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Summary:
private and internal: should not trigger ODR at all.
unnamed_addr: current ODR checking approach fail and rereport false violation if
a linker merges such globals
linkonce_odr, weak_odr: could cause similar problems and they are already not
instrumented for ELF.
Reviewers: eugenis, kcc
Subscribers: kubamracek, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D55621
llvm-svn: 349015
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Reviewers: eugenis, m.ostapenko, ygribov
Subscribers: mehdi_amini, kubamracek, hiraditya, steven_wu, dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D55156
llvm-svn: 348316
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Summary:
--asan-use-private-alias increases binary sizes by 10% or more.
Most of this space was long names of aliases and new symbols.
These symbols are not needed for the ODC check at all.
Reviewers: eugenis
Subscribers: hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D55146
llvm-svn: 348221
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As discussed in https://github.com/google/sanitizers/issues/398, with current
implementation of poisoning globals we can have some CHECK failures or false
positives in case of mixing instrumented and non-instrumented code due to ASan
poisons innocent globals from non-sanitized binary/library. We can use private
aliases to avoid such errors. In addition, to preserve ODR violation detection,
we introduce new __odr_asan_gen_XXX symbol for each instrumented global that
indicates if this global was already registered. To detect ODR violation in
runtime, we should only check the value of indicator and report an error if it
isn't equal to zero.
Differential Revision: http://reviews.llvm.org/D15642
llvm-svn: 260075
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