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Future change will introduce GetMaxVirtualAddress that will not take
the kernel area into account.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@317638 91177308-0d34-0410-b5e6-96231b3b80d8
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https://reviews.llvm.org/D31796 results in LLD emitting __cfi_check
as a weak symbol, while Gold keeps it strong. Accept both.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@299804 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@299604 91177308-0d34-0410-b5e6-96231b3b80d8
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The definitions in sanitizer_common may conflict with definitions from system headers because:
The runtime includes the system headers after the project headers (as per LLVM coding guidelines).
lib/sanitizer_common/sanitizer_internal_defs.h pollutes the namespace of everything defined after it, which is all/most of the sanitizer .h and .cc files and the included system headers with: using namespace __sanitizer; // NOLINT
This patch solves the problem by introducing the namespace only within the sanitizer namespaces as proposed by Dmitry.
Differential Revision: https://reviews.llvm.org/D21947
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@281657 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Introducing InitializeCommonFlags accross all sanitizers to simplify
common flags management.
Setting coverage=1 when html_cov_report is requested.
Differential Revision: http://reviews.llvm.org/D18273
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@263820 91177308-0d34-0410-b5e6-96231b3b80d8
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Avoid crashing when printing diagnostics for vtable-related CFI
errors. In diagnostic mode, the frontend does an additional check of
the vtable pointer against the set of all known vtable addresses and
lets the runtime handler know if it is safe to inspect the vtable.
http://reviews.llvm.org/D16824
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@259717 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Since the prototype of mremap is
```
void *mremap(void *old_address, size_t old_size, size_t new_size,
int flags, ... /* void *new_address*/);
```
we need to cast new_address to void * when calling mremap. Otherwise,
the wrong value will be passed to mremap on x32.
Patch by H.J Lu!
Reviewers: kcc, eugenis, samsonov
Subscribers: samsonov, llvm-commits
Differential Revision: http://reviews.llvm.org/D16805
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@259540 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@259085 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@259007 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@258977 91177308-0d34-0410-b5e6-96231b3b80d8
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Calls to __cfi_slowpath_diag are only emitted when building with
diagnostics, and linking the diag rtl.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@258881 91177308-0d34-0410-b5e6-96231b3b80d8
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This change enables diagnostics when the target address for a CFI
check is out of bounds of any known library, or even not in the
limits of the address space. This happens when casting pointers to
uninitialized memory.
Ubsan code does not yet handle some of these situations correctly,
so it is still possible to see a segmentation fault instead of a
proper diagnostic message once in a while.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@258879 91177308-0d34-0410-b5e6-96231b3b80d8
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Move all internal stuff into namespace __cfi.
Remove the double underscore prefix from anything that's now inside
the namespace.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@258859 91177308-0d34-0410-b5e6-96231b3b80d8
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Add dlopen/dlclose interceptors to update CFI shadow for loaded/unloaded libraries.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@258857 91177308-0d34-0410-b5e6-96231b3b80d8
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* add __cfi_slowpath_diag with a 3rd parameter which is a pointer to
the diagnostic info for the ubsan handlers.
*__cfi_check gets a 3rd parameter as well.
* unify vcall/cast/etc and icall diagnostic info format, and merge
the handlers to have a single entry point (actually two points due
to abort/noabort variants).
* tests
Note that this comes with a tiny overhead in the non-diag mode:
cfi_slowpath must pass 0 as the 3rd argument to cfi_check.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@258744 91177308-0d34-0410-b5e6-96231b3b80d8
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The first argument is uint64_t, not uintptr_t.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@257233 91177308-0d34-0410-b5e6-96231b3b80d8
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CFI shadow for non-CFI libraries should be "unchecked", not "invalid".
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@256285 91177308-0d34-0410-b5e6-96231b3b80d8
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Split the CFI runtime in two: cfi and cfi_diag. The latter includes
UBSan runtime to allow printing diagnostics.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@255735 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@255733 91177308-0d34-0410-b5e6-96231b3b80d8
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The current check may break if the starting address in fill_shadow is
not page-aligned.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@255725 91177308-0d34-0410-b5e6-96231b3b80d8
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This is an initial version of the runtime cross-DSO CFI support
library.
It contains a number of FIXMEs, ex. it does not support the
diagnostic mode nor dlopen/dlclose, but it works and can be tested.
Diagnostic mode, in particular, would require some refactoring (we'd
like to gather all CFI hooks in the UBSan library into one function
so that we could easier pass the diagnostic information down to
__cfi_check). It will be implemented later.
Once the diagnostic mode is in, I plan to create a second test
configuration to run all existing tests in both modes. For now, this
patch includes only a few new cross-DSO tests.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@255695 91177308-0d34-0410-b5e6-96231b3b80d8
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