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author | Martin Nowack <martin.nowack@gmail.com> | 2018-05-05 00:04:13 +0100 |
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committer | Cristian Cadar <c.cadar@imperial.ac.uk> | 2018-05-05 10:35:28 +0100 |
commit | ab03c1cdce90660dcb75d000ebda817ae589aaec (patch) | |
tree | 7d884b530e8940bc0de8d3227ac944d3798282bb /lib/Core/Memory.h | |
parent | 4211cea27f1903f68c2b32267eb34cb95c24b9f3 (diff) | |
download | klee-ab03c1cdce90660dcb75d000ebda817ae589aaec.tar.gz |
Fix handling of errno if external functions are invoked
If an external function in KLEE is invoked, it might update errno. Previously, the errno specific variable in a state was only updated if it was part of the executed instructions. That opened up a timeframe that increased the likelihood of errno being overwritten by another method call. This patch fixes two issues: * the errno of the KLEE process state is updated before the external function call allowing to detect changes to it later on * after the external call, the memory object of errno is directly updated with its new value, reducing the likelihood to be overwritten by another call Additional features: * Add support for `errno()` for Darwin as well. * Simplified errno handling in POSIX layer
Diffstat (limited to 'lib/Core/Memory.h')
-rw-r--r-- | lib/Core/Memory.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Core/Memory.h b/lib/Core/Memory.h index 3084cf32..e854502c 100644 --- a/lib/Core/Memory.h +++ b/lib/Core/Memory.h @@ -154,6 +154,7 @@ private: const MemoryObject *object; uint8_t *concreteStore; + // XXX cleanup name of flushMask (its backwards or something) BitArray *concreteMask; |