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dereferences"
Updated: Removed offending TODO comment.
Dereferences with addresses above the 48-bit hardware addressable range
produce "invalid instruction" (instead of "invalid access") hardware
exceptions (there is no hardware address decoding logic for those bits),
and the address provided by this exception is the address of the
instruction (not the faulting address). The kernel maps the "invalid
instruction" to SEGV, but fails to provide the real fault address.
Because of this ASan lies and says that those cases are null
dereferences. This downgrades the severity of a found bug in terms of
security. In the ASan signal handler, we can not provide the real
faulting address, but at least we can try not to lie.
rdar://50366151
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D68676
llvm-svn: 374265
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@374384 91177308-0d34-0410-b5e6-96231b3b80d8
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dereferences"
As it was breaking bots running sanitizer lint check
This reverts r374265 (git b577efe4567f1f6a711ad36e1d17280dd1c4f009)
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@374308 91177308-0d34-0410-b5e6-96231b3b80d8
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Dereferences with addresses above the 48-bit hardware addressable range
produce "invalid instruction" (instead of "invalid access") hardware
exceptions (there is no hardware address decoding logic for those bits),
and the address provided by this exception is the address of the
instruction (not the faulting address). The kernel maps the "invalid
instruction" to SEGV, but fails to provide the real fault address.
Because of this ASan lies and says that those cases are null
dereferences. This downgrades the severity of a found bug in terms of
security. In the ASan signal handler, we can not provide the real
faulting address, but at least we can try not to lie.
rdar://50366151
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D68676
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@374265 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@371687 91177308-0d34-0410-b5e6-96231b3b80d8
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- Unless explicit configuration, using FreeBSD super pages feature for shadow mapping.
- asan only for now.
Reviewers: dim, emaste, vitalybuka
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D65851
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@370008 91177308-0d34-0410-b5e6-96231b3b80d8
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in madvise mode, the shadow pages will be migrated only via madvise explicit calls.
Reviewers: vitalybuka
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D65775
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@368090 91177308-0d34-0410-b5e6-96231b3b80d8
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Disabling Transparent huge page mode refactored in one function.
Reviewers: vitalybuka
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D65771
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@367925 91177308-0d34-0410-b5e6-96231b3b80d8
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See https://reviews.llvm.org/D58620 for discussion, and for the commands
I ran. In addition I also ran
for f in $(svn diff | diffstat | grep .cc | cut -f 2 -d ' '); do rg $f . ; done
and manually updated (many) references to renamed files found by that.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@367463 91177308-0d34-0410-b5e6-96231b3b80d8
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