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libcxxrt: Insert padding in __cxa_dependent_exception

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Padding was added to __cxa_exception in 45ca8b19 and
__cxa_dependent_exception needs the same layout.
Add some static_asserts to detect this in the future.

Merge of libcxxrt commit b00c6c564357
This commit is contained in:
Ed Maste 2022-04-27 09:15:09 -04:00
parent b40c0db6f6
commit c40e434988
1 changed files with 12 additions and 0 deletions
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12
contrib/libcxxrt/exception.cc
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@ -197,6 +197,7 @@ struct __cxa_thread_info
struct __cxa_dependent_exception
{
#if __LP64__
void *reserve;
void *primaryException;
#endif
std::type_info *exceptionType;
@ -219,6 +220,17 @@ struct __cxa_dependent_exception
#endif
_Unwind_Exception unwindHeader;
};
static_assert(sizeof(__cxa_exception) == sizeof(__cxa_dependent_exception),
"__cxa_exception and __cxa_dependent_exception should have the same size");
static_assert(offsetof(__cxa_exception, referenceCount) ==
offsetof(__cxa_dependent_exception, primaryException),
"referenceCount and primaryException should have the same offset");
static_assert(offsetof(__cxa_exception, unwindHeader) ==
offsetof(__cxa_dependent_exception, unwindHeader),
"unwindHeader fields should have the same offset");
static_assert(offsetof(__cxa_dependent_exception, unwindHeader) ==
offsetof(__cxa_dependent_exception, adjustedPtr) + 8,
"there should be no padding before unwindHeader");
namespace std