CgroupController::IsUsable is using a global static variable to store the
existence of the controller. That means the first controller existence
check would affect all other controllers. Fix this by making this variable
to be a member of CgroupController class so that each controller can check
for its existence independently of other controllers.

Fixes: aa1d54f0ccbb ("Remove ACgroupController_getFlags to fix API breakage")
Bug: 136020193
Test: adb shell cat /proc/$pid/task/*/cgroup" prints "cpuset:/top-app"
Test: for new launched activity process
Change-Id: I4741a9126ea494122d5b2b1a0c4d7252bff6025c
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

This reverts commit 1ec3b78b6739caf0d855048a304c70349611a9b0.

Reason for revert: breaks all camera use cases

Bug: 135568875

Exempt-From-Owner-Approval: revert, no build cop

Change-Id: Iec8e1f94f5bedced3f3faf73f851fd2f13e2e768

libprocessgroup symbols are being moved into libcutils in order to
optimize linking/memory usage. libprocessgroup will no longer be
required in the future (however removing references to it will come
separately).

Bug: 135145426
Test: boot

Test:
BEFORE:
$ adb shell showmap -a $(pid hwservicemanager) | grep -P "libprocessgroup|libcutils" -A1 | grep -P 'libprocessgroup|libcutils|\.bss' | awk '{s += $9}END{print s}'
28

AFTER:
$ adb shell showmap -a $(pid hwservicemanager) | grep -P "libprocessgroup|libcutils" -A1 | grep -P 'libprocessgroup|libcutils|\.bss' | awk '{s += $9}END{print s}'
12

Change-Id: I10d7c2d2b2b14cbbe0a128b9156d31206419d24c

Since ACgroupController_getFlags was introduced after LLNDK freeze it
causes media crashes due to missing symbol. Remove the new function and
re-implement cgroup controller detection to not require flags field but
instead check for its existence on the first access.

Bug: 135049992
Test: libcutils_test with and without CONFIG_CPUSETS enabled
Change-Id: I0220d6a926884dc22a7424d7d0a980c379c6f4eb
Merged-In: I0220d6a926884dc22a7424d7d0a980c379c6f4eb
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

while enable fdsan (file descriptor sanitizer),
fdsan report use-after-close error after boot complete (sedom).

Because, in SetCgroupAction::EnableResourceCaching() currently has a data race against all the
use fd_ functions like SetCgroupAction::ExecuteForProcess(uid_t uid, pid_t pid) etc.

ThreadA                                     | ThreadB
-------------------------------------------------------------------------------------------------
in SetCgroupAction::EnableResourceCaching() | in SetCgroupAction::ExecuteForProcess(...)
-------------------------------------------------------------------------------------------------
                                            | in SetCgroupAction::AddTidToCgroup(int tid, int fd)
-------------------------------------------------------------------------------------------------
fd_ = std::move(fd); /*modified fd_ value*/ |
-------------------------------------------------------------------------------------------------
                                            | write(fd)  /* crash here, fd is closed by ThreadA*/
-------------------------------------------------------------------------------------------------

So, add mutex lock to protect fd_ data race.

Bug: 134120826
Test: auto test, run the adb reboot test 100 times and no fdsan error report on libprocessgroup
Merged-In: Iccf2f705e030f79324f1164509e715dc5be825de
Change-Id: Iccf2f705e030f79324f1164509e715dc5be825de

Controllers listed in cgroups.json file might fail to mount if kernel is
not configured to support them. We need a way to indicate whether a
controller was successfully mounted and is usable to avoid logging errors
and warnings when a controller that failed to mount is being used. Add
flags bitmask to cgrouprc controller descriptor and use a bit to indicate
that controller is successfully mounted. Modify cpusets_enabled() and
schedboost_enabled() functions to use this bit and report the actual
availability of the controller.

Bug: 124080437
Test: libcutils_test with cpuset and schedtune controllers disabled
Change-Id: I770cc39fe50465146e3205aacf77dc3c56923c5d
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

The majority of libjsoncpp use is due to libprocessgroup.  Static
linking reduces relocations required at runtime as well as compacts the
pages dirtied by relocations.  On a 32-bit system, where this matters
the most, this reduces 8KB of dirty pages per libprocessgroup load.
Overall, the dirty page reduction on 32-bit cuttlefish is ~500KB.

Bug: 132275636
Test: Boot on cuttlefish.  Calculate total amount of dirty memory used
      for libprocessgroup and libjsoncpp.
Change-Id: I1135bb45a3764f96a4a3a47c98fbcdee3913c988

Limit libprocessgroup VNDK API to the minimum set required for task
profiles usage. This API allows vendors to use cgroups without accessing
cgroup files directly, therefore allowing Android to change cgroup
arrangement details without breaking vendor code.

Bug: 131098932
Test: build and boot
Change-Id: I92463dfb44a108a133bafd2fe52237b6b1d50a69
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

This reverts commit bee9f5718bd2dfedb615767bbd25147b4f3eed15
"libprocessgroup: Disable file descriptor caching temporarily" and adds
option to use SetTaskProfiles and SetProcessProfiles without file caching.
This option is used from JNI to avoid access denials because cached files
are not whitelisted for JNI usage.

Bug: 123868658
Bug: 123043091
Test: boot using svelte target
Change-Id: I76b9d6af8a1dd4464cb3cf3e6dc327980efdf361
Signed-off-by: Suren Baghdasaryan <surenb@google.com>