1 | /* |
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2 | * Copyright (c) 2016-2017 Chris Johns <chrisj@rtems.org>. |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * |
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14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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24 | * SUCH DAMAGE. |
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25 | */ |
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26 | |
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27 | #include <errno.h> |
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28 | #include <inttypes.h> |
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29 | #include <stdlib.h> |
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30 | #include <stdio.h> |
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31 | |
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32 | #include <rtems.h> |
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33 | #include <rtems/assoc.h> |
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34 | #include <rtems/score/schedulerimpl.h> |
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35 | #include <rtems/score/threadimpl.h> |
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36 | |
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37 | #include <rtems/debugger/rtems-debugger-server.h> |
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38 | |
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39 | #include "rtems-debugger-target.h" |
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40 | #include "rtems-debugger-threads.h" |
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41 | |
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42 | static const char * const excludes_defaults[] = |
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43 | { |
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44 | "TIME", |
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45 | "_BSD", |
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46 | "IRQS", |
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47 | "DBSs", |
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48 | "DBSe", |
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49 | "IDLE", |
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50 | }; |
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51 | |
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52 | static void |
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53 | rtems_debugger_thread_free(rtems_debugger_threads* threads) |
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54 | { |
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55 | rtems_debugger_block_destroy(&threads->current); |
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56 | rtems_debugger_block_destroy(&threads->registers); |
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57 | rtems_debugger_block_destroy(&threads->excludes); |
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58 | rtems_debugger_block_destroy(&threads->stopped); |
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59 | rtems_debugger_block_destroy(&threads->steppers); |
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60 | threads->next = 0; |
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61 | } |
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62 | |
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63 | int |
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64 | rtems_debugger_thread_create(void) |
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65 | { |
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66 | rtems_debugger_threads* threads; |
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67 | int r; |
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68 | |
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69 | threads = calloc(1, sizeof(rtems_debugger_threads)); |
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70 | if (threads == NULL) { |
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71 | errno = ENOMEM; |
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72 | rtems_debugger_printf("error: rtems-db: thread: threads alloc: (%d) %s\n", |
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73 | errno, strerror(errno)); |
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74 | return -1; |
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75 | } |
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76 | |
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77 | r = rtems_debugger_block_create(&threads->current, |
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78 | RTEMS_DEBUGGER_THREAD_BLOCK_SIZE, |
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79 | sizeof(rtems_debugger_thread)); |
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80 | if (r < 0) { |
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81 | rtems_debugger_thread_free(threads); |
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82 | free(threads); |
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83 | rtems_debugger_printf("error: rtems-db: thread: current alloc: (%d) %s\n", |
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84 | errno, strerror(errno)); |
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85 | return -1; |
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86 | } |
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87 | |
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88 | r = rtems_debugger_block_create(&threads->registers, |
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89 | RTEMS_DEBUGGER_THREAD_BLOCK_SIZE, |
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90 | rtems_debugger_target_reg_table_size()); |
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91 | if (r < 0) { |
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92 | rtems_debugger_thread_free(threads); |
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93 | free(threads); |
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94 | rtems_debugger_printf("error: rtems-db: thread: registers alloc: (%d) %s\n", |
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95 | errno, strerror(errno)); |
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96 | return -1; |
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97 | } |
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98 | |
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99 | r = rtems_debugger_block_create(&threads->excludes, |
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100 | RTEMS_DEBUGGER_THREAD_BLOCK_SIZE, |
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101 | sizeof(rtems_id)); |
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102 | if (r < 0) { |
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103 | rtems_debugger_thread_free(threads); |
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104 | free(threads); |
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105 | rtems_debugger_printf("error: rtems-db: thread: exlcudes alloc: (%d) %s\n", |
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106 | errno, strerror(errno)); |
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107 | return -1; |
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108 | } |
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109 | |
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110 | r = rtems_debugger_block_create(&threads->stopped, |
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111 | RTEMS_DEBUGGER_THREAD_BLOCK_SIZE, |
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112 | sizeof(rtems_id)); |
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113 | if (r < 0) { |
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114 | rtems_debugger_thread_free(threads); |
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115 | free(threads); |
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116 | rtems_debugger_printf("error: rtems-db: thread: stopped alloc: (%d) %s\n", |
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117 | errno, strerror(errno)); |
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118 | return -1; |
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119 | } |
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120 | |
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121 | r = rtems_debugger_block_create(&threads->steppers, |
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122 | RTEMS_DEBUGGER_THREAD_BLOCK_SIZE, |
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123 | sizeof(rtems_debugger_thread_stepper)); |
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124 | if (r < 0) { |
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125 | rtems_debugger_thread_free(threads); |
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126 | free(threads); |
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127 | rtems_debugger_printf("error: rtems-db: thread: steppers alloc: (%d) %s\n", |
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128 | errno, strerror(errno)); |
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129 | return -1; |
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130 | } |
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131 | |
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132 | rtems_debugger->threads = threads; |
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133 | |
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134 | return rtems_debugger_thread_system_suspend(); |
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135 | } |
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136 | |
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137 | int |
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138 | rtems_debugger_thread_destroy(void) |
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139 | { |
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140 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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141 | rtems_debugger_thread_system_resume(true); |
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142 | rtems_debugger_thread_free(threads); |
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143 | free(threads); |
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144 | rtems_debugger->threads = NULL; |
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145 | return 0; |
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146 | } |
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147 | |
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148 | int |
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149 | rtems_debugger_thread_find_index(rtems_id id) |
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150 | { |
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151 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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152 | rtems_debugger_thread* current = rtems_debugger_thread_current(threads); |
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153 | int r = -1; |
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154 | if (threads != NULL) { |
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155 | size_t i; |
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156 | for (i = 0; i < threads->current.level; ++i) { |
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157 | if (id == 0 || current[i].id == id) { |
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158 | r = i; |
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159 | break; |
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160 | } |
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161 | } |
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162 | } |
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163 | return r; |
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164 | } |
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165 | |
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166 | static bool |
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167 | snapshot_thread(rtems_tcb* tcb, void* arg) |
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168 | { |
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169 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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170 | rtems_id id = tcb->Object.id; |
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171 | char name[RTEMS_DEBUGGER_THREAD_NAME_SIZE]; |
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172 | bool exclude = false; |
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173 | size_t i; |
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174 | |
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175 | /* |
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176 | * The only time the threads pointer is NULL is a realloc error so we stop |
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177 | * processing threads. There is no way to stop the iterator. |
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178 | */ |
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179 | if (rtems_debugger_thread_current(threads) == NULL) |
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180 | return true; |
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181 | |
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182 | /* |
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183 | * Filter the threads. |
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184 | */ |
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185 | switch (rtems_object_id_get_api(id)) { |
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186 | case OBJECTS_NO_API: |
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187 | case OBJECTS_INTERNAL_API: |
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188 | exclude = true; |
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189 | break; |
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190 | default: |
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191 | rtems_object_get_name(id, sizeof(name), (char*) &name[0]); |
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192 | for (i = 0; i < RTEMS_DEBUGGER_NUMOF(excludes_defaults); ++i) { |
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193 | if (strcmp(excludes_defaults[i], name) == 0) { |
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194 | exclude = true; |
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195 | break; |
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196 | } |
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197 | } |
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198 | break; |
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199 | } |
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200 | |
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201 | if (exclude) { |
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202 | rtems_id* excludes; |
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203 | int r; |
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204 | r = rtems_debugger_block_resize(&threads->excludes); |
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205 | if (r < 0) { |
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206 | rtems_debugger_thread_free(threads); |
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207 | return true; |
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208 | } |
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209 | excludes = rtems_debugger_thread_excludes(threads); |
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210 | excludes[threads->excludes.level++] = id; |
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211 | } |
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212 | else { |
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213 | rtems_debugger_thread* current; |
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214 | uint8_t* registers; |
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215 | rtems_debugger_thread* thread; |
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216 | int r; |
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217 | |
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218 | r = rtems_debugger_block_resize(&threads->current); |
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219 | if (r < 0) { |
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220 | rtems_debugger_thread_free(threads); |
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221 | return true; |
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222 | } |
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223 | r = rtems_debugger_block_resize(&threads->registers); |
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224 | if (r < 0) { |
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225 | rtems_debugger_thread_free(threads); |
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226 | return true; |
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227 | } |
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228 | |
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229 | current = rtems_debugger_thread_current(threads); |
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230 | registers = rtems_debugger_thread_registers(threads); |
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231 | |
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232 | thread = ¤t[threads->current.level++]; |
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233 | thread->registers = |
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234 | ®isters[threads->registers.level++ * rtems_debugger_target_reg_table_size()]; |
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235 | |
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236 | thread->tcb = tcb; |
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237 | thread->id = id; |
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238 | thread->flags = 0; |
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239 | thread->signal = 0; |
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240 | thread->frame = NULL; |
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241 | memcpy((void*) &thread->name[0], &name[0], sizeof(thread->name)); |
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242 | |
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243 | /* |
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244 | * See if there is a valid exception stack frame and if the thread is being |
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245 | * debugged. |
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246 | */ |
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247 | rtems_debugger_target_exception_thread(thread); |
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248 | |
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249 | /* |
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250 | * Exception threads have stopped for breakpoint, segv or other errors. |
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251 | */ |
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252 | if (rtems_debugger_thread_flag(thread, |
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253 | RTEMS_DEBUGGER_THREAD_FLAG_EXCEPTION)) { |
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254 | rtems_id* stopped; |
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255 | r = rtems_debugger_block_resize(&threads->stopped); |
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256 | if (r < 0) { |
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257 | rtems_debugger_thread_free(threads); |
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258 | return true; |
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259 | } |
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260 | stopped = rtems_debugger_thread_stopped(threads); |
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261 | stopped[threads->stopped.level++] = id; |
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262 | } |
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263 | else { |
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264 | rtems_status_code sc; |
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265 | sc = rtems_task_suspend(id); |
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266 | if (sc != RTEMS_SUCCESSFUL && sc != RTEMS_ALREADY_SUSPENDED) { |
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267 | rtems_debugger_printf("error: rtems-db: thread: suspend: %08" PRIx32 ": %s\n", |
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268 | id, rtems_status_text(sc)); |
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269 | r = -1; |
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270 | } |
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271 | } |
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272 | |
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273 | /* |
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274 | * Read the target registers into the thread register array. |
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275 | */ |
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276 | rtems_debugger_target_read_regs(thread); |
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277 | |
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278 | if (rtems_debugger_server_flag(RTEMS_DEBUGGER_FLAG_VERBOSE)) |
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279 | rtems_debugger_printf("rtems-db: sys: thd: %08" PRIx32 ": signal: %d\n", |
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280 | id, thread->signal); |
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281 | |
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282 | /* |
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283 | * Pick up the first non-zero signal. |
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284 | */ |
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285 | if (rtems_debugger->signal == 0) { |
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286 | rtems_debugger->signal = thread->signal; |
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287 | } |
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288 | } |
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289 | |
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290 | return false; |
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291 | } |
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292 | |
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293 | int |
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294 | rtems_debugger_thread_system_suspend(void) |
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295 | { |
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296 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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297 | int r = -1; |
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298 | if (threads != NULL && rtems_debugger_thread_current(threads) != NULL) { |
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299 | if (rtems_debugger_verbose()) |
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300 | rtems_debugger_printf("rtems-db: sys: : suspending\n"); |
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301 | r = rtems_debugger_target_swbreak_remove(); |
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302 | if (r == 0) |
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303 | r = rtems_debugger_target_hwbreak_remove(); |
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304 | if (r == 0) { |
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305 | rtems_debugger_thread* current; |
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306 | threads->current.level = 0; |
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307 | threads->registers.level = 0; |
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308 | threads->stopped.level = 0; |
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309 | threads->excludes.level = 0; |
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310 | threads->steppers.level = 0; |
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311 | rtems_task_iterate(snapshot_thread, NULL); |
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312 | current = rtems_debugger_thread_current(threads); |
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313 | if (current == NULL) { |
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314 | rtems_debugger_printf("error: rtems-db: thread: snapshot: (%d) %s\n", |
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315 | errno, strerror(errno)); |
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316 | r = -1; |
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317 | } |
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318 | else { |
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319 | rtems_id* stopped; |
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320 | /* |
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321 | * If there are no stopped threads pick the first one in the current |
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322 | * table and return that. |
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323 | */ |
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324 | threads->selector_gen = 0; |
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325 | threads->selector_cont = 0; |
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326 | stopped = rtems_debugger_thread_stopped(threads); |
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327 | if (threads->stopped.level == 0 && threads->current.level > 0) { |
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328 | stopped[threads->stopped.level++] = current[0].id; |
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329 | } |
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330 | if (threads->stopped.level > 0) { |
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331 | threads->selector_gen = |
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332 | rtems_debugger_thread_find_index(stopped[0]); |
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333 | if (threads->selector_gen < 0) |
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334 | threads->selector_gen = 0; |
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335 | } |
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336 | } |
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337 | } |
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338 | else { |
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339 | errno = EIO; |
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340 | } |
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341 | } |
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342 | return r; |
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343 | } |
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344 | |
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345 | int |
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346 | rtems_debugger_thread_system_resume(bool detaching) |
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347 | { |
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348 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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349 | rtems_debugger_thread* current; |
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350 | int r = 0; |
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351 | current = rtems_debugger_thread_current(threads); |
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352 | if (threads != NULL && current != NULL) { |
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353 | size_t i; |
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354 | if (rtems_debugger_verbose()) |
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355 | rtems_debugger_printf("rtems-db: sys: : resuming\n"); |
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356 | if (!detaching) { |
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357 | r = rtems_debugger_target_swbreak_insert(); |
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358 | if (r == 0) |
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359 | r = rtems_debugger_target_hwbreak_insert(); |
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360 | } |
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361 | if (r == 0) { |
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362 | for (i = 0; i < threads->current.level; ++i) { |
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363 | rtems_debugger_thread* thread = ¤t[i]; |
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364 | rtems_status_code sc; |
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365 | int rr; |
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366 | /* |
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367 | * Check if resuming, which can be continuing, a step, or stepping a |
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368 | * range. |
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369 | */ |
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370 | if (detaching || |
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371 | rtems_debugger_thread_flag(thread, |
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372 | RTEMS_DEBUGGER_THREAD_FLAG_RESUME)) { |
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373 | if (!detaching) { |
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374 | rr = rtems_debugger_target_write_regs(thread); |
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375 | if (rr < 0 && r == 0) |
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376 | r = rr; |
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377 | if (rtems_debugger_thread_flag(thread, |
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378 | RTEMS_DEBUGGER_THREAD_FLAG_STEP_INSTR)) { |
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379 | rr = rtems_debugger_target_thread_stepping(thread); |
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380 | if (rr < 0 && r == 0) |
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381 | r = rr; |
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382 | } |
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383 | } |
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384 | if (rtems_debugger_verbose()) |
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385 | rtems_debugger_printf("rtems-db: sys: : resume: 0x%08" PRIx32 "\n", |
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386 | thread->id); |
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387 | if (rtems_debugger_thread_flag(thread, |
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388 | RTEMS_DEBUGGER_THREAD_FLAG_EXCEPTION)) { |
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389 | rtems_debugger_target_exception_thread_resume(thread); |
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390 | } else { |
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391 | sc = rtems_task_resume(thread->id); |
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392 | if (sc != RTEMS_SUCCESSFUL) { |
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393 | rtems_debugger_printf("error: rtems-db: thread: resume: %08" PRIx32 ": %s\n", |
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394 | thread->id, rtems_status_text(sc)); |
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395 | } |
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396 | } |
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397 | thread->flags &= ~(RTEMS_DEBUGGER_THREAD_FLAG_CONTINUE | |
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398 | RTEMS_DEBUGGER_THREAD_FLAG_STEP); |
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399 | thread->signal = 0; |
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400 | } |
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401 | } |
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402 | /* |
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403 | * Excludes are not cleared so the exception handler can find the |
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404 | * excluded thread. |
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405 | */ |
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406 | threads->current.level = 0; |
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407 | threads->registers.level = 0; |
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408 | threads->stopped.level = 0; |
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409 | } |
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410 | else { |
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411 | r = -1; |
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412 | errno = EIO; |
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413 | } |
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414 | } |
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415 | return r; |
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416 | } |
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417 | |
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418 | int |
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419 | rtems_debugger_thread_continue(rtems_debugger_thread* thread) |
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420 | { |
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421 | thread->flags |= RTEMS_DEBUGGER_THREAD_FLAG_CONTINUE; |
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422 | return 0; |
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423 | } |
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424 | |
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425 | int |
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426 | rtems_debugger_thread_continue_all(void) |
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427 | { |
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428 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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429 | rtems_debugger_thread* current; |
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430 | int r = 0; |
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431 | current = rtems_debugger_thread_current(threads); |
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432 | if (threads != NULL && current != NULL) { |
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433 | size_t i; |
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434 | for (i = 0; i < threads->current.level; ++i) { |
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435 | rtems_debugger_thread* thread = ¤t[i]; |
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436 | if (!rtems_debugger_thread_flag(thread, |
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437 | RTEMS_DEBUGGER_THREAD_FLAG_STEP_INSTR)) { |
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438 | r = rtems_debugger_thread_continue(thread); |
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439 | if (r < 0) |
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440 | break; |
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441 | } |
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442 | } |
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443 | } |
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444 | else { |
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445 | r = -1; |
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446 | errno = EIO; |
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447 | } |
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448 | return r; |
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449 | } |
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450 | |
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451 | int |
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452 | rtems_debugger_thread_step(rtems_debugger_thread* thread) |
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453 | { |
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454 | thread->flags |= RTEMS_DEBUGGER_THREAD_FLAG_STEP; |
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455 | return 0; |
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456 | } |
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457 | |
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458 | int |
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459 | rtems_debugger_thread_stepping(rtems_debugger_thread* thread, |
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460 | DB_UINT start, |
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461 | DB_UINT end) |
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462 | { |
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463 | /* add lock */ |
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464 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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465 | rtems_debugger_thread_stepper* stepper; |
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466 | int r; |
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467 | /* |
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468 | * The resize will automatically extend the block when we are full. The |
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469 | * steppers are cleared in suspend by setting the level to 0. |
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470 | */ |
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471 | r = rtems_debugger_block_resize(&threads->steppers); |
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472 | if (r < 0) { |
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473 | rtems_debugger_thread_free(threads); |
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474 | return -1; |
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475 | } |
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476 | stepper = rtems_debugger_thread_steppers(threads); |
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477 | stepper = &stepper[threads->steppers.level]; |
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478 | stepper->thread = thread; |
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479 | stepper->start = start; |
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480 | stepper->end = end; |
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481 | threads->steppers.level++; |
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482 | thread->flags |= RTEMS_DEBUGGER_THREAD_FLAG_STEPPING; |
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483 | return 0; |
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484 | } |
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485 | |
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486 | const rtems_debugger_thread_stepper* |
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487 | rtems_debugger_thread_is_stepping(rtems_id id, DB_UINT pc) |
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488 | { |
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489 | /* add lock */ |
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490 | rtems_debugger_threads* threads = rtems_debugger->threads; |
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491 | rtems_debugger_thread_stepper* stepper; |
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492 | size_t i; |
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493 | stepper = rtems_debugger_thread_steppers(threads); |
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494 | for (i = 0; i < threads->steppers.level; ++i, ++stepper) { |
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495 | if (stepper->thread->id == id) { |
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496 | if (pc == stepper->start || (pc > stepper->start && pc < stepper->end)) |
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497 | return stepper; |
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498 | break; |
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499 | } |
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500 | } |
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501 | return NULL; |
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502 | } |
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503 | |
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504 | int |
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505 | rtems_debugger_thread_current_priority(rtems_debugger_thread* thread) |
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506 | { |
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507 | return SCHEDULER_PRIORITY_UNMAP(_Thread_Get_priority(thread->tcb)); |
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508 | } |
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509 | |
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510 | int |
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511 | rtems_debugger_thread_real_priority(rtems_debugger_thread* thread) |
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512 | { |
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513 | return SCHEDULER_PRIORITY_UNMAP(thread->tcb->Real_priority.priority); |
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514 | } |
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515 | |
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516 | int |
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517 | rtems_debugger_thread_state(rtems_debugger_thread* thread) |
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518 | { |
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519 | return thread->tcb->current_state; |
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520 | } |
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521 | |
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522 | int |
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523 | rtems_debugger_thread_state_str(rtems_debugger_thread* thread, |
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524 | char* buf, |
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525 | size_t size) |
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526 | { |
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527 | rtems_assoc_thread_states_to_string(thread->tcb->current_state, buf, size); |
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528 | return 0; |
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529 | } |
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530 | |
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531 | unsigned long |
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532 | rtems_debugger_thread_stack_size(rtems_debugger_thread* thread) |
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533 | { |
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534 | return thread->tcb->Start.Initial_stack.size; |
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535 | } |
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536 | |
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537 | void* |
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538 | rtems_debugger_thread_stack_area(rtems_debugger_thread* thread) |
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539 | { |
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540 | return thread->tcb->Start.Initial_stack.area; |
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541 | } |
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