Mercurial > cpython-lru_cache-weakref

annotate Python/dynload_next.c @ 17104:a488a63cb867 legacy-trunk

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Fix PyFrame_FastToLocals() and counterpart to deal with cells and frees. Note there doesn't seem to be any way to test LocalsToFast(), because the instructions that trigger it are illegal in nested scopes with free variables. Fix allocation strategy for cells that are also formal parameters. Instead of emitting LOAD_FAST / STORE_DEREF pairs for each parameter, have the argument handling code in eval_code2() do the right thing. A side-effect of this change is that cell variables that are also arguments are listed at the front of co_cellvars in the order they appear in the argument list.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Wed, 21 Mar 2001 16:43:47 +0000
parents 6f6f965c5e2d
children ca12e1e333ea
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1
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2 /* Support for dynamic loading of extension modules */
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3
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4 #include "Python.h"
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5 #include "importdl.h"
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6
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7
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8 #ifdef WITH_DYLD
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9
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10 #define USE_DYLD
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11
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12 #include <mach-o/dyld.h>
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13
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14 #else /* WITH_DYLD */
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15
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16 #define USE_RLD
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17 /* Define this to 1 if you want be able to load ObjC modules as well:
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18 it switches between two different way of loading modules on the NeXT,
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19 one that directly interfaces with the dynamic loader (rld_load(), which
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20 does not correctly load ObjC object files), and another that uses the
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21 ObjC runtime (objc_loadModules()) to do the job.
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22 You'll have to add ``-ObjC'' to the compiler flags if you set this to 1.
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23 */
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24 #define HANDLE_OBJC_MODULES 1
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25 #if HANDLE_OBJC_MODULES
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26 #include <objc/Object.h>
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27 #include <objc/objc-load.h>
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28 #endif
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29
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30 #include <mach-o/rld.h>
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31
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32 #endif /* WITH_DYLD */
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33
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34
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35 const struct filedescr _PyImport_DynLoadFiletab[] = {
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36 {".so", "rb", C_EXTENSION},
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37 {"module.so", "rb", C_EXTENSION},
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38 {0, 0}
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39 };
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40
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41 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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42 const char *pathname, FILE *fp)
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43 {
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44 dl_funcptr p = NULL;
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45 char funcname[258];
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46
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47 sprintf(funcname, "_init%.200s", shortname);
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49 #ifdef USE_RLD
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50 {
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51 NXStream *errorStream;
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52 struct mach_header *new_header;
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53 const char *filenames[2];
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54 long ret;
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55 unsigned long ptr;
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56
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57 errorStream = NXOpenMemory(NULL, 0, NX_WRITEONLY);
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58 filenames[0] = pathname;
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59 filenames[1] = NULL;
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60
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61 #if HANDLE_OBJC_MODULES
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62
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63 /* The following very bogus line of code ensures that
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64 objc_msgSend, etc are linked into the binary. Without
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65 it, dynamic loading of a module that includes objective-c
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66 method calls will fail with "undefined symbol _objc_msgSend()".
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67 This remains true even in the presence of the -ObjC flag
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68 to the compiler
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69 */
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70
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71 [Object name];
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72
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73 /* objc_loadModules() dynamically loads the object files
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74 indicated by the paths in filenames. If there are any
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75 errors generated during loading -- typically due to the
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76 inability to find particular symbols -- an error message
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77 will be written to errorStream.
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78 It returns 0 if the module is successfully loaded, 1
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79 otherwise.
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80 */
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81
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82 ret = !objc_loadModules(filenames, errorStream,
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83 NULL, &new_header, NULL);
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84
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85 #else /* !HANDLE_OBJC_MODULES */
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86
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87 ret = rld_load(errorStream, &new_header,
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88 filenames, NULL);
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89
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90 #endif /* HANDLE_OBJC_MODULES */
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91
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92 /* extract the error messages for the exception */
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93 if(!ret) {
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94 char *streamBuf;
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95 int len, maxLen;
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96
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97 NXPutc(errorStream, (char)0);
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98
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99 NXGetMemoryBuffer(errorStream,
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100 &streamBuf, &len, &maxLen);
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101 PyErr_SetString(PyExc_ImportError, streamBuf);
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102 }
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103
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104 if(ret && rld_lookup(errorStream, funcname, &ptr))
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105 p = (dl_funcptr) ptr;
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106
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107 NXCloseMemory(errorStream, NX_FREEBUFFER);
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108
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109 if(!ret)
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110 return NULL;
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111 }
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112 #endif /* USE_RLD */
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113 #ifdef USE_DYLD
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114 /* This is also NeXT-specific. However, frameworks (the new style
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115 of shared library) and rld() can't be used in the same program;
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116 instead, you have to use dyld, which is mostly unimplemented. */
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117 {
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118 NSObjectFileImageReturnCode rc;
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119 NSObjectFileImage image;
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120 NSModule newModule;
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121 NSSymbol theSym;
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122 void *symaddr;
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123 const char *errString;
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124
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125 rc = NSCreateObjectFileImageFromFile(pathname, &image);
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126 switch(rc) {
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127 default:
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128 case NSObjectFileImageFailure:
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129 NSObjectFileImageFormat:
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130 /* for these a message is printed on stderr by dyld */
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131 errString = "Can't create object file image";
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132 break;
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133 case NSObjectFileImageSuccess:
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134 errString = NULL;
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135 break;
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136 case NSObjectFileImageInappropriateFile:
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137 errString = "Inappropriate file type for dynamic loading";
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138 break;
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139 case NSObjectFileImageArch:
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140 errString = "Wrong CPU type in object file";
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141 break;
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142 NSObjectFileImageAccess:
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143 errString = "Can't read object file (no access)";
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144 break;
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145 }
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146 if (errString == NULL) {
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147 newModule = NSLinkModule(image, pathname, TRUE);
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148 if (!newModule)
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149 errString = "Failure linking new module";
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150 }
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151 if (errString != NULL) {
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152 PyErr_SetString(PyExc_ImportError, errString);
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153 return NULL;
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154 }
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155 if (!NSIsSymbolNameDefined(funcname)) {
13620
5b727ab37092 Spelling fixes supplied by Rob W. W. Hooft. All these are fixes in either
Thomas Wouters <thomas@python.org>
parents: 13256
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156 /* UnlinkModule() isn't implemented in current versions, but calling it does no harm */
11599
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157 NSUnLinkModule(newModule, FALSE);
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158 PyErr_Format(PyExc_ImportError,
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159 "Loaded module does not contain symbol %.200s",
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160 funcname);
11599
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161 return NULL;
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162 }
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163 theSym = NSLookupAndBindSymbol(funcname);
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164 p = (dl_funcptr)NSAddressOfSymbol(theSym);
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165 }
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166 #endif /* USE_DYLD */
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167
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168 return p;
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169 }