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* Remove the very substantial, largely unmaintained legacy PGOChandler Carruth2013-10-02
| | | | | | | | | | | | | | | | | | | | infrastructure. This was essentially work toward PGO based on a design that had several flaws, partially dating from a time when LLVM had a different architecture, and with an effort to modernize it abandoned without being completed. Since then, it has bitrotted for several years further. The result is nearly unusable, and isn't helping any of the modern PGO efforts. Instead, it is getting in the way, adding confusion about PGO in LLVM and distracting everyone with maintenance on essentially dead code. Removing it paves the way for modern efforts around PGO. Among other effects, this removes the last of the runtime libraries from LLVM. Those are being developed in the separate 'compiler-rt' project now, with somewhat different licensing specifically more approriate for runtimes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191835 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove several unused variables.Rafael Espindola2013-10-01
| | | | | | Patch by Alp Toker. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191757 91177308-0d34-0410-b5e6-96231b3b80d8
* BoundsChecking: Fix refacto.Benjamin Kramer2013-09-30
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191676 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert manual insert point restores to the new RAII object.Benjamin Kramer2013-09-30
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191675 91177308-0d34-0410-b5e6-96231b3b80d8
* Use right pointer type in DebugIRMatt Arsenault2013-09-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191576 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix -Wreturn-type warnings in non-self-hosted build.Evgeniy Stepanov2013-09-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191361 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Handling of atomic load/store, atomic rmw, cmpxchg.Evgeniy Stepanov2013-09-24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191287 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Wrap indirect functions.Evgeniy Stepanov2013-09-19
| | | | | | | | | | Adds a flag to the MemorySanitizer pass that enables runtime rewriting of indirect calls. This is part of MSanDR implementation and is needed to return control to the DynamiRio-based helper tool on transition between instrumented and non-instrumented modules. Disabled by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191006 91177308-0d34-0410-b5e6-96231b3b80d8
* [asan] call __asan_stack_malloc_N only if use-after-return detection is ↵Kostya Serebryany2013-09-18
| | | | | | enabled with the run-time option git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190939 91177308-0d34-0410-b5e6-96231b3b80d8
* ifndef NDEBUG-out an asserts-only constant committed in r190863David Blaikie2013-09-18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190905 91177308-0d34-0410-b5e6-96231b3b80d8
* [asan] inline the calls to __asan_stack_free_* with small sizes. Yet another ↵Kostya Serebryany2013-09-17
| | | | | | 10%-20% speedup for use-after-return git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190863 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Check return value of main().Evgeniy Stepanov2013-09-16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190782 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Add source file:line to stack origin reports.Evgeniy Stepanov2013-09-13
| | | | | | | Compiler part. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190689 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Give internal classes hidden visibility."Benjamin Kramer2013-09-11
| | | | | | | It works with clang, but GCC has different rules so we can't make all of those hidden. This reverts commit r190534. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190536 91177308-0d34-0410-b5e6-96231b3b80d8
* Give internal classes hidden visibility.Benjamin Kramer2013-09-11
| | | | | | Worth 100k on a linux/x86_64 Release+Asserts clang. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190534 91177308-0d34-0410-b5e6-96231b3b80d8
* [asan] refactor the use-after-return API so that the size class is computed ↵Kostya Serebryany2013-09-10
| | | | | | at compile time instead of at run-time. llvm part git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190407 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert patches to add case-range support for PR1255.Bob Wilson2013-09-09
| | | | | | | | | | | | | | | | | The work on this project was left in an unfinished and inconsistent state. Hopefully someone will eventually get a chance to implement this feature, but in the meantime, it is better to put things back the way the were. I have left support in the bitcode reader to handle the case-range bitcode format, so that we do not lose bitcode compatibility with the llvm 3.3 release. This reverts the following commits: 155464, 156374, 156377, 156613, 156704, 156757, 156804 156808, 156985, 157046, 157112, 157183, 157315, 157384, 157575, 157576, 157586, 157612, 157810, 157814, 157815, 157880, 157881, 157882, 157884, 157887, 157901, 158979, 157987, 157989, 158986, 158997, 159076, 159101, 159100, 159200, 159201, 159207, 159527, 159532, 159540, 159583, 159618, 159658, 159659, 159660, 159661, 159703, 159704, 160076, 167356, 172025, 186736 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190328 91177308-0d34-0410-b5e6-96231b3b80d8
* TBAA: add isTBAAVtableAccess to MDNode so clients can call the functionManman Ren2013-09-06
| | | | | | | | | | | | | | instead of having its own implementation. The implementation of isTBAAVtableAccess is in TypeBasedAliasAnalysis.cpp since it is related to the format of TBAA metadata. The path for struct-path tbaa will be exercised by test/Instrumentation/ThreadSanitizer/read_from_global.ll, vptr_read.ll, and vptr_update.ll when struct-path tbaa is on by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190216 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of select with struct arguments.Evgeniy Stepanov2013-09-03
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189796 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix select instrumentation.Evgeniy Stepanov2013-09-03
| | | | | | | | Select condition shadow was being ignored resulting in false negatives. This change OR-s sign-extended condition shadow into the result shadow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189785 91177308-0d34-0410-b5e6-96231b3b80d8
* 80 colsAlexey Samsonov2013-08-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189473 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: Implement trampolines for function pointers passed to ↵Peter Collingbourne2013-08-27
| | | | | | | | custom functions. Differential Revision: http://llvm-reviews.chandlerc.com/D1503 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189408 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: correctly combine labels in the case where they are equal.Peter Collingbourne2013-08-23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189133 91177308-0d34-0410-b5e6-96231b3b80d8
* [msan] Fix handling of va_arg overflow area on x86_64.Evgeniy Stepanov2013-08-23
| | | | | | | | | | The code was erroneously reading overflow area shadow from the TLS slot, bypassing the local copy. Reading shadow directly from TLS is wrong, because it can be overwritten by a nested vararg call, if that happens before va_start. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189104 91177308-0d34-0410-b5e6-96231b3b80d8
* 80 colsAlexey Samsonov2013-08-23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189091 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: Replace non-instrumented aliases of instrumented ↵Peter Collingbourne2013-08-22
| | | | | | | | functions, and vice versa, with wrappers. Differential Revision: http://llvm-reviews.chandlerc.com/D1442 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189054 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: Factor the wrapper builder out to buildWrapperFunction.Peter Collingbourne2013-08-22
| | | | | | Differential Revision: http://llvm-reviews.chandlerc.com/D1441 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189053 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: Prefix the name of each instrumented function with "dfs$".Peter Collingbourne2013-08-22
| | | | | | | | | | | | | | | | DFSan changes the ABI of each function in the module. This makes it possible for a function with the native ABI to be called with the instrumented ABI, or vice versa, thus possibly invoking undefined behavior. A simple way of statically detecting instances of this problem is to prepend the prefix "dfs$" to the name of each instrumented-ABI function. This will not catch every such problem; in particular function pointers passed across the instrumented-native barrier cannot be used on the other side. These problems could potentially be caught dynamically. Differential Revision: http://llvm-reviews.chandlerc.com/D1373 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189052 91177308-0d34-0410-b5e6-96231b3b80d8
* Move registering the execution of a basic block to the beginning rather than ↵Bill Wendling2013-08-20
| | | | | | | | | | | | | | | | | | the end. There are situations which can affect the correctness (or at least expectation) of the gcov output. For instance, if a call to __gcov_flush() occurs within a block before the execution count is registered and then the program aborts in some way, then that block will not be marked as executed. This is not normally what the user expects. If we move the code that's registering when a block is executed to the beginning, we can catch these types of situations. PR16893 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188849 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: Add a debugging feature to help us track nonzero labels.Peter Collingbourne2013-08-15
| | | | | | | | | | | | | | | | | | Summary: When the -dfsan-debug-nonzero-labels parameter is supplied, the code is instrumented such that when a call parameter, return value or load produces a nonzero label, the function __dfsan_nonzero_label is called. The idea is that a debugger breakpoint can be set on this function in a nominally label-free program to help identify any bugs in the instrumentation pass causing labels to be introduced. Reviewers: eugenis CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D1405 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188472 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: Instrumentation for memset.Peter Collingbourne2013-08-14
| | | | | | Differential Revision: http://llvm-reviews.chandlerc.com/D1395 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188412 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: greylist is now ABI list.Peter Collingbourne2013-08-14
| | | | | | | | | | | | | | | | | | | | | | | | | This replaces the old incomplete greylist functionality with an ABI list, which can provide more detailed information about the ABI and semantics of specific functions. The pass treats every function in the "uninstrumented" category in the ABI list file as conforming to the "native" (i.e. unsanitized) ABI. Unless the ABI list contains additional categories for those functions, a call to one of those functions will produce a warning message, as the labelling behaviour of the function is unknown. The other supported categories are "functional", "discard" and "custom". - "discard" -- This function does not write to (user-accessible) memory, and its return value is unlabelled. - "functional" -- This function does not write to (user-accessible) memory, and the label of its return value is the union of the label of its arguments. - "custom" -- Instead of calling the function, a custom wrapper __dfsw_F is called, where F is the name of the function. This function may wrap the original function or provide its own implementation. Differential Revision: http://llvm-reviews.chandlerc.com/D1345 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188402 91177308-0d34-0410-b5e6-96231b3b80d8
* dfsan: fix lint warningsDmitry Vyukov2013-08-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188293 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: fix a use-after-free. Spotted by libgmalloc.Peter Collingbourne2013-08-12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188216 91177308-0d34-0410-b5e6-96231b3b80d8
* Add SpecialCaseList::createOrDie() factory and use it in sanitizer passesAlexey Samsonov2013-08-12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188169 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer: Remove unreachable BBs so IR continues to verifyPeter Collingbourne2013-08-09
| | | | | | | | under the args ABI. Differential Revision: http://llvm-reviews.chandlerc.com/D1316 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188113 91177308-0d34-0410-b5e6-96231b3b80d8
* Mark obviously const methods. Also use reference for parameters when possible.Jakub Staszak2013-08-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188103 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix ARM build.Peter Collingbourne2013-08-08
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187944 91177308-0d34-0410-b5e6-96231b3b80d8
* DataFlowSanitizer; LLVM changes.Peter Collingbourne2013-08-07
| | | | | | | | | | | | | DataFlowSanitizer is a generalised dynamic data flow analysis. Unlike other Sanitizer tools, this tool is not designed to detect a specific class of bugs on its own. Instead, it provides a generic dynamic data flow analysis framework to be used by clients to help detect application-specific issues within their own code. Differential Revision: http://llvm-reviews.chandlerc.com/D965 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187923 91177308-0d34-0410-b5e6-96231b3b80d8
* Change the linkage of these global values to 'internal'.Bill Wendling2013-08-06
| | | | | | | | | | | | | | | | | | | The globals being generated here were given the 'private' linkage type. However, this caused them to end up in different sections with the wrong prefix. E.g., they would be in the __TEXT,__const section with an 'L' prefix instead of an 'l' (lowercase ell) prefix. The problem is that the linker will eat a literal label with 'L'. If a weak symbol is then placed into the __TEXT,__const section near that literal, then it cannot distinguish between the literal and the weak symbol. Part of the problems here was introduced because the address sanitizer converted some C strings into constant initializers with trailing nuls. (Thus putting them in the __const section with the wrong prefix.) The others were variables that the address sanitizer created but simply had the wrong linkage type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187827 91177308-0d34-0410-b5e6-96231b3b80d8
* 80-colsAlexey Samsonov2013-08-05
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187725 91177308-0d34-0410-b5e6-96231b3b80d8
* [PowerPC] Support powerpc64le as a syntax-checking target.Bill Schmidt2013-07-26
| | | | | | | | | | | | | | | | | | | | | | | | This patch provides basic support for powerpc64le as an LLVM target. However, use of this target will not actually generate little-endian code. Instead, use of the target will cause the correct little-endian built-in defines to be generated, so that code that tests for __LITTLE_ENDIAN__, for example, will be correctly parsed for syntax-only testing. Code generation will otherwise be the same as powerpc64 (big-endian), for now. The patch leaves open the possibility of creating a little-endian PowerPC64 back end, but there is no immediate intent to create such a thing. The LLVM portions of this patch simply add ppc64le coverage everywhere that ppc64 coverage currently exists. There is nothing of any import worth testing until such time as little-endian code generation is implemented. In the corresponding Clang patch, there is a new test case variant to ensure that correct built-in defines for little-endian code are generated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187179 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove DIBuilder cache of variable TheCU and change the fewEric Christopher2013-07-19
| | | | | | | uses that wanted it. Also change the interface for createCompileUnit to compensate. Fix comments that refer to TheCU as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186637 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Remove DIBuilder cache of variable TheCU and change the few"Eric Christopher2013-07-18
| | | | | | This reverts commit r186599 as I didn't want to commit this yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186601 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove DIBuilder cache of variable TheCU and change the fewEric Christopher2013-07-18
| | | | | | | uses that wanted it. Also change the interface for createCompileUnit to compensate. Fix comments that refer to TheCU as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186599 91177308-0d34-0410-b5e6-96231b3b80d8
* Add comparison operators for DIDescriptors to fix c++98 falloutEric Christopher2013-07-17
| | | | | | | | of operator bool change. Also convert a variable in DebugIR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186544 91177308-0d34-0410-b5e6-96231b3b80d8
* Mark a method 'const' and another 'static'.Craig Topper2013-07-17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186485 91177308-0d34-0410-b5e6-96231b3b80d8
* Make a few more static string pointers constant.Craig Topper2013-07-17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186484 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a wrapper for open.Rafael Espindola2013-07-16
| | | | | | | This centralizes the handling of O_BINARY and opens the way for hiding more differences (like how open behaves with directories). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186447 91177308-0d34-0410-b5e6-96231b3b80d8
* Add 'const' qualifiers to static const char* variables.Craig Topper2013-07-16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186371 91177308-0d34-0410-b5e6-96231b3b80d8
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