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Otherwise optimizations done in klee won't have any effect.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
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stdin symbolic and removed unused arguments to main.
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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
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parallel.
- It would be nice if there was an easier way to do this that didn't involve
editing all of the tests (like running each test in its own directory), but
this approach fixes #146 and doesn't involve changing 'lit' or writing a
wrapper harness. My assumption is a lot of tests start are derived from
another one, so hopefully following this convention won't be burdensome, and
I updated 'make check' so that it will produce an error if any test runs klee
without --output-dir (by checking for the existing of klee-last files).
- This also helps with #147 but I still can't fully run tests in parallel (I
start hitting STP errors).
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git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@154110 91177308-0d34-0410-b5e6-96231b3b80d8
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- Lots more tweaks, documentation, and web page content is needed,
but this should compile & work on OS X & Linux.
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@72205 91177308-0d34-0410-b5e6-96231b3b80d8
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