Mercurial > trustbridge > nss-cmake-static

annotate nspr/pr/src/misc/prthinfo.c @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 #include "prlog.h"
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7 #include "prthread.h"
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8 #include "private/pprthred.h"
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9 #include "primpl.h"
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10
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11 PR_IMPLEMENT(PRWord *)
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12 PR_GetGCRegisters(PRThread *t, int isCurrent, int *np)
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13 {
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14 return _MD_HomeGCRegisters(t, isCurrent, np);
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15 }
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16
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17 PR_IMPLEMENT(PRStatus)
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18 PR_ThreadScanStackPointers(PRThread* t,
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19 PRScanStackFun scanFun, void* scanClosure)
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20 {
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21 PRThread* current = PR_GetCurrentThread();
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22 PRWord *sp, *esp, *p0;
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23 int n;
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24 void **ptd;
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25 PRStatus status;
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26 PRUint32 index;
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27 int stack_end;
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28
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29 /*
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30 ** Store the thread's registers in the thread structure so the GC
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31 ** can scan them. Then scan them.
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32 */
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33 p0 = _MD_HomeGCRegisters(t, t == current, &n);
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34 status = scanFun(t, (void**)p0, n, scanClosure);
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35 if (status != PR_SUCCESS)
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36 return status;
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37
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38 /* Scan the C stack for pointers into the GC heap */
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39 #if defined(XP_PC) && defined(WIN16)
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40 /*
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41 ** Under WIN16, the stack of the current thread is always mapped into
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42 ** the "task stack" (at SS:xxxx). So, if t is the current thread, scan
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43 ** the "task stack". Otherwise, scan the "cached stack" of the inactive
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44 ** thread...
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45 */
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46 if (t == current) {
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47 sp = (PRWord*) &stack_end;
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48 esp = (PRWord*) _pr_top_of_task_stack;
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49
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50 PR_ASSERT(sp <= esp);
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51 } else {
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52 sp = (PRWord*) PR_GetSP(t);
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53 esp = (PRWord*) t->stack->stackTop;
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54
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55 PR_ASSERT((t->stack->stackSize == 0) ||
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56 ((sp > (PRWord*)t->stack->stackBottom) &&
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57 (sp <= (PRWord*)t->stack->stackTop)));
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58 }
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59 #else /* ! WIN16 */
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60 #ifdef HAVE_STACK_GROWING_UP
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61 if (t == current) {
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62 esp = (PRWord*) &stack_end;
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63 } else {
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64 esp = (PRWord*) PR_GetSP(t);
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65 }
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66 sp = (PRWord*) t->stack->stackTop;
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67 if (t->stack->stackSize) {
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68 PR_ASSERT((esp > (PRWord*)t->stack->stackTop) &&
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69 (esp < (PRWord*)t->stack->stackBottom));
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70 }
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71 #else /* ! HAVE_STACK_GROWING_UP */
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72 if (t == current) {
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73 sp = (PRWord*) &stack_end;
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74 } else {
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75 sp = (PRWord*) PR_GetSP(t);
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76 }
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77 esp = (PRWord*) t->stack->stackTop;
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78 if (t->stack->stackSize) {
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79 PR_ASSERT((sp > (PRWord*)t->stack->stackBottom) &&
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80 (sp < (PRWord*)t->stack->stackTop));
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81 }
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82 #endif /* ! HAVE_STACK_GROWING_UP */
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83 #endif /* ! WIN16 */
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84
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85 #if defined(WIN16)
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86 {
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87 prword_t scan;
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88 prword_t limit;
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89
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90 scan = (prword_t) sp;
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91 limit = (prword_t) esp;
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92 while (scan < limit) {
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93 prword_t *test;
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94
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95 test = *((prword_t **)scan);
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96 status = scanFun(t, (void**)&test, 1, scanClosure);
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97 if (status != PR_SUCCESS)
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98 return status;
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99 scan += sizeof(char);
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100 }
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101 }
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102 #else
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103 if (sp < esp) {
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104 status = scanFun(t, (void**)sp, esp - sp, scanClosure);
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105 if (status != PR_SUCCESS)
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106 return status;
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107 }
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108 #endif
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109
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110 /*
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111 ** Mark all of the per-thread-data items attached to this thread
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112 **
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113 ** The execution environment better be accounted for otherwise it
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114 ** will be collected
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115 */
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116 status = scanFun(t, (void**)&t->environment, 1, scanClosure);
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117 if (status != PR_SUCCESS)
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118 return status;
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119
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120 /* if thread is not allocated on stack, this is redundant. */
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121 ptd = t->privateData;
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122 for (index = 0; index < t->tpdLength; index++, ptd++) {
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123 status = scanFun(t, (void**)ptd, 1, scanClosure);
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124 if (status != PR_SUCCESS)
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125 return status;
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126 }
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127
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128 return PR_SUCCESS;
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129 }
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130
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131 /* transducer for PR_EnumerateThreads */
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132 typedef struct PRScanStackData {
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133 PRScanStackFun scanFun;
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134 void* scanClosure;
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135 } PRScanStackData;
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136
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137 static PRStatus PR_CALLBACK
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138 pr_ScanStack(PRThread* t, int i, void* arg)
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139 {
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140 PRScanStackData* data = (PRScanStackData*)arg;
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141 return PR_ThreadScanStackPointers(t, data->scanFun, data->scanClosure);
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142 }
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143
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144 PR_IMPLEMENT(PRStatus)
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145 PR_ScanStackPointers(PRScanStackFun scanFun, void* scanClosure)
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146 {
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147 PRScanStackData data;
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148 data.scanFun = scanFun;
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149 data.scanClosure = scanClosure;
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150 return PR_EnumerateThreads(pr_ScanStack, &data);
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151 }
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152
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153 PR_IMPLEMENT(PRUword)
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154 PR_GetStackSpaceLeft(PRThread* t)
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155 {
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156 PRThread *current = PR_GetCurrentThread();
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157 PRWord *sp, *esp;
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158 int stack_end;
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159
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160 #if defined(WIN16)
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161 /*
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162 ** Under WIN16, the stack of the current thread is always mapped into
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163 ** the "task stack" (at SS:xxxx). So, if t is the current thread, scan
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164 ** the "task stack". Otherwise, scan the "cached stack" of the inactive
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165 ** thread...
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166 */
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167 if (t == current) {
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168 sp = (PRWord*) &stack_end;
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169 esp = (PRWord*) _pr_top_of_task_stack;
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170
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171 PR_ASSERT(sp <= esp);
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172 } else {
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173 sp = (PRWord*) PR_GetSP(t);
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174 esp = (PRWord*) t->stack->stackTop;
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175
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176 PR_ASSERT((t->stack->stackSize == 0) ||
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177 ((sp > (PRWord*)t->stack->stackBottom) &&
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178 (sp <= (PRWord*)t->stack->stackTop)));
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179 }
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180 #else /* ! WIN16 */
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181 #ifdef HAVE_STACK_GROWING_UP
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182 if (t == current) {
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183 esp = (PRWord*) &stack_end;
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184 } else {
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185 esp = (PRWord*) PR_GetSP(t);
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186 }
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187 sp = (PRWord*) t->stack->stackTop;
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188 if (t->stack->stackSize) {
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189 PR_ASSERT((esp > (PRWord*)t->stack->stackTop) &&
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190 (esp < (PRWord*)t->stack->stackBottom));
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191 }
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192 #else /* ! HAVE_STACK_GROWING_UP */
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193 if (t == current) {
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194 sp = (PRWord*) &stack_end;
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195 } else {
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196 sp = (PRWord*) PR_GetSP(t);
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197 }
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198 esp = (PRWord*) t->stack->stackTop;
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199 if (t->stack->stackSize) {
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200 PR_ASSERT((sp > (PRWord*)t->stack->stackBottom) &&
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201 (sp < (PRWord*)t->stack->stackTop));
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202 }
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203 #endif /* ! HAVE_STACK_GROWING_UP */
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204 #endif /* ! WIN16 */
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205 return (PRUword)t->stack->stackSize - ((PRWord)esp - (PRWord)sp);
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206 }
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