
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49 | * Global capture flags. |
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50 | */ |
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51 | #define RTEMS_CAPTURE_ON (1 << 0) |
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52 | #define RTEMS_CAPTURE_NO_MEMORY (1 << 1) |
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53 | #define RTEMS_CAPTURE_OVERFLOW (1 << 2) |
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54 | #define RTEMS_CAPTURE_TRIGGERED (1 << 3) |
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55 | #define RTEMS_CAPTURE_READER_ACTIVE (1 << 4) |
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56 | #define RTEMS_CAPTURE_READER_WAITING (1 << 5) |
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57 | #define RTEMS_CAPTURE_GLOBAL_WATCH (1 << 6) |
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58 | |
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59 | /* |
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60 | * RTEMS Capture Data. |
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61 | */ |
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62 | static rtems_capture_record_t* capture_records; |
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63 | static rtems_unsigned32 capture_size; |
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64 | static rtems_unsigned32 capture_count; |
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65 | static rtems_capture_record_t* capture_in; |
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66 | static rtems_unsigned32 capture_out; |
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67 | static rtems_unsigned32 capture_flags; |
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68 | static rtems_capture_task_t* capture_tasks; |
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69 | static rtems_capture_control_t* capture_controls; |
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70 | static int capture_extension_index; |
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71 | static rtems_id capture_id; |
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72 | static rtems_capture_timestamp capture_timestamp; |
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73 | static rtems_task_priority capture_ceiling; |
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74 | static rtems_task_priority capture_floor; |
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75 | static rtems_unsigned32 capture_tick_period; |
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76 | static rtems_id capture_reader; |
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77 | |
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78 | /* |
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79 | * RTEMS Event text. |
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80 | */ |
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81 | static const char* capture_event_text[] = |
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82 | { |
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83 | "CREATED_BY", |
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84 | "CREATED", |
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85 | "STARTED_BY", |
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86 | "STARTED", |
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87 | "RESTARTED_BY", |
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88 | "RESTARTED", |
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89 | "DELETED_BY", |
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90 | "DELETED", |
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91 | "BEGIN", |
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92 | "EXITTED", |
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93 | "SWITCHED_OUT", |
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94 | "SWITCHED_IN", |
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95 | "TIMESTAMP" |
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96 | }; |
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97 | |
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98 | /* |
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99 | * rtems_capture_get_time |
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100 | * |
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101 | * DESCRIPTION: |
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102 | * |
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103 | * This function returns the current time. If a handler is provided |
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104 | * by the user get the time from that. |
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105 | */ |
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106 | static inline void rtems_capture_get_time (rtems_unsigned32* ticks, |
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107 | rtems_unsigned32* tick_offset) |
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108 | { |
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109 | if (capture_timestamp) |
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110 | capture_timestamp (ticks, tick_offset); |
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111 | else |
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112 | { |
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113 | *ticks = _Watchdog_Ticks_since_boot; |
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114 | *tick_offset = 0; |
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115 | } |
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116 | } |
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117 | |
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118 | /* |
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119 | * rtems_capture_match_names |
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120 | * |
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121 | * DESCRIPTION: |
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122 | * |
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123 | * This function compares rtems_names. It protects the |
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124 | * capture engine from a change to the way names are supported |
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125 | * in RTEMS. |
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126 | * |
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127 | */ |
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128 | static inline rtems_boolean |
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129 | rtems_capture_match_names (rtems_name lhs, rtems_name rhs) |
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130 | { |
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131 | return lhs == rhs; |
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132 | } |
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133 | |
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134 | /* |
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135 | * rtems_capture_dup_name |
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136 | * |
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137 | * DESCRIPTION: |
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138 | * |
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139 | * This function duplicates an rtems_names. It protects the |
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140 | * cpature engine from a change to the way names are supported |
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141 | * in RTEMS. |
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142 | * |
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143 | */ |
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144 | static inline void |
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145 | rtems_capture_dup_name (rtems_name* dst, rtems_name src) |
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146 | { |
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147 | *dst = src; |
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148 | } |
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149 | |
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150 | /* |
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151 | * rtems_capture_name_in_group |
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152 | * |
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153 | * DESCRIPTION: |
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154 | * |
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155 | * This function sees if a name is in a group of names. |
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156 | * |
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157 | */ |
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158 | static inline rtems_boolean |
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159 | rtems_capture_name_in_group (rtems_name task, rtems_name* tasks) |
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160 | { |
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161 | if (tasks) |
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162 | { |
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163 | int i; |
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164 | for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) |
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165 | if (rtems_capture_match_names (task, *tasks++)) |
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166 | return 1; |
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167 | } |
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168 | return 0; |
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169 | } |
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170 | |
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171 | /* |
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172 | * rtems_capture_match_name_id |
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173 | * |
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174 | * DESCRIPTION: |
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175 | * |
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176 | * This function matches a name and/or id. |
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177 | */ |
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178 | static inline rtems_boolean |
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179 | rtems_capture_match_name_id (rtems_name lhs_name, |
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180 | rtems_id lhs_id, |
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181 | rtems_name rhs_name, |
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182 | rtems_id rhs_id) |
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183 | { |
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184 | /* |
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185 | * The left hand side name or id could be 0 which means a wildcard. |
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186 | */ |
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187 | if ((lhs_name == 0) && (lhs_id == rhs_id)) |
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188 | return 1; |
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189 | else if ((lhs_id == 0) || (lhs_id == rhs_id)) |
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190 | { |
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191 | if (rtems_capture_match_names (lhs_name, rhs_name)) |
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192 | return 1; |
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193 | } |
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194 | return 0; |
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195 | } |
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196 | |
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197 | /* |
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198 | * rtems_capture_init_stack_usage |
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199 | * |
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200 | * DESCRIPTION: |
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201 | * |
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202 | * This function setups a stack so its usage can be monitored. |
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203 | */ |
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204 | static inline void |
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205 | rtems_capture_init_stack_usage (rtems_capture_task_t* task) |
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206 | { |
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207 | if (task->tcb) |
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208 | { |
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209 | rtems_unsigned32* s; |
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210 | rtems_unsigned32 i; |
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211 | |
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212 | task->stack_size = task->tcb->Start.Initial_stack.size; |
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213 | task->stack_clean = task->stack_size; |
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214 | |
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215 | s = task->tcb->Start.Initial_stack.area; |
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216 | |
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217 | for (i = 0; i < (task->stack_size - 128); i += 4) |
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218 | *(s++) = 0xdeaddead; |
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219 | } |
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220 | } |
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221 | |
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222 | /* |
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223 | * rtems_capture_find_control |
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224 | * |
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225 | * DESCRIPTION: |
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226 | * |
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227 | * This function searches for a trigger given a name. |
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228 | * |
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229 | */ |
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230 | static inline rtems_capture_control_t* |
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231 | rtems_capture_find_control (rtems_name name, rtems_id id) |
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232 | { |
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233 | rtems_capture_control_t* control; |
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234 | |
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235 | for (control = capture_controls; control != NULL; control = control->next) |
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236 | if (rtems_capture_match_name_id (name, id, control->name, control->id)) |
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237 | break; |
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238 | return control; |
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239 | } |
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240 | |
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241 | /* |
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242 | * rtems_capture_create_control |
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243 | * |
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244 | * DESCRIPTION: |
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245 | * |
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246 | * This function creates a capture control for the capture engine. |
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247 | * |
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248 | */ |
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249 | static inline rtems_capture_control_t* |
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250 | rtems_capture_create_control (rtems_name name, rtems_id id) |
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251 | { |
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252 | rtems_interrupt_level level; |
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253 | rtems_capture_control_t* control; |
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254 | rtems_capture_task_t* task; |
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255 | |
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256 | if ((name == 0) && (id == 0)) |
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257 | return NULL; |
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258 | |
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259 | control = rtems_capture_find_control (name, id); |
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260 | |
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261 | if (control == NULL) |
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262 | { |
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263 | control = _Workspace_Allocate (sizeof (rtems_capture_control_t)); |
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264 | |
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265 | if (control == NULL) |
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266 | { |
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267 | capture_flags |= RTEMS_CAPTURE_NO_MEMORY; |
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268 | return NULL; |
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269 | } |
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270 | |
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271 | control->name = name; |
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272 | control->id = id; |
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273 | control->flags = 0; |
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274 | |
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275 | memset (control->from, 0, sizeof (control->from)); |
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276 | memset (control->from_id, 0, sizeof (control->from_id)); |
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277 | |
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278 | rtems_interrupt_disable (level); |
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279 | |
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280 | control->next = capture_controls; |
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281 | capture_controls = control; |
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282 | |
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283 | /* |
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284 | * We need to scan the task list as set the control to the |
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285 | * tasks. |
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286 | */ |
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287 | for (task = capture_tasks; task != NULL; task = task->next) |
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288 | if (rtems_capture_match_name_id (name, id, task->name, task->id)) |
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289 | task->control = control; |
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290 | |
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291 | rtems_interrupt_enable (level); |
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292 | } |
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293 | |
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294 | return control; |
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295 | } |
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296 | |
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297 | /* |
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298 | * rtems_capture_create_capture_task |
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299 | * |
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300 | * DESCRIPTION: |
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301 | * |
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302 | * This function create the task control. |
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303 | * |
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304 | */ |
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305 | static inline rtems_capture_task_t* |
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306 | rtems_capture_create_capture_task (rtems_tcb* new_task) |
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307 | { |
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308 | rtems_interrupt_level level; |
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309 | rtems_capture_task_t* task; |
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310 | rtems_capture_control_t* control; |
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311 | |
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312 | task = _Workspace_Allocate (sizeof (rtems_capture_task_t)); |
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313 | |
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314 | if (task == NULL) |
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315 | { |
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316 | capture_flags |= 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 | rtems_capture_dup_name (&task->name, *((rtems_name*) new_task->Object.name)); |
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321 | |
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322 | task->id = new_task->Object.id; |
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323 | task->flags = 0; |
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324 | task->in = 0; |
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325 | task->out = 0; |
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326 | task->tcb = new_task; |
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327 | task->ticks = 0; |
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328 | task->tick_offset = 0; |
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329 | task->ticks_in = 0; |
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330 | task->tick_offset_in = 0; |
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331 | task->control = 0; |
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332 | task->last_ticks = 0; |
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333 | task->last_tick_offset = 0; |
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334 | |
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335 | task->tcb->extensions[capture_extension_index] = task; |
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336 | |
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337 | task->start_priority = new_task->Start.initial_priority; |
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338 | task->stack_size = new_task->Start.Initial_stack.size; |
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339 | task->stack_clean = task->stack_size; |
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340 | |
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341 | rtems_interrupt_disable (level); |
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342 | |
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343 | task->next = capture_tasks; |
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344 | capture_tasks = task; |
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345 | |
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346 | rtems_interrupt_enable (level); |
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347 | |
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348 | /* |
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349 | * We need to scan the default control list to initialise |
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350 | * this control. |
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351 | */ |
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352 | |
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353 | for (control = capture_controls; control != NULL; control = control->next) |
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354 | if (rtems_capture_match_name_id (control->name, control->id, |
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355 | task->name, task->id)) |
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356 | task->control = control; |
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357 | |
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358 | return task; |
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359 | } |
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360 | |
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361 | /* |
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362 | * rtems_capture_record |
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363 | * |
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364 | * DESCRIPTION: |
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365 | * |
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366 | * This function records a capture record into the capture buffer. |
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367 | * |
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368 | */ |
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369 | static inline void |
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370 | rtems_capture_record (rtems_capture_task_t* task, |
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371 | rtems_unsigned32 events) |
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372 | { |
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373 | /* |
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374 | * Check the watch state if we have a task control, and |
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375 | * the task's real priority is lower or equal to the ceiling. |
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376 | */ |
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377 | if (task) |
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378 | { |
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379 | rtems_capture_control_t* control; |
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380 | |
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381 | control = task->control; |
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382 | |
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383 | /* |
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384 | * Capure the record if we have an event that is always |
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385 | * captured, or the task's real priority is greater than the |
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386 | * watch ceiling, and the global watch or task watch is enabled. |
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387 | */ |
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388 | |
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389 | if ((events & RTEMS_CAPTURE_RECORD_EVENTS) || |
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390 | ((task->tcb->real_priority >= capture_ceiling) && |
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391 | (task->tcb->real_priority <= capture_floor) && |
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392 | ((capture_flags & RTEMS_CAPTURE_GLOBAL_WATCH) || |
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393 | (control && (control->flags & RTEMS_CAPTURE_WATCH))))) |
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394 | { |
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395 | rtems_interrupt_level level; |
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396 | |
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397 | rtems_interrupt_disable (level); |
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398 | |
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399 | if (capture_count < capture_size) |
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400 | { |
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401 | capture_count++; |
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402 | capture_in->task = task; |
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403 | capture_in->events = (events | |
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404 | (task->tcb->real_priority) | |
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405 | (task->tcb->current_priority << 8)); |
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406 | |
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407 | if ((events & RTEMS_CAPTURE_RECORD_EVENTS) == 0) |
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408 | task->flags |= RTEMS_CAPTURE_TRACED; |
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409 | |
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410 | rtems_capture_get_time (&capture_in->ticks, &capture_in->tick_offset); |
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411 | |
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412 | if (capture_in == &capture_records[capture_size - 1]) |
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413 | capture_in = capture_records; |
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414 | else |
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415 | capture_in++; |
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416 | } |
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417 | else |
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418 | capture_flags |= RTEMS_CAPTURE_OVERFLOW; |
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419 | rtems_interrupt_enable (level); |
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420 | } |
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421 | } |
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422 | } |
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423 | |
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424 | /* |
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425 | * rtems_capture_create_task |
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426 | * |
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427 | * DESCRIPTION: |
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428 | * |
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429 | * This function is called when a task is created. |
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430 | * |
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431 | */ |
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432 | static rtems_boolean |
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433 | rtems_capture_create_task (rtems_tcb* current_task, |
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434 | rtems_tcb* new_task) |
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435 | { |
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436 | rtems_capture_task_t* ct; |
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437 | rtems_capture_task_t* nt; |
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438 | |
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439 | ct = current_task->extensions[capture_extension_index]; |
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440 | |
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441 | /* |
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442 | * The task ponters may not be known as the task may have |
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443 | * been created before the capture engine was open. Add them. |
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444 | */ |
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445 | |
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446 | if (ct == NULL) |
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447 | ct = rtems_capture_create_capture_task (current_task); |
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448 | |
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449 | /* |
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450 | * Create the new task's capture control block. |
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451 | */ |
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452 | nt = rtems_capture_create_capture_task (new_task); |
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453 | |
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454 | /* |
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455 | * If we are logging then record this fact. |
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456 | */ |
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457 | rtems_capture_record (ct, RTEMS_CAPTURE_CREATED_BY_EVENT); |
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458 | rtems_capture_record (nt, RTEMS_CAPTURE_CREATED_EVENT); |
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459 | |
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460 | return 1 == 1; |
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461 | } |
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462 | |
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463 | /* |
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464 | * rtems_capture_start_task |
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465 | * |
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466 | * DESCRIPTION: |
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467 | * |
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468 | * This function is called when a task is started. |
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469 | * |
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470 | */ |
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471 | static rtems_extension |
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472 | rtems_capture_start_task (rtems_tcb* current_task, |
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473 | rtems_tcb* started_task) |
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474 | { |
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475 | /* |
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476 | * Get the capture task control block so we can trace this |
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477 | * event. |
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478 | */ |
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479 | rtems_capture_task_t* ct; |
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480 | rtems_capture_task_t* st; |
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481 | |
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482 | ct = current_task->extensions[capture_extension_index]; |
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483 | st = started_task->extensions[capture_extension_index]; |
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484 | |
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485 | /* |
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486 | * The task ponters may not be known as the task may have |
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487 | * been created before the capture engine was open. Add them. |
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488 | */ |
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489 | |
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490 | if (ct == NULL) |
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491 | ct = rtems_capture_create_capture_task (current_task); |
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492 | |
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493 | if (st == NULL) |
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494 | st = rtems_capture_create_capture_task (started_task); |
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495 | |
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496 | rtems_capture_record (ct, RTEMS_CAPTURE_STARTED_BY_EVENT); |
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497 | rtems_capture_record (st, RTEMS_CAPTURE_STARTED_EVENT); |
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498 | |
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499 | rtems_capture_init_stack_usage (st); |
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500 | } |
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501 | |
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502 | /* |
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503 | * rtems_capture_restart_task |
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504 | * |
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505 | * DESCRIPTION: |
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506 | * |
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507 | * This function is called when a task is restarted. |
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508 | * |
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509 | */ |
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510 | static rtems_extension |
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511 | rtems_capture_restart_task (rtems_tcb* current_task, |
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512 | rtems_tcb* restarted_task) |
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513 | { |
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514 | /* |
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515 | * Get the capture task control block so we can trace this |
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516 | * event. |
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517 | */ |
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518 | rtems_capture_task_t* ct; |
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519 | rtems_capture_task_t* rt; |
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520 | |
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521 | ct = current_task->extensions[capture_extension_index]; |
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522 | rt = restarted_task->extensions[capture_extension_index]; |
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523 | |
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524 | /* |
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525 | * The task ponters may not be known as the task may have |
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526 | * been created before the capture engine was open. Add them. |
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527 | */ |
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528 | |
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529 | if (ct == NULL) |
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530 | ct = rtems_capture_create_capture_task (current_task); |
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531 | |
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532 | if (rt == NULL) |
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533 | rt = rtems_capture_create_capture_task (restarted_task); |
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534 | |
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535 | rtems_capture_record (ct, RTEMS_CAPTURE_RESTARTED_BY_EVENT); |
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536 | rtems_capture_record (rt, RTEMS_CAPTURE_RESTARTED_EVENT); |
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537 | |
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538 | rtems_capture_task_stack_usage (rt); |
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539 | rtems_capture_init_stack_usage (rt); |
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540 | } |
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541 | |
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542 | /* |
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543 | * rtems_capture_delete_task |
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544 | * |
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545 | * DESCRIPTION: |
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546 | * |
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547 | * This function is called when a task is deleted. |
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548 | * |
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549 | */ |
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550 | static rtems_extension |
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551 | rtems_capture_delete_task (rtems_tcb* current_task, |
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552 | rtems_tcb* deleted_task) |
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553 | { |
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554 | /* |
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555 | * Get the capture task control block so we can trace this |
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556 | * event. |
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557 | */ |
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558 | rtems_capture_task_t* ct; |
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559 | rtems_capture_task_t* dt; |
---|
560 | |
---|
561 | /* |
---|
562 | * The task ponters may not be known as the task may have |
---|
563 | * been created before the capture engine was open. Add them. |
---|
564 | */ |
---|
565 | |
---|
566 | ct = current_task->extensions[capture_extension_index]; |
---|
567 | dt = deleted_task->extensions[capture_extension_index]; |
---|
568 | |
---|
569 | if (ct == NULL) |
---|
570 | ct = rtems_capture_create_capture_task (current_task); |
---|
571 | |
---|
572 | if (dt == NULL) |
---|
573 | dt = rtems_capture_create_capture_task (deleted_task); |
---|
574 | |
---|
575 | rtems_capture_record (ct, RTEMS_CAPTURE_DELETED_BY_EVENT); |
---|
576 | rtems_capture_record (dt, RTEMS_CAPTURE_DELETED_EVENT); |
---|
577 | |
---|
578 | rtems_capture_task_stack_usage (dt); |
---|
579 | |
---|
580 | /* |
---|
581 | * This task's tcb will be invalid. |
---|
582 | */ |
---|
583 | dt->tcb = 0; |
---|
584 | } |
---|
585 | |
---|
586 | /* |
---|
587 | * rtems_capture_begin_task |
---|
588 | * |
---|
589 | * DESCRIPTION: |
---|
590 | * |
---|
591 | * This function is called when a task is begun. |
---|
592 | * |
---|
593 | */ |
---|
594 | static rtems_extension |
---|
595 | rtems_capture_begin_task (rtems_tcb* begin_task) |
---|
596 | { |
---|
597 | /* |
---|
598 | * Get the capture task control block so we can trace this |
---|
599 | * event. |
---|
600 | */ |
---|
601 | rtems_capture_task_t* bt; |
---|
602 | |
---|
603 | bt = begin_task->extensions[capture_extension_index]; |
---|
604 | |
---|
605 | /* |
---|
606 | * The task ponters may not be known as the task may have |
---|
607 | * been created before the capture engine was open. Add them. |
---|
608 | */ |
---|
609 | |
---|
610 | if (bt == NULL) |
---|
611 | bt = rtems_capture_create_capture_task (begin_task); |
---|
612 | |
---|
613 | rtems_capture_record (bt, RTEMS_CAPTURE_BEGIN_EVENT); |
---|
614 | } |
---|
615 | |
---|
616 | /* |
---|
617 | * rtems_capture_exitted_task |
---|
618 | * |
---|
619 | * DESCRIPTION: |
---|
620 | * |
---|
621 | * This function is called when a task is exitted. That is |
---|
622 | * returned rather than was deleted. |
---|
623 | * |
---|
624 | */ |
---|
625 | static rtems_extension |
---|
626 | rtems_capture_exitted_task (rtems_tcb* exitted_task) |
---|
627 | { |
---|
628 | /* |
---|
629 | * Get the capture task control block so we can trace this |
---|
630 | * event. |
---|
631 | */ |
---|
632 | rtems_capture_task_t* et; |
---|
633 | |
---|
634 | et = exitted_task->extensions[capture_extension_index]; |
---|
635 | |
---|
636 | /* |
---|
637 | * The task ponters may not be known as the task may have |
---|
638 | * been created before the capture engine was open. Add them. |
---|
639 | */ |
---|
640 | |
---|
641 | if (et == NULL) |
---|
642 | et = rtems_capture_create_capture_task (exitted_task); |
---|
643 | |
---|
644 | rtems_capture_record (et, RTEMS_CAPTURE_EXITTED_EVENT); |
---|
645 | |
---|
646 | rtems_capture_task_stack_usage (et); |
---|
647 | } |
---|
648 | |
---|
649 | /* |
---|
650 | * rtems_capture_switch_task |
---|
651 | * |
---|
652 | * DESCRIPTION: |
---|
653 | * |
---|
654 | * This function is called when a context is switched. |
---|
655 | * |
---|
656 | */ |
---|
657 | static rtems_extension |
---|
658 | rtems_capture_switch_task (rtems_tcb* current_task, |
---|
659 | rtems_tcb* heir_task) |
---|
660 | { |
---|
661 | /* |
---|
662 | * Only perform context switch trace processing if tracing is |
---|
663 | * enabled. |
---|
664 | */ |
---|
665 | if (capture_flags & RTEMS_CAPTURE_ON) |
---|
666 | { |
---|
667 | rtems_unsigned32 ticks; |
---|
668 | rtems_unsigned32 tick_offset; |
---|
669 | |
---|
670 | /* |
---|
671 | * Get the cpature task control block so we can update the |
---|
672 | * reference anbd perform any watch or trigger functions. |
---|
673 | * The task ponters may not be known as the task may have |
---|
674 | * been created before the capture engine was open. Add them. |
---|
675 | */ |
---|
676 | rtems_capture_task_t* ct; |
---|
677 | rtems_capture_task_t* ht; |
---|
678 | |
---|
679 | if (_States_Is_transient (current_task->current_state)) |
---|
680 | { |
---|
681 | rtems_id ct_id = current_task->Object.id; |
---|
682 | |
---|
683 | for (ct = capture_tasks; ct; ct = ct->next) |
---|
684 | if (ct->id == ct_id) |
---|
685 | break; |
---|
686 | } |
---|
687 | else |
---|
688 | { |
---|
689 | ct = current_task->extensions[capture_extension_index]; |
---|
690 | |
---|
691 | if (ct == NULL) |
---|
692 | ct = rtems_capture_create_capture_task (current_task); |
---|
693 | } |
---|
694 | |
---|
695 | ht = heir_task->extensions[capture_extension_index]; |
---|
696 | |
---|
697 | if (ht == NULL) |
---|
698 | ht = rtems_capture_create_capture_task (heir_task); |
---|
699 | |
---|
700 | /* |
---|
701 | * Update the execution time. Assume the tick will not overflow |
---|
702 | * for now. This may need to change. |
---|
703 | */ |
---|
704 | rtems_capture_get_time (&ticks, &tick_offset); |
---|
705 | |
---|
706 | /* |
---|
707 | * We could end up with null pointers for both the current task |
---|
708 | * and the heir task. |
---|
709 | */ |
---|
710 | |
---|
711 | if (ht) |
---|
712 | { |
---|
713 | ht->in++; |
---|
714 | ht->ticks_in = ticks; |
---|
715 | ht->tick_offset_in = tick_offset; |
---|
716 | } |
---|
717 | |
---|
718 | if (ct) |
---|
719 | { |
---|
720 | ct->out++; |
---|
721 | ct->ticks += ticks - ct->ticks_in; |
---|
722 | |
---|
723 | if (capture_timestamp) |
---|
724 | { |
---|
725 | tick_offset += capture_tick_period - ct->tick_offset_in; |
---|
726 | |
---|
727 | if (tick_offset < capture_tick_period) |
---|
728 | ct->tick_offset = tick_offset; |
---|
729 | else |
---|
730 | { |
---|
731 | ct->ticks++; |
---|
732 | ct->tick_offset = tick_offset - capture_tick_period; |
---|
733 | } |
---|
734 | } |
---|
735 | else |
---|
736 | { |
---|
737 | ct->tick_offset += 100; |
---|
738 | } |
---|
739 | } |
---|
740 | |
---|
741 | /* |
---|
742 | * If we have not triggered then see if this is a trigger condition. |
---|
743 | */ |
---|
744 | if (!(capture_flags & RTEMS_CAPTURE_TRIGGERED)) |
---|
745 | { |
---|
746 | rtems_capture_control_t* cc = NULL; |
---|
747 | rtems_capture_control_t* hc = NULL; |
---|
748 | |
---|
749 | if (ct) |
---|
750 | { |
---|
751 | cc = ct->control; |
---|
752 | |
---|
753 | /* |
---|
754 | * Check the current task for a TO_ANY trigger. |
---|
755 | */ |
---|
756 | if (cc && (cc->flags & RTEMS_CAPTURE_TO_ANY)) |
---|
757 | { |
---|
758 | capture_flags |= RTEMS_CAPTURE_TRIGGERED; |
---|
759 | goto triggered; |
---|
760 | } |
---|
761 | } |
---|
762 | |
---|
763 | if (ht) |
---|
764 | { |
---|
765 | hc = ht->control; |
---|
766 | |
---|
767 | /* |
---|
768 | * Check the next task for a FROM_ANY. |
---|
769 | */ |
---|
770 | if (hc && (hc->flags & RTEMS_CAPTURE_FROM_ANY)) |
---|
771 | { |
---|
772 | capture_flags |= RTEMS_CAPTURE_TRIGGERED; |
---|
773 | goto triggered; |
---|
774 | } |
---|
775 | } |
---|
776 | |
---|
777 | /* |
---|
778 | * Check is the trigger is from the current task |
---|
779 | * to the next task. |
---|
780 | */ |
---|
781 | if (cc && hc && (hc->flags & RTEMS_CAPTURE_FROM_TO)) |
---|
782 | if (rtems_capture_name_in_group (cc->name, hc->from)) |
---|
783 | { |
---|
784 | capture_flags |= RTEMS_CAPTURE_TRIGGERED; |
---|
785 | goto triggered; |
---|
786 | } |
---|
787 | } |
---|
788 | else |
---|
789 | { |
---|
790 | triggered: |
---|
791 | |
---|
792 | rtems_capture_record (ct, RTEMS_CAPTURE_SWITCHED_OUT_EVENT); |
---|
793 | rtems_capture_record (ht, RTEMS_CAPTURE_SWITCHED_IN_EVENT); |
---|
794 | } |
---|
795 | } |
---|
796 | } |
---|
797 | |
---|
798 | /* |
---|
799 | * rtems_capture_open |
---|
800 | * |
---|
801 | * DESCRIPTION: |
---|
802 | * |
---|
803 | * This function initialises the realtime capture engine allocating the trace |
---|
804 | * buffer. It is assumed we have a working heap at stage of initialisation. |
---|
805 | * |
---|
806 | */ |
---|
807 | rtems_status_code |
---|
808 | rtems_capture_open (rtems_unsigned32 size, rtems_capture_timestamp timestamp) |
---|
809 | { |
---|
810 | rtems_extensions_table capture_extensions; |
---|
811 | rtems_name name; |
---|
812 | rtems_status_code sc; |
---|
813 | |
---|
814 | /* |
---|
815 | * See if the capture engine is already open. |
---|
816 | */ |
---|
817 | |
---|
818 | if (capture_records) |
---|
819 | return RTEMS_RESOURCE_IN_USE; |
---|
820 | |
---|
821 | capture_records = malloc (size * sizeof (rtems_capture_record_t)); |
---|
822 | |
---|
823 | if (capture_records == NULL) |
---|
824 | return RTEMS_NO_MEMORY; |
---|
825 | |
---|
826 | capture_size = size; |
---|
827 | capture_count = 0; |
---|
828 | capture_in = capture_records; |
---|
829 | capture_out = 0; |
---|
830 | capture_flags = 0; |
---|
831 | capture_tasks = NULL; |
---|
832 | capture_ceiling = 0; |
---|
833 | capture_floor = 255; |
---|
834 | |
---|
835 | /* |
---|
836 | * Create the extension table. This is copied so we |
---|
837 | * can create it as a local. |
---|
838 | */ |
---|
839 | capture_extensions.thread_create = rtems_capture_create_task; |
---|
840 | capture_extensions.thread_start = rtems_capture_start_task; |
---|
841 | capture_extensions.thread_restart = rtems_capture_restart_task; |
---|
842 | capture_extensions.thread_delete = rtems_capture_delete_task; |
---|
843 | capture_extensions.thread_switch = rtems_capture_switch_task; |
---|
844 | capture_extensions.thread_begin = rtems_capture_begin_task; |
---|
845 | capture_extensions.thread_exitted = rtems_capture_exitted_task; |
---|
846 | capture_extensions.fatal = NULL; |
---|
847 | |
---|
848 | /* |
---|
849 | * Get the tick period from the BSP Configuration Table. |
---|
850 | */ |
---|
851 | capture_tick_period = _Configuration_Table->microseconds_per_tick; |
---|
852 | |
---|
853 | /* |
---|
854 | * Register the user extension handlers for the CAPture Engine. |
---|
855 | */ |
---|
856 | name = rtems_build_name ('C', 'A', 'P', 'E'); |
---|
857 | sc = rtems_extension_create (name, &capture_extensions, &capture_id); |
---|
858 | |
---|
859 | if (sc != RTEMS_SUCCESSFUL) |
---|
860 | { |
---|
861 | capture_id = 0; |
---|
862 | free (capture_records); |
---|
863 | capture_records = NULL; |
---|
864 | } |
---|
865 | else |
---|
866 | { |
---|
867 | capture_extension_index = rtems_get_index (capture_id);; |
---|
868 | } |
---|
869 | |
---|
870 | /* |
---|
871 | * Iterate over the list of existing tasks. |
---|
872 | */ |
---|
873 | |
---|
874 | return sc; |
---|
875 | } |
---|
876 | |
---|
877 | /* |
---|
878 | * rtems_capture_close |
---|
879 | * |
---|
880 | * DESCRIPTION: |
---|
881 | * |
---|
882 | * This function shutdowns the capture engine and release any claimed |
---|
883 | * resources. |
---|
884 | */ |
---|
885 | rtems_status_code |
---|
886 | rtems_capture_close () |
---|
887 | { |
---|
888 | rtems_interrupt_level level; |
---|
889 | rtems_capture_task_t* task; |
---|
890 | rtems_capture_control_t* control; |
---|
891 | rtems_capture_record_t* records; |
---|
892 | rtems_status_code sc; |
---|
893 | |
---|
894 | rtems_interrupt_disable (level); |
---|
895 | |
---|
896 | if (!capture_records) |
---|
897 | { |
---|
898 | rtems_interrupt_enable (level); |
---|
899 | return RTEMS_SUCCESSFUL; |
---|
900 | } |
---|
901 | |
---|
902 | capture_flags &= ~RTEMS_CAPTURE_ON; |
---|
903 | |
---|
904 | records = capture_records; |
---|
905 | capture_records = NULL; |
---|
906 | |
---|
907 | rtems_interrupt_enable (level); |
---|
908 | |
---|
909 | /* |
---|
910 | * Delete the extension first. This means we are now able to |
---|
911 | * release the resources we have without them being used. |
---|
912 | */ |
---|
913 | |
---|
914 | sc = rtems_extension_delete (capture_id); |
---|
915 | |
---|
916 | if (sc != RTEMS_SUCCESSFUL) |
---|
917 | return sc; |
---|
918 | |
---|
919 | task = capture_tasks; |
---|
920 | |
---|
921 | while (task) |
---|
922 | { |
---|
923 | rtems_capture_task_t* delete = task; |
---|
924 | task = task->next; |
---|
925 | _Workspace_Free (delete); |
---|
926 | } |
---|
927 | |
---|
928 | capture_tasks = NULL; |
---|
929 | |
---|
930 | control = capture_controls; |
---|
931 | |
---|
932 | while (control) |
---|
933 | { |
---|
934 | rtems_capture_control_t* delete = control; |
---|
935 | control = control->next; |
---|
936 | _Workspace_Free (delete); |
---|
937 | } |
---|
938 | |
---|
939 | capture_controls = NULL; |
---|
940 | |
---|
941 | if (capture_records) |
---|
942 | { |
---|
943 | free (capture_records); |
---|
944 | capture_records = NULL; |
---|
945 | } |
---|
946 | |
---|
947 | return RTEMS_SUCCESSFUL; |
---|
948 | } |
---|
949 | |
---|
950 | /* |
---|
951 | * rtems_capture_control |
---|
952 | * |
---|
953 | * DESCRIPTION: |
---|
954 | * |
---|
955 | * This function allows control of tracing at a global level. |
---|
956 | */ |
---|
957 | rtems_status_code |
---|
958 | rtems_capture_control (rtems_boolean enable) |
---|
959 | { |
---|
960 | rtems_interrupt_level level; |
---|
961 | |
---|
962 | rtems_interrupt_disable (level); |
---|
963 | |
---|
964 | if (!capture_records) |
---|
965 | { |
---|
966 | rtems_interrupt_enable (level); |
---|
967 | return RTEMS_UNSATISFIED; |
---|
968 | } |
---|
969 | |
---|
970 | if (enable) |
---|
971 | capture_flags |= RTEMS_CAPTURE_ON; |
---|
972 | else |
---|
973 | capture_flags &= ~RTEMS_CAPTURE_ON; |
---|
974 | |
---|
975 | rtems_interrupt_enable (level); |
---|
976 | |
---|
977 | return RTEMS_SUCCESSFUL; |
---|
978 | } |
---|
979 | |
---|
980 | /* |
---|
981 | * rtems_capture_flush |
---|
982 | * |
---|
983 | * DESCRIPTION: |
---|
984 | * |
---|
985 | * This function flushes the capture buffer. The prime parameter allows the |
---|
986 | * capture engine to also be primed again. |
---|
987 | */ |
---|
988 | rtems_status_code |
---|
989 | rtems_capture_flush (rtems_boolean prime) |
---|
990 | { |
---|
991 | rtems_interrupt_level level; |
---|
992 | rtems_capture_task_t* task; |
---|
993 | |
---|
994 | rtems_interrupt_disable (level); |
---|
995 | |
---|
996 | for (task = capture_tasks; task != NULL; task = task->next) |
---|
997 | task->flags &= ~RTEMS_CAPTURE_TRACED; |
---|
998 | |
---|
999 | if (prime) |
---|
1000 | capture_flags &= ~(RTEMS_CAPTURE_TRIGGERED | RTEMS_CAPTURE_OVERFLOW); |
---|
1001 | else |
---|
1002 | capture_flags &= ~RTEMS_CAPTURE_OVERFLOW; |
---|
1003 | |
---|
1004 | capture_in = capture_records; |
---|
1005 | capture_out = 0; |
---|
1006 | |
---|
1007 | rtems_interrupt_enable (level); |
---|
1008 | |
---|
1009 | return RTEMS_SUCCESSFUL; |
---|
1010 | } |
---|
1011 | |
---|
1012 | /* |
---|
1013 | * rtems_capture_watch_add |
---|
1014 | * |
---|
1015 | * DESCRIPTION: |
---|
1016 | * |
---|
1017 | * This function defines a watch for a specific task given a name. A watch |
---|
1018 | * causes it to be traced either in or out of context. The watch can be |
---|
1019 | * optionally enabled or disabled with the set routine. It is disabled by |
---|
1020 | * default. |
---|
1021 | */ |
---|
1022 | rtems_status_code |
---|
1023 | rtems_capture_watch_add (rtems_name name, rtems_id id) |
---|
1024 | { |
---|
1025 | rtems_capture_control_t* control; |
---|
1026 | |
---|
1027 | if ((name == 0) && (id == 0)) |
---|
1028 | return RTEMS_UNSATISFIED; |
---|
1029 | |
---|
1030 | control = rtems_capture_find_control (name, id); |
---|
1031 | |
---|
1032 | if (control && !id) |
---|
1033 | return RTEMS_TOO_MANY; |
---|
1034 | |
---|
1035 | if (!control) |
---|
1036 | control = rtems_capture_create_control (name, id); |
---|
1037 | |
---|
1038 | if (!control) |
---|
1039 | return RTEMS_NO_MEMORY; |
---|
1040 | |
---|
1041 | return RTEMS_SUCCESSFUL; |
---|
1042 | } |
---|
1043 | |
---|
1044 | /* |
---|
1045 | * rtems_capture_watch_del |
---|
1046 | * |
---|
1047 | * DESCRIPTION: |
---|
1048 | * |
---|
1049 | * This function removes a watch for a specific task given a name. The task |
---|
1050 | * description will still exist if referenced by a trace record in the trace |
---|
1051 | * buffer or a global watch is defined. |
---|
1052 | */ |
---|
1053 | rtems_status_code |
---|
1054 | rtems_capture_watch_del (rtems_name name, rtems_id id) |
---|
1055 | { |
---|
1056 | rtems_interrupt_level level; |
---|
1057 | rtems_capture_control_t* control; |
---|
1058 | rtems_capture_control_t** prev_control; |
---|
1059 | rtems_capture_task_t* task; |
---|
1060 | rtems_boolean found = 0; |
---|
1061 | |
---|
1062 | /* |
---|
1063 | * Should this test be for wildcards ? |
---|
1064 | */ |
---|
1065 | |
---|
1066 | for (prev_control = &capture_controls, control = capture_controls; |
---|
1067 | control != NULL; ) |
---|
1068 | { |
---|
1069 | if (rtems_capture_match_name_id (name, id, control->name, control->id)) |
---|
1070 | { |
---|
1071 | rtems_interrupt_disable (level); |
---|
1072 | |
---|
1073 | for (task = capture_tasks; task != NULL; task = task->next) |
---|
1074 | if (task->control == control) |
---|
1075 | task->control = 0; |
---|
1076 | |
---|
1077 | *prev_control = control->next; |
---|
1078 | |
---|
1079 | rtems_interrupt_enable (level); |
---|
1080 | |
---|
1081 | _Workspace_Free (control); |
---|
1082 | |
---|
1083 | control = *prev_control; |
---|
1084 | |
---|
1085 | found = 1; |
---|
1086 | } |
---|
1087 | else |
---|
1088 | { |
---|
1089 | prev_control = &control->next; |
---|
1090 | control = control->next; |
---|
1091 | } |
---|
1092 | } |
---|
1093 | |
---|
1094 | if (found) |
---|
1095 | return RTEMS_SUCCESSFUL; |
---|
1096 | |
---|
1097 | return RTEMS_INVALID_NAME; |
---|
1098 | } |
---|
1099 | |
---|
1100 | /* |
---|
1101 | * rtems_capture_watch_set |
---|
1102 | * |
---|
1103 | * DESCRIPTION: |
---|
1104 | * |
---|
1105 | * This function allows control of a watch. The watch can be enabled or |
---|
1106 | * disabled. |
---|
1107 | */ |
---|
1108 | rtems_status_code |
---|
1109 | rtems_capture_watch_ctrl (rtems_name name, rtems_id id, rtems_boolean enable) |
---|
1110 | { |
---|
1111 | rtems_interrupt_level level; |
---|
1112 | rtems_capture_control_t* control; |
---|
1113 | rtems_boolean found = 0; |
---|
1114 | |
---|
1115 | /* |
---|
1116 | * Find the control and then set the watch. It must exist before it can |
---|
1117 | * be controlled. |
---|
1118 | */ |
---|
1119 | for (control = capture_controls; control != NULL; control = control->next) |
---|
1120 | { |
---|
1121 | if (rtems_capture_match_name_id (name, id, control->name, control->id)) |
---|
1122 | { |
---|
1123 | rtems_interrupt_disable (level); |
---|
1124 | |
---|
1125 | if (enable) |
---|
1126 | control->flags |= RTEMS_CAPTURE_WATCH; |
---|
1127 | else |
---|
1128 | control->flags &= ~RTEMS_CAPTURE_WATCH; |
---|
1129 | |
---|
1130 | rtems_interrupt_enable (level); |
---|
1131 | |
---|
1132 | found = 1; |
---|
1133 | } |
---|
1134 | } |
---|
1135 | |
---|
1136 | if (found) |
---|
1137 | return RTEMS_SUCCESSFUL; |
---|
1138 | |
---|
1139 | return RTEMS_INVALID_NAME; |
---|
1140 | } |
---|
1141 | |
---|
1142 | /* |
---|
1143 | * rtems_capture_watch_global |
---|
1144 | * |
---|
1145 | * DESCRIPTION: |
---|
1146 | * |
---|
1147 | * This function allows control of a global watch. The watch can be enabled or |
---|
1148 | * disabled. A global watch configures all tasks below the ceiling and above |
---|
1149 | * the floor to be traced. |
---|
1150 | */ |
---|
1151 | rtems_status_code |
---|
1152 | rtems_capture_watch_global (rtems_boolean enable) |
---|
1153 | { |
---|
1154 | rtems_interrupt_level level; |
---|
1155 | |
---|
1156 | rtems_interrupt_disable (level); |
---|
1157 | |
---|
1158 | /* |
---|
1159 | * We need to keep specific and global watches separate so |
---|
1160 | * a global enable/disable does not lose a specific watch. |
---|
1161 | */ |
---|
1162 | if (enable) |
---|
1163 | capture_flags |= RTEMS_CAPTURE_GLOBAL_WATCH; |
---|
1164 | else |
---|
1165 | capture_flags &= ~RTEMS_CAPTURE_GLOBAL_WATCH; |
---|
1166 | |
---|
1167 | rtems_interrupt_enable (level); |
---|
1168 | |
---|
1169 | return RTEMS_SUCCESSFUL; |
---|
1170 | } |
---|
1171 | |
---|
1172 | /* |
---|
1173 | * rtems_capture_watch_global_on |
---|
1174 | * |
---|
1175 | * DESCRIPTION: |
---|
1176 | * |
---|
1177 | * This function returns the global watch state. |
---|
1178 | */ |
---|
1179 | rtems_boolean |
---|
1180 | rtems_capture_watch_global_on () |
---|
1181 | { |
---|
1182 | return capture_flags & RTEMS_CAPTURE_GLOBAL_WATCH ? 1 : 0; |
---|
1183 | } |
---|
1184 | |
---|
1185 | /* |
---|
1186 | * rtems_capture_watch_ceiling |
---|
1187 | * |
---|
1188 | * DESCRIPTION: |
---|
1189 | * |
---|
1190 | * This function sets a watch ceiling. Tasks at or greating that the |
---|
1191 | * ceiling priority are not watched. This is a simple way to monitor |
---|
1192 | * an application and exclude system tasks running at a higher |
---|
1193 | * priority level. |
---|
1194 | */ |
---|
1195 | rtems_status_code |
---|
1196 | rtems_capture_watch_ceiling (rtems_task_priority ceiling) |
---|
1197 | { |
---|
1198 | capture_ceiling = ceiling; |
---|
1199 | return RTEMS_SUCCESSFUL; |
---|
1200 | } |
---|
1201 | |
---|
1202 | /* |
---|
1203 | * rtems_capture_watch_get_ceiling |
---|
1204 | * |
---|
1205 | * DESCRIPTION: |
---|
1206 | * |
---|
1207 | * This function gets the watch ceiling. |
---|
1208 | */ |
---|
1209 | rtems_task_priority |
---|
1210 | rtems_capture_watch_get_ceiling () |
---|
1211 | { |
---|
1212 | return capture_ceiling; |
---|
1213 | } |
---|
1214 | |
---|
1215 | /* |
---|
1216 | * rtems_capture_watch_floor |
---|
1217 | * |
---|
1218 | * DESCRIPTION: |
---|
1219 | * |
---|
1220 | * This function sets a watch floor. Tasks at or less that the |
---|
1221 | * floor priority are not watched. This is a simple way to monitor |
---|
1222 | * an application and exclude system tasks running at a lower |
---|
1223 | * priority level. |
---|
1224 | */ |
---|
1225 | rtems_status_code |
---|
1226 | rtems_capture_watch_floor (rtems_task_priority floor) |
---|
1227 | { |
---|
1228 | capture_floor = floor; |
---|
1229 | return RTEMS_SUCCESSFUL; |
---|
1230 | } |
---|
1231 | |
---|
1232 | /* |
---|
1233 | * rtems_capture_watch_get_floor |
---|
1234 | * |
---|
1235 | * DESCRIPTION: |
---|
1236 | * |
---|
1237 | * This function gets the watch floor. |
---|
1238 | */ |
---|
1239 | rtems_task_priority |
---|
1240 | rtems_capture_watch_get_floor () |
---|
1241 | { |
---|
1242 | return capture_floor; |
---|
1243 | } |
---|
1244 | |
---|
1245 | /* |
---|
1246 | * rtems_capture_set_trigger |
---|
1247 | * |
---|
1248 | * DESCRIPTION: |
---|
1249 | * |
---|
1250 | * This function sets an edge trigger. Left is the left side of |
---|
1251 | * the edge and right is right side of the edge. The trigger type |
---|
1252 | * can be - |
---|
1253 | * |
---|
1254 | * FROM_ANY : a switch from any task to the right side of the edge. |
---|
1255 | * TO_ANY : a switch from the left side of the edge to any task. |
---|
1256 | * FROM_TO : a switch from the left side of the edge to the right |
---|
1257 | * side of the edge. |
---|
1258 | * |
---|
1259 | * This set trigger routine will create a capture control for the |
---|
1260 | * target task. The task list is searched and any existing tasks |
---|
1261 | * are linked to the new control. |
---|
1262 | * |
---|
1263 | * We can have a number of tasks that have the same name so we |
---|
1264 | * search using names. This means a number of tasks can be |
---|
1265 | * linked to single control. |
---|
1266 | */ |
---|
1267 | rtems_status_code |
---|
1268 | rtems_capture_set_trigger (rtems_name from, |
---|
1269 | rtems_id from_id, |
---|
1270 | rtems_name to, |
---|
1271 | rtems_id to_id, |
---|
1272 | rtems_capture_trigger_t trigger) |
---|
1273 | { |
---|
1274 | rtems_capture_control_t* control; |
---|
1275 | int i; |
---|
1276 | |
---|
1277 | /* |
---|
1278 | * Find the capture control blocks for the from and to |
---|
1279 | * tasks. |
---|
1280 | */ |
---|
1281 | if (trigger == rtems_capture_to_any) |
---|
1282 | { |
---|
1283 | control = rtems_capture_create_control (from, from_id); |
---|
1284 | if (control == NULL) |
---|
1285 | return RTEMS_NO_MEMORY; |
---|
1286 | control->flags |= RTEMS_CAPTURE_TO_ANY; |
---|
1287 | } |
---|
1288 | |
---|
1289 | if ((trigger == rtems_capture_from_to) || |
---|
1290 | (trigger == rtems_capture_from_any)) |
---|
1291 | { |
---|
1292 | control = rtems_capture_create_control (to, to_id); |
---|
1293 | if (control == NULL) |
---|
1294 | return RTEMS_NO_MEMORY; |
---|
1295 | |
---|
1296 | if (trigger == rtems_capture_from_any) |
---|
1297 | control->flags |= RTEMS_CAPTURE_FROM_ANY; |
---|
1298 | else |
---|
1299 | { |
---|
1300 | control->flags |= RTEMS_CAPTURE_FROM_TO; |
---|
1301 | for (i = 0; i < RTEMS_CAPTURE_TRIGGER_TASKS; i++) |
---|
1302 | { |
---|
1303 | if (control->from[i] == 0) |
---|
1304 | { |
---|
1305 | control->from[i] = from; |
---|
1306 | control->from_id[i] = from_id; |
---|
1307 | break; |
---|
1308 | } |
---|
1309 | } |
---|
1310 | } |
---|
1311 | } |
---|
1312 | return RTEMS_SUCCESSFUL; |
---|
1313 | } |
---|
1314 | |
---|
1315 | /* |
---|
1316 | * rtems_capture_read |
---|
1317 | * |
---|
1318 | * DESCRIPTION: |
---|
1319 | * |
---|
1320 | * This function reads a number of records from the capture buffer. |
---|
1321 | * The user can optionally block and wait until the buffer as a |
---|
1322 | * specific number of records available or a specific time has |
---|
1323 | * elasped. |
---|
1324 | * |
---|
1325 | * The function returns the number of record that is has that are |
---|
1326 | * in a continous block of memory. If the number of available records |
---|
1327 | * wrap then only those records are provided. This removes the need for |
---|
1328 | * caller to be concerned about buffer wrappings. If the number of |
---|
1329 | * requested records cannot be met due to the wrapping of the records |
---|
1330 | * less than the specified number will be returned. |
---|
1331 | * |
---|
1332 | * The user must release the records. This is achieved with a call to |
---|
1333 | * rtems_capture_release. Calls this function without a release will |
---|
1334 | * result in at least the same number of records being released. |
---|
1335 | * |
---|
1336 | * The 'threshold' parameter is the number of records that must be |
---|
1337 | * captured before returning. If a timeout period is specified (non-0) |
---|
1338 | * any captured records will be returned. These parameters stop |
---|
1339 | * thrashing occuring for a small number of records, yet allows |
---|
1340 | * a user configured latiency to be applied for single events. |
---|
1341 | * |
---|
1342 | * The 'timeout' parameter is in micro-seconds. A value of 0 will disable |
---|
1343 | * the timeout. |
---|
1344 | * |
---|
1345 | */ |
---|
1346 | rtems_status_code |
---|
1347 | rtems_capture_read (rtems_unsigned32 threshold, |
---|
1348 | rtems_unsigned32 timeout, |
---|
1349 | rtems_unsigned32* read, |
---|
1350 | rtems_capture_record_t** recs) |
---|
1351 | { |
---|
1352 | rtems_interrupt_level level; |
---|
1353 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
1354 | rtems_unsigned32 count; |
---|
1355 | |
---|
1356 | *read = 0; |
---|
1357 | *recs = NULL; |
---|
1358 | |
---|
1359 | rtems_interrupt_disable (level); |
---|
1360 | |
---|
1361 | /* |
---|
1362 | * Only one reader is allowed. |
---|
1363 | */ |
---|
1364 | |
---|
1365 | if (capture_flags & RTEMS_CAPTURE_READER_ACTIVE) |
---|
1366 | { |
---|
1367 | rtems_interrupt_enable (level); |
---|
1368 | return RTEMS_RESOURCE_IN_USE; |
---|
1369 | } |
---|
1370 | |
---|
1371 | capture_flags |= RTEMS_CAPTURE_READER_ACTIVE; |
---|
1372 | *read = count = capture_count; |
---|
1373 | |
---|
1374 | rtems_interrupt_enable (level); |
---|
1375 | |
---|
1376 | *recs = &capture_records[capture_out]; |
---|
1377 | |
---|
1378 | for (;;) |
---|
1379 | { |
---|
1380 | /* |
---|
1381 | * See if the count wraps the end of the record buffer. |
---|
1382 | */ |
---|
1383 | if (count && ((capture_out + count) >= capture_size)) |
---|
1384 | *read = capture_size - capture_out; |
---|
1385 | |
---|
1386 | /* |
---|
1387 | * Do we have a threshold and the current count has not wrapped |
---|
1388 | * around the end of the capture record buffer ? |
---|
1389 | */ |
---|
1390 | if ((*read == count) && threshold) |
---|
1391 | { |
---|
1392 | /* |
---|
1393 | * Do we have enough records ? |
---|
1394 | */ |
---|
1395 | if (*read < threshold) |
---|
1396 | { |
---|
1397 | rtems_event_set event_out; |
---|
1398 | |
---|
1399 | rtems_task_ident (RTEMS_SELF, RTEMS_LOCAL, &capture_reader); |
---|
1400 | |
---|
1401 | rtems_interrupt_disable (level); |
---|
1402 | |
---|
1403 | capture_flags |= RTEMS_CAPTURE_READER_WAITING; |
---|
1404 | |
---|
1405 | rtems_interrupt_enable (level); |
---|
1406 | |
---|
1407 | sc = rtems_event_receive (RTEMS_EVENT_0, |
---|
1408 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
1409 | TOD_MICROSECONDS_TO_TICKS (timeout), |
---|
1410 | &event_out); |
---|
1411 | |
---|
1412 | /* |
---|
1413 | * Let the user handle all other sorts of errors. This may |
---|
1414 | * not be the best solution, but oh well, it will do for |
---|
1415 | * now. |
---|
1416 | */ |
---|
1417 | if ((sc != RTEMS_SUCCESSFUL) && (sc != RTEMS_TIMEOUT)) |
---|
1418 | break; |
---|
1419 | |
---|
1420 | rtems_interrupt_disable (level); |
---|
1421 | |
---|
1422 | *read = count = capture_count; |
---|
1423 | |
---|
1424 | rtems_interrupt_enable (level); |
---|
1425 | |
---|
1426 | continue; |
---|
1427 | } |
---|
1428 | } |
---|
1429 | |
---|
1430 | /* |
---|
1431 | * Always out if we reach here. To loop use continue. |
---|
1432 | */ |
---|
1433 | break; |
---|
1434 | } |
---|
1435 | |
---|
1436 | rtems_interrupt_disable (level); |
---|
1437 | |
---|
1438 | capture_flags &= ~RTEMS_CAPTURE_READER_ACTIVE; |
---|
1439 | |
---|
1440 | rtems_interrupt_enable (level); |
---|
1441 | |
---|
1442 | return sc; |
---|
1443 | } |
---|
1444 | |
---|
1445 | /* |
---|
1446 | * rtems_capture_release |
---|
1447 | * |
---|
1448 | * DESCRIPTION: |
---|
1449 | * |
---|
1450 | * This function releases the requested number of record slots back |
---|
1451 | * to the capture engine. The count must match the number read. |
---|
1452 | */ |
---|
1453 | rtems_status_code |
---|
1454 | rtems_capture_release (rtems_unsigned32 count) |
---|
1455 | { |
---|
1456 | rtems_interrupt_level level; |
---|
1457 | |
---|
1458 | rtems_interrupt_disable (level); |
---|
1459 | |
---|
1460 | if (count > capture_count) |
---|
1461 | count = capture_count; |
---|
1462 | |
---|
1463 | capture_count -= count; |
---|
1464 | |
---|
1465 | capture_out = (capture_count + count) % capture_size; |
---|
1466 | |
---|
1467 | rtems_interrupt_enable (level); |
---|
1468 | |
---|
1469 | return RTEMS_SUCCESSFUL; |
---|
1470 | } |
---|
1471 | |
---|
1472 | /* |
---|
1473 | * rtems_capture_tick_time |
---|
1474 | * |
---|
1475 | * DESCRIPTION: |
---|
1476 | * |
---|
1477 | * This function returns the tick period in nano-seconds. |
---|
1478 | */ |
---|
1479 | rtems_unsigned32 |
---|
1480 | rtems_capture_tick_time () |
---|
1481 | { |
---|
1482 | return capture_tick_period; |
---|
1483 | } |
---|
1484 | |
---|
1485 | /* |
---|
1486 | * rtems_capture_event_text |
---|
1487 | * |
---|
1488 | * DESCRIPTION: |
---|
1489 | * |
---|
1490 | * This function returns a string for an event based on the bit in the |
---|
1491 | * event. The functions takes the bit offset as a number not the bit |
---|
1492 | * set in a bit map. |
---|
1493 | */ |
---|
1494 | const char* |
---|
1495 | rtems_capture_event_text (int event) |
---|
1496 | { |
---|
1497 | if ((event < RTEMS_CAPTURE_EVENT_START) || (event > RTEMS_CAPTURE_EVENT_END)) |
---|
1498 | return "invalid event id"; |
---|
1499 | return capture_event_text[event - RTEMS_CAPTURE_EVENT_START]; |
---|
1500 | } |
---|
1501 | |
---|
1502 | /* |
---|
1503 | * rtems_capture_get_task_list |
---|
1504 | * |
---|
1505 | * DESCRIPTION: |
---|
1506 | * |
---|
1507 | * This function returns the head of the list of tasks that the |
---|
1508 | * capture engine has detected. |
---|
1509 | */ |
---|
1510 | rtems_capture_task_t* |
---|
1511 | rtems_capture_get_task_list () |
---|
1512 | { |
---|
1513 | return capture_tasks; |
---|
1514 | } |
---|
1515 | |
---|
1516 | /* |
---|
1517 | * rtems_capture_task_stack_usage |
---|
1518 | * |
---|
1519 | * DESCRIPTION: |
---|
1520 | * |
---|
1521 | * This function updates the stack usage. The task control block |
---|
1522 | * is updated. |
---|
1523 | */ |
---|
1524 | rtems_unsigned32 |
---|
1525 | rtems_capture_task_stack_usage (rtems_capture_task_t* task) |
---|
1526 | { |
---|
1527 | if (task->tcb) |
---|
1528 | { |
---|
1529 | rtems_unsigned32* st; |
---|
1530 | rtems_unsigned32* s; |
---|
1531 | |
---|
1532 | /* |
---|
1533 | * @todo: Assumes all stacks move the same way. |
---|
1534 | */ |
---|
1535 | st = task->tcb->Start.Initial_stack.area + task->stack_size; |
---|
1536 | s = task->tcb->Start.Initial_stack.area; |
---|
1537 | |
---|
1538 | while (s < st) |
---|
1539 | { |
---|
1540 | if (*s != 0xdeaddead) |
---|
1541 | break; |
---|
1542 | s++; |
---|
1543 | } |
---|
1544 | |
---|
1545 | task->stack_clean = |
---|
1546 | s - (rtems_unsigned32*) task->tcb->Start.Initial_stack.area; |
---|
1547 | } |
---|
1548 | |
---|
1549 | return task->stack_clean; |
---|
1550 | } |
---|
1551 | |
---|
1552 | /* |
---|
1553 | * rtems_capture_get_control_list |
---|
1554 | * |
---|
1555 | * DESCRIPTION: |
---|
1556 | * |
---|
1557 | * This function returns the head of the list of control in the |
---|
1558 | * capture engine. |
---|
1559 | */ |
---|
1560 | rtems_capture_control_t* |
---|
1561 | rtems_capture_get_control_list () |
---|
1562 | { |
---|
1563 | return capture_controls; |
---|
1564 | } |
---|
1565 | |
---|