Currently we use __thread variable to store thread_local_dtors,
which makes tsan test fork_atexit.cc hang. The problem is as below:
The main thread creates a worker thread, the worker thread calls
pthread_exit() -> __cxa_thread_finalize() -> __emutls_get_address()
-> pthread_once(emutls_init) -> emutls_init().
Then the main thread calls fork(), the child process cals
exit() -> __cxa_thread_finalize() -> __emutls_get_address()
-> pthread_once(emutls_init).
So the child process is waiting for pthread_once(emutls_init)
to finish which will never occur.
It might be the test's fault because POSIX standard says if a
multi-threaded process calls fork(), the new process may only
execute async-signal-safe operations until exec functions are
called. And exit() is not async-signal-safe. But we can make
bionic more reliable by not using __thread in
__cxa_thread_finalize().
Bug: 25392375
Change-Id: Ife403dd7379dad8ddf1859c348c1c0adea07afb3
The anonymous namespace is introduced to
handle cases when linker can not find the
caller. This usually happens when caller
code was not loaded by dynamic linker;
for example mono-generated code.
Bug: http://b/25844435
Bug: http://b/22548808
Change-Id: I9e5b1d23c1c75bc78548d68e79216a6a943a33cf
Use blueprint's new anonymous embedded struct feature to move the arch
variant properties down a level, replacing arch.cortex_a9.srcs with
arch.arm.cortex_a9.srcs, while still supporting top-level properties
like arch.arm.srcs.
Change-Id: Ib41c80e3549440d5efdfd293a15cffa3f51a0fe4
The linker crashes if native library has invalid section
headers. This change adds boundary checks on target offsets
and generates dlerror instead of crash.
Bug: http://b/25800330
Change-Id: Ibe282029997302b9b557637c3aad064d7d0febc5
It is reported by tsan that funlockfile() can unlock an unlocked mutex.
It happens when printf() is called before fopen() or other stdio stuff.
As FLOCKFILE(fp) is called before __sinit(), _stdio_handles_locking is false,
and _FLOCK(fp) will not be locked. But then cantwrite(fp) in __vfprintf()
calls__sinit(), which makes _stdio_handles_locking become true, and
FUNLOCKFILE(fp) unlocks _FLOCK(fp).
Change _stdio_handles_locking into _caller_handles_locking,
so __sinit() won't change its value. Add test due to my previous fault.
Bug: 25392375
Change-Id: I483e3c3cdb28da65e62f1fd9615bf58c5403b4dd
* Many processes, including adbd, failed to start in mips/mips64
emulator when libc.so was compiled by clang.
BUG: 25291096
Change-Id: If3434ebdca4a3a6bf6102b120ee838a7ab66cd74
Currently is_private_anonymous is calculated as true if _either_
MAP_PRIVATE or MAP_ANONYMOUS is set, which is a mistake.
According to Documentation/vm/ksm.txt, "KSM only merges anonymous
(private) pages, never pagecache (file) pages". MAP_PRIVATE can
still be set on file cache pages so in order to not redundantly
set MADV_MERGEABLE on pages that are not fitted for it, both
MAP_PRIVATE and MAP_ANONYMOUS should be set.
Along with this fix, add an extra check that the mapped page is
not a stack page before setting MADV_MERGEABLE for it. Stack pages
change too quickly and always end up in KSM 'page_volatile' list.
Change-Id: If4954142852f17cc61f02985ea1cb625a7f3dec6
If tsan is used, the following callchain can happen:
__libc_preinit() -> __libc_init_globals() ->
__libc_init_vdso() -> strcmp() -> __tsan_init()
-> sysconf(_SC_PAGE_SIZE) -> getauxval().
But __libc_auxv is initialized in __libc_init_common(),
after __libc_init_globals(). One simple way to fix
this is to initialize __libc_auxv at __libc_init_globals().
Bug: 25392375
Change-Id: I3893b1f567d5f3b7a8c881c0c1b8234b06b7751b
This removes another way to obtain objects larger than PTRDIFF_MAX. The
only known remaining hole is now jemalloc's merging of virtual memory
spans.
Technically this could be wrapped in an __LP64__ ifndef since it can't
occur on 64-bit due to the 1:1 split. It doesn't really matter either
way.
Change-Id: Iab2af242b775bc98a59421994d87aca0433215bd
x86_64 32-bit or 64-bit relocations do not depend on ELF bit size, they
are 32-bit or 64-bit respectively.
Known compiler that emits such code is nacl-clang which emits
R_X86_64_PC32 which should write 32 bits but ended up writing 64 bits.
Change-Id: Ibb6b484c0fea6a7e291362148e8ac749d6674529
In order to run tsan unit tests, we need to support pthread spin APIs.
Bug: 18623621
Bug: 25392375
Change-Id: Icbb4a74e72e467824b3715982a01600031868e29
This fixes the bug with using the libraries loaded
prior to android_set_target_sdk_version call.
Bug: http://b/22548808
Change-Id: I3ca2d367b0fa930a437bbb65f780834803d2ef0a
If calling pthread_mutex_trylock from pthread_mutex_destroy, tsan
warns about an attempt to destroy a locked mutex.
Bug: 25392375
Change-Id: I5feee20e7a0d0915adad24da874ec1ccce241381
* Disable optimization only in gtest.h of atexit_test.c for arm/aarch64
to keep VTT for std::__1::basic_stringstream<char, std::__1::char_traits<char>,
std::__1::allocator<char> > to link with g++ compiled modules.
* bionic-unit-tests source files are not affected by clang x86_64 fp128 bug
so they can be compiled with clang.
BUG: 25643775
Change-Id: I3da2a0de61edcdca07b7fcd73a16de9da4a1f7d6
We should fall back to GMT if neither the environment variable nor the
system property is set. This is the case if you wipe a WiFi-only device,
because we currently only take the time zone from cell networks.
Bug: http://b/24773112
Change-Id: I90d236d4d492b6562d75021bd312030b91c1e298
