Python code coverage for Python/dynload_next.c

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