We already had the POSIX strerror_r, but some third-party code defines
_GNU_SOURCE and expects to get the GNU strerror_r instead.
This exposed a bug in the libc internal logging functions where unlike
their standard brethren they wouldn't return the number of bytes they'd
have liked to have written.
Bug: 16243479
Change-Id: I1745752ccbdc569646d34f5071f6df2be066d5f4
GCC assembler allows xyz to be redeclared as weak,
by __weak_alias(xyz, _xyz), while _xyz is undefined.
Clang does not like that but silently generates no code.
It will reject its own .s file if the assembly code is saved first.
Since we have no reason to define xyz or _xyz as weak symbol now,
and _xyz is a macro to xyz, we simplify libC to have only
xyz defined as global.
BUG: 17186746
Change-Id: I24b154425838683cae69248cc750c59e26fd5467
...rather than just what's already mapped in. This seems somewhat
contrary to POSIX's "All pages within the stack described by stackaddr
and stacksize shall be both readable and writable by the thread", but
it's what glibc does.
Bug: 17111575
Change-Id: If9e2dfad9a603c0d0615a8123aacda4946e95b2c
This speeds up the debug malloc code by using the original unwinding code.
The only catch is that it has to link in the libc++ arm unwind code or
there will be crashes when attempting to unwind through libc++ compiled
code.
Bug: 16874447
(cherry picked from commit 3f7635f4906c53fa744731efc35235456b7d93bf)
Change-Id: If8a3821cdd95ed481bb496bf2daab449d13790f8
This speeds up the debug malloc code by using the original unwinding code.
The only catch is that it has to link in the libc++ arm unwind code or
there will be crashes when attempting to unwind through libc++ compiled
code.
Bug: 16874447
Change-Id: Ifdbbcbd4137d668b25cf3c2bd59535e06ebfa5a7
Stdatomic.h was potentially redefining _Atomic, in spite of a
prior definition by <atomic>. This could cause g++ builds that
included <stdatomic.h> with an available <atomic> header to break.
Change-Id: I562c7115118c0587d594d4d5b62d25101e47bfd8
On most architectures the kernel subtracts a random offset to the stack
pointer in create_elf_tables by calling arch_align_stack before writing
the auxval table and so on. On all but x86 this doesn't cause a problem
because the random offset is less than a page, but on x86 it's up to two
pages. This means that our old technique of rounding the stack pointer
doesn't work. (Our old implementation of that technique was wrong too.)
It's also incorrect to assume that the main thread's stack base and size
are constant. Likewise to assume that the main thread has a guard page.
The main thread is not like other threads.
This patch switches to reading /proc/self/maps (and checking RLIMIT_STACK)
whenever we're asked.
Bug: 17111575
Signed-off-by: Fengwei Yin <fengwei.yin@intel.com>
Change-Id: I1d4dbffe7bc7bda1d353c3a295dbf68d29f63158
Without these specs, clang will reports mismatch between standard definitions and these declarations/definitions. These specs are ignored when compiled with -fno-exceptions.
BUG: 17136236
Change-Id: I386c712a61dc4fc74dfde45f9ec2d3d037f2e9f1
We seem to use this stdatomic.h sometimes, and slightly different prebuilts
at other times, making them all difficult to test, and making it unclear
which one we're testing. This generalizes the bionic header so that it
can be used directly as the prebuilt header as well. So long as they
don't diverge again, that should somewhat improve test coverage.
Use the correct builtin for atomic_is_lock_free.
Fix atomic_flag_init.
Turn on atomic tests even with __GLIBC__, since they now appear to pass.
Include uchar.h in stdatomic.h where needed.
Add a basic memory ordering test.
Fix bit-rotted comments in bionic tests makefile.
Change-Id: If6a14c1075b379395ba5d93357d56025c0ffab68
Also remove declaration.
The only user is compiler-rt, and they can replace that call with one to
syscall(2). compiler-rt doesn't currently build on mips64 anyway.
Bug: 11156955
Change-Id: Ieae0ba49c8e7aa50253401fc1d7c2d17bc867d39
