3.6.1 Patches

libc++abi_patches.txt

These two commits clean up undefined behavior in readEncodedPointer.

- r231839: Fix PR21580 - Undefined behavior in readEncodedPointer()
  https://llvm.org/bugs/show_bug.cgi?id=21580
  https://github.com/llvm-mirror/libcxxabi/commit/89ea9ad0b0a48a9b9fccf6de81bdca1861960855

- r231852: Remove unneeded const_cast in readPointerHelper. Pointed out by jroelofs
  https://github.com/llvm-mirror/libcxxabi/commit/fdd39fd838828bba84c4f7ad620207ae0d734ad5


These commits how libc++abi matches exception types to catch blocks. In particular it makes libc++abi properly check for multilevel pointer conversions as well as void* conversions.


- r233984: Fix multi-level pointer conversions and pointer to member conversion detection.
  https://github.com/llvm-mirror/libcxxabi/commit/0cb62d1b51f3d9ab65e0ba7b6541dda0663fe50d

- r234254: Disallow Base to Derived conversions for catching pointers to members.
  https://github.com/llvm-mirror/libcxxabi/commit/554d59ab0b989830273c9183f7bdfd12108cad7a

- r236299: Disallow conversions from function pointers to void*.
  https://github.com/llvm-mirror/libcxxabi/commit/b979db159a515fe12b54f793690618313e017259

libc++patches.md

• r225799: Make regex::assign not clobber the regex in case of failure. Fixes PR#22213 https://llvm.org/bugs/show_bug.cgi?id=22213

• r228647: Fix PR#22284. Add a new overload to deque::insert to handle forward iterators. Update tests to exercise this case. https://llvm.org/bugs/show_bug.cgi?id=22284

• r227226: Make __wrap_iter work with gcc. https://llvm.org/bugs/show_bug.cgi?id=22355

• r227359: Fix PR22366. When move-constructing an associative container and explicitly passing an allocator that compares different, we were not calling the destructor of the elements in the moved-from container. https://llvm.org/bugs/show_bug.cgi?id=22366

• r227384: Fix for PR22061 by K-ballo https://llvm.org/bugs/show_bug.cgi?id=22061

• r228839: Fix PR 22541: When values are equal, minmax should return the rightmost one in the initializer_list https://llvm.org/bugs/show_bug.cgi?id=22541

• r228952: Fixed a problem that UBSAN found, where we were calling memcmp(null, p, 0) - which is undefined behavior

• r230120: Try and prevent evaluation of is_default_constructible on tuples default constructor if it is not needed.

• r231729: Fix __RAII_IncreaseAnnotator for increases >= 1

• r232686: Fix PR22922 - Allocator support for std::function does not know how to rebind. https://llvm.org/bugs/show_bug.cgi?id=22922

• r233944: Fix bug in shared_timed_mutex that could cause a program to hang.

Possible:

• https://github.com/llvm-mirror/libcxx/commit/a46f5ce5bbf120f6a056c39a22f8023a816b76fe
• https://github.com/llvm-mirror/libcxx/commit/59f573f670a4ff53919fcdfc2f40725723eb2c04
• https://github.com/llvm-mirror/libcxx/commit/fec08372b8300aa1346485f705cd5c507ada0c53
• https://github.com/llvm-mirror/libcxx/commit/3a4964aef37d746a78d88b632c49290dda824108