[ac7d5ef0] | 1 | /* |
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| 2 | * Stack Overflow Check User Extension Set |
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| 3 | * |
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| 4 | * NOTE: This extension set automatically determines at |
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| 5 | * initialization time whether the stack for this |
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| 6 | * CPU grows up or down and installs the correct |
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| 7 | * extension routines for that direction. |
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| 8 | * |
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[03f2154e] | 9 | * COPYRIGHT (c) 1989-1997. |
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[ac7d5ef0] | 10 | * On-Line Applications Research Corporation (OAR). |
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[03f2154e] | 11 | * Copyright assigned to U.S. Government, 1994. |
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[ac7d5ef0] | 12 | * |
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[98e4ebf5] | 13 | * The license and distribution terms for this file may be |
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| 14 | * found in the file LICENSE in this distribution or at |
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[03f2154e] | 15 | * http://www.OARcorp.com/rtems/license.html. |
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[ac7d5ef0] | 16 | * |
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| 17 | * $Id$ |
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| 18 | * |
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| 19 | */ |
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| 20 | |
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[3a4ae6c] | 21 | #include <rtems.h> |
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| 22 | |
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[8389628] | 23 | /* |
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| 24 | * HACK |
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| 25 | * the stack dump information should be printed by a "fatal" extension. |
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| 26 | * Fatal extensions only get called via rtems_fatal_error_occurred() |
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| 27 | * and not when rtems_shutdown_executive() is called. |
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| 28 | * I hope/think this is changing so that fatal extensions are renamed |
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| 29 | * to "shutdown" extensions. |
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| 30 | * When that happens, this #define should be deleted and all the code |
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| 31 | * it marks. |
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| 32 | */ |
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| 33 | #define DONT_USE_FATAL_EXTENSION |
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| 34 | |
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| 35 | |
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[ac7d5ef0] | 36 | extern rtems_configuration_table BSP_Configuration; |
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| 37 | |
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| 38 | #include <assert.h> |
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| 39 | #include <stdio.h> |
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| 40 | #include <string.h> |
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| 41 | #include <stdlib.h> |
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| 42 | |
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| 43 | #include "stackchk.h" |
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| 44 | #include "internal.h" |
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| 45 | |
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| 46 | /* |
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| 47 | * This variable contains the name of the task which "blew" the stack. |
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| 48 | * It is NULL if the system is all right. |
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| 49 | */ |
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| 50 | |
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| 51 | Thread_Control *Stack_check_Blown_task; |
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| 52 | |
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| 53 | /* |
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| 54 | * The extension table for the stack checker. |
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| 55 | */ |
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| 56 | |
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| 57 | rtems_extensions_table Stack_check_Extension_table = { |
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| 58 | Stack_check_Create_extension, /* rtems_task_create */ |
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| 59 | 0, /* rtems_task_start */ |
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| 60 | 0, /* rtems_task_restart */ |
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| 61 | 0, /* rtems_task_delete */ |
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| 62 | Stack_check_Switch_extension, /* task_switch */ |
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| 63 | Stack_check_Begin_extension, /* task_begin */ |
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| 64 | 0, /* task_exitted */ |
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[8389628] | 65 | #ifdef DONT_USE_FATAL_EXTENSION |
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| 66 | 0, /* fatal */ |
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| 67 | #else |
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[ac7d5ef0] | 68 | Stack_check_Fatal_extension, /* fatal */ |
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[8389628] | 69 | #endif |
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[ac7d5ef0] | 70 | }; |
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| 71 | |
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| 72 | /* |
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| 73 | * The "magic pattern" used to mark the end of the stack. |
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| 74 | */ |
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| 75 | |
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| 76 | Stack_check_Control Stack_check_Pattern; |
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| 77 | |
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| 78 | /* |
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| 79 | * Where the pattern goes in the stack area is dependent upon |
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| 80 | * whether the stack grow to the high or low area of the memory. |
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| 81 | * |
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| 82 | */ |
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| 83 | |
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| 84 | #if ( CPU_STACK_GROWS_UP == TRUE ) |
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| 85 | |
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| 86 | #define Stack_check_Get_pattern_area( _the_stack ) \ |
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[5697c28] | 87 | ((Stack_check_Control *) ((char *)(_the_stack)->area + \ |
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| 88 | (_the_stack)->size - sizeof( Stack_check_Control ) )) |
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[ac7d5ef0] | 89 | |
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| 90 | #define Stack_check_Calculate_used( _low, _size, _high_water ) \ |
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[5697c28] | 91 | ((char *)(_high_water) - (char *)(_low)) |
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[ac7d5ef0] | 92 | |
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| 93 | #define Stack_check_usable_stack_start(_the_stack) \ |
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| 94 | ((_the_stack)->area) |
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| 95 | |
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| 96 | #else |
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| 97 | |
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| 98 | #define Stack_check_Get_pattern_area( _the_stack ) \ |
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[5697c28] | 99 | ((Stack_check_Control *) ((char *)(_the_stack)->area + HEAP_OVERHEAD)) |
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[ac7d5ef0] | 100 | |
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| 101 | #define Stack_check_Calculate_used( _low, _size, _high_water) \ |
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[5697c28] | 102 | ( ((char *)(_low) + (_size)) - (char *)(_high_water) ) |
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[ac7d5ef0] | 103 | |
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| 104 | #define Stack_check_usable_stack_start(_the_stack) \ |
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[5697c28] | 105 | ((char *)(_the_stack)->area + sizeof(Stack_check_Control)) |
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[ac7d5ef0] | 106 | |
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| 107 | #endif |
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| 108 | |
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| 109 | #define Stack_check_usable_stack_size(_the_stack) \ |
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| 110 | ((_the_stack)->size - sizeof(Stack_check_Control)) |
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| 111 | |
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| 112 | |
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| 113 | /* |
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| 114 | * Do we have an interrupt stack? |
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| 115 | * XXX it would sure be nice if the interrupt stack were also |
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| 116 | * stored in a "stack" structure! |
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| 117 | */ |
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| 118 | |
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| 119 | |
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| 120 | Stack_Control stack_check_interrupt_stack; |
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| 121 | |
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[29310016] | 122 | /* |
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| 123 | * Prototypes necessary for forward references |
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| 124 | */ |
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| 125 | |
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| 126 | void Stack_check_Dump_usage( void ); |
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| 127 | |
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[ac7d5ef0] | 128 | /* |
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| 129 | * Fill an entire stack area with BYTE_PATTERN. |
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| 130 | * This will be used by a Fatal extension to check for |
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| 131 | * amount of actual stack used |
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| 132 | */ |
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| 133 | |
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| 134 | void |
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| 135 | stack_check_dope_stack(Stack_Control *stack) |
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| 136 | { |
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| 137 | memset(stack->area, BYTE_PATTERN, stack->size); |
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| 138 | } |
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| 139 | |
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| 140 | |
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| 141 | /*PAGE |
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| 142 | * |
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| 143 | * Stack_check_Initialize |
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| 144 | */ |
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| 145 | |
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| 146 | unsigned32 stack_check_initialized = 0; |
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| 147 | |
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| 148 | void Stack_check_Initialize( void ) |
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| 149 | { |
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[3a4ae6c] | 150 | rtems_status_code status; |
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| 151 | Objects_Id id_ignored; |
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| 152 | unsigned32 *p; |
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[11290355] | 153 | #if 0 |
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[3a4ae6c] | 154 | unsigned32 i; |
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| 155 | unsigned32 class_index; |
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| 156 | Thread_Control *the_thread; |
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| 157 | Objects_Information *information; |
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[11290355] | 158 | #endif |
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[ac7d5ef0] | 159 | |
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| 160 | if (stack_check_initialized) |
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| 161 | return; |
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| 162 | |
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| 163 | /* |
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| 164 | * Dope the pattern and fill areas |
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| 165 | */ |
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| 166 | |
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| 167 | for ( p = Stack_check_Pattern.pattern; |
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| 168 | p < &Stack_check_Pattern.pattern[PATTERN_SIZE_WORDS]; |
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| 169 | p += 4 |
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| 170 | ) |
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| 171 | { |
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| 172 | p[0] = 0xFEEDF00D; /* FEED FOOD to BAD DOG */ |
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| 173 | p[1] = 0x0BAD0D06; |
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| 174 | p[2] = 0xDEADF00D; /* DEAD FOOD GOOD DOG */ |
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| 175 | p[3] = 0x600D0D06; |
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| 176 | }; |
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| 177 | |
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| 178 | status = rtems_extension_create( |
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| 179 | rtems_build_name( 'S', 'T', 'C', 'K' ), |
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| 180 | &Stack_check_Extension_table, |
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| 181 | &id_ignored |
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| 182 | ); |
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| 183 | assert ( status == RTEMS_SUCCESSFUL ); |
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| 184 | |
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| 185 | Stack_check_Blown_task = 0; |
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| 186 | |
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| 187 | /* |
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| 188 | * If installed by a task, that task will not get setup properly |
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| 189 | * since it missed out on the create hook. This will cause a |
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| 190 | * failure on first switch out of that task. |
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| 191 | * So pretend here that we actually ran create and begin extensions. |
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| 192 | */ |
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| 193 | |
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[3a4ae6c] | 194 | /* XXX |
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| 195 | * |
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| 196 | * Technically this has not been done for any task created before this |
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| 197 | * happened. So just run through them and fix the situation. |
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| 198 | */ |
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| 199 | #if 0 |
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[ac7d5ef0] | 200 | if (_Thread_Executing) |
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| 201 | { |
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| 202 | Stack_check_Create_extension(_Thread_Executing, _Thread_Executing); |
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| 203 | } |
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[3a4ae6c] | 204 | #endif |
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| 205 | |
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| 206 | #if 0 |
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| 207 | for ( class_index = OBJECTS_CLASSES_FIRST ; |
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| 208 | class_index <= OBJECTS_CLASSES_LAST ; |
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| 209 | class_index++ ) { |
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| 210 | information = _Objects_Information_table[ class_index ]; |
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| 211 | if ( information && information->is_thread ) { |
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| 212 | for ( i=1 ; i <= information->maximum ; i++ ) { |
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| 213 | the_thread = (Thread_Control *)information->local_table[ i ]; |
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| 214 | Stack_check_Create_extension( the_thread, the_thread ); |
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| 215 | } |
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| 216 | } |
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| 217 | } |
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| 218 | #endif |
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[ac7d5ef0] | 219 | |
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| 220 | /* |
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| 221 | * If appropriate, setup the interrupt stack for high water testing |
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| 222 | * also. |
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| 223 | */ |
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| 224 | if (_CPU_Interrupt_stack_low && _CPU_Interrupt_stack_high) |
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| 225 | { |
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| 226 | stack_check_interrupt_stack.area = _CPU_Interrupt_stack_low; |
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[5697c28] | 227 | stack_check_interrupt_stack.size = (char *) _CPU_Interrupt_stack_high - |
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| 228 | (char *) _CPU_Interrupt_stack_low; |
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[ac7d5ef0] | 229 | |
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| 230 | stack_check_dope_stack(&stack_check_interrupt_stack); |
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| 231 | } |
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| 232 | |
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[8389628] | 233 | #ifdef DONT_USE_FATAL_EXTENSION |
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| 234 | #ifdef RTEMS_DEBUG |
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| 235 | /* |
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| 236 | * this would normally be called by a fatal extension |
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| 237 | * handler, but we don't run fatal extensions unless |
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| 238 | * we fatal error. |
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| 239 | */ |
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| 240 | atexit(Stack_check_Dump_usage); |
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| 241 | #endif |
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| 242 | #endif |
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| 243 | |
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[ac7d5ef0] | 244 | stack_check_initialized = 1; |
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| 245 | } |
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| 246 | |
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| 247 | /*PAGE |
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| 248 | * |
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| 249 | * Stack_check_Create_extension |
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| 250 | */ |
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| 251 | |
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[3a4ae6c] | 252 | boolean Stack_check_Create_extension( |
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[ac7d5ef0] | 253 | Thread_Control *running, |
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| 254 | Thread_Control *the_thread |
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| 255 | ) |
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| 256 | { |
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[3a4ae6c] | 257 | if (the_thread /* XXX && (the_thread != _Thread_Executing) */ ) |
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[ac7d5ef0] | 258 | stack_check_dope_stack(&the_thread->Start.Initial_stack); |
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[3a4ae6c] | 259 | |
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| 260 | return TRUE; |
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[ac7d5ef0] | 261 | } |
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| 262 | |
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| 263 | /*PAGE |
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| 264 | * |
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| 265 | * Stack_check_Begin_extension |
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| 266 | */ |
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| 267 | |
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| 268 | void Stack_check_Begin_extension( |
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| 269 | Thread_Control *the_thread |
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| 270 | ) |
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| 271 | { |
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| 272 | Stack_check_Control *the_pattern; |
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| 273 | |
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| 274 | if ( the_thread->Object.id == 0 ) /* skip system tasks */ |
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| 275 | return; |
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| 276 | |
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| 277 | the_pattern = Stack_check_Get_pattern_area(&the_thread->Start.Initial_stack); |
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| 278 | |
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| 279 | *the_pattern = Stack_check_Pattern; |
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| 280 | } |
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| 281 | |
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| 282 | /*PAGE |
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| 283 | * |
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| 284 | * Stack_check_report_blown_task |
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| 285 | * Report a blown stack. Needs to be a separate routine |
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| 286 | * so that interrupt handlers can use this too. |
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| 287 | * |
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| 288 | * Caller must have set the Stack_check_Blown_task. |
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| 289 | * |
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| 290 | * NOTE: The system is in a questionable state... we may not get |
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| 291 | * the following message out. |
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| 292 | */ |
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| 293 | |
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| 294 | void Stack_check_report_blown_task(void) |
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| 295 | { |
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| 296 | Stack_Control *stack; |
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| 297 | Thread_Control *running; |
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| 298 | |
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| 299 | running = Stack_check_Blown_task; |
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| 300 | stack = &running->Start.Initial_stack; |
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| 301 | |
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| 302 | fprintf( |
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| 303 | stderr, |
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| 304 | "BLOWN STACK!!! Offending task(%p): id=0x%08x; name=0x%08x", |
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| 305 | running, |
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| 306 | running->Object.id, |
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[3235ad9] | 307 | *(unsigned32 *)running->Object.name |
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[0f592fba] | 308 | ); |
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[ac7d5ef0] | 309 | fflush(stderr); |
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| 310 | |
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| 311 | if (BSP_Configuration.User_multiprocessing_table) |
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| 312 | fprintf( |
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| 313 | stderr, |
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| 314 | "; node=%d\n", |
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| 315 | BSP_Configuration.User_multiprocessing_table->node |
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| 316 | ); |
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| 317 | else |
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| 318 | fprintf(stderr, "\n"); |
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| 319 | fflush(stderr); |
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| 320 | |
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| 321 | fprintf( |
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| 322 | stderr, |
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| 323 | " stack covers range 0x%08x - 0x%08x (%d bytes)\n", |
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| 324 | (unsigned32) stack->area, |
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| 325 | (unsigned32) stack->area + stack->size - 1, |
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| 326 | (unsigned32) stack->size); |
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| 327 | fflush(stderr); |
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| 328 | |
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| 329 | fprintf( |
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| 330 | stderr, |
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| 331 | " Damaged pattern begins at 0x%08x and is %d bytes long\n", |
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| 332 | (unsigned32) Stack_check_Get_pattern_area(stack), PATTERN_SIZE_BYTES); |
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| 333 | fflush(stderr); |
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| 334 | |
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| 335 | rtems_fatal_error_occurred( (unsigned32) "STACK BLOWN" ); |
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| 336 | } |
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| 337 | |
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| 338 | /*PAGE |
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| 339 | * |
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| 340 | * Stack_check_Switch_extension |
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| 341 | */ |
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| 342 | |
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| 343 | void Stack_check_Switch_extension( |
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| 344 | Thread_Control *running, |
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| 345 | Thread_Control *heir |
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| 346 | ) |
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| 347 | { |
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| 348 | if ( running->Object.id == 0 ) /* skip system tasks */ |
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| 349 | return; |
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| 350 | |
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| 351 | if (0 != memcmp( (void *) Stack_check_Get_pattern_area( &running->Start.Initial_stack)->pattern, |
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| 352 | (void *) Stack_check_Pattern.pattern, |
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| 353 | PATTERN_SIZE_BYTES)) |
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| 354 | { |
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| 355 | Stack_check_Blown_task = running; |
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| 356 | Stack_check_report_blown_task(); |
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| 357 | } |
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| 358 | } |
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| 359 | |
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| 360 | void *Stack_check_find_high_water_mark( |
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| 361 | const void *s, |
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| 362 | size_t n |
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| 363 | ) |
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| 364 | { |
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| 365 | const unsigned32 *base, *ebase; |
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| 366 | unsigned32 length; |
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| 367 | |
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| 368 | base = s; |
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| 369 | length = n/4; |
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| 370 | |
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| 371 | #if ( CPU_STACK_GROWS_UP == TRUE ) |
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| 372 | /* |
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| 373 | * start at higher memory and find first word that does not |
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| 374 | * match pattern |
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| 375 | */ |
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| 376 | |
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| 377 | base += length - 1; |
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| 378 | for (ebase = s; base > ebase; base--) |
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| 379 | if (*base != U32_PATTERN) |
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| 380 | return (void *) base; |
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| 381 | #else |
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| 382 | /* |
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| 383 | * start at lower memory and find first word that does not |
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| 384 | * match pattern |
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| 385 | */ |
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| 386 | |
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[9e86dd7d] | 387 | base += PATTERN_SIZE_WORDS; |
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[ac7d5ef0] | 388 | for (ebase = base + length; base < ebase; base++) |
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| 389 | if (*base != U32_PATTERN) |
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| 390 | return (void *) base; |
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| 391 | #endif |
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| 392 | |
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| 393 | return (void *)0; |
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| 394 | } |
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| 395 | |
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| 396 | /*PAGE |
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| 397 | * |
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| 398 | * Stack_check_Dump_threads_usage |
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| 399 | * Try to print out how much stack was actually used by the task. |
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| 400 | * |
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| 401 | */ |
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| 402 | |
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| 403 | void Stack_check_Dump_threads_usage( |
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| 404 | Thread_Control *the_thread |
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| 405 | ) |
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| 406 | { |
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| 407 | unsigned32 size, used; |
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| 408 | void *low; |
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| 409 | void *high_water_mark; |
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| 410 | Stack_Control *stack; |
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[c46ce854] | 411 | unsigned32 u32_name; |
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| 412 | char name[5]; |
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| 413 | |
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[ac7d5ef0] | 414 | |
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| 415 | if ( !the_thread ) |
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| 416 | return; |
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| 417 | |
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| 418 | /* |
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| 419 | * XXX HACK to get to interrupt stack |
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| 420 | */ |
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| 421 | |
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| 422 | if (the_thread == (Thread_Control *) -1) |
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| 423 | { |
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| 424 | if (stack_check_interrupt_stack.area) |
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| 425 | { |
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| 426 | stack = &stack_check_interrupt_stack; |
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| 427 | the_thread = 0; |
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| 428 | } |
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| 429 | else |
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| 430 | return; |
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| 431 | } |
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| 432 | else |
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| 433 | stack = &the_thread->Start.Initial_stack; |
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| 434 | |
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| 435 | low = Stack_check_usable_stack_start(stack); |
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| 436 | size = Stack_check_usable_stack_size(stack); |
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| 437 | |
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| 438 | high_water_mark = Stack_check_find_high_water_mark(low, size); |
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| 439 | |
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| 440 | if ( high_water_mark ) |
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| 441 | used = Stack_check_Calculate_used( low, size, high_water_mark ); |
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| 442 | else |
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| 443 | used = 0; |
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| 444 | |
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[c46ce854] | 445 | if ( the_thread ) |
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| 446 | u32_name = *(unsigned32 *)the_thread->Object.name; |
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| 447 | else |
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| 448 | u32_name = rtems_build_name('I', 'N', 'T', 'R'); |
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| 449 | |
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| 450 | name[ 0 ] = (u32_name >> 24) & 0xff; |
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| 451 | name[ 1 ] = (u32_name >> 16) & 0xff; |
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| 452 | name[ 2 ] = (u32_name >> 8) & 0xff; |
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| 453 | name[ 3 ] = (u32_name >> 0) & 0xff; |
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| 454 | name[ 4 ] = '\0'; |
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| 455 | |
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| 456 | printf( "0x%08x %4s 0x%08x 0x%08x %8d %8d\n", |
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[ac7d5ef0] | 457 | the_thread ? the_thread->Object.id : ~0, |
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[c46ce854] | 458 | name, |
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[ac7d5ef0] | 459 | (unsigned32) stack->area, |
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| 460 | (unsigned32) stack->area + (unsigned32) stack->size - 1, |
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| 461 | size, |
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| 462 | used |
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| 463 | ); |
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| 464 | } |
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| 465 | |
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| 466 | /*PAGE |
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| 467 | * |
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| 468 | * Stack_check_Fatal_extension |
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| 469 | */ |
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| 470 | |
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[8389628] | 471 | void Stack_check_Fatal_extension( |
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[11290355] | 472 | Internal_errors_Source source, |
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| 473 | boolean is_internal, |
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| 474 | unsigned32 status |
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| 475 | ) |
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[ac7d5ef0] | 476 | { |
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[8389628] | 477 | #ifndef DONT_USE_FATAL_EXTENSION |
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[ac7d5ef0] | 478 | if (status == 0) |
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| 479 | Stack_check_Dump_usage(); |
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[8389628] | 480 | #endif |
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[ac7d5ef0] | 481 | } |
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| 482 | |
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| 483 | |
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| 484 | /*PAGE |
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| 485 | * |
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| 486 | * Stack_check_Dump_usage |
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| 487 | */ |
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| 488 | |
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| 489 | void Stack_check_Dump_usage( void ) |
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| 490 | { |
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[5250ff39] | 491 | unsigned32 i; |
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| 492 | unsigned32 class_index; |
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| 493 | Thread_Control *the_thread; |
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| 494 | unsigned32 hit_running = 0; |
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| 495 | Objects_Information *information; |
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[ac7d5ef0] | 496 | |
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| 497 | if (stack_check_initialized == 0) |
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| 498 | return; |
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| 499 | |
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[11290355] | 500 | printf("Stack usage by thread\n"); |
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[ac7d5ef0] | 501 | printf( |
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| 502 | " ID NAME LOW HIGH AVAILABLE USED\n" |
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| 503 | ); |
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[5250ff39] | 504 | |
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| 505 | for ( class_index = OBJECTS_CLASSES_FIRST ; |
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| 506 | class_index <= OBJECTS_CLASSES_LAST ; |
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| 507 | class_index++ ) { |
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| 508 | information = _Objects_Information_table[ class_index ]; |
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| 509 | if ( information && information->is_thread ) { |
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[7f6a24ab] | 510 | for ( i=1 ; i <= information->maximum ; i++ ) { |
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[5250ff39] | 511 | the_thread = (Thread_Control *)information->local_table[ i ]; |
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| 512 | Stack_check_Dump_threads_usage( the_thread ); |
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| 513 | if ( the_thread == _Thread_Executing ) |
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| 514 | hit_running = 1; |
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| 515 | } |
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| 516 | } |
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[ac7d5ef0] | 517 | } |
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| 518 | |
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| 519 | if ( !hit_running ) |
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| 520 | Stack_check_Dump_threads_usage( _Thread_Executing ); |
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| 521 | |
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| 522 | /* dump interrupt stack info if any */ |
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| 523 | Stack_check_Dump_threads_usage((Thread_Control *) -1); |
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| 524 | } |
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| 525 | |
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