Add a mandatory option in imgdiff to write the split info (i.e.
patch_size, tgt_size, src_ranges) to file when handling large apks.
Therefore, the caller of imgdiff can create split transfers based on
the info.
Bug: 63542719
Test: unit tests pass
Change-Id: I853d55d1f999fd576474faa81077f7307f4d856d
Due to the cache size limit for OTA generation, we used to split large
zip files linearly into pieces and do bsdiff on them. As a result, i) we
lose the advantage of imgdiff; ii) if there's an accidental order change
of some huge files inside the zip, we'll create an insanely large patch.
This patch splits the src&tgt more smartly based on the zip entry_name.
If the entry_name is empty or no matching source is found for a target
chunk, we'll skip adding its source and later do a bsdiff against the
whole split source image (this rarely happens in our use cases except
for the metadata inside a ziparchive).
After the split, the target pieces are continuous and block aligned,
while the sources pieces are mutually exclusive. (Some of the source
blocks may not be used if there's no matching entry_name in the target.)
Then we will generate patches accordingly between each split image
pairs.
Afterwards, if we apply imgpatch to each pair of split source/target
images and add up the patched result, we can get back the original
target image.
For example:
Input: [src_image, tgt_image]
Split: [src-0,tgt-0; src-1,tgt-1, src-2,tgt-2]
Diff: [ patch-0; patch-1; patch-2]
Patch: [(src-0,patch-0)=tgt-0; (src-1,patch-1)=tgt-1;
(src-2,patch-2)=tgt-2;]
Append: [tgt-0 + tgt-1 + tgt-2 = tgt_image]
Peformance:
For the small package in b/34220646, we decrease the patch size of
chrome.apk dramatically from 30M to 400K due to the order change of
two big .so files.
On two versions of angler, I also observe decent patch size decrease.
For chrome.apk, we reduced the size from 5.9M to 3.2M; and for
vevlet.apk from 8.0M to 6.5M.
Bug: 34220646
Test: recovery component test && apply imgdiff & imgpatch on two
chrome.apk
Change-Id: I145d802984fa805efbbac9d01a2e64d82ef9728b
1. Move the declaration of the Image classes to the header file to make
testing easier.
2. Also move rangeset.h to bootable/recovery to allow access in imgdiff.
Test: recovery component test
Change-Id: I68a863e60a3f2e7ae46ee48f48eb15391f5f4330
This way we can keep the input images const when calling
genetatepatches().
Test: recovery component test; diff and patch on chrome.apk; generate
recovery-from-boot.p for angler.
Change-Id: I65b5689b88f6719c6ede46bb82def0c4caeb8a61
This helps us to add a new mode to handle large APKs in the follow
up CL.
Changes include:
1. Create a new interface class 'Image'
1. Create subclasses 'ZipModeImage' and 'ImageModeImage' and move the
related functions there.
Bug: 63542719
Test: recovery_component_test passes
Change-Id: I7729b0ba39b19a9c84811636a60dd0a0b1acc2f0
In a rare case, a random chunk will pass both the gzip header check
and the inflation process; but fail the uncompressed length check in the
footer. This leads to a imgdiff failure. So, we should treat this chunk
as 'normal' instead of 'inflated' while generating the patch.
Bug: 63334984
Test: imgdiff generates patch successfully on previous failing images.
Change-Id: Ice84f22d3653bce9756bda91e70528c0d2f264a0
Also remove the utils in applypatch and replace them with the
corresponding libbase functions.
Test: recovery tests pass.
Change-Id: I77254c141bd3e7d3d6894c23b60e866009516f81
Put ImageChunk and some helper functions into a class. Also switch to
using std::vector instead of malloc.
Bug: 18606652
Test: imgdiff_test passed on host. Also generate a complete incremental OTA package.
The file content is the same and time consumption is similar.
Change-Id: Id603ada4e130ef521218400761a119001a86ca79
In zip mode, if a chunk is not deflate or its filename can't be found
in source chunks, the entire source file is used as old data for bsdiff,
To avoid repeatedly construct the suffix array used by bsdiff, we cache
the suffix array of the entire source file.
Bug: 34281147
Test: =time -v imgdiff -z Chrome-ORF74B.apk Chrome-ORF76B.apk Chrome.imgdiff
Change-Id: Ifd957ccecf7226fcb44dbf28c58969a06ef74f4b
When the input image ends with the magic value sequence of 0x1f, 0x8b,
0x0b (optionally with 0x00), the image parsing code will be stuck in an
infinite loop.
Test: recovery_component_test passes.
Change-Id: Ie3629dfdc41360387b19cc3e0359c95ae4fb998e
Factor out libimgdiff static library for testing purpose.
This CL adds the imgdiff tests on host and on target both (similar to
libimgpatch). In practice, we only need imgdiff binary on host, and
libimgpatch on target. But they should build and pass tests on both
platforms.
Test: recovery_host_test passes; recovery_component_test passes.
Change-Id: I0eafb7faf727cdf70066310e845af6ee245d4f60
bootable/recovery/applypatch/imgdiff.cpp:195:5: warning: Potential leak
of memory pointed to by 'img' [clang-analyzer-unix.Malloc]
Bug: 26936282
Test: WITH_TIDY=1 WITH_STATIC_ANALYZER=1 mm
Change-Id: Ie79c780233ddfebf85686a24df3bf2561f831580
bootable/recovery/applypatch/imgdiff.cpp:322:11: warning: Value stored to 'ret' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
bootable/recovery/applypatch/imgdiff.cpp:447:11: warning: Value stored to 'ret' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
bootable/recovery/applypatch/imgdiff.cpp:553:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
Bug: 26936282
Test: WITH_TIDY=1 WITH_STATIC_ANALYZER=1 mm
Change-Id: I3f865e3e9b9d19e5ea5e8dfd2fe2c644254ffbb5
static_cast is preferable to reinterpret_cast when casting from void*
pointers returned by malloc/calloc/realloc/mmap calls.
Discovered while looking at compiler warnings (b/26936282).
Test: WITH_TIDY=1 WITH_STATIC_ANALYZER=1 mma
Change-Id: Iaffd537784aa857108f6981fdfd82d0496eb5592
Merged-In: I151642d5a60c94f312d0611576ad0143c249ba3d
bootable/recovery/applypatch/imgdiff.cpp:1065:3: warning: Potential leak of memory pointed to by 'patch_data'
bootable/recovery/applypatch/imgdiff.cpp:1065:3: warning: Potential leak of memory pointed to by 'patch_size'
bootable/recovery/applypatch/imgdiff.cpp:226:7: warning: Potential leak of memory pointed to by 'temp_entries'
Bug: 26936282
Test: WITH_TIDY=1 WITH_STATIC_ANALYZER=1 mm
Change-Id: I3cac945d7677d367934d5619ef7419daf6f48d6f
external/bsdiff uses divsufsort which is much faster, and also include
some bug fixes.
Bug: 26982501
Test: ./imgdiff_test.sh
Change-Id: I089a301c291ee55d79938c7a3ca6d509895440d1
Treat it as a normal chunk if inflate() fails.
Test: run imgdiff on corrupted gzip and apply the patch
Bug: 27153028
Change-Id: Idcbb3c1360ec0774e6c7861b21d99af8ee10604a
dragon kernel is compressed via lz4 for boot speed and bootloader
support reasons and recent prebuilts happen to include the gzip header
sequence which is causing imgdiff to fail.
Detect a spurious gzip header and treat the section as a normal section.
Bug: 26133184
Change-Id: I369d7d576fd7d2c579c0780fc5c669a5b6ea0d3d
(cherry picked from commit 0f2f6a746af517afca9e5e089a4a17be0a9766d6)
Signed-off-by: David Riley <davidriley@google.com>
mkstemp() allocates a file description that is never released. If
MakePatch() is called too many time, imgdiff reaches the Operating
System EMFILE (too many open files) limit.
Change-Id: Icbe1399f6f6d32cfa1830f879cacf7d75bbd9fc3
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Signed-off-by: Gaelle Nassiet <gaellex.nassiet@intel.com>
