Eric Seidel
8649c75206
* perf: mmap libapp.so out of the APK instead of buffering in RAM `open_base_lib` previously read the entire decompressed libapp.so into a Vec<u8> via `read_to_end` and handed bipatch a Cursor over that buffer. For large apps libapp.so can be tens of megabytes, and that allocation happens immediately after the patch download is buffered to disk — a plausible OOM trigger on memory-constrained devices (we have at least one customer report on OnePlus where the patch install appears to halt silently right after the download completes). Modern AGP (3.6+) defaults to extractNativeLibs=false, which keeps libapp.so STORED uncompressed inside the APK so the dynamic linker can mmap it directly. When that's the case, do the same: find the entry's data offset via the zip crate, drop the archive, reopen the APK, and mmap the entry's slice. Cursor<Mmap> implements Read + Seek, which is what bipatch's `Reader::new(patch, base)` requires. When the entry isn't stored uncompressed (older builds, or builds that explicitly compress native libs), fall back to the previous buffered read so we always succeed. Mmap doesn't change the peak working set when bipatch traverses the whole base linearly, but file-backed mappings are clean and reclaimable under memory pressure where an anonymous Vec is not, and we avoid the ~2x transient allocation peak from `read_to_end` growing the buffer. Tests cover both paths (stored → mmap, deflated → buffered) on the host. * ci: add mmap, memmap, SIGBUS to cspell dictionary
99 lines
1.3 KiB
YAML
99 lines
1.3 KiB
YAML
$schema: https://raw.githubusercontent.com/streetsidesoftware/cspell/main/cspell.schema.json
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version: "0.2"
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ignorePaths:
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- target
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- build
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- "**/*.g.dart"
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# Flutter platform directories with per-platform build files
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- windows
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- macos
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- linux
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- ios
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- android
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words:
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- aarch
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- androideabi
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- apks
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- armeabi
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- armv7
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- autogen
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- bidiff
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- bipatch
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- bootable
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- buildlog
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- buildroot
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- bundletool
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- carryforward
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- cbindgen
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- cdylib
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- classpath
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- clippy
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- codegen
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- comde
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- compatch
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- Condvar
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- datadir
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- debuginfo
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- declspec
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- Decompressor
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- dllexport
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- dlopen
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- EDQUOT
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- EACCES
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- embedders
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- EOCD
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- endtemplate
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- ENOSPC
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- EROFS
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- eseidel
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- ffigen
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- gclient
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- hdpi
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- ifdef
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- libapp
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- libc
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- libflutter
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- libupdater
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- logcat
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- memmap
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- mmap
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- mockall
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- mocktail
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- msvc
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- nscloud
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- oslog
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- pubspec
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- repr
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- reqwest
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- rlib
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- rsplit
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- rollouts
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- RTLD
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- rustflags
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- rustls
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- rustup
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- serde
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- shorebirdtech
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- SIGBUS
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- sigstore
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- staticlib
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- subosito
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- swiftpm
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- symbolication
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- ureq
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- unbootable
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- unbooted
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- unreviewable
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- unwritable
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- usize
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- Swatinem
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- taiki
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- Verdana
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- vmcode
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- withf
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- xlink
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- zstandard
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- zstd
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- xcodeproj
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- pbxproj
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