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2018-05-18[sanitizer] Trivial portion of the port to Myriad RTEMSWalter Lee
This commit contains the trivial portion of the port of ASan to Myriad RTEMS. - Whitelist platform in sanitizer_platform.h, ubsan_platform.h - Turn off general interception - Use memset for FastPoisonShadow - Define interception wrappers - Set errno symbol correctly - Enable ASAN_LOW_MEMORY - Enable preinit array - Disable slow unwinding - Use fuchsia offline symbolizer - Disable common code for: InitializeShadowMemory, CreateMainThread, AsanThread::ThreadStart, StartReportDeadlySignal, MaybeReportNonExecRegion. Differential Revision: https://reviews.llvm.org/D46454 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@332681 91177308-0d34-0410-b5e6-96231b3b80d8
2018-05-16[asan] Add a magic shadow value for shadw gapWalter Lee
This gives us something to insert into the shadow gap for systems that don't have memory protection turned on there (i.e. on Myriad). Differential Revision: https://reviews.llvm.org/D46457 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@332557 91177308-0d34-0410-b5e6-96231b3b80d8
2017-08-09[asan] Refactor thread creation bookkeepingVitaly Buka
Summary: This is a pure refactoring change. It paves the way for OS-specific implementations, such as Fuchsia's, that can do most of the per-thread bookkeeping work in the creator thread before the new thread actually starts. This model is simpler and cleaner, avoiding some race issues that the interceptor code for thread creation has to do for the existing OS-specific implementations. Submitted on behalf of Roland McGrath. Reviewers: vitalybuka, alekseyshl, kcc Reviewed By: alekseyshl Subscribers: phosek, filcab, llvm-commits, kubamracek Tags: #sanitizers Differential Revision: https://reviews.llvm.org/D36385 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@310432 91177308-0d34-0410-b5e6-96231b3b80d8
2017-07-31[asan] Move shadow memory setup into its own fileVitaly Buka
Submitted on behalf of Roland McGrath. Reviewers: vitalybuka, alekseyshl, kcc Subscribers: kubamracek, mgorny, phosek, filcab, llvm-commits Tags: #sanitizers Differential Revision: https://reviews.llvm.org/D36037 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@309542 91177308-0d34-0410-b5e6-96231b3b80d8
2017-07-12[asan] For iOS/AArch64, if the dynamic shadow doesn't fit, restrict the VM spaceKuba Mracek
On iOS/AArch64, the address space is very limited and has a dynamic maximum address based on the configuration of the device. We're already using a dynamic shadow, and we find a large-enough "gap" in the VM where we place the shadow memory. In some cases and some device configuration, we might not be able to find a large-enough gap: E.g. if the main executable is linked against a large number of libraries that are not part of the system, these libraries can fragment the address space, and this happens before ASan starts initializing. This patch has a solution, where we have a "backup plan" when we cannot find a large-enough gap: We will restrict the address space (via MmapFixedNoAccess) to a limit, for which the shadow limit will fit. Differential Revision: https://reviews.llvm.org/D35098 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307865 91177308-0d34-0410-b5e6-96231b3b80d8
2017-02-21[compiler-rt][asan] Add support for desallocation of unhandled pointersEtienne Bergeron
Summary: On windows 10, the ucrt DLL is performing allocations before the function hooking and there are multiple allocations not handled by Asan. When a free occur at the end of the process, asan is reporting desallocations not malloc-ed. Reviewers: rnk, kcc Reviewed By: rnk, kcc Subscribers: kcc, llvm-commits, kubamracek, chrisha, dberris Differential Revision: https://reviews.llvm.org/D25946 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@295730 91177308-0d34-0410-b5e6-96231b3b80d8
2017-02-02[sanitizer] Move DescribeSignalOrException to sanitizer_common.Marcos Pividori
Differential Revision: https://reviews.llvm.org/D29459 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@293956 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-27[compiler-rt] Move logic which replace memcpy interceptor with memmove from ↵Vitaly Buka
asan to sanitizer_common. Reviewers: eugenis Subscribers: kubabrecka, dberris, llvm-commits Differential Revision: https://reviews.llvm.org/D28074 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@290626 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-21Reduce the size of quarantine cache in ASAN_LOW_MEMORY configuration.Evgeniy Stepanov
Summary: Experiments show that on Android the current values result in too much of the memory consumption for all quarantined chunks. Reviewers: kcc, eugenis Subscribers: mgorny, danalbert, srhines, llvm-commits, kubabrecka Patch by Aleksey Shlyapnikov. Differential Revision: https://reviews.llvm.org/D27873 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@290218 91177308-0d34-0410-b5e6-96231b3b80d8
2016-09-08[asan] Reify ErrorDeadlySignalFilipe Cabecinhas
Summary: Keep reifying other errors. Reviewers: kcc, samsonov Subscribers: llvm-commits, kubabrecka Differential Revision: https://reviews.llvm.org/D23873 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@280930 91177308-0d34-0410-b5e6-96231b3b80d8
2016-08-25[asan] remove unused kAsanHeapRightRedzoneMagic (NFC); part 2 (sorry)Kostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@279790 91177308-0d34-0410-b5e6-96231b3b80d8
2016-08-17[asan] Remove "Stack partial redzone" from reportVitaly Buka
Summary: This value is never used. Reviewers: kcc, eugenis Subscribers: llvm-commits, kubabrecka Differential Revision: https://reviews.llvm.org/D23631 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@279010 91177308-0d34-0410-b5e6-96231b3b80d8
2016-07-11[asan] Add exception handler to map memory on demand on Win64.Etienne Bergeron
Memory will be committed on demand when exception happens while accessing shadow memeory region. Patch by: Wei Wang Differential Revision: http://reviews.llvm.org/D21942 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@275107 91177308-0d34-0410-b5e6-96231b3b80d8
2016-06-16[sanitizers] introduce yet another API function: ↵Kostya Serebryany
__sanitizer_install_malloc_and_free_hooks git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@272943 91177308-0d34-0410-b5e6-96231b3b80d8
2016-06-06This patch attempts to primitive support for Win64 asanEtienne Bergeron
Some known issues are: When "head" include instructions that involve branching, the "cut and paste" approach may break down in a way that function interception still work but calling back the original function does not work. The jmp [rip -8] saves some bytes in the "head" but finding the safe zone of 0xCC is not implemented yet. So it may stomp on preceding codes. The shadow offset is not working yet on Win64. More complexity maybe involved since there are some differences regarding virtual address space between Window 8 and Windows 8.1/10. Patch by: Wang Wei Differential Revision: http://reviews.llvm.org/D20884 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@271915 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-28[asan] Add runtime support for __asan_(un)register_image_globalsRyan Govostes
This change introduces routines that register and unregister all instrumented globals in a loaded executable image. These routines are only implemented on Darwin, where globals metadata is expected to be placed in the __DATA,__asan_globals section. Review: http://reviews.llvm.org/D16841 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@264644 91177308-0d34-0410-b5e6-96231b3b80d8
2016-02-02[asan] Add iOS support.Anna Zaks
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@259451 91177308-0d34-0410-b5e6-96231b3b80d8
2015-12-03[tsan] Use re-exec method to enable interceptors on older versions of OS XKuba Brecka
In AddressSanitizer, we have the MaybeReexec method to detect when we're running without DYLD_INSERT_LIBRARIES (in which case interceptors don't work) and re-execute with the environment variable set. On OS X 10.11+, this is no longer necessary, but to have ThreadSanitizer supported on older versions of OS X, let's use the same method as well. This patch moves the implementation from `asan/` into `sanitizer_common/`. Differential Revision: http://reviews.llvm.org/D15123 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@254600 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-21[Sanitizers] Unify the semantics and usage of "exitcode" runtime flag across ↵Alexey Samsonov
all sanitizers. Summary: Merge "exitcode" flag from ASan, LSan, TSan and "exit_code" from MSan into one entity. Additionally, make sure sanitizer_common now uses the value of common_flags()->exitcode when dying on error, so that this flag will automatically work for other sanitizers (UBSan and DFSan) as well. User-visible changes: * "exit_code" MSan runtime flag is now deprecated. If explicitly specified, this flag will take precedence over "exitcode". The users are encouraged to migrate to the new version. * __asan_set_error_exit_code() and __msan_set_exit_code() functions are removed. With few exceptions, we don't support changing runtime flags during program execution - we can't make them thread-safe. The users should use __sanitizer_set_death_callback() that would call _exit() with proper exit code instead. * Plugin tools (LSan and UBSan) now inherit the exit code of the parent tool. In particular, this means that ASan would now crash the program with exit code "1" instead of "23" if it detects leaks. Reviewers: kcc, eugenis Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D12120 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@245734 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-06[sanitizer] 2-nd attempt. Add the flag handle_sigfpe that is default true to ↵Kostya Serebryany
handle SIGFPE crashes same as SIGSEV crashes, patch by Karl Skomski. This time the test is enabled only on x86-64 (it broke on ARM) git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@244234 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-06Revert "[sanitizer] Add the flag handle_sigfpe that is default true to ↵Renato Golin
handle SIGFPE crashes same as SIGSEV crashes, patch by Karl Skomski" This reverts commit r244136, it was breaking the ARM bots for too long. We should investigate it offline. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@244210 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-05[sanitizer] Add the flag handle_sigfpe that is default true to handle SIGFPE ↵Kostya Serebryany
crashes same as SIGSEV crashes, patch by Karl Skomski git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@244136 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-21[asan] Remove AsanPlatformThreadInitReid Kleckner
Since the CoreFoundation allocator replacement was moved in r173134, all implementations of this function have been empty. Reviewers: samsonov Differential Revision: http://reviews.llvm.org/D11375 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@242811 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-29Add descriptive names to sanitizer entries in /proc/self/maps. Helps debugging.Evgeniy Stepanov
This is done by creating a named shared memory region, unlinking it and setting up a private (i.e. copy-on-write) mapping of that instead of a regular anonymous mapping. I've experimented with regular (sparse) files, but they can not be scaled to the size of MSan shadow mapping, at least on Linux/X86_64 and ext3 fs. Controlled by a common flag, decorate_proc_maps, disabled by default. This patch has a few shortcomings: * not all mappings are annotated, especially in TSan. * our handling of memset() of shadow via mmap() puts small anonymous mappings inside larger named mappings, which looks ugly and can, in theory, hit the mapping number limit. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@238621 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-02asan: fix signal handling during stoptheworldDmitry Vyukov
The problem is that without SA_RESTORER flag, kernel ignores the handler. So tracer actually did not setup any handler. Add SA_RESTORER flag when setting up handlers. Add a test that causes SIGSEGV in stoptheworld callback. Move SignalContext from asan to sanitizer_common to print better diagnostics about signal in the tracer thread. http://reviews.llvm.org/D8005 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@230978 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-10Fix ASan's Noinst unit testsKuba Brecka
We currently skip all "Noinst" unit tests on OS X, which was probably caused when we removed the "allow_reexec" flag. The MaybeReexec function fails to re-execute when the runtime is linked statically, because there is no dylib to use. This patch adds an explicit DisableReexec function that is used from asan_noinst_test.cc and the runtime then doesn't try to re-execute. Reviewed at http://reviews.llvm.org/D7493 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@228740 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-21[asan] use MADV_NOHUGEPAGE for shadow to reduce the actual memory usageKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@226636 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-09Remove AsanInterceptsSignal in favor of (equivalent) IsDeadlySignal.Alexey Samsonov
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@225556 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-17[ASan] Move flag parsing logic to asan_flags.cc. NFC.Alexey Samsonov
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@224450 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-25[Asan] Pack signal context into a structureViktor Kutuzov
Differential Revision: http://reviews.llvm.org/D6148 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@222756 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-21[asan] Runtime support for asan-instrument-allocas which enables ↵Yury Gribov
instrumentation of variable-sized dynamic allocas. Patch by Max Ostapenko. Reviewed at http://reviews.llvm.org/D6055 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@222520 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-17[asan] the run-time part of intra-object-overflow detector ↵Kostya Serebryany
(-fsanitize-address-field-padding=1). Note that all of this is still experimental; don't use unless you are brave. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@220013 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-12[Sanitizer] Kill deprecated allocator interfaces in ASan, MSan and TSan in ↵Alexey Samsonov
favor of a unified interface in <sanitizer/allocator_interface.h>. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@215469 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-04[asan] introduce __asan_poison_cxx_array_cookie. This is asan-rt part of ↵Kostya Serebryany
PR19838 (Left OOB accesses on new[]-allocated arrays with array cookies are not detected). No tests yet. They will follow once I commit the clang part. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@214711 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-25[Sanitizer] Introduce SANITIZER_CAN_USE_PREINIT_ARRAY definition and use it ↵Alexey Samsonov
across sanitizers. Get rid of ASAN_USE_PREINIT_ARRAY and LSAN_USE_PREINIT_ARRAY - just always use .preinit_array if it's available. This mode seems stable enough, and we've been relying on default values of these macro for a long time. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@213980 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-07Generalize sanitizer allocator public interface.Alexey Samsonov
Introduce new public header <sanitizer/allocator_interface.h> and a set of functions __sanitizer_get_ownership(), __sanitizer_malloc_hook() etc. that will eventually replace their tool-specific equivalents (__asan_get_ownership(), __msan_get_ownership() etc.). Tool-specific functions are now deprecated and implemented as stubs redirecting to __sanitizer_ versions (which are implemented differently in each tool). Replace all uses of __xsan_ versions with __sanitizer_ versions in unit and lit tests. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@212469 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06[asan] Make ReplaceSystemMalloc optional on Android.Evgeniy Stepanov
Don't fail if __libc_malloc_dispatch is missing; continue running with normal linux interceptors instead. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@210322 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-15Fix typosAlp Toker
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@208841 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-12[ASan] Split static ASan runtime in two parts: asan and asan_cxx.Alexey Samsonov
asan_cxx containts replacements for new/delete operators, and should only be linked in C++ mode. We plan to start building this part with exception support to make new more standard-compliant. See https://code.google.com/p/address-sanitizer/issues/detail?id=295 for more details. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@208609 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-12[asan] define ASAN_DYNAMIC=1 if PIC is definedKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@208530 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-01[ASan] Optional support for dynamic ASan runtime on Linux.Alexey Samsonov
Based on http://llvm-reviews.chandlerc.com/D3042 by Yuri Gribov! git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205308 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-31[asan] Read extra flags from a system property on activation on Android.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@200550 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-31[ASan] Move the SIGSEGV/SIGBUS handling to sanitizer_commonAlexander Potapenko
This change is a part of refactoring intended to have common signal handling behavior in all tools. This particular CL moves InstallSignalHandlers() into sanitizer_common (making it InstallDeadlySignalHandlers()), but doesn't enable default signal handlers for any tool other than ASan. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@200542 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-28[ASan] Move the sigaltstack() bits to sanitizer_common.Alexander Potapenko
This change is a part of refactoring intended to have common signal handling behavior in all tools. Note that this particular change doesn't enable use_sigaltstack support in every tool. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@200310 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-28[ASan] Move the signal handling-related flags to sanitizer_common.Alexander Potapenko
This change is a part of refactoring intended to have common signal handling behavior in all tools. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@200295 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-16[asan] Implement delayed activation of AddressSanitizerEvgeniy Stepanov
This change adds ASAN_OPTIONS=start_deactivated=1 flag. When present, ASan will start in "deactivated" mode, with no heap poisoning, no quarantine, no stack trace gathering, and minimal redzones. All this features come back when __asan_init is called for the constructor of an instrumented library. The primary use case for this feature is Android. Code itself is not Android-specific, and this patch includes a Linux test for it. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@199377 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-16[asan] Nuke ASAN_FLEXIBLE_MAPPING_AND_OFFSET.Evgeniy Stepanov
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@199370 91177308-0d34-0410-b5e6-96231b3b80d8
2013-11-19[asan] new shadow poison magic for contiguous-container-buffer-overflow, ↵Kostya Serebryany
addressed Alexey Samsonov's comments for r195011 git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@195117 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-14[asan] Improve thread lifetime tracking on POSIX systems.Sergey Matveev
Call AsanThread::Destroy() from a late-running TSD destructor. Previously we called it before any user-registered TSD destructors, which caused false positives in LeakSanitizer. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192585 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-24Disable init-order checking before destructors are run.Alexey Samsonov
We don't want to report initialization-order bugs when a destructor of a global variable accesses dynamically initialized global from another (not necessarily initialized) module. We do this by intercepting __cxa_atexit and registrering our own callback that unpoisons shadow for all dynamically initialized global variables. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182637 91177308-0d34-0410-b5e6-96231b3b80d8
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