Commit graph

77 commits

Author SHA1 Message Date
Tianjie Xu
8f397309b4 Move librecovery_ui to a sub-directory
This helps to expose librecovery_ui for device specific RecoveryUi.

Bug: 76436783
Test: mma, unit tests pass
Change-Id: Ic6c3d301d5833e4a592e6ea9d9d059bc4e4919be
(cherry picked from commit b5108c372c)
2019-03-21 10:46:11 -07:00
xunchang
37304f3cc9 Implement FilePackage class
This is another implementation of the Package class. And we will later
need it when reading the package from FUSE.

Bug: 127071893
Test: unit tests pass, sideload a file package on sailfish
Change-Id: I3de5d5ef60b29c8b73517d6de3498459d7d95975
2019-03-14 15:35:09 -07:00
Tao Bao
f242a7ec2c tests: Temporarily disable ScreenRecoveryUITest tests.
Seems they're racing with SurfaceFlinger in acquiring the display, which
occasionally takes down the device and leads to test failures.

Bug: 120601844
Test: Run recovery_unit_test on marlin. ScreenRecoveryUITest not
      triggered.
Change-Id: I80b21595247a87fc1f2f95aa68df59f58bdf0257
2018-12-06 13:05:05 -08:00
Tao Bao
dd78982d58 minui: GRSurface::Create() computes data_size on its own.
GRSurface::Create() doesn't need to rely on caller specifying the buffer
size, as it can compute that info based on the given args.

This CL also uses `size_t` for all the parameters in
GRSurface::Create().

Test: Run recovery_unit_test on marlin.
Test: Build and boot into blueline recovery. `Run graphics test`.
Test: Build and boot into blueline charger mode.
Change-Id: Idec9381079196abf13553a475006fefcfca10950
2018-11-26 22:46:19 -08:00
Tao Bao
2201d08f8d minui: Fix a wrong arg in calling GRSurface::Create().
This is a bug introduced while refactoring init_display_surface(), in
[1]. As a result, user of res_create_multi_display_surface(), which is
effectively `charger` right now, crashes due to buffer overrun.

This CL fixes the wrong arg and adds a sanity test for
res_create_multi_display_surface(). The testdata (battery_scale.png) is
copied from system/core/healthd/images/battery_scale.png.

[1] commit 44820ac1e3.

Bug: 119122296
Test: Run recovery_unit_test on marlin.
Test: Build and boot into charger mode on blueline. Verify that
      `charger` no longer crashes.
Change-Id: Ib6d083e1512a9c3c6eb63874d26d22658921d693
2018-11-26 17:06:53 -08:00
Mark Salyzyn
8b54bc5e04 switch to using android-base/file.h instead of android-base/test_utils.h
Test: compile
Bug: 119313545
Change-Id: I664fb32522d01909c603d7b903475c4e9aea9223
2018-11-14 15:49:19 -08:00
Tao Bao
da409fb8d6 ui: Manage loaded resources with smart pointers.
Test: Run recovery_unit_test on marlin.
Test: `Run graphics test` on marlin.
Change-Id: I8239c3d9fb288f80ee11f615402768ff8ef8ecd0
2018-11-05 10:15:59 -08:00
Tao Bao
63b59dcead minui: Add GRSurface::Clone().
Clone() allows duplicating the image that's stored in the GRSurface.

Test: Run recovery_unit_test.
Change-Id: Ia50d507c6200f2de5f17143775de805247a60e1f
2018-11-01 12:14:46 -07:00
Tao Bao
929e481e71 tests: Use FRIEND_TEST in ScreenRecoveryUITest.
Test: Run recovery_unit_test on marlin.
Change-Id: I93ec6df8c056b2c485200822f18db0b852595242
2018-10-31 23:09:49 -07:00
Tao Bao
44820ac1e3 minui: Add a protected GRSurface ctor.
This prepares for the removal of the default and copy ctors, by making
GRSurface::Create() as the only way to get GRSurface instances.

Test: mmma -j bootable/recovery
Test: Run recovery_unit_test on marlin.
Change-Id: I0c34c3f3967e252deb020907c83acbac8a8f36b9
2018-10-31 11:19:28 -07:00
Treehugger Robot
47b650b588 Merge "ui: Add constness to Draw- functions." 2018-10-24 00:28:21 +00:00
Tianjie Xu
1e10cc4297 Add a function to construct the GRSurface in test
This fixes the build error as the initializer list no longer work
without the proper constructor for c++ class.

Bug: 74397117
Test: unit tests pass
Change-Id: If3ff508a1a01ad5326413dab8e05bacae8a946c8
2018-10-23 12:10:46 -07:00
Tianjie Xu
06ccd00ef5 Merge "Add function to show localized rescue party menu" 2018-10-23 18:16:23 +00:00
Tao Bao
65815b6d3a ui: Add constness to Draw- functions.
These functions take the given GRSurface instances as inputs, which
shouldn't be altered.

Test: mmma -j bootable/recovery
Test: Run recovery_unit_test.
Test: `Run graphics test` on marlin.
Change-Id: I51bf408e85faae2b497d4f148ab1dec22dd16c93
2018-10-23 10:56:54 -07:00
Tao Bao
92bdb5a389 minui: Move GRSurface into a class.
This CL adds GRSurface::Create() and dtor for managing the allocated
memory in GRSurface class. It also adds GRSurface::data() that hides the
underlying implementation, with both of const and non-const overloads.
This allows `const GRSurface&` to be more useful - previously it only
ensured a const member variable of `data`, instead of a read-only buffer
it points to.

It also marks the parameters in gr_texticon() and gr_blit() as const, as
they're incoming source that shouldn't be altered. It corrects the type
of gr_draw, which is the sink to be painted on (an earlier attempt was
made in [1], but didn't get the full picture correctly).

[1] https://android-review.googlesource.com/c/platform/bootable/recovery/+/704757/

Test: mmma -j bootable/recovery
Test: recovery_unit_test on marlin
Test: Run graphics test on marlin (fbdev).
Test: Run graphics test on blueline (drm).
Change-Id: I7904df084cd6c08fa04a9da97d01b4b1a6e3a20c
2018-10-22 18:18:02 -07:00
Tianjie Xu
b99e6069c1 Add function to show localized rescue party menu
Add a function in screenUI to display the pre-generated graphs for
rescue party. If these graphs are not valid, falls back to display
the old text strings.

Right now we haven't generated the localized graphs yet, so the UI
always shows the TextMenu.

Bug: 116655889
Test: check rescue party under recovery
Change-Id: I0558cb536b659cdc25c8b7946d3a39820935b003
2018-10-22 15:27:33 -07:00
Tianjie Xu
66dbf63080 Implement the graphic menus
As we plan to show localized rescue party dialogs under recovery mode
with pre-generated images, it becomes necessary to show the menu headers
and items with images.

This cl converts the menu class to a interface and derived TextMenu &
GraphicMenu classes. And the GraphicMenu uses GRSurfaces* as the menu header
and a list of GRSurfaces* as menu items.

Moreover, factor out the Draw* functions in the ScreenUI into a separate
DrawInterface. Therefore, the Menu class can access these draw functions and
use them to implement the DrawHeaders & DrawItems neatly.

Bug: 74397117
Test: unittests pass, boot into recovery and check menu
Change-Id: I95cee30f3e5eb666eb6fbcdfc873a7260fc177c1
2018-10-12 17:18:50 -07:00
Tianjie Xu
2b1a464a70 Move the parse of last_install to recovery-persist
The recovery-persist used to look for the related recovery logs in
persist storage, and copy them under /data/misc/recovery during the
normal boot process.

As we also want to find out the sideload information from last_install,
it makes more sense to move the parse & report of non-a/b metrics to
recovery-persist. Thus we can avoid the race condition of the file
system between the native code and RecoverySystem.

Bug: 114278989
Test: unit test pass, check the event buffer for metrics report
Change-Id: I32d7b2b831bc74a61a70af9a2f0b8a7e9b3e36ee
2018-09-13 13:27:55 -07:00
Tao Bao
09e8493861 applypatch: {Load,Save}FileContents return bool values.
Bug: 110106408
Test: Run recovery_unit_test and recovery_component_test on marlin.
Change-Id: Id72e24dd00eb451565d90cff6e049f4f4b844ea2
2018-08-31 14:31:19 -07:00
Tao Bao
5609bc8b34 applypatch: Refactor applypatch().
applypatch() was initially designed for file-based OTA, operating on
individual files. It was later extended to allow patching eMMC targets
as a whole, in favor of block-based updates.

As we have deprecated file-based OTA since Oreo, part of the code in
applypatch() has become obsolete. This CL refactors the related
functions, by removing the obsolete logic and focusing on eMMC targets.

Since this CL substantially changes applypatch APIs, it adds new
functions to avoid unintentionally mixing them together. In particular,
it removes `applypatch()`, `applypatch_check()`, `applypatch_flash()`,
and adds `PatchPartition()`, `PatchPartitionCheck()`, `FlashPartition()`
and `CheckPartition()`. It also replaces the old Edify functions
`apply_patch()` and `apply_patch_check()` with `patch_partition()` and
`patch_partition_check()` respectively.

This CL requires matching changes to OTA generation script (in the same
topic).

Bug: 110106408
Test: Run recovery_unit_test and recovery_component_test on marlin.
Test: `m dist` with non-A/B target. Verify
      /system/bin/install-recovery.sh on device.
Test: `m dist` with non-A/B target using BOARD_USES_FULL_RECOVERY_IMAGE.
      Verify /system/bin/install-recovery.sh on device.
Test: Install an incremental OTA with the new updater and scripts.
Change-Id: Ia34a90114bb227f4216eb478c22dc98c8194cb7f
2018-08-31 09:21:15 -07:00
Tao Bao
cdbe58a2a2 tests: Remove {old,new}.file.
They serve the same purpose as {boot,recovery}.img, except that they're
not structured to be imgdiff'd. Remove the two files and replace all the
uses with {boot,recovery}.img instead.

Bug: 110106408
Test: Run recovery_{unit,component}_test on marlin.
Change-Id: I8e71187d5b0c142ad932f33717f6fae364b43abc
2018-08-20 09:08:35 -07:00
Tao Bao
f8811bbd3a updater: Add TransferList class.
This would be the top-level class that represents and holds the info
parsed from a transfer list file.

Bug: 112151972
Test: Run recovery_unit_test and recovery_component_test on marlin.
Change-Id: I83b54df9d1411542eeeb8ef4a2db167e97f989c3
2018-08-17 09:37:26 -07:00
Tao Bao
3c8927390e updater: Add SourceInfo::{ReadAll,DumpBuffer,Overlaps}.
Bug: 112151972
Test: Run recovery_unit_test on marlin.
Change-Id: Ica2a7b3c768f5d8ca5d591a9560bca9f8ed847c5
2018-08-16 11:09:35 -07:00
Tianjie Xu
8f64bf635f Add the hash_tree_info class in Command
Add hash_tree_info to represent the hash tree computation arguments in
the transfer commands 'compute_hash_tree'. Also add its parsing code in
the Command class.

Bug: 25170618
Test: unit tests pass
Change-Id: Ie8607968377968e8fb3e58d1af0b8ca315e145be
2018-08-13 17:27:30 -07:00
Tianjie Xu
dbe4420325 Merge "Add an updater function to compute hash tree" 2018-08-06 22:19:04 +00:00
Tianjie Xu
69ffa15338 Add an updater function to compute hash tree
The new command is part of the transfer.list and allows us to compute the hash
tree on non-ab devices.

The required arguments for the hash_tree computation are:
  hash_tree_ranges
  source_ranges
  hash_algorithm
  salt_hex
  root_hash

Bug: 25170618
Test: unit tests pass;  run simulator with compute_hash_tree
Change-Id: I8ff0d582cc8adabb8a060db7845f38b35b28e62c
2018-08-06 12:17:50 -07:00
Jerry Zhang
b76af93ab5 recovery: Add ability to interrupt UI
Normally calling a UI method will block
indefinitely until the UI is actually
used. This creates a method to interrupt
the UI, causing waitKey to return -2. This
in turn, will cause ShowMenu to return -2.
This allows switching between recovery and
fastbootd via usb commands.

Test: adb shell /data/nativetest64/recovery_unit_test/recovery_unit_test
Bug: 78793464
Change-Id: I4c6c9aa18d79070877841a5c9818acf723fa6096
2018-07-30 20:17:27 +00:00
Tao Bao
1700cc46b5 Fix the arguments passed to getopt_long(3).
The getopt_long(3) implementation in Android (upstream freebsd) expects
a null-terminated array while parsing long options with required args.

  if (long_options[match].has_arg == required_argument) {
    optarg = nargv[optind++];
  }
  ...
  if (long_options[match].has_arg == required_argument && optarg == NULL) {
    return (BADARG);
  }

This seems to make sense in practice, as getopt(3) takes the first two
arguments of argc and argv that are "as passed to the main() function on
program invocation", and both of C and C++ spec say "the value of
argv[argc] shall be 0".

Prior to the CL, we may run into undefined behavior on malformed input
command line (e.g. missing arg for an option that requires one). This CL
fixes the issue by always appending a nullptr to the argument list (but
without counting that into argc).

Test: Build and boot into recovery with commands.
Change-Id: Ic6c37548f4db2f30aeabd40f387ca916eeca5392
2018-07-17 12:16:53 -07:00
Tao Bao
b1c5b62557 tests: Clean up the temporary dirs post-run.
TemporaryDir only deletes empty dirs (not done by its dtor because it
tries to keep the temporary files available on error exit).

Also change FreeCacheTest::MockFreeSpaceChecker to be static.

Test: Run recovery_unit_test on marlin. Check /data/local/tmp post-run.
Change-Id: I1bd54eb840e3094b4f22ee84c059eec2998773bf
2018-07-12 12:54:15 -07:00
Tao Bao
49750f15ed applypatch: Fix the return type of FreeSpaceForFile().
Prior to this CL, FreeSpaceForFile() was returning `size_t`, which may
overflow on ILP32 when called on a partition with 4GiB+ free space.
Additionally, it was returning static_cast<size_t>(-1) on error, but the
caller in freecache.cpp didn't check for that.

This CL changes its return type to `int64_t`, and moves the function
into freecache.cpp since there's no external caller.

Test: Run recovery_unit_test on marlin.
Test: Code search shows no external user of FreeSpaceForFile().
Change-Id: I00f501a057726e1f1ab69f367c46c77b30f2d774
2018-07-12 10:42:00 -07:00
Tao Bao
7c1d426dbc applypatch: Restrict applypatch_check to eMMC targets.
Also fix an error-pone behavior in previous code when verifying an eMMC
target. As long as it loads the partition content successfully according
to the SHAs embedded in the filename, it shouldn't further check against
the SHAs given in the second argument. Because the loaded contents
relate to a specific partition size.

For example:

  apply_patch_check(
      "EMMC:/boot.img:src_size:src_hash:tgt_size:tgt_hash",
      "src_hash");

Assume "/boot.img" already has the desired hash of "tgt_hash", the
previous code would give wrong verification result. The issue can be
addressed by additionally listing "tgt_hash" as one of the desired SHAs
(or by applying this CL).

Bug: 110106408
Test: Run recovery_unit_test and recovery_component_test on marlin.
Change-Id: I8daafdbecd083f687e24d563ab089caa25667633
2018-07-09 21:13:56 -07:00
Tao Bao
91a649ab62 updater: Add ABORT command.
This will be used for testing purpose only, replacing the previously
used "fail", to intentionally abort an update.

As we're separating the logic between commands parsing and execution,
"abort" needs to be considered as a valid command during the parsing.

Test: recovery_unit_test and recovery_component_test on marlin.
Change-Id: I47c41c423e62c41cc8515fd92f3c5959be08da02
2018-07-07 04:12:19 +00:00
Tao Bao
b8cb2e6322 tests: Split unit tests out of component/applypatch_test.cpp.
... into unit/applypatch_test.cpp. And rename the file to
component/applypatch_modes_test.cpp.

Bug: 110106408
Test: Run recovery_unit_test and recovery_component_test on marlin.
Change-Id: Ic23c4f054baa2fa0d5e8ea2fcffd22572f1f112e
2018-07-06 12:21:41 -07:00
Tao Bao
92f339372c updater: Check the number of args in Command::Parse.
Additionally checks for excess args when parsing ERASE, FREE, NEW, STASH
and ZERO. Note that the check for MOVE, BSDIFF, IMGDIFF has been covered
in Command::ParseTargetInfoAndSourceInfo.

Test: Run recovery_unit_test on marlin.
Change-Id: Ic8bc9b7a8dcf98f1f8db2e259607564508726857
2018-06-25 13:39:33 -07:00
Tao Bao
6a7e4af7c6 updater: Add Command parsing codes.
The added codes are not used in the updater yet. The switch will happen
in subsequent CLs.

Test: Run recovery_unit_test and recovery_component_test on marlin.
Change-Id: I1ae8a233280f02c2171b43ef028bdccdacb39c59
2018-06-25 13:39:29 -07:00
Tao Bao
51f16ec76d tests: Skip ScreenRecoveryUITest on gr_init failure.
It addresses the ScreenRecoveryUITest failures on gce targets which
don't have any graphics backend. Probing for all backend devices in
tests could work, but would duplicate codes. This CL relies on the
result of gr_init().

As a side effect, it may give false negatives if gr_init() is supposed
to work but silently broken. But such issues are beyond
ScreenRecoveryUITest's concern, which should be captured by the tests
for minui or graphics backends instead.

Fixes: 79616356
Test: Run recovery_unit_test on marlin.
Test: Run recovery_unit_test on gce.
Change-Id: I121aacc61c8a614447509506057ecfd8d86163e4
2018-06-13 23:28:21 -07:00
Tao Bao
94371fd012 ui: join only if joinable.
The threads in RecoveryUI only get initialized if their Init()s finish
successfully.

Test: recovery_unit_test on marlin.
Change-Id: Ic4b62300a3cbd47887d9f4a90dc26f8a7deab616
2018-06-06 07:49:47 -07:00
Tao Bao
42be0d47d9 tests: Specify the death test style to avoid flakiness.
As warned below (while running the test), the default death test style
(i.e. "fast") doesn't work well in a threaded context, which causes test
flakiness (timeout or early exit).

[WARNING] external/googletest/googletest/src/gtest-death-test.cc:836:: Death tests use fork(), which is unsafe particularly in a threaded context. For this test, Google Test detected 3 threads.

This CL specifies the death test styles to be "threadsafe" for the
following death tests.
- RangeSetTest.GetBlockNumber
- RangeSetTest.file_range
- ScreenRecoveryUITest.LoadAnimation_MissingAnimation

Test: mmma -j bootable/recovery
Test: Run recovery_unit_test on marlin. Test passes and the above
      warning is gone.
Change-Id: I245bbc09286702d5cb326f878c4391e842b66cc5
2018-06-05 14:06:59 -07:00
Tao Bao
b8634ca793 Merge "ui: Use std::thread to create input/progress threads." 2018-05-29 21:06:34 +00:00
Tao Bao
c3901231ce updater: Add Commmand class to manage BBOTA commands.
Move the commands map parsing out of PerformBlockImageUpdate(), as this
can be done more easily by the caller.

The goal (not done in this CL) is to decouple command parsing logic from
the performers. This allows (a) focusing on the command logic in the
performer; and (b) extending BBOTA commands syntax separately.

Test: Run recovery_unit_test and recovery_component_test.
Change-Id: Ife202398a7660b152d84a3ba17b90f93d19c55f2
2018-05-25 15:26:42 -07:00
Tao Bao
26ea9591bc ui: Use std::thread to create input/progress threads.
Test: Build and boot into recovery on walleye. Check the long press
      detection; `Run graphics test`.
Change-Id: Ic3e9b0652fc3ff6fb3ad118df5ebb9bb4abda2cd
2018-05-21 16:37:07 -07:00
Tao Bao
152e0eb20b wear_ui: Address a TODO regarding {intro,loop}_frames.
Also add tests for LoadAnimation that cover the change.

Test: Run `recovery_unit_test` on marlin.
Change-Id: I0380a5cdd0d85d55baecf7759eb647b6a9f3a085
2018-05-14 11:14:00 -07:00
Tao Bao
347a659d9b screen_ui: Fix an issue in RTL locale detection.
The CL in [1] moved android.os.RecoverySystem to send the locale
argument in well-formed BCP 47 language tags (e.g. "en-US" instead of
"en_US"), with the matching changes to recovery code in [2]. However,
the one in ScreenRecoveryUI::SetLocale() was missed, which broke RTL
locale detection when using new format.

[1] commit 38715228 in platform/frameworks/base
[2] commit 2078b22e in platform/bootable/recovery

Test: Set the locale to "ar-EG". `Run graphics test` under recovery.
      Check the progress bar.
Test: Run recovery_unit_test on marlin.
Change-Id: I7c7f5e0725bfb096109c7192c19f3f008e8e47e3
2018-05-08 17:56:33 -07:00
Tao Bao
6cd816859e tests: Add tests for ScreenRecoveryUI.
In order to support that, this CL adds Paths::set_resource_dir() to
override the default resource dir ("/res/images/") that's only available
under recovery. Note that since there're external modules depending on
libminui, it adds a separate function of res_set_resource_dir(), instead
of requiring the dependency on libotautil for everyone.

Test: mmma -j bootable/recovery
Test: Run recovery_unit_test on marlin.
Change-Id: I0a7dcf4476808bea9e634eaffc9676f6cbaf92b7
2018-05-08 15:53:56 -07:00
Tao Bao
17054c051a otautil: Rename dir/sys/thermal utils.
Test: mmma -j bootable/recovery
Change-Id: I32ab98549e91f993364306e4a88dc654221b3869
2018-05-03 23:17:29 -07:00
Tao Bao
1fe1afe863 Move menu headers/items to std::vector<std::string>.
Test: mmma -j bootable/recovery
Test: Run recovery_unit_test on marlin.
Test: Build and boot into recovery image on angler. Check the UI that
      shows menu ('View recovery log', 'Wipe data', 'Run locale test').
Test: Start recovery with '--prompt_and_wipe_data'. Check the UI.
Change-Id: If8a4209e0bb4ca64f719f9f9465d3b3589a69cdc
2018-05-03 12:31:18 -07:00
Tao Bao
e02a5b248b screen_ui: Merge Menu::Start() into its ctor.
Since we instantiate a Menu object each time for a given set of
header/items, we don't have a use case of re-populating an existing Menu
with different data (which is what Menu::Start() does).

Test: mmma -j bootable/recovery
Test: Run recovery_unit_test on marlin.
Test: Build and boot into recovery image on angler. Check the UI.
Change-Id: Iaa2ba9d406ebd74c015e43198c17c5335b38df53
2018-05-02 19:30:15 -07:00
Tianjie Xu
5fe5eb67ef Factor out a menu class for screen ui
Also consolidate the duplicate codes to draw the menu in ScreenRecoveryUI
and WearRecoveryUI. This helps us to support text icons as menu in the
future.

Bug: 74397117
Test: Check the menu under recovery on bullhead and a wear device.
Change-Id: Iba9b646c3828670f0e78a7e07d1a94a44e96bb0b
Merged-In: Iba9b646c3828670f0e78a7e07d1a94a44e96bb0b
2018-03-23 23:57:29 -07:00
Tao Bao
160514bf2b Load-balancing update_verifier worker threads.
Prior to this CL, the block verification works were assigned based on
the pattern of the ranges, which could lead to unbalanced workloads. This
CL adds RangeSet::Split() and moves update_verifier over.

a) For the following care_map.txt on walleye:
system
20,0,347,348,540,556,32770,33084,98306,98620,163842,164156,229378,229692,294914,295228,524289,524291,524292,524348,529059
vendor
8,0,120,135,32770,32831,94564,98304,98306

Measured the time costs prior to and with this CL with the following
script.

$ cat test_update_verifier.sh
  #!/bin/sh

  adb shell stop
  adb shell "cp /data/local/tmp/care_map.txt /data/ota_package/"
  for i in $(seq 1 50)
  do
    echo "Iteration: $i"
    adb shell "bootctl set-active-boot-slot 0"
    adb shell "echo 3 > /proc/sys/vm/drop_caches"
    adb shell "time /data/local/tmp/update_verifier"
    sleep 3
  done

Without this CL, the average time cost is 5.66s, while with the CL it's
reduced to 3.2s.

b) For the following care_map.txt, measured the performance on marlin:
system
18,0,271,286,457,8350,32770,33022,98306,98558,163842,164094,196609,204800,229378,229630,294914,295166,501547
vendor
10,0,42,44,85,2408,32770,32806,32807,36902,74242

It takes 12.9s and 5.6s without and with the CL respectively.

Fixes: 68553827
Test: recovery_unit_test
Test: Flash new build and trigger update_verifier. Check the balanced
      block verification.
Change-Id: I5fa4bf09a84e6b9b0975ee5f522724464181333f
2017-11-08 23:04:28 -08:00
Tao Bao
6798315327 otautil: Remove the aborts in RangeSet::Parse().
We used to CHECK and abort on parsing errors. While it works fine for
the updater use case (because recovery starts updater in a forked
process and collects the process exit code), it's difficult for other
clients to use RangeSet as a library (e.g. update_verifier).

This CL switches the aborts to returning empty RangeSet instead. Callers
need to check the parsing results explicitly.

The CL also separates RangeSet::PushBack() into a function, and moves
SortedRangeSet::Clear() into RangeSet.

Test: recovery_unit_test
Test: Sideload an OTA package with the new updater on angler.
Test: Sideload an OTA package with injected range string errors. The
      updater aborts from the explicit checks.
Change-Id: If2b7f6f41dc93af917a21c7877a83e98dc3fd016
2017-11-07 12:50:02 -08:00