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2013-03-21[msan] Add an option to disable poisoning of shadow for undef values.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177630 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-20Call the new llvm_gcov_init function to register the environment.Bill Wendling
Use the new `llvm_gcov_init' function to register the writeout and flush functions. The initialization function will also call `atexit' for some cleanups and final writout calls. But it does this only once. This is better than checking for the `main' function, because in a library that function may not exist. <rdar://problem/12439551> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177579 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-19Register the GCOV writeout functions so that they're emitted serially.Bill Wendling
We don't want to write out >1000 files at the same time. That could make things prohibitively expensive. Instead, register the "writeout" function so that it's emitted serially. <rdar://problem/12439551> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177437 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-19Emit the linkage name instead of the function name, when available. This meansNick Lewycky
that we'll prefer to emit the mangled C++ name (pending a clang change). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177371 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-18Register the flush function for each compile unit.Bill Wendling
For each compile unit, we want to register a function that will flush that compile unit. Otherwise, __gcov_flush() would only flush the counters within the current compile unit, and not any outside of it. PR15191 & <rdar://problem/13167507> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177340 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-18[asan] when creating string constants, set unnamed_attr and align 1 so that ↵Kostya Serebryany
equal strings are merged by the linker. Observed up to 1% binary size reduction. Thanks to Anton Korobeynikov for the suggestion git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177264 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-18[asan] while generating the description of a global variable, emit the ↵Kostya Serebryany
module name in a separate field, thus not duplicating this information if every description. This decreases the binary size (observed up to 3%). https://code.google.com/p/address-sanitizer/issues/detail?id=168 . This changes the asan API version. llvm-part git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177254 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-18[asan] don't instrument functions with available_externally linkage. This ↵Kostya Serebryany
saves a bit of compile time and reduces the number of redundant global strings generated by asan (https://code.google.com/p/address-sanitizer/issues/detail?id=167) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177250 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-14[ASan] emit instrumentation for initialization order checking by defaultAlexey Samsonov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177063 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-14Remove accidentally committed debug line.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177005 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-14Refactor GCOV's six constructor arguments into a struct with a getter thatNick Lewycky
constructs default arguments. It can now take default arguments from cl::opt'ions. Add a new -default-gcov-version=... option, and actually test it! Sink the reverse-order of the version into GCOVProfiling, hiding it from our users. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177002 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-13No functionality change. Rename emitGCNO() to the more sensibleNick Lewycky
emitProfileNotes(), similar to emitProfileArcs(). Also update its comment. Also add a comment on Version[4] (there will be another comment in clang later), and compress lines that exceeded 80 columns. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176994 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-09Use the correct index variable. This is the meat of what was supposed to be inNick Lewycky
r176751. Also, learn a lesson about applying patches by hand/eyeball. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176764 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-09Fix bug introduced in r176616 when making function identifier numbers stable.Nick Lewycky
Count the subprograms, not the compile units. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176751 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-09Don't emit the extra checksum into the .gcda file if the user hasn't asked forNick Lewycky
it. Fortunately, versions of gcov that predate the extra checksum also ignore any extra data, so this isn't a problem. There will be a matching commit in compiler-rt. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176745 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07Switch from a version 4.2/4.4 switch to a four-byte version string to be putNick Lewycky
into the actual gcov file. Instead of using the bottom 4 bytes as the function identifier, use a counter. This makes the identifier numbers stable across multiple runs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176616 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-28[msan] Implement sanitize_memory attribute.Evgeniy Stepanov
Shadow checks are disabled and memory loads always produce fully initialized values in functions that don't have a sanitize_memory attribute. Value and argument shadow is propagated as usual. This change also updates blacklist behaviour to match the above. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176247 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-28Remove unused leftover declarations.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176240 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-27In GCC 4.7, function names are now forbidden from .gcda files. Support this byNick Lewycky
passing a null pointer to the function name in to GCDAProfiling, and add another switch onto GCOVProfiling. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176173 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-27Doh, fix behaviour change introduced in r176168 which is tested in clang,Nick Lewycky
not llvm. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176172 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-27IRBuilder has grown all sorts of useful utility functions. Make use of them toNick Lewycky
clean up this code a tiny bit. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176168 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-26Unify clang/llvm attributes for asan/tsan/msan (LLVM part)Kostya Serebryany
These are two related changes (one in llvm, one in clang). LLVM: - rename address_safety => sanitize_address (the enum value is the same, so we preserve binary compatibility with old bitcode) - rename thread_safety => sanitize_thread - rename no_uninitialized_checks -> sanitize_memory CLANG: - add __attribute__((no_sanitize_address)) as a synonym for __attribute__((no_address_safety_analysis)) - add __attribute__((no_sanitize_thread)) - add __attribute__((no_sanitize_memory)) for S in address thread memory If -fsanitize=S is present and __attribute__((no_sanitize_S)) is not set llvm attribute sanitize_S git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176075 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-20[asan] instrument invoke insns with noreturn attribute (as well as call insns)Kostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175617 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-19[asan] instrument memory accesses with unusual sizesKostya Serebryany
This patch makes asan instrument memory accesses with unusual sizes (e.g. 5 bytes or 10 bytes), e.g. long double or packed structures. Instrumentation is done with two 1-byte checks (first and last bytes) and if the error is found __asan_report_load_n(addr, real_size) or __asan_report_store_n(addr, real_size) is called. Also, call these two new functions in memset/memcpy instrumentation. asan-rt part will follow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175507 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-18[asan] revert r175266 as it breaks code with packed structures. supporting ↵Kostya Serebryany
long double will require a more general solution git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175442 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-15[asan] support long double on 64-bit. See ↵Kostya Serebryany
https://code.google.com/p/address-sanitizer/issues/detail?id=151 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175266 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-13[asan] fix confusing indentationKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175033 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12[ASan] Do not use kDefaultShort64bitShadowOffset on Mac, where the binaries ↵Alexander Potapenko
may get mapped at 0x100000000+ and thus may interleave with the shadow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174964 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12[asan] change the default mapping offset on x86_64 to 0x7fff8000. This gives ↵Kostya Serebryany
roughly 5% speedup. Since this is an ABI change, bump the asan ABI version by renaming __asan_init to __asan_init_v1. llvm part, compiler-rt part will follow git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174957 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-11[asan] added a flag -mllvm asan-short-64bit-mapping-offset=1 (0 by default)Kostya Serebryany
This flag makes asan use a small (<2G) offset for 64-bit asan shadow mapping. On x86_64 this saves us a register, thus achieving ~2/3 of the zero-base-offset's benefits in both performance and code size. Thanks Jakub Jelinek for the idea. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174886 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-08Revert "Add LLVMContext::emitWarning methods and use them. ↵Bob Wilson
<rdar://problem/12867368>" This reverts r171041. This was a nice idea that didn't work out well. Clang warnings need to be associated with warning groups so that they can be selectively disabled, promoted to errors, etc. This simplistic patch didn't allow for that. Enhancing it to provide some way for the backend to specify a front-end warning type seems like overkill for the few uses of this, at least for now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174748 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-29Fixing warnings revealed by gcc release buildEdwin Vane
Fixed set-but-not-used warnings. Reviewer: gribozavr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173810 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-28[msan] Mostly disable msan-handle-icmp-exact.Evgeniy Stepanov
It is way too slow. Change the default option value to 0. Always do exact shadow propagation for unsigned ICmp with constants, it is cheap (under 1% cpu time) and required for correctness. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173682 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-28Revert r173678.Evgeniy Stepanov
Broken tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173679 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-28[msan] Make msan-handle-icmp-exact=0 by default.Evgeniy Stepanov
50% slowdown on one of the specs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173678 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-25[msan] A comment on ICmp handling logic.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173453 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-25[msan] Implement exact shadow propagation for relational ICmp.Evgeniy Stepanov
Only for integers, pointers, and vectors of those. No floats. Instrumentation seems very heavy, and may need to be replaced with some approximation in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173452 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-24[asan] fix 32-bit buildsKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173338 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-24[asan] adaptive redzones for globals (the larger the global the larger is ↵Kostya Serebryany
the redzone) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173335 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-23[asan] use ADD instead of OR when applying shadow offset of PowerPC. See ↵Kostya Serebryany
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55975 for details git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173258 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-23Use the AttributeSet when removing multiple attributes. Use Attribute::AttrKindBill Wendling
when removing one attribute. This further encapsulates the use of the attributes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173214 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-22[msan] Export the value of msan-keep-going flag for the runtime.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173156 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-22[msan] Do not insert check on volatile store.Evgeniy Stepanov
Volatile bitfields can cause valid stores of uninitialized bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173153 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-19Sort all of the includes. Several files got checked in with mis-sortedChandler Carruth
includes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172891 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-1880 columnsAlexey Samsonov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172813 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-18Move Blacklist.h to include/ to enable use from clang.Will Dietz
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172806 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-17ASan: add optional 'zero-based shadow' option to ASan passes. Always tell ↵Alexey Samsonov
the values of shadow scale and offset to the runtime git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172709 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-16ASan: wrap mapping scale and offset in a struct and make it a member of ASan ↵Alexey Samsonov
passes. Add test for non-default mapping scale and offset. No functionality change git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172610 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-15[msan] Fix handling of equality comparison of pointer vectors.Evgeniy Stepanov
Also improve test coveration of the handling of relational comparisons. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172539 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-10[msan] Change va_start/va_copy shadow memset alignment to 8.Peter Collingbourne
This fixes va_start/va_copy of a va_list field which happens to not be laid out at a 16-byte boundary. Differential Revision: http://llvm-reviews.chandlerc.com/D276 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172128 91177308-0d34-0410-b5e6-96231b3b80d8
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