Showing the changes to sys/src/cmd/python/Python/dynload_next.c (1 of 3706 files). Show all
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| 1 | + | |
| 2 | +/* Support for dynamic loading of extension modules on Mac OS X | |
| 3 | +** All references to "NeXT" are for historical reasons. | |
| 4 | +*/ | |
| 5 | + | |
| 6 | +#include "Python.h" | |
| 7 | +#include "importdl.h" | |
| 8 | + | |
| 9 | +#include <mach-o/dyld.h> | |
| 10 | + | |
| 11 | +const struct filedescr _PyImport_DynLoadFiletab[] = { | |
| 12 | + {".so", "rb", C_EXTENSION}, | |
| 13 | + {"module.so", "rb", C_EXTENSION}, | |
| 14 | + {0, 0} | |
| 15 | +}; | |
| 16 | + | |
| 17 | +/* | |
| 18 | +** Python modules are Mach-O MH_BUNDLE files. The best way to load these | |
| 19 | +** is each in a private namespace, so you can load, say, a module bar and a | |
| 20 | +** module foo.bar. If we load everything in the global namespace the two | |
| 21 | +** initbar() symbols will conflict. | |
| 22 | +** However, it seems some extension packages depend upon being able to access | |
| 23 | +** each others' global symbols. There seems to be no way to eat our cake and | |
| 24 | +** have it, so the USE_DYLD_GLOBAL_NAMESPACE define determines which behaviour | |
| 25 | +** you get. | |
| 26 | +*/ | |
| 27 | + | |
| 28 | +#ifdef USE_DYLD_GLOBAL_NAMESPACE | |
| 29 | +#define LINKOPTIONS NSLINKMODULE_OPTION_BINDNOW|NSLINKMODULE_OPTION_RETURN_ON_ERROR | |
| 30 | +#else | |
| 31 | +#define LINKOPTIONS NSLINKMODULE_OPTION_BINDNOW| \ | |
| 32 | + NSLINKMODULE_OPTION_RETURN_ON_ERROR|NSLINKMODULE_OPTION_PRIVATE | |
| 33 | +#endif | |
| 34 | +dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname, | |
| 35 | + const char *pathname, FILE *fp) | |
| 36 | +{ | |
| 37 | + dl_funcptr p = NULL; | |
| 38 | + char funcname[258]; | |
| 39 | + NSObjectFileImageReturnCode rc; | |
| 40 | + NSObjectFileImage image; | |
| 41 | + NSModule newModule; | |
| 42 | + NSSymbol theSym; | |
| 43 | + const char *errString; | |
| 44 | + char errBuf[512]; | |
| 45 | + | |
| 46 | + PyOS_snprintf(funcname, sizeof(funcname), "_init%.200s", shortname); | |
| 47 | + | |
| 48 | +#ifdef USE_DYLD_GLOBAL_NAMESPACE | |
| 49 | + if (NSIsSymbolNameDefined(funcname)) { | |
| 50 | + theSym = NSLookupAndBindSymbol(funcname); | |
| 51 | + p = (dl_funcptr)NSAddressOfSymbol(theSym); | |
| 52 | + return p; | |
| 53 | + } | |
| 54 | +#endif | |
| 55 | + rc = NSCreateObjectFileImageFromFile(pathname, &image); | |
| 56 | + switch(rc) { | |
| 57 | + default: | |
| 58 | + case NSObjectFileImageFailure: | |
| 59 | + case NSObjectFileImageFormat: | |
| 60 | + /* for these a message is printed on stderr by dyld */ | |
| 61 | + errString = "Can't create object file image"; | |
| 62 | + break; | |
| 63 | + case NSObjectFileImageSuccess: | |
| 64 | + errString = NULL; | |
| 65 | + break; | |
| 66 | + case NSObjectFileImageInappropriateFile: | |
| 67 | + errString = "Inappropriate file type for dynamic loading"; | |
| 68 | + break; | |
| 69 | + case NSObjectFileImageArch: | |
| 70 | + errString = "Wrong CPU type in object file"; | |
| 71 | + break; | |
| 72 | + case NSObjectFileImageAccess: | |
| 73 | + errString = "Can't read object file (no access)"; | |
| 74 | + break; | |
| 75 | + } | |
| 76 | + if (errString == NULL) { | |
| 77 | + newModule = NSLinkModule(image, pathname, LINKOPTIONS); | |
| 78 | + if (newModule == NULL) { | |
| 79 | + int errNo; | |
| 80 | + const char *fileName, *moreErrorStr; | |
| 81 | + NSLinkEditErrors c; | |
| 82 | + NSLinkEditError( &c, &errNo, &fileName, &moreErrorStr ); | |
| 83 | + PyOS_snprintf(errBuf, 512, "Failure linking new module: %s: %s", | |
| 84 | + fileName, moreErrorStr); | |
| 85 | + errString = errBuf; | |
| 86 | + } | |
| 87 | + } | |
| 88 | + if (errString != NULL) { | |
| 89 | + PyErr_SetString(PyExc_ImportError, errString); | |
| 90 | + return NULL; | |
| 91 | + } | |
| 92 | +#ifdef USE_DYLD_GLOBAL_NAMESPACE | |
| 93 | + if (!NSIsSymbolNameDefined(funcname)) { | |
| 94 | + /* UnlinkModule() isn't implemented in current versions, but calling it does no harm */ | |
| 95 | + /* NSUnLinkModule(newModule, FALSE); removed: causes problems for ObjC code */ | |
| 96 | + PyErr_Format(PyExc_ImportError, | |
| 97 | + "Loaded module does not contain symbol %.200s", | |
| 98 | + funcname); | |
| 99 | + return NULL; | |
| 100 | + } | |
| 101 | + theSym = NSLookupAndBindSymbol(funcname); | |
| 102 | +#else | |
| 103 | + theSym = NSLookupSymbolInModule(newModule, funcname); | |
| 104 | + if ( theSym == NULL ) { | |
| 105 | + /* NSUnLinkModule(newModule, FALSE); removed: causes problems for ObjC code */ | |
| 106 | + PyErr_Format(PyExc_ImportError, | |
| 107 | + "Loaded module does not contain symbol %.200s", | |
| 108 | + funcname); | |
| 109 | + return NULL; | |
| 110 | + } | |
| 111 | +#endif | |
| 112 | + p = (dl_funcptr)NSAddressOfSymbol(theSym); | |
| 113 | + return p; | |
| 114 | +} | |