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Hans Boehm 70a46d674a Fix memory order and race bugs in Refbase.h & RefBase.cpp 
Convert to use std::atomic directly.

Consistently use relaxed ordering for increments, release ordering
for decrements, and an added acquire fence when the count goes to
zero.

Fix what looks like another race in attemptIncStrong:
It seems entirely possible that the final adjustment for
INITIAL_STRONG_VALUE would see e.g. INITIAL_STRONG_VALUE + 1,
since we could be running in the middle of another initial
increment.

Attempt to somewhat document what this actually does, and
what's expected from the client. Hide the documentation in
the .cpp file for now.

Remove a confusing redundant test in decWeak. OBJECT_LIFETIME_STRONG
and OBJECT_LIFETIME_WEAK are the only options, in spite of some
of the original comments.

It's conceivable that either of these issues has resulted in
actual crashes, though I would guess the probability is small.
It's hard enough to reason about this code without the bugs.

Bug: 28705989
Change-Id: I4107a56c3fc0fdb7ee17fc8a8f0dd7fb128af9d8
(cherry picked from commit e263e6c633)
2016-05-19 16:18:26 -07:00
adb adb: use asocket's close function when closing. 2016-05-18 17:20:30 -07:00
adf Adf: Remove unused variable 2015-07-27 22:08:16 -07:00
base Merge "base: Avoid compilation error when compiled with -Wdangling-else." into nyc-dev 2016-03-30 19:29:11 +00:00
bootstat bootstat: Differentiate system update boot times. 2016-04-11 10:17:46 -07:00
cpio fs_config: replace getenv('OUT') by new fs_config parameter 2015-07-09 21:47:07 -07:00
crash_reporter crash_reporter_tests: Compile only on 'eng' builds. 2016-02-04 13:56:25 -08:00
debuggerd Merge "Set groups before dropping privileges." into nyc-dev 2016-05-05 21:49:43 +00:00
fastboot DO NOT MERGE ANYWHERE Remove the USB vendor id whitelist from fastboot. 2016-05-03 10:14:02 -07:00
fingerprintd Fingerprint: Plumb enumerate support. 2015-12-04 10:07:55 -08:00
fs_mgr If we fail to format a blank partition, try recovery 2016-05-03 10:01:03 -07:00
gatekeeperd Move gatekeeperd to system-background cpuset. 2016-04-15 14:29:40 +02:00
healthd healthd: Check if battery device exists instead of charger drivers before setting fake properties. am: 9cb3d3ccf4 2016-05-17 18:23:04 +00:00
include Fix memory order and race bugs in Refbase.h & RefBase.cpp 2016-05-19 16:18:26 -07:00
init Wipe device on policy error 2016-05-10 11:04:39 -07:00
libbacktrace libbacktrace: only build libbacktrace_offline static library. 2016-04-14 14:37:37 -07:00
libbinderwrapper libbinderwrapper: Add BinderWrapper::GetOrCreateInstance() 2016-01-04 12:56:27 -08:00
libcutils atrace: read package names from multiple sysprops 2016-04-29 10:56:41 -07:00
libdiskconfig am eb075e28: am c8179498: am 2f62edf7: Merge "libdiskconfig: Turn on -Werror" 2014-05-21 21:19:27 +00:00
libion am 8d2cd035: am 2ddb9cb1: am ed43be39: Merge "Remove LOCAL_ADDITIONAL_DEPENDENCIES in cases where it\'s not needed." 2015-04-02 22:07:16 +00:00
liblog Return correct length from pmsgRead() 2016-05-09 16:53:30 +00:00
libmemtrack Remove a hack for getting libpagerank's headers. 2015-09-22 22:35:30 -07:00
libmemunreachable Silently ignore duplicate heap entries 2016-04-28 16:20:40 -07:00
libmincrypt Enable clang compilation. 2015-05-15 16:13:19 -07:00
libnativebridge Revert "nativebrige: log code_cache access errors to stderr as well" 2016-01-27 17:53:20 +00:00
libnativeloader Set parent namespace for linker-namespaces 2016-05-17 15:58:56 -07:00
libnetutils Remove a dead header (<netutils/dhcp.h>). 2016-05-18 14:22:15 -07:00
libpackagelistparser packagelistparser: rename to libpackagelistparser 2015-11-05 12:12:38 -08:00
libpixelflinger Use dlmalloc from external/dlmalloc instead of bionic/. 2016-01-22 11:04:35 -08:00
libprocessgroup Don't use mem cgroups for pid accounting. 2016-03-18 15:35:48 +01:00
libsparse Fix static analyzer issues caught by clang 2016-02-01 11:19:26 -08:00
libsuspend Adds a parameter to the wakeup_callback to report sucessful wakeup or suspend aborts. 2015-06-25 13:15:22 -07:00
libsync Fix isValid() condition for libsync tests 2015-11-05 10:07:53 -08:00
libsysutils Tolerate RTM_DELADDR messages from deleted interfaces. 2016-02-16 23:12:26 +09:00
libusbhost libusbhost: add usb_device_reset 2016-01-13 16:01:42 -08:00
libutils Fix memory order and race bugs in Refbase.h & RefBase.cpp 2016-05-19 16:18:26 -07:00
libziparchive libziparchive: ensure ReadAtOffset is atomic 2016-03-09 17:17:19 -08:00
lmkd lmkd: subscribe to low mempressure events. 2016-02-09 11:25:18 +01:00
logcat logcat: apct test failures 2016-04-15 16:38:42 +00:00
logd logd: check return values 2016-03-02 11:37:21 -08:00
logwrapper am eaf04aa0: am 3b94cef1: Merge "Add FORK_EXECVP_OPTION_CAPTURE_OUTPUT to logwrap.h" 2015-08-22 02:40:51 +00:00
metricsd Merge "metricsd: Create a brillo::MessageLoop." 2016-02-04 23:38:54 +00:00
mkbootimg mkbootimg: use int for os_version and os_patch_level 2016-03-29 18:27:13 -07:00
reboot reboot: Turn on -Werror 2014-05-21 12:58:38 -07:00
rootdir Merge "Don't start defaultcrypto twice" into nyc-dev 2016-04-19 14:44:26 +00:00
run-as run-as should accept /data/user/0 symlink 2016-03-21 07:56:46 -06:00
sdcard Add support for FUSE_CANONICAL_PATH 2016-04-25 20:42:57 -07:00
toolbox Allow building with Python 3.x 2016-03-08 08:18:34 -08:00
trusty [core][trusty] add gatekeeper module 2015-11-12 12:19:48 -08:00
tzdatacheck Track rename of base/ to android-base/. 2015-12-04 22:00:26 -08:00
.gitignore Ignore adb/*.pyc files 2015-08-11 12:59:58 -07:00
Android.mk
CleanSpec.mk Add a CleanSpec for grep/toolbox. 2015-03-22 18:04:54 -07:00
MODULE_LICENSE_APACHE2 auto import from //depot/cupcake/@135843 2013-07-30 13:56:49 -07:00
NOTICE Fix omission in NOTICE file. 2013-07-30 13:56:55 -07:00