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Author SHA1 Message Date
Peter Collingbourne e530af8e1d Introduce -fsanitize-trap= flag. 
This flag controls whether a given sanitizer traps upon detecting
an error. It currently only supports UBSan. The existing flag
-fsanitize-undefined-trap-on-error has been made an alias of
-fsanitize-trap=undefined.

This change also cleans up some awkward behavior around the combination
of -fsanitize-trap=undefined and -fsanitize=undefined. Previously we
would reject command lines containing the combination of these two flags,
as -fsanitize=vptr is not compatible with trapping. This required the
creation of -fsanitize=undefined-trap, which excluded -fsanitize=vptr
(and -fsanitize=function, but this seems like an oversight).

Now, -fsanitize=undefined is an alias for -fsanitize=undefined-trap,
and if -fsanitize-trap=undefined is specified, we treat -fsanitize=vptr
as an "unsupported" flag, which means that we error out if the flag is
specified explicitly, but implicitly disable it if the flag was implied
by -fsanitize=undefined.

Differential Revision: http://reviews.llvm.org/D10464

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@240105 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-06-18 23:59:22 +00:00
Richard Smith 69170e6e41 Split -fsanitize=bounds to -fsanitize=array-bounds (for the frontend-inserted 
check using the ubsan runtime) and -fsanitize=local-bounds (for the middle-end
check which inserts traps).

Remove -fsanitize=local-bounds from -fsanitize=undefined. It does not produce
useful diagnostics and has false positives (PR17635), and is not a good
compromise position between UBSan's checks and ASan's checks.

Map -fbounds-checking to -fsanitize=local-bounds to restore Clang's historical
behavior for that flag.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193205 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-10-22 22:51:04 +00:00
Joey Gouly 8548908080 PR14306: Move -fbounds-checking to -fsanitize=bounds. 
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168510 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-23 10:39:49 +00:00
Nuno Lopes def18494b9 wire -fbounds-checking to the new LLVM bounds checking pass 
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157262 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-05-22 17:19:45 +00:00
Nuno Lopes 3e86a0433d revert the usage of the objectsize intrinsic with 3 parameters (to match LLVM r157255) 
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157256 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-05-22 15:26:48 +00:00
Nuno Lopes 08a9ae95ba update calls to objectsize intrinsic to match LLVM r156473 
add a test for -fbounds-checking code generation

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156474 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-05-09 15:53:34 +00:00