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| author | Richard Smith <richard-llvm@metafoo.co.uk> | 2012-08-24 00:01:19 +0000 |
|---|---|---|
| committer | Richard Smith <richard-llvm@metafoo.co.uk> | 2012-08-24 00:01:19 +0000 |
| commit | b080e2fb1c8164c95e6f8d06754f0c7637eeae7b (patch) | |
| tree | 145515903474dbdde6c1f4aa3147850b0031e7a2 /lib/Support | |
| parent | 5d04a3ad0e202a50122d6739c9af533575254a80 (diff) | |
| download | external_llvm-b080e2fb1c8164c95e6f8d06754f0c7637eeae7b.zip external_llvm-b080e2fb1c8164c95e6f8d06754f0c7637eeae7b.tar.gz external_llvm-b080e2fb1c8164c95e6f8d06754f0c7637eeae7b.tar.bz2 | |
Fix undefined behavior (signed integer overflow) when Clang parses a hexfloat with an enormous exponent. Caught by an existing unit test + -ftrapv.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162505 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support')
| -rw-r--r-- | lib/Support/APFloat.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp index ed261a4..f143e6d 100644 --- a/lib/Support/APFloat.cpp +++ b/lib/Support/APFloat.cpp @@ -196,8 +196,10 @@ totalExponent(StringRef::iterator p, StringRef::iterator end, assert(value < 10U && "Invalid character in exponent"); unsignedExponent = unsignedExponent * 10 + value; - if (unsignedExponent > 32767) + if (unsignedExponent > 32767) { overflow = true; + break; + } } if (exponentAdjustment > 32767 || exponentAdjustment < -32768) |