src/server/util/system.c

Sun, 11 Aug 2024 10:09:20 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 11 Aug 2024 10:09:20 +0200
changeset 540
d9c3c23c635b
parent 450
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permissions
-rw-r--r--

fix netbuf_getbytes prematurely returns NETBUF_EOF

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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5 *
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6 * THE BSD LICENSE
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are met:
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10 *
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11 * Redistributions of source code must retain the above copyright notice, this
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12 * list of conditions and the following disclaimer.
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13 * Redistributions in binary form must reproduce the above copyright notice,
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14 * this list of conditions and the following disclaimer in the documentation
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15 * and/or other materials provided with the distribution.
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16 *
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17 * Neither the name of the nor the names of its contributors may be
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18 * used to endorse or promote products derived from this software without
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19 * specific prior written permission.
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20 *
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21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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25 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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32 */
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33
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34 /*
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35 * system.c: A grab bag of system-level abstractions
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36 *
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37 * Many authors
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38 */
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39
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40 #if (defined(__GNUC__) && (__GNUC__ > 2))
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41 //include <new>
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42 //using namespace std;
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43 #else
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44 //include <new.h>
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45 #endif
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46 #include "../daemon/netsite.h"
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47 //include "ereport.h"
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48
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49 #ifdef XP_WIN32
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50 #include <windows.h>
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51 #include <process.h>
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52 #endif
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53
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54 static int thread_malloc_key = -1;
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55
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56 static char* temp_dir = NULL;
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57
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58 #ifdef XP_WIN32
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59 // TODO:
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60 //_PNH original_newhandler = 0;
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61 #else
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62 typedef void (newhandler)(void);
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63 static newhandler *original_newhandler = 0;
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64 #endif
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65
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66 #include "pool.h"
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67 #include "systhr.h"
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68
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69 #define MALLOC_KEY \
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70 ((pool_handle_t *)(thread_malloc_key != -1 ? systhread_getdata(thread_malloc_key) : NULL))
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71
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72
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73 #ifdef MCC_DEBUG
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74 #define DEBUG_MALLOC
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75 #endif
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76
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77 #ifdef DEBUG_MALLOC
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78
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79 /* The debug malloc routines provide several functions:
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80 *
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81 * - detect allocated memory overflow/underflow
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82 * - detect multiple frees
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83 * - intentionally clobbers malloc'd buffers
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84 * - intentionally clobbers freed buffers
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85 */
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86 #define DEBUG_MAGIC 0x12345678
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87 #define DEBUG_MARGIN 32
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88 #define DEBUG_MARGIN_CHAR '*'
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89 #define DEBUG_MALLOC_CHAR '.'
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90 #define DEBUG_FREE_CHAR 'X'
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91 #endif /* DEBUG_MALLOC */
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92
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93 NSAPI_PUBLIC char *system_version()
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94 {
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95 //return PRODUCT_ID"/"PRODUCT_VERSION_ID;
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96 return "webserver/alpha";
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97 }
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98
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99 NSAPI_PUBLIC pool_handle_t *system_pool(void)
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100 {
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101 return MALLOC_KEY;
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102 }
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103
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104 NSAPI_PUBLIC void *system_malloc(int size)
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105 {
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106 void *ret;
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107 ret = pool_malloc(MALLOC_KEY, size);
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108 if (!ret) {
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109 //ereport_outofmemory();
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110 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); // TODO
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111 }
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112 return ret;
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113 }
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114
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115
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116 NSAPI_PUBLIC void *system_calloc(int size)
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117 {
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118 void *ret;
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119 ret = pool_malloc(MALLOC_KEY, size);
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120 if(ret) {
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121 ZERO(ret, size);
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122 } else {
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123 //ereport_outofmemory();
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124 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); // TODO
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125 }
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126 return ret;
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127 }
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128
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129
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130 NSAPI_PUBLIC void *system_realloc(void *ptr, int size)
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131 {
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132 void *ret;
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133 ret = pool_realloc(MALLOC_KEY, ptr, size);
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134 if (!ret) {
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135 //ereport_outofmemory();
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136 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
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137 }
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138 return ret;
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139 }
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141
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142 NSAPI_PUBLIC void system_free(void *ptr)
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143 {
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144 pool_free(MALLOC_KEY, ptr);
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145 }
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146
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147 NSAPI_PUBLIC char *system_strdup(const char *ptr)
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148 {
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149 //NS_ASSERT(ptr);
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150 char *ret;
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151 ret = pool_strdup(MALLOC_KEY, ptr);
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152 if (!ret) {
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153 //ereport_outofmemory();
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154 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
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155 }
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156 return ret;
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157 }
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158
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159
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160 NSAPI_PUBLIC void *system_malloc_perm(int size)
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161 {
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162 void *ret;
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163 #ifndef DEBUG_MALLOC
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164 ret = malloc(size);
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165 #else
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166 char *ptr = (char *)malloc(size + 2*DEBUG_MARGIN+2*sizeof(int));
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167 char *real_ptr;
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168 int *magic;
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169 int *length;
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170
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171 magic = (int *)ptr;
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172 *magic = DEBUG_MAGIC;
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173 ptr += sizeof(int);
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174 length = (int *)ptr;
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175 *length = size;
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176 ptr += sizeof(int);
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177 memset(ptr, DEBUG_MARGIN_CHAR, DEBUG_MARGIN);
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178 ptr += DEBUG_MARGIN;
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179 memset(ptr, DEBUG_MALLOC_CHAR, size);
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180 real_ptr = ptr;
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181 ptr += size;
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182 memset(ptr, DEBUG_MARGIN_CHAR, DEBUG_MARGIN);
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183
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184 ret = real_ptr;
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185 #endif
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186 if (!ret) {
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187 //ereport_outofmemory();
24
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188 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1
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189 }
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190 return ret;
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191 }
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192
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193 NSAPI_PUBLIC void *system_calloc_perm(int size)
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194 {
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195 void *ret = system_malloc_perm(size);
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196 if(ret)
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197 ZERO(ret, size);
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198 return ret;
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199 }
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200
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201 NSAPI_PUBLIC void *system_realloc_perm(void *ptr, int size)
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202 {
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203 void *ret;
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204
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205 #ifndef DEBUG_MALLOC
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206 ret = realloc(ptr, size);
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207 #else
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208 int *magic, *length;
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209 char *baseptr;
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210 char *cptr;
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211
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212 /* realloc semantics allow realloc(NULL, size) */
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213 if (ptr == NULL)
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214 return system_malloc_perm(size);
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215
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216 cptr = (char *)ptr - DEBUG_MARGIN - 2 * sizeof(int);
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217 magic = (int *)cptr;
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218 if (*magic == DEBUG_MAGIC) {
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219 cptr += sizeof(int);
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220 length = (int *)cptr;
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diff changeset
221 if (*length < size) {
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222 char *newptr = (char *)system_malloc_perm(size);
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223 memcpy(newptr, ptr, *length);
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224 system_free_perm(ptr);
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225
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226 ret = newptr;
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227 }else {
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228 ret = ptr;
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229 }
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230 } else {
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231 ereport(LOG_WARN, XP_GetAdminString(DBT_systemReallocSmallerSize));
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232 ret = realloc(ptr, size);
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233 }
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234 #endif
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235
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236 if (!ret) {
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237 //ereport_outofmemory();
24
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238 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1
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239 }
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240
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241 return ret;
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242 }
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243
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244 NSAPI_PUBLIC void system_free_perm(void *ptr)
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245 {
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246 #ifdef DEBUG_MALLOC
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247 int *length, *magic;
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248 char *baseptr, *cptr;
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249 int index;
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250
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251 NS_ASSERT(ptr);
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252
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253 cptr = baseptr = ((char *)ptr) - DEBUG_MARGIN - 2*sizeof(int);
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254
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255 magic = (int *)cptr;
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diff changeset
256 if (*magic == DEBUG_MAGIC) {
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257 cptr += sizeof(int);
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258
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259 length = (int *)cptr;
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260
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261 cptr += sizeof(int);
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diff changeset
262 for (index=0; index<DEBUG_MARGIN; index++)
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263 if (cptr[index] != DEBUG_MARGIN_CHAR) {
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diff changeset
264 ereport(LOG_CATASTROPHE, XP_GetAdminString(DBT_systemRFreeCorruptMemoryPre));
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diff changeset
265 break;
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266 }
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267
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268 cptr += DEBUG_MARGIN + *length;
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diff changeset
269 for (index=0; index<DEBUG_MARGIN; index++)
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diff changeset
270 if (cptr[index] != DEBUG_MARGIN_CHAR) {
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diff changeset
271 ereport(LOG_CATASTROPHE, XP_GetAdminString(DBT_systemRFreeCorruptMemoryPost));
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diff changeset
272 break;
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diff changeset
273 }
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diff changeset
274
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diff changeset
275 memset(baseptr, DEBUG_FREE_CHAR, *length + 2*DEBUG_MARGIN+sizeof(int));
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diff changeset
276 } else {
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diff changeset
277 ereport(LOG_CATASTROPHE, XP_GetAdminString(DBT_systemRFreeUnallocatedMem));
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parents:
diff changeset
278 }
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diff changeset
279 free(baseptr);
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diff changeset
280 #else
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diff changeset
281 free(ptr);
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diff changeset
282 #endif
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diff changeset
283 }
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diff changeset
284
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285 NSAPI_PUBLIC char *system_strdup_perm(const char *ptr)
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parents:
diff changeset
286 {
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diff changeset
287 char *ret;
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diff changeset
288
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diff changeset
289 #ifndef DEBUG_MALLOC
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diff changeset
290 //NS_ASSERT(ptr);
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diff changeset
291 ret = strdup(ptr);
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diff changeset
292 #else
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diff changeset
293 int len = strlen(ptr);
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diff changeset
294 char *nptr = (char *)system_malloc_perm(len+1);
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diff changeset
295 memcpy(nptr, ptr, len);
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diff changeset
296 nptr[len] = '\0';
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diff changeset
297 ret = nptr;
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parents:
diff changeset
298 #endif
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diff changeset
299
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parents:
diff changeset
300 if (!ret) {
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parents:
diff changeset
301 //ereport_outofmemory();
24
1a7853a4257e removed some NSPR dependencies
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parents: 14
diff changeset
302 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1
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parents:
diff changeset
303 }
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parents:
diff changeset
304
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parents:
diff changeset
305 return ret;
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parents:
diff changeset
306 }
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parents:
diff changeset
307
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diff changeset
308 NSAPI_PUBLIC void system_set_temp_dir(const char *dir)
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parents:
diff changeset
309 {
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310 // Leak any previously-allocated dir in case someone still has a reference
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311 temp_dir = STRDUP(dir);
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parents:
diff changeset
312 }
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diff changeset
313
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parents:
diff changeset
314 NSAPI_PUBLIC const char *system_get_temp_dir(void)
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parents:
diff changeset
315 {
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diff changeset
316 char* dir = temp_dir;
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parents:
diff changeset
317
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parents:
diff changeset
318 if (!dir) {
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parents:
diff changeset
319 #ifdef XP_WIN32
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diff changeset
320 dir = getenv("TEMP");
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parents:
diff changeset
321 if (!dir) dir = getenv("TMP");
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parents:
diff changeset
322 if (!dir) dir = "C:\\TEMP";
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parents:
diff changeset
323 #else
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diff changeset
324 dir = "/tmp";
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parents:
diff changeset
325 #endif
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parents:
diff changeset
326 }
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parents:
diff changeset
327
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parents:
diff changeset
328 return dir;
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parents:
diff changeset
329 }
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parents:
diff changeset
330
171
af7e2d80dee6 adds wrapper for close syscall with error handling
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parents: 148
diff changeset
331 int system_close(int fd) {
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parents: 148
diff changeset
332 while(close(fd)) {
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parents: 148
diff changeset
333 if(errno != EINTR) {
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parents: 148
diff changeset
334 return -1;
af7e2d80dee6 adds wrapper for close syscall with error handling
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parents: 148
diff changeset
335 } else {
450
d7b276de183b fix cgi pipes not closed in some error case + minor improvements
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parents: 179
diff changeset
336 log_ereport(LOG_DEBUG, "close interrupted by signal");
171
af7e2d80dee6 adds wrapper for close syscall with error handling
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parents: 148
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337 }
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338 }
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339 return 0;
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340 }
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341
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342 NSAPI_PUBLIC int
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343 getThreadMallocKey(void)
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344 {
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345 return thread_malloc_key;
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346 }
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347
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348 NSAPI_PUBLIC void
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349 InitThreadMallocKey(void)
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350 {
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351 // TODO
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352 //PR_NewThreadPrivateIndex((unsigned int *)&thread_malloc_key, NULL);
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353 //PR_ASSERT(thread_malloc_key);
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354 }
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355
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356 // TODO: don't know what this is
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357 /*
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358 #ifdef XP_WIN32
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359 static int _cdecl system_newhandler(unsigned int size)
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360 {
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361 //ereport_outofmemory();
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362
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363 if (original_newhandler) {
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364 // Let original handler deal with things
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365 return (*original_newhandler)(size);
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366 }
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367
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368 // Tell new not to retry the allocation
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369 return 0;
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370 }
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371 #else
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372 static void system_newhandler()
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373 {
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374 // We want to preserve the original new semantics, but we don't know what
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375 // those semantics are. Some platforms throw xalloc while others throw
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376 // bad_alloc.
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377
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378 //ereport_outofmemory();
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379
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380 if (original_newhandler) {
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381 // Let original handler deal with things
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382 (*original_newhandler)();
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383 } else {
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384 // No original handler to call; try to remove all handlers
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385 static PRBool flagRemovedHandler = PR_FALSE;
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386 if (flagRemovedHandler) {
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387 abort();
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388 }
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389 //set_new_handler(0); // TODO: set_new_handler
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390 flagRemovedHandler = PR_TRUE;
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391 }
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392 }
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393 #endif
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394
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395 NSAPI_PUBLIC void system_setnewhandler(void)
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396 {
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397 #ifdef XP_WIN32
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398 original_newhandler = _set_new_handler(system_newhandler);
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399 #else
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400 //original_newhandler = set_new_handler(system_newhandler); // TODO: ...
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401 #endif
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402 }
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403
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404 */

mercurial