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| author | Nicola Pero <nicola.pero@meta-innovation.com> | 2011-10-09 10:29:50 +0000 |
|---|---|---|
| committer | Nicola Pero <nicola@gcc.gnu.org> | 2011-10-09 10:29:50 +0000 |
| commit | b4a50e4336a0d62a41e56b7e785211727543a1b3 (patch) | |
| tree | 52323cadfeff71297cb073de42a81990ba9f9e54 /libobjc/init.c | |
| parent | 68e291ec19d388cf2c79ea01a826cfb3ca27b5a5 (diff) | |
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In libobjc/: 2011-10-09 Nicola Pero <nicola.pero@meta-innovation.com>
In libobjc/:
2011-10-09 Nicola Pero <nicola.pero@meta-innovation.com>
PR libobjc/49883
* init.c (__objc_exec_class): Work around a bug in clang's code
generation. Clang sets the class->info field to values different
from 0x1 or 0x2 (the only allowed values in the traditional GNU
Objective-C runtime ABI) to store some additional information, but
this breaks backwards compatibility. Wipe out all the bits in the
fields other than the first two upon loading a class.
2011-10-09 Nicola Pero <nicola.pero@meta-innovation.com>
* class.c (objc_lookup_class): Added back for compatibility with
clang which seems to emit calls to it.
From-SVN: r179721
Diffstat (limited to 'libobjc/init.c')
| -rw-r--r-- | libobjc/init.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libobjc/init.c b/libobjc/init.c index d4475b3..23ba41b 100644 --- a/libobjc/init.c +++ b/libobjc/init.c @@ -643,6 +643,15 @@ __objc_exec_class (struct objc_module *module) assert (CLS_ISMETA (class->class_pointer)); DEBUG_PRINTF (" installing class '%s'\n", class->name); + /* Workaround for a bug in clang: Clang may set flags other than + _CLS_CLASS and _CLS_META even when compiling for the + traditional ABI (version 8), confusing our runtime. Try to + wipe these flags out. */ + if (CLS_ISCLASS (class)) + __CLS_INFO (class) = _CLS_CLASS; + else + __CLS_INFO (class) = _CLS_META; + /* Initialize the subclass list to be NULL. In some cases it isn't and this crashes the program. */ class->subclass_list = NULL; |