this works by building a directed graph of acquired
pthread mutexes and making sure there are no loops in
that graph.
this feature is enabled with:
setprop debug.libc.pthread 1
when a potential deadlock is detected, a large warning is
output to the log with appropriate back traces.
currently disabled at compile-time. set PTHREAD_DEBUG_ENABLED=1
to enable.
Change-Id: I916eed2319599e8aaf8f229d3f18a8ddbec3aa8a
Use tgkill instead of tkill to implement pthread_kill.
This is safer in the event that the thread has already terminated
and its id has been reused by a different process.
Change-Id: Ied715e11d7eadeceead79f33db5e2b5722954ac9
__atomic_cmpxchg and other related atomic operations did not
provide memory barriers, which can be a problem for non-platform
code that links against them when it runs on multi-core devices.
This patch does two things to fix this:
- It modifies the existing implementation of the functions
that are exported by the C library to always provide
full memory barriers. We need to keep them exported by
the C library to prevent breaking existing application
machine code.
- It also modifies <sys/atomics.h> to only export
always-inlined versions of the functions, to ensure that
any application code compiled against the new header will
not rely on the platform version of the functions.
This ensure that said machine code will run properly on
all multi-core devices.
This is based on the GCC built-in sync primitives.
The end result should be only slightly slower than the
previous implementation.
Note that the platform code does not use these functions
at all. A previous patch completely removed their usage in
the pthread and libstdc++ code.
+ rename arch-arm/bionic/atomics_arm.S to futex_arm.S
+ rename arch-x86/bionic/atomics_x86.S to futex_x86.S
+ remove arch-x86/include/sys/atomics.h which already
provided inlined functions to the x86 platform.
Change-Id: I752a594475090cf37fa926bb38209c2175dda539
* commit '6b6ebeca985fb3843b56b507ac4ac1be44080a9c':
enable support for large files (> 2G)
Enable functional DSO object destruction
x86: Enable -fstack-protector
Update X86 Bionic CRT files for unwind/exceptions
bionic, libthread_db x86 fixes
Updated gcc 4.4.3 IA toolchain doesn't require the .ctors list
Remove an extra register move.
Replace __atomic_XXX with GCC __sync_XXX intrinsics.
move some typedefs to procfs.h required by gdbserver build
use consistent guards for off_t and size_t defines for IA
Simplify variable typing for IA builds
sigsetmask.c was not processing the "mask" argument.
Add defines for CAIF support
Remove extra/unneeded copy of fenv.h
Use proper variable typing
Update ATOM string routines to latest
Fix undefined reference to dl_iterate_phdr for x86
Fix missing NL
ptrace.c Fix source file format to unix from dos
* commit '3a13102637c8be53edf28f96598ac11aaa3e14df':
enable support for large files (> 2G)
Enable functional DSO object destruction
x86: Enable -fstack-protector
Update X86 Bionic CRT files for unwind/exceptions
bionic, libthread_db x86 fixes
Updated gcc 4.4.3 IA toolchain doesn't require the .ctors list
Remove an extra register move.
Replace __atomic_XXX with GCC __sync_XXX intrinsics.
move some typedefs to procfs.h required by gdbserver build
use consistent guards for off_t and size_t defines for IA
Simplify variable typing for IA builds
sigsetmask.c was not processing the "mask" argument.
Add defines for CAIF support
Remove extra/unneeded copy of fenv.h
Use proper variable typing
Update ATOM string routines to latest
Fix undefined reference to dl_iterate_phdr for x86
Fix missing NL
ptrace.c Fix source file format to unix from dos
Unfortunately, legacy .so files for ARM don't have a correct crtbegin file.
Consequently, we have to grandfather the old __dso_handle behaviour.
Add some ifdefs for ARM to allow it to use the old code until we can work
out a transition.
Change-Id: I6a28f368267d792c94e1d985d8344023bc632f6f
Author: H.J. Lu <hongjiu.lu@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
libcutils/mspace.c includes libc/bionic/dlmalloc.c, we need to
take care of the fact that any internal C library function cannot
be used from it.
Change-Id: I0bc81ae090b7ac2d464f26b97fc6b94a08cdad9c
The latest merge conflict resolution worked only for ARM, but not for x86
Both ARM and x86 builds have been tested with this fix.
Change-Id: I4ec1f1b0ea32fa86e7e2515b221133473d6550a3
NOTE: Care has been taken to not change the compiler flags for ARM builds.
In particular, when building crtbegin_so.so, the -fPIC flag is only
used for x86 (previous reports indicate that it breaks the ARM
build at runtime for obscure reasons).
Unfortunately, legacy .so files for ARM don't have a correct crtbegin file.
Consequently, we have to grandfather the old __dso_handle behaviour.
Add some ifdefs for ARM to allow it to use the old code until we can work
out a transition.
Change-Id: I6a28f368267d792c94e1d985d8344023bc632f6f
Author: H.J. Lu <hongjiu.lu@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Reference results of the experiments on TI OMAP3430 at 600 MHz
$ bench_strcmp -N "strcmp_1k" -s 1k -I 200
[original C code]
prc thr usecs/call samples errors cnt/samp size
strcmp_1k 1 1 10.38000 102 0 15000 1024
[ARM optimized code]
prc thr usecs/call samples errors cnt/samp size
strcmp_1k 1 1 3.08840 88 0 15000 1024
The work was derived from ARM Ltd, contributed to newlib, and reworked
for Android by Linaro.
Change-Id: Ib0d5755e1eb9adb07d80ef0252f57a5c4c57a425
Signed-off-by: Jim Huang <jserv@0xlab.org>
Added a memmove() variant for Dalvik's System.arraycopy()
implementation. It guarantees 16-bit or 32-bit atomicity depending
on the alignment of the arguments.
Bug 3398352
Change-Id: Ie7bd246305ef0ff8290513663327c5b81680368d
It adds two functions sigsetjmp and siglongjmp
that fix compiling errors in bluetooth and mksh.
Copy directly from sigsetjmp.S of OpenBSD.
Change-Id: I4696f82ee6f85d1c93cbdd3c9e40f4917d50f3a6
This patch improves the handling of 64-bit parameters in syscalls on ARM.
The ARM EABI mandates that 64-bit quantities be passed in even/odd register
pairs, which requires special treatment.
This allows us to simplify our implementations of pread() and pwrite()
and remove the C stubs for pread64() and pwrite64().
Also add ftruncate64() to <unistd.h>
Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef
Bug 3107933
This adds the cpu_set_t type definition and related functions
and macros used to handle CPU thread affinity.
sched_getcpu()
sched_setaffinity()
sched_getaffinity()
Change-Id: If382ecafde8926341a88478062b275553645065b
64-bit pread() and pwrite() is needed for ZipFileRO to be able to read
ludicrously large ZIP files just in case someone is crazy enough to do
it.
Also fix a license header that was apparently mangled.
Change-Id: I6819ef8b36e46b63b40749c95717b1ecf9307033
Originally, there are _rand48 (in libc/bionic/_rand48.c) and __rand48
(in libc/stdlib/_rand48.c) implemented in bionic. Besides the naming,
the functionality is identical. This patch removes the duplicated
_rand48. Also, drand48 and erand48 are modified accordingly.
Change-Id: Ie5761a0a97f45df8538222a77edacb7c3e0125d7
Merge commit '6bf08d131f4109088b7fa1e53196513636c49e9b'
* commit '6bf08d131f4109088b7fa1e53196513636c49e9b':
Move the atom optimization flags into TARGET_linux-x86.mk.
Merge commit '3558834c565bbfe96dfcf233373c3814b4655347' into gingerbread-plus-aosp
* commit '3558834c565bbfe96dfcf233373c3814b4655347':
Move the atom optimization flags into TARGET_linux-x86.mk.
Merge commit '994b68f5c7d637d2945c06260fe35b266c10379d'
* commit '994b68f5c7d637d2945c06260fe35b266c10379d':
Fix __get_tls() in static C library to use kernel helpers.
Merge commit '90e83bcc1c41a4d6d310b2bd5cb747a53a88fff3'
* commit '90e83bcc1c41a4d6d310b2bd5cb747a53a88fff3':
Fix undefined reference to dl_iterate_phdr for x86
With this patch _and_ an upcoming build/ patch, the destruction
of static C++ objects contained in shared libraries will happen
properly when dlclose() is called.
Note that this change introduces crtbegin_so.S and crtend_so.S which
are currently ignored by the build system.
+ move definition of __dso_handle to the right place
(before that, all shared libraries used the __dso_handle
global variable from the C library).
Note that we keep a 'weak' __dso_handle in aeabi.c to avoid
breaking the build until the next patch to build/core/combo/
appears. We will be able to remove that later.
+ move bionic/aeabi.c to arch-arm/bionic/ (its proper location)
NOTE: The NDK will need to be modified to enable this feature in
the shared libraries that are generated through it.
Change-Id: I99cd801375bbaef0581175893d1aa0943211b9bc
Merge commit '50ace4fec5e8cb5afcbc656a4556fa528adfd760' into gingerbread-plus-aosp
* commit '50ace4fec5e8cb5afcbc656a4556fa528adfd760':
Remove compiler warnings when building Bionic.
Merge commit 'e1a739ec38a39fea9e66038dfc7cea364cb6a256'
* commit 'e1a739ec38a39fea9e66038dfc7cea364cb6a256':
Allow static C++ destructors to be properly called on dlclose().
Also add missing declarations to misc. functions.
Fix clearerr() implementation (previous was broken).
Handle feature test macros like _POSIX_C_SOURCE properly.
Change-Id: Icdc973a6b9d550a166fc2545f727ea837fe800c4
Merge commit '6a9b888d7c4b246f6f66360789c72b754ff85021' into gingerbread-plus-aosp
* commit '6a9b888d7c4b246f6f66360789c72b754ff85021':
Allow static C++ destructors to be properly called on dlclose().
With this patch, _and_ an upcoming build/ patch, the destruction
of static C++ objects contained in shared libraries will happen
properly when dlclose() is called.
Note that this change introduces crtbegin_so.S and crtend_so.S which
are currently ignored by the build system.
+ move definition of __dso_handle to the right place
(before that, all shared libraries used the __dso_handle
global variable from the C library).
Note that we keep a 'weak' __dso_handle in aeabi.c to avoid
breaking the build until the next patch to build/core/combo/
appears. We will be able to remove that later.
+ move bionic/aeabi.c to arch-arm/bionic/ (its proper location)
Change-Id: Ie771aa204e3acbdf02fd30ebd4150373a1398f39
NOTE: The NDK will need to be modified to enable this feature in
the shared libraries that are generated through it.
Merge commit '6a09cfd9f916e3a60de707ff0806cdeb143d77a4' into gingerbread-plus-aosp
* commit '6a09cfd9f916e3a60de707ff0806cdeb143d77a4':
wchar.h: improve wchar_t support in Bionic
Update ARM atomic ops to use LDREX/STREX. Stripped out #if 0 chunk.
Insert explicit memory barriers in pthread and semaphore code.
For bug 2721865.
Change-Id: I0f153b797753a655702d8be41679273d1d5d6ae7
GDB looks for specific opcode sequences when trying to recognize a stack
frame as a signal trampoline. The sequences it looks for happen to be those
created when SA_RESTORER is set, since glibc always sets a restorer. This
patch does the same here, so that the trampolines can be correctly identified.
Change-Id: I0ac574a68818cb24d939c3527f3aaeb04b853d04
Any of the setuid functions now updates /acct/uid/ with its own tid
before changing users. This is so we can properly account for cpu time
per uid.
Change-Id: I34186cf4d5228cac8439e582a9e26c01ef3011e4
Signed-off-by: Mike Chan <mike@android.com>
Only provide an implementation for ARM at the moment, since
it requires specific assembly fragments (the standard syscall
stubs cannot be used because the child returns in a different
stack).
Merge commit 'ca07064c9ebd8523ed88fa09e97feaaafb7e9c15' into eclair-mr2-plus-aosp
* commit 'ca07064c9ebd8523ed88fa09e97feaaafb7e9c15':
Revert "Add qsort_r() implementation to the C library."
Merge commit '5f53a18204ec991f5a77872806eeaa185936aa8c' into eclair-plus-aosp
* commit '5f53a18204ec991f5a77872806eeaa185936aa8c':
Revert "Add qsort_r() implementation to the C library."
Merge commit '5f53a18204ec991f5a77872806eeaa185936aa8c' into eclair-mr2
* commit '5f53a18204ec991f5a77872806eeaa185936aa8c':
Revert "Add qsort_r() implementation to the C library."
Merge commit '20b3097d4cc225d948dac38e778a9d3b3b1549db' into eclair-mr2-plus-aosp
* commit '20b3097d4cc225d948dac38e778a9d3b3b1549db':
Add qsort_r() implementation to the C library.
This reverts commit 754c178ae5.
Turns out we don't need it afterall (needed a stable sort anyways).
So, we'll make that change in the dev branch instead.
Merge commit '754c178ae551aedcbbfd3bfd1c1c3b710d9ad989' into eclair-mr2
* commit '754c178ae551aedcbbfd3bfd1c1c3b710d9ad989':
Add qsort_r() implementation to the C library.
Merge commit '754c178ae551aedcbbfd3bfd1c1c3b710d9ad989' into eclair-plus-aosp
* commit '754c178ae551aedcbbfd3bfd1c1c3b710d9ad989':
Add qsort_r() implementation to the C library.
NOTE: This replaces qsort.c with the FreeBSD version. While
the patch changes the source, it should not alter the
implementation that should use the exact same algorithm.
Merge commit '362b2aabee2dd04e04a3ad9c09f0ad0212569be4' into eclair-mr2-plus-aosp
* commit '362b2aabee2dd04e04a3ad9c09f0ad0212569be4':
Split libc_debug.so into two .so modules loaded on demand from libc.so
This change is intended to eliminate need to replace libc.so with libc_debug.so in order to enablememory allocation debugging.
This is also the first step towards implementing extended memoryallocation debugging using emulator's capabilities in monitoring memory access.
For performance reasons, we don't call the kernel helper. Instead, we directly
access the TLS register on ARMv6 and higher. For ARMv5TE, keep using the hard-coded
address populated by the kernel on each task switch.
NOTE: Since we don't call the kernel helper, this must precisely match your
kernel configuration. This is controlled by setting the ARCH_ARM_HAVE_TLS_REGISTER
variable to 'true' in your board configuration file.
Removes a lot of redundant code, and reorganizes the file. We first
setup all the comomn variables we may need, and then define the
actual libraries that need to be generated.
Signed-off-by: Dima Zavin <dima@android.com>
