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1 //========================================================================== |
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2 // |
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3 // thread_gdb.c |
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4 // |
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5 // A test for thread support in GDB |
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6 // |
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7 //========================================================================== |
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8 //####COPYRIGHTBEGIN#### |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Cygnus eCos Public License |
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12 // Version 1.0 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://sourceware.cygnus.com/ecos |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //========================================================================== |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): nickg |
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33 // Contributors: nickg |
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34 // Date: 1998-09-21 |
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35 // Description: GDB thread support test. |
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36 //####DESCRIPTIONEND#### |
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37 // |
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38 |
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39 #include <cyg/kernel/kapi.h> |
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40 |
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41 #include <cyg/infra/cyg_ass.h> |
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42 |
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43 #include <cyg/infra/testcase.h> |
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44 |
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45 #if defined(CYGFUN_KERNEL_API_C) && defined(CYGSEM_KERNEL_SCHED_MLQUEUE) |
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46 |
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47 // ------------------------------------------------------------------------- |
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48 |
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49 #define THREADS 10 |
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50 |
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51 #define STACKSIZE (2*1024) |
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52 |
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53 #define CONTROLLER_PRI_HI 0 |
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54 #define CONTROLLER_PRI_LO 25 |
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55 |
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56 #define WORKER_PRI 3 |
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57 #define WORKER_PRI_RANGE 20 |
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58 |
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59 |
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60 // ------------------------------------------------------------------------- |
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61 |
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62 // array of stacks for threads |
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63 char thread_stack[THREADS][STACKSIZE]; |
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64 |
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65 // array of threads. |
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66 cyg_thread thread[THREADS]; |
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67 |
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68 cyg_handle_t thread_handle[THREADS]; |
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69 |
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70 volatile cyg_uint8 worker_state; |
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71 |
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72 #define WORKER_STATE_WAIT 1 |
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73 #define WORKER_STATE_BREAK 2 |
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74 #define WORKER_STATE_EXIT 9 |
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75 |
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76 cyg_mutex_t worker_mutex; |
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77 cyg_cond_t worker_cv; |
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78 |
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79 cyg_count32 workers_asleep = 0; |
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80 |
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81 cyg_count32 thread_count[THREADS]; |
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82 |
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83 cyg_priority_t thread_pri[THREADS]; |
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84 |
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85 |
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86 |
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87 // ------------------------------------------------------------------------- |
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88 |
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89 extern void breakme(void) |
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90 { |
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91 } |
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92 |
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93 // ------------------------------------------------------------------------- |
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94 |
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95 void worker( cyg_addrword_t id ) |
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96 { |
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97 for(;;) |
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98 { |
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99 thread_count[id]++; |
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100 thread_pri[id] = cyg_thread_get_priority( cyg_thread_self() ); |
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101 |
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102 switch( worker_state ) |
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103 { |
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104 case WORKER_STATE_BREAK: |
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105 if( 0 == (id % 4) ) |
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106 breakme(); |
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107 |
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108 case WORKER_STATE_WAIT: |
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109 cyg_mutex_lock( &worker_mutex ); |
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110 workers_asleep++; |
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111 cyg_cond_wait( &worker_cv ); |
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112 workers_asleep--; |
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113 cyg_mutex_unlock( &worker_mutex ); |
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114 break; |
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115 |
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116 case WORKER_STATE_EXIT: |
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117 cyg_thread_exit(); |
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118 |
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119 } |
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120 } |
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121 } |
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122 |
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123 // ------------------------------------------------------------------------- |
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124 |
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125 void controller( cyg_addrword_t id ) |
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126 { |
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127 cyg_priority_t pri; |
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128 int i; |
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129 |
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130 cyg_mutex_init( &worker_mutex ); |
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131 cyg_cond_init( &worker_cv, &worker_mutex ); |
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132 |
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133 // 1 thread, it is running, it calls BREAKME(); |
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134 // +++ Thread status returned: |
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135 // +++ 1 thread, running, is the current one |
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136 |
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137 breakme(); |
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138 |
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139 // Create N more threads; they are all suspended after creation. Adjust |
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140 // the priorities of all the threads to lower than the controlling thread. |
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141 // Make them all be distinct priorities as far as possible. BREAKME(); |
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142 // +++ 1 thread, running, + N suspended ones of different prios. |
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143 |
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144 for( i = 1; i < THREADS; i++ ) |
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145 { |
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146 pri = CONTROLLER_PRI_HI + 1 + i % WORKER_PRI_RANGE; |
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147 |
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148 cyg_thread_create(pri, worker, (cyg_addrword_t)i, "worker", |
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149 (void *)(&thread_stack[i]), STACKSIZE, |
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150 &thread_handle[i], &thread[i]); |
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151 |
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152 } |
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153 |
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154 breakme(); |
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155 |
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156 // Adjust the priorities of all the threads to lower than the controlling |
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157 // thread. Make them all be THE SAME priority. BREAKME(); |
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158 // +++ 1 thread, running, + N suspended ones of same prio. |
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159 |
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160 for( i = 1; i < THREADS; i++ ) |
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161 { |
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162 cyg_thread_set_priority( thread_handle[i], WORKER_PRI ); |
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163 } |
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164 |
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165 breakme(); |
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166 |
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167 // Release all the N threads, BREAKME(); |
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168 // +++ 1 thread, running, + N ready ones of same prio. |
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169 |
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170 for( i = 1; i < THREADS; i++ ) |
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171 { |
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172 cyg_thread_resume( thread_handle[i] ); |
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173 } |
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174 |
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175 breakme(); |
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176 |
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177 // Adjust the priorities of all the threads, lower than the controlling |
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178 // thread. Make them all be distinct priorities as far as possible. |
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179 // BREAKME(); |
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180 // +++ 1 thread, running, + N ready ones of different prios. |
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181 |
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182 for( i = 1; i < THREADS; i++ ) |
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183 { |
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184 pri = CONTROLLER_PRI_HI + 1 + i % WORKER_PRI_RANGE; |
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185 |
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186 cyg_thread_set_priority( thread_handle[i], pri ); |
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187 } |
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188 |
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189 breakme(); |
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190 |
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191 // Command all the N threads to sleep; switch my own priority to lower |
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192 // than theirs so that they all run and sleep, then I get back in and |
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193 // BREAKME(); |
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194 // +++ 1 thread, running, + N sleeping ones of different prios. |
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195 |
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196 worker_state = WORKER_STATE_WAIT; |
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197 |
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198 cyg_thread_set_priority( thread_handle[0], CONTROLLER_PRI_LO ); |
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199 |
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200 breakme(); |
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201 |
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202 // Make them all be THE SAME priority; BREAKME(); |
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203 // +++ 1 thread, running, + N sleeping ones of same prio. |
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204 |
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205 for( i = 1; i < THREADS; i++ ) |
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206 { |
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207 cyg_thread_set_priority( thread_handle[i], WORKER_PRI ); |
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208 } |
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209 |
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210 breakme(); |
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211 |
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212 // Wake them all up, they'll loop once and sleep again; I get in and |
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213 // BREAKME(); |
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214 // +++ 1 thread, running, + N sleeping ones of same prio. |
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215 |
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216 cyg_cond_broadcast( &worker_cv ); |
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217 |
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218 breakme(); |
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219 |
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220 // Adjust the priorities of all the threads, higher than the controlling |
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221 // thread. Make them all be distinct priorities as far as possible. |
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222 // BREAKME(); |
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223 // +++ 1 thread, running, + N sleeping ones of different prios. |
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224 |
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225 for( i = 1; i < THREADS; i++ ) |
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226 { |
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227 pri = CONTROLLER_PRI_HI + 1 + i % WORKER_PRI_RANGE; |
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228 |
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229 cyg_thread_set_priority( thread_handle[i], pri ); |
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230 } |
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231 |
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232 breakme(); |
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233 |
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234 // Wake them all up, they'll loop once and sleep again; I get in and |
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235 // BREAKME(); |
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236 // +++ 1 thread, running, + N sleeping ones of different prios. |
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237 |
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238 cyg_cond_broadcast( &worker_cv ); |
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239 |
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240 breakme(); |
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241 |
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242 // Set them all the same prio, set me to the same prio, BREAKME(); |
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243 // +++ 1 running, + N sleeping, *all* the same prio. |
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244 |
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245 for( i = 0; i < THREADS; i++ ) |
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246 { |
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247 cyg_thread_set_priority( thread_handle[i], WORKER_PRI ); |
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248 } |
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249 |
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250 breakme(); |
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251 |
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252 // Wake them all up, they'll loop once and sleep again; I get in and |
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253 // BREAKME(); repeatedly until they have all slept again. |
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254 // +++ 1 running, + some sleeping, some ready, *all* the same prio. |
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255 |
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256 cyg_cond_broadcast( &worker_cv ); |
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257 |
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258 // cyg_thread_yield(); |
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259 |
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260 do |
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261 { |
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262 breakme(); |
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263 |
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264 } while( workers_asleep != THREADS-1 ); |
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265 |
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266 breakme(); |
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267 |
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268 // Suspend some of the threads, BREAKME(); |
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269 // +++ 1 running, + some sleeping, some suspended, *all* the same prio. |
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270 |
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271 for( i = 1; i < THREADS; i++ ) |
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272 { |
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273 // suspend every 3rd thread |
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274 if( 0 == (i % 3) ) cyg_thread_suspend( thread_handle[i] ); |
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275 } |
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276 |
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277 breakme(); |
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278 |
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279 |
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280 // Change the prios all different, change my prio to highest , BREAKME(); |
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281 // +++ 1 running, + some sleeping, some suspended, different prios. |
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282 |
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283 cyg_thread_set_priority( thread_handle[0], CONTROLLER_PRI_HI ); |
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284 |
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285 for( i = 1; i < THREADS; i++ ) |
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286 { |
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287 pri = CONTROLLER_PRI_HI + 1 + i % WORKER_PRI_RANGE; |
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288 |
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289 cyg_thread_set_priority( thread_handle[i], pri ); |
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290 } |
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291 |
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292 breakme(); |
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293 |
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294 // Wake up all the threads, BREAKME(); |
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295 // +++ 1 running, + some ready, some suspended/ready, different prios. |
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296 |
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297 cyg_cond_broadcast( &worker_cv ); |
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298 |
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299 breakme(); |
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300 |
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301 |
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302 // Change my prio to lowest, let all the threads run, BREAKME(). |
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303 // +++ 1 running + some sleeping, some suspended/ready, different prios. |
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304 |
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305 cyg_thread_set_priority( thread_handle[0], CONTROLLER_PRI_LO ); |
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306 |
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307 breakme(); |
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308 |
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309 // Resume all the threads, BREAKME(); |
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310 // +++ 1 running, + N ready, different prios. |
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311 |
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312 for( i = 1; i < THREADS; i++ ) |
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313 { |
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314 cyg_thread_resume( thread_handle[i] ); |
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315 } |
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316 |
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317 breakme(); |
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318 |
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319 // Command some of the N threads to call BREAKME(); themselves (then sleep |
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320 // again). Change my prio to low, so that they all get to run and hit the |
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321 // breakpoint. |
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322 // +++ A different one running every time, others in a mixture of |
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323 // ready and sleeping states. |
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324 |
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325 worker_state = WORKER_STATE_BREAK; |
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326 |
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327 cyg_cond_broadcast( &worker_cv ); |
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328 |
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329 cyg_thread_set_priority( thread_handle[0], CONTROLLER_PRI_LO ); |
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330 |
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331 breakme(); |
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332 |
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333 // Command all the threads to exit; switch my own priority to lower |
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334 // than theirs so that they all run and exit, then I get back in and |
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335 // BREAKME(); |
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336 // +++ 1 thread, running, + N dormant ones. |
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337 |
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338 worker_state = WORKER_STATE_EXIT; |
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339 |
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340 cyg_cond_broadcast( &worker_cv ); |
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341 |
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342 breakme(); |
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343 |
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344 #if 0 |
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345 |
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346 // Cannot do this yet... |
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347 |
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348 // Destroy some of the N threads to invalidate their IDs. Re-create them |
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349 // with new IDs, so that we get IDs 1,2,4,6,8,11,12,13,14,15 in use instead |
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350 // of 1,2,3,4,5,6,7,8,9, if you see what I mean. Do all the above again. |
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351 // Loop forever, or whatever... |
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352 |
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353 #endif |
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354 |
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355 breakme(); |
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356 |
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357 CYG_TEST_PASS_FINISH("GDB Thread test OK"); |
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358 |
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359 } |
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360 |
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361 // ------------------------------------------------------------------------- |
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362 |
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363 externC void |
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364 cyg_start( void ) |
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365 { |
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366 |
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367 CYG_TEST_INIT(); |
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368 |
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369 cyg_thread_create(CONTROLLER_PRI_HI, controller, (cyg_addrword_t)0, "controller", |
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370 (void *)(&thread_stack[0]), STACKSIZE, |
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371 &thread_handle[0], &thread[0]); |
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372 |
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373 // resume it |
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374 cyg_thread_resume(thread_handle[0]); |
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375 |
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376 |
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377 // Get the world going |
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378 cyg_scheduler_start(); |
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379 |
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380 CYG_TEST_FAIL_FINISH("Not reached"); |
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381 |
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382 } |
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383 |
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384 #else /* def CYGFUN_KERNEL_API_C */ |
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385 |
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386 externC void |
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387 cyg_start( void ) |
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388 { |
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389 CYG_TEST_INIT(); |
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390 CYG_TEST_PASS_FINISH("Incorrect configuration for this test"); |
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391 } |
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392 #endif /* def CYGFUN_KERNEL_API_C && !def CYGSEM_KERNEL_SCHED_MLQUEUE */ |
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393 |
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394 // ------------------------------------------------------------------------- |
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395 // EOF thread_gdb.c |
