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| author | Eric Fiselier <eric@efcs.ca> | 2018-07-26 00:34:50 +0000 |
|---|---|---|
| committer | Eric Fiselier <eric@efcs.ca> | 2018-07-26 00:34:50 +0000 |
| commit | 1e1f8ece3b3c290ed0a67e21367f0a8805ee67d4 (patch) | |
| tree | 1899e2300eb27b444d2edbfc87a2361a137ca39c /llvm/lib/Support/Error.cpp | |
| parent | 5c1e23b2e315458b8f079f543bccddff0fc09cf9 (diff) | |
| download | llvm-1e1f8ece3b3c290ed0a67e21367f0a8805ee67d4.zip llvm-1e1f8ece3b3c290ed0a67e21367f0a8805ee67d4.tar.gz llvm-1e1f8ece3b3c290ed0a67e21367f0a8805ee67d4.tar.bz2 | |
[libc++] Add hack to allow ubsan to work w/o compiler-rt (__muloti4 is undefined)
Summary:
Using int128_t with UBSAN causes link errors unless compiler-rt is providing the runtime library.
Specifically ubsan generates calls to __muloti4 but libgcc doesn't provide a definition.
In order to avoid this, and allow users to continue using sanitized versions of libc++, this patch introduces a hack.
It adds a cribbed version of the compiler-rt builtin to the libc++ filesystem sources.
I don't think this approach will work in the long run, but it seems OK for now.
Also see:
https://bugs.llvm.org/show_bug.cgi?id=30643
https://bugs.llvm.org/show_bug.cgi?id=16404
Reviewers: mclow.lists, ldionne, rsmith, jyknight, echristo
Reviewed By: echristo
Subscribers: dberris, cfe-commits
Differential Revision: https://reviews.llvm.org/D49828
llvm-svn: 337990
Diffstat (limited to 'llvm/lib/Support/Error.cpp')
0 files changed, 0 insertions, 0 deletions