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Matt Morehouse 846ec2c3cc [HWASan] Ensure RNG is initialized in GenerateRandomTag 
Fixes a CHECK-failure caused by glibc's pthread_getattr_np
implementation calling realloc.  Essentially, Thread::GenerateRandomTag
gets called during Thread::Init and before Thread::InitRandomState:

  HWAddressSanitizer: CHECK failed: hwasan_thread.cpp:134 "((random_buffer_)) != (0)" (0x0, 0x0) (tid=314)
    #0 0x55845475a662 in __hwasan::CheckUnwind()
    #1 0x558454778797 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long)
    #2 0x558454766461 in __hwasan::Thread::GenerateRandomTag(unsigned long)
    #3 0x55845475c58b in __hwasan::HwasanAllocate(__sanitizer::StackTrace*, unsigned long, unsigned long, bool)
    #4 0x55845475c80a in __hwasan::hwasan_realloc(void*, unsigned long, __sanitizer::StackTrace*)
    #5 0x5584547608aa in realloc
    #6 0x7f6f3a3d8c2c in pthread_getattr_np
    #7 0x5584547790dc in __sanitizer::GetThreadStackTopAndBottom(bool, unsigned long*, unsigned long*)
    #8 0x558454779651 in __sanitizer::GetThreadStackAndTls(bool, unsigned long*, unsigned long*, unsigned long*, unsigned long*)
    #9 0x558454761bca in __hwasan::Thread::InitStackAndTls(__hwasan::Thread::InitState const*)
    #10 0x558454761e5c in __hwasan::HwasanThreadList::CreateCurrentThread(__hwasan::Thread::InitState const*)
    #11 0x55845476184f in __hwasan_thread_enter
    #12 0x558454760def in HwasanThreadStartFunc(void*)
    #13 0x7f6f3a3d6fa2 in start_thread
    #14 0x7f6f3a15b4ce in __clone

Also reverts 7a3fb71c3c, as it's now
unneeded.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D113045
 		2021-11-09 07:01:55 -08:00
..
cmake [cmake] By default do not instrument compiler-rt if LLVM_BUILD_INSTRUMENTED_COVERAGE is ON 2021-11-09 10:59:25 +01:00
docs Prepare Compiler-RT for GnuInstallDirs, matching libcxx, document all 2021-07-13 15:21:41 +00:00
include [InstrProfData] Bump the raw profile version to 8 2021-10-05 09:57:56 -07:00
lib [HWASan] Ensure RNG is initialized in GenerateRandomTag 2021-11-09 07:01:55 -08:00
test [HWASan] Ensure RNG is initialized in GenerateRandomTag 2021-11-09 07:01:55 -08:00
tools [GWP-ASan] Add inbuilt options parser. 2021-01-15 12:57:05 -08:00
unittests [test] Fix asan dynamic unit tests with per-target runtime dirs 2021-10-14 16:47:25 -04:00
utils [compiler-rt] NFC: Fix trivial typo 2021-09-04 14:12:58 +05:30
www [compiler-rt] Document that builtins is known to work on OpenBSD. 2021-09-07 04:25:12 -04:00
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitignore
…
CMakeLists.txt [cmake] By default do not instrument compiler-rt if LLVM_BUILD_INSTRUMENTED_COVERAGE is ON 2021-11-09 10:59:25 +01:00
CODE_OWNERS.TXT
…
CREDITS.TXT
…
LICENSE.TXT
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README.txt
…

README.txt 

Compiler-RT
================================

This directory and its subdirectories contain source code for the compiler
support routines.

Compiler-RT is open source software. You may freely distribute it under the
terms of the license agreement found in LICENSE.txt.

================================