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* Merge commit 'b3201c5cf1e183d840f7c99ff779d57f1549d8e5' into merge_20130226Stephen Hines2013-03-056-21/+53
|\ | | | | | | | | | | | | | | Conflicts: include/llvm/Support/ELF.h lib/Support/DeltaAlgorithm.cpp Change-Id: I24a4fbce62eb39d924efee3c687b55e1e17b30cd
| * Rewrite comments.Dan Gohman2013-02-201-3/+5
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175651 91177308-0d34-0410-b5e6-96231b3b80d8
| * Add comment in Memory.inc explaining r175646.Krzysztof Parzyszek2013-02-201-0/+7
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175650 91177308-0d34-0410-b5e6-96231b3b80d8
| * SIGQUIT is a "kill" signal, rather than an "int" signal, in this context.Dan Gohman2013-02-201-2/+2
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175648 91177308-0d34-0410-b5e6-96231b3b80d8
| * On PowerPC, the cache-flush instructions dcbf and icbi are treated asKrzysztof Parzyszek2013-02-201-0/+4
| | | | | | | | | | | | | | loads. On FreeBSD, add PROT_READ page protection flag before flushing cache. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175646 91177308-0d34-0410-b5e6-96231b3b80d8
| * Fix initialization-order bug in llvm::Support::TimeValue. TimeValue::now() ↵Alexey Samsonov2013-02-191-1/+2
| | | | | | | | | | | | is explicitly called during module initialization of lib/Support/Process.cpp. It reads the field of global object PosixZeroTime, which is not guaranteed to be initialized at this point. Found by AddressSanitizer with -fsanitize=init-order option. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175509 91177308-0d34-0410-b5e6-96231b3b80d8
| * Workaround an MSan false positive.Evgeniy Stepanov2013-02-141-0/+2
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175156 91177308-0d34-0410-b5e6-96231b3b80d8
| * More MSan/ASan annotations.Evgeniy Stepanov2013-02-041-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change lets us bootstrap LLVM/Clang under ASan and MSan. It contains fixes for 2 issues: - X86JIT reads return address from stack, which MSan does not know is initialized. - bugpoint tests run binaries with RLIMIT_AS. This does not work with certain Sanitizers. We are no longer including config.h in Compiler.h with this change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174306 91177308-0d34-0410-b5e6-96231b3b80d8
| * Fix gcc/printf/ISO C++ warningEdwin Vane2013-01-281-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the use of the 't' length modifier to avoid a gcc warning. Based on usage, 32 bits of precision is good enough for printing a stack offset for a stack trace. 't' length modifier isn't in C++03 but it *is* in C++11. Added a FIXME to reintroduce once LLVM makes the switch to C++11. Reviewer: gribozavr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173711 91177308-0d34-0410-b5e6-96231b3b80d8
| * Fix a race condition in llvm::sys::path::unique_file: when we end upDouglas Gregor2013-01-101-4/+7
| | | | | | | | | | | | | | | | failing to create the unique file because the path doesn't exist, don't fail if someone else manages to create the path before we do. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172032 91177308-0d34-0410-b5e6-96231b3b80d8
| * Move the internal PrintStackTrace function that is used for ↵Argyrios Kyrtzidis2013-01-091-11/+15
| | | | | | | | | | | | | | | | llvm::sys::PrintStackTraceOnErrorSignal(), into a new function llvm::sys::PrintStackTrace, so that it's available to clients for logging purposes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171989 91177308-0d34-0410-b5e6-96231b3b80d8
* | Merge remote-tracking branch 'upstream/master' into merge-llvmStephen Hines2013-01-217-113/+301
|\ \ | |/ | | | | | | | | | | | | | | | | | | | | Conflicts: lib/CodeGen/AsmPrinter/AsmPrinter.cpp lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp lib/MC/MCAssembler.cpp lib/Support/Atomic.cpp lib/Support/Memory.cpp lib/Target/ARM/ARMJITInfo.cpp Change-Id: Ib339baf88df5b04870c8df1bedcfe1f877ccab8d
| * Eric thought that Darwin was right to use -1 consistently rather thanChandler Carruth2013-01-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | leaving this undefined, and despite the sentence in the standard that seems to require it, I'll cede the point and assume its a bug in the wording. Other parts of POSIX regularly allow for things to be -1 instead of undefined, this should too. Makes things more consistent too. This should have to real impact for folks though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171574 91177308-0d34-0410-b5e6-96231b3b80d8
| * Try to suppress the use of clock_gettime on Darwin which apparantlyChandler Carruth2013-01-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | defines _POSIX_CPUTIME but doesn't support the clock_* functions. I don't test the value of _POSIX_CPUTIME because the spec merely says that if it is defined, the CPU-specific timers are available, whereas it says that _POSIX_TIMERS must be defined and defined to a value greater than zero. However, this may not work, as the POSIX spec clearly states: "If the symbolic constant _POSIX_CPUTIME is defined, then the symbolic constant _POSIX_TIMERS shall also be defined by the implementation to have the value 200112L." If this doesn't work, I'll add more hacks for Darwin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171565 91177308-0d34-0410-b5e6-96231b3b80d8
| * Add time getters to the process interface for requesting the elapsedChandler Carruth2013-01-041-22/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | wall time, user time, and system time since a process started. For walltime, we currently use TimeValue's interface and a global initializer to compute a close approximation of total process runtime. For user time, this adds support for an somewhat more precise timing mechanism -- clock_gettime with the CLOCK_PROCESS_CPUTIME_ID clock selected. For system time, we have to do a full getrusage call to extract the system time from the OS. This is expensive but unavoidable. In passing, clean up the implementation of the old APIs and fix some latent bugs in the Windows code. This might have manifested on Windows ARM systems or other systems with strange 64-bit integer behavior. The old API for this both user time and system time simultaneously from a single getrusage call. While this results in fewer system calls, it also results in a lower precision user time and if only user time is desired, it introduces a higher overhead. It may be worthwhile to switch some of the pass timers to not track system time and directly track user and wall time. The old API also tracked walltime in a confusing way -- it just set it to the current walltime rather than providing any measure of wall time since the process started the way buth user and system time are tracked. The new API is more consistent here. The plan is to eventually implement these methods for a *child* process by using the wait3(2) system call to populate an rusage struct representing the whole subprocess execution. That way, after waiting on a child process its stats will become accurate and cheap to query. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171551 91177308-0d34-0410-b5e6-96231b3b80d8
| * Remove an unused method on Program.Chandler Carruth2012-12-311-18/+0
| | | | | | | | | | | | | | I'm simplifying this interface as much as I can before merging it with the new process interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171334 91177308-0d34-0410-b5e6-96231b3b80d8
| * Remove an unused method on the Program class.Chandler Carruth2012-12-311-5/+0
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171332 91177308-0d34-0410-b5e6-96231b3b80d8
| * Go ahead and get rid of the old page size interface and convert all theChandler Carruth2012-12-312-9/+9
| | | | | | | | | | | | | | users over to the new one. No sense maintaining this "compatibility" layer it seems. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171331 91177308-0d34-0410-b5e6-96231b3b80d8
| * Flesh out a page size accessor in the new API.Chandler Carruth2012-12-311-4/+7
| | | | | | | | | | | | | | | | Implement the old API in terms of the new one. This simplifies the implementation on Windows which can now re-use the self_process's once initialization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171330 91177308-0d34-0410-b5e6-96231b3b80d8
| * Remove an unused function in the old Process interface.Chandler Carruth2012-12-311-20/+0
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171327 91177308-0d34-0410-b5e6-96231b3b80d8
| * Switch this code to a more idiomatic double using namespace directive.Chandler Carruth2012-12-311-1/+1
| | | | | | | | | | | | | | | | Fix a truly odd namespace qualifier that was flat out wrong in the process. The fully qualified namespace would have been llvm::sys::TimeValue, llvm::TimeValue makes no sense. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171292 91177308-0d34-0410-b5e6-96231b3b80d8
| * Begin sketching out the process interface.Chandler Carruth2012-12-311-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The coding style used here is not LLVM's style because this is modeled after a Boost interface and thus done in the style of a candidate C++ standard library interface. I'll probably end up proposing it as a standard C++ library if it proves to be reasonably portable and useful. This is just the most basic parts of the interface -- getting the process ID out of it. However, it helps sketch out some of the boiler plate such as the base class, derived class, shared code, and static factory function. It also introduces a unittest so that I can incrementally ensure this stuff works. However, I've not even compiled this code for Windows yet. I'll try to fix any Windows fallout from the bots, and if I can't fix it I'll revert and get someone on Windows to help out. There isn't a lot more that is mandatory, so soon I'll switch to just stubbing out the Windows side and get Michael Spencer to help with implementation as he can test it directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171289 91177308-0d34-0410-b5e6-96231b3b80d8
| * Sort includes for all of the .h files under the 'lib' tree. These wereChandler Carruth2012-12-041-3/+3
| | | | | | | | | | | | | | | | | | | | missed in the first pass because the script didn't yet handle include guards. Note that the script is now able to handle all of these headers without manual edits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169224 91177308-0d34-0410-b5e6-96231b3b80d8
| * Use the new script to sort the includes of every file under lib.Chandler Carruth2012-12-032-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
| * Switch LLVM_USE_RVALUE_REFERENCES to LLVM_HAS_RVALUE_REFERENCES.Chandler Carruth2012-11-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Rationale: 1) This was the name in the comment block. ;] 2) It matches Clang's __has_feature naming convention. 3) It matches other compiler-feature-test conventions. Sorry for the noise. =] I've also switch the comment block to use a \brief tag and not duplicate the name. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168996 91177308-0d34-0410-b5e6-96231b3b80d8
| * PathV2: Fix a possible infinite loop.Daniel Dunbar2012-11-151-3/+4
| | | | | | | | | | | | | | | | | | | | - The code could infinite loop trying to create unique files, if the directory containing the unique file exists, but open() calls on non-existent files in the path return ENOENT. This is true on the /dev/fd filesystem, for example. - Will add a clang side test case for this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168081 91177308-0d34-0410-b5e6-96231b3b80d8
| * Support: Don't remove special files on signals.Daniel Dunbar2012-10-171-9/+21
| | | | | | | | | | | | | | - Similar to Path::eraseFromDisk(), we don't want LLVM to remove things like /dev/null, even if it has the permission. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166105 91177308-0d34-0410-b5e6-96231b3b80d8
| * Make backtraces work again with both the configure and cmake build.Benjamin Kramer2012-09-281-1/+1
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164817 91177308-0d34-0410-b5e6-96231b3b80d8
| * The assumption that /proc/self/exe always exists is incorrect.Sylvestre Ledru2012-09-261-4/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | For example, under a Linux chroot, /proc/ might not be mounted. Therefor, we test if this file exist. If it is the case, use it (the current behavior). Otherwise, we fall back to the detection used by *BSD. The issue has been reported initially on the Debian bug tracker: http://bugs.debian.org/674588 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164676 91177308-0d34-0410-b5e6-96231b3b80d8
| * Add an --enable-backtraces option to configure to determineEric Christopher2012-09-211-1/+1
| | | | | | | | | | | | | | | | | | whether or not we want to print out backtrace information. Useful for libraries that don't need backtrace information on a crash. rdar://11844710 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164426 91177308-0d34-0410-b5e6-96231b3b80d8
| * This patch adds memory support functions which will later be used to ↵Andrew Kaylor2012-09-191-12/+186
| | | | | | | | | | | | implement section-specific protection handling in MCJIT. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164249 91177308-0d34-0410-b5e6-96231b3b80d8
| * Add support for finding cacheflush on OpenBSD/mips64 platforms.Chandler Carruth2012-09-111-0/+8
| | | | | | | | | | | | Patch by Brad Smith! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163584 91177308-0d34-0410-b5e6-96231b3b80d8
* | Merge branch 'upstream' into merge-2012_09_10Stephen Hines2012-09-101-3/+3
|\ \ | |/ | | | | | | | | | | | | | | Conflicts: lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp lib/Support/DynamicLibrary.cpp lib/Support/LockFileManager.cpp Change-Id: I91e94c3a7a76e19c688307c5a480a640a3bd2b7e
| * Whitespace.NAKAMURA Takumi2012-09-061-2/+2
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163289 91177308-0d34-0410-b5e6-96231b3b80d8
| * Unix/Signals.inc: Fix a typo. Thanks to Dani Berg!NAKAMURA Takumi2012-09-061-1/+1
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163288 91177308-0d34-0410-b5e6-96231b3b80d8
* | Merge branch 'upstream' into merge_2Stephen Hines2012-08-233-5/+124
|\ \ | |/ | | | | | | | | | | Conflicts: lib/Target/ARM/ARMCodeEmitter.cpp Change-Id: I6702d340c733e9721499b5d85b13b96ad9c14eb5
| * Properly test the LLVM_USE_RVALUE_REFERENCES macro.Michael J. Spencer2012-08-151-1/+1
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161978 91177308-0d34-0410-b5e6-96231b3b80d8
| * [PathV2] Add mapped_file_region. Implementation for Windows and POSIX.Michael J. Spencer2012-08-151-0/+112
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161976 91177308-0d34-0410-b5e6-96231b3b80d8
| * stdcxx's cstdio doesn't include stdio.h, but the code using PathV2.incJoerg Sonnenberger2012-08-101-0/+6
| | | | | | | | | | | | | | includes both. Deal with feof and ferror potentially being macros. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161658 91177308-0d34-0410-b5e6-96231b3b80d8
| * Add support for the OpenBSD for Bitrig.Eric Christopher2012-08-062-5/+6
| | | | | | | | | | | | Patch by David Hill. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161344 91177308-0d34-0410-b5e6-96231b3b80d8
* | Merge with LLVM upstream r160668 (Jul 24th 2012)Shih-wei Liao2012-08-035-64/+173
|\ \ | |/ | | | | | | | | | | | | | | | | Conflicts: include/llvm/Support/ELF.h lib/CodeGen/AsmPrinter/AsmPrinter.cpp lib/Support/Memory.cpp lib/Transforms/Instrumentation/AddressSanitizer.cpp Change-Id: Iddd658cf2eadc7165b2805b446d31af2c5c9917f
| * Process: Add sys::Process::FileDescriptorHasColors().Daniel Dunbar2012-07-201-6/+8
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160557 91177308-0d34-0410-b5e6-96231b3b80d8
| * Fixed few warnings.Galina Kistanova2012-07-121-1/+2
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160142 91177308-0d34-0410-b5e6-96231b3b80d8
| * Add permissions(), map_file_pages(), and unmap_file_pages() to llvm::sys::fs ↵Nick Kledzik2012-06-201-7/+71
| | | | | | | | | | | | and add unit test. Unix is implemented. Windows side needs to be implemented. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158770 91177308-0d34-0410-b5e6-96231b3b80d8
| * Don't call 'FilesToRemove[0]' when the vector is empty, even to computeChandler Carruth2012-06-161-1/+1
| | | | | | | | | | | | | | the address of it. Found by a checking STL implementation used on a dragonegg builder. Sorry about this one. =/ git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158582 91177308-0d34-0410-b5e6-96231b3b80d8
| * Harden the Unix signals code to be more async signal safe.Chandler Carruth2012-06-161-9/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is likely only the tip of the ice berg, but this particular bug caused any double-free on a glibc system to turn into a deadlock! It is not generally safe to either allocate or release heap memory from within the signal handler. The 'pop_back()' in RemoveFilesToRemove was deleting memory and causing the deadlock. What's worse, eraseFromDisk in PathV1 has lots of allocation and deallocation paths. We even passed 'true' in a place that would have caused the *signal handler* to try to run the 'system' system call and shell out to 'rm -rf'. That was never going to work... This patch switches the file removal to use a vector of strings so that the exact text needed for the 'unlink' system call can be stored there. It switches the loop to be a boring indexed loop, and directly calls unlink without looking at the error. It also works quite hard to ensure that calling 'c_str()' is safe, by ensuring that the non-signal-handling code path that manipulates the vector always leaves it in a state where every element has already had 'c_str()' called at least once. I dunno exactly how overkill this is, but it fixes the deadlock-on-double free issue, and seems likely to prevent any other issues from sneaking up. Sorry for not having a test case, but I *really* don't know how to test signal handling code easily.... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158580 91177308-0d34-0410-b5e6-96231b3b80d8
| * Use access(2) instead of stat(2) to check if a file exists.Benjamin Kramer2012-06-021-2/+1
| | | | | | | | | | | | | | | | | | | | | | Apart from being slightly cheaper, this fixes a real bug that hits 32 bit linux systems. When passing a file larger than 2G to be linked (which isn't that uncommon with large projects such as WebKit), clang's driver checks if the file exists but the file size doesn't fit in an off_t and stat(2) fails with EOVERFLOW. Clang then says that the file doesn't exist instead of passing it to the linker. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157891 91177308-0d34-0410-b5e6-96231b3b80d8
| * Allow unique_file to take a mode for file permissions, but defaultEric Christopher2012-05-111-3/+4
| | | | | | | | | | | | | | | | to user only read/write. Part of rdar://11325849 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156591 91177308-0d34-0410-b5e6-96231b3b80d8
| * [Support] Fix sys::GetRandomNumber() to always use a high quality seed.Daniel Dunbar2012-05-081-5/+15
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156414 91177308-0d34-0410-b5e6-96231b3b80d8
| * Unix/Process.inc: Give more useful random seed to srand. Workaround for PR12743.NAKAMURA Takumi2012-05-061-1/+14
| | | | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156252 91177308-0d34-0410-b5e6-96231b3b80d8
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