[lldb][android] #12042
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[lldb][android] #12042
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…#159676) Reattempt at llvm#145382 (cc @labath). This time setenv() was replaced with set_env() (llvm#145382 (comment)). --------- Co-authored-by: Chad Smith <[email protected]> (cherry picked from commit 223cfa8)
## Bug
Trying to attach to an android process by name fails:
```
(lldb) process attach -n com.android.bluetooth
error: attach failed: could not find a process named com.android.bluetooth
```
## Root Cause
PlatformAndroid does not implement the `FindProcesses` method.
As described in `include/lldb/Target/Platform.h`:
```
// The base class Platform will take care of the host platform. Subclasses
// will need to fill in the remote case.
virtual uint32_t FindProcesses(const ProcessInstanceInfoMatch &match_info,
ProcessInstanceInfoList &proc_infos);
```
## Fix
Implement the `FindProcesses` method in PlatformAndroid. Use adb to get
the pid of the process name on the device with the adb client connection
using `adb shell pidof <name>`.
## Reproduce
With an android device connected, run the following
Install and start lldb-server on device
```
adb push lldb-server /data/local/tmp/
adb shell chmod +x /data/local/tmp/lldb-server
adb shell /data/local/tmp/lldb-server platform --listen 127.0.0.1:9500 --server
```
Start lldb, and run
```
platform select remote-android
platform connect connect://127.0.0.1:9500
log enable lldb platform
```
Connect to the process by name:
```
process attach -n com.android.bluetooth
```
## Test Plan
Before:
```
(lldb) process attach -n com.android.bluetooth
error: attach failed: could not find a process named com.android.bluetooth
```
After:
```
(lldb) process attach -n com.android.bluetooth
lldb AdbClient::ResolveDeviceID Resolved device ID: 127.0.0.1
lldb AdbClient::AdbClient(device_id='127.0.0.1') - Creating AdbClient with device ID
lldb Connecting to ADB server at connect://127.0.0.1:5037
lldb Connected to Android device "127.0.0.1"
lldb Forwarding remote TCP port 38315 to local TCP port 35243
lldb AdbClient::~AdbClient() - Destroying AdbClient for device: 127.0.0.1
lldb gdbserver connect URL: connect://127.0.0.1:35243
lldb AdbClient::AdbClient(device_id='127.0.0.1') - Creating AdbClient with device ID
lldb Connecting to ADB server at connect://127.0.0.1:5037
lldb Selecting device: 127.0.0.1
lldb PlatformAndroid::FindProcesses found process 'com.android.bluetooth' with PID 2223
lldb AdbClient::~AdbClient() - Destroying AdbClient for device: 127.0.0.1
llvm-worker-48 PlatformRemoteGDBServer::GetModuleSpec - got module info for (/apex/com.android.art/lib64/libc++.so:aarch64-unknown-linux-android) : file = '/apex/com.android.art/lib64/libc++.so', arch = aarch64-unknown-linux-android, uuid = 552995D0-A86D-055F-1F03-C13783A2A16C, object size = 754128
llvm-worker-9 PlatformRemoteGDBServer::GetModuleSpec - got module info for (/apex/com.android.art/lib64/liblzma.so:aarch64-unknown-linux-android) : file = '/apex/com.android.art/lib64/liblzma.so', arch = aarch64-unknown-linux-android, uuid = E51CAC98-666F-6C3F-F605-1498079542E0, object size = 179944
Process 2223 stopped
```
(cherry picked from commit a19c9a8)
…HostInfo' (llvm#163075) This should fix llvm#163050 (comment) Thank you for tagging me @trcrsired! ``` [105/1932] Building CXX object tools/lldb/source/Plugins/Platfor...d/CMakeFiles/lldbPluginPlatformAndroid.dir/PlatformAndroid.cpp. FAILED: [code=1] tools/lldb/source/Plugins/Platform/Android/CMakeFiles/lldbPluginPlatformAndroid.dir/PlatformAndroid.cpp.o /home/cqwrteur/toolchains/llvm/x86_64-linux-gnu/llvm/bin/clang++ --target=aarch64-linux-android30 --sysroot=/home/cqwrteur/toolchains/llvm/aarch64-linux-android30/aarch64-linux-android30 -DGTEST_HAS_RTTI=0 -DHAVE_ROUND -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/cqwrteur/toolchains_build/toolchainbuildscripts/llvm/.artifacts/llvm/aarch64-linux-android30/llvm/tools/lldb/source/Plugins/Platform/Android -I/home/cqwrteur/toolchains_build/llvm-project/lldb/source/Plugins/Platform/Android -I/home/cqwrteur/toolchains_build/llvm-project/lldb/include -I/home/cqwrteur/toolchains_build/toolchainbuildscripts/llvm/.artifacts/llvm/aarch64-linux-android30/llvm/tools/lldb/include -I/home/cqwrteur/toolchains_build/toolchainbuildscripts/llvm/.artifacts/llvm/aarch64-linux-android30/llvm/include -I/home/cqwrteur/toolchains_build/llvm-project/llvm/include -I/home/cqwrteur/toolchains_build/llvm-project/llvm/../clang/include -I/home/cqwrteur/toolchains_build/toolchainbuildscripts/llvm/.artifacts/llvm/aarch64-linux-android30/llvm/tools/lldb/../clang/include -I/home/cqwrteur/toolchains_build/llvm-project/lldb/source -I/home/cqwrteur/toolchains_build/toolchainbuildscripts/llvm/.artifacts/llvm/aarch64-linux-android30/llvm/tools/lldb/source -isystem /home/cqwrteur/toolchains/llvm/aarch64-linux-android30/aarch64-linux-android30/usr/include/libxml2 -fuse-ld=lld -fuse-lipo=llvm-lipo -flto=thin -Wno-unused-command-line-argument -rtlib=compiler-rt -stdlib=libc++ --unwindlib=libunwind -lc++abi -stdlib=libc++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -flto=thin -Wno-unknown-pragmas -Wno-strict-aliasing -Wno-vla-extension -O3 -DNDEBUG -std=c++17 -fPIC -fno-exceptions -funwind-tables -fno-rtti -MD -MT tools/lldb/source/Plugins/Platform/Android/CMakeFiles/lldbPluginPlatformAndroid.dir/PlatformAndroid.cpp.o -MF tools/lldb/source/Plugins/Platform/Android/CMakeFiles/lldbPluginPlatformAndroid.dir/PlatformAndroid.cpp.o.d -o tools/lldb/source/Plugins/Platform/Android/CMakeFiles/lldbPluginPlatformAndroid.dir/PlatformAndroid.cpp.o -c /home/cqwrteur/toolchains_build/llvm-project/lldb/source/Plugins/Platform/Android/PlatformAndroid.cpp /home/cqwrteur/toolchains_build/llvm-project/lldb/source/Plugins/Platform/Android/PlatformAndroid.cpp:66:48: error: use of undeclared identifier 'HostInfo' 66 | default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture()); | ^ 1 error generated. [118/1932] Linking CXX shared library lib/libLLVMAnalysis.so.22.0git ninja: build stopped: subcommand failed. llvm: Ninja build failed for aarch64-linux-android30 ``` (cherry picked from commit 55b0d14)
## Summary
Fix `FindProcesses` to respect Android's `hidepid=2` security model and
enable name matching for Android apps.
## Problem
1. Called `adb shell pidof` or `adb shell ps` directly, bypassing
Android's process visibility restrictions
2. Name matching failed for Android apps - searched for
`com.example.myapp` but GDB Remote Protocol reports `app_process64`
Android apps fork from Zygote, so `/proc/PID/exe` points to
`app_process64` for all apps. The actual package name is only in
`/proc/PID/cmdline`. The previous implementation applied name filters
without supplementing with cmdline, so searches failed.
## Fix
- Delegate to lldb-server via GDB Remote Protocol (respects `hidepid=2`)
- Get all visible processes, supplement zygote/app_process entries with
cmdline, then apply name matching
- Only fetch cmdline for zygote apps (performance), parallelize with
`xargs -P 8`
- Remove redundant code (GDB Remote Protocol already provides GID/arch)
## Test Results
### Before this fix:
```
(lldb) platform process list
error: no processes were found on the "remote-android" platform
(lldb) platform process list -n com.example.hellojni
1 matching process was found on "remote-android"
PID PARENT USER TRIPLE NAME
====== ====== ========== ============================== ============================
5276 359 u0_a192 com.example.hellojni
^^^^^^^^ Missing triple!
```
### After this fix:
```
(lldb) platform process list
PID PARENT USER TRIPLE NAME
====== ====== ========== ============================== ============================
1 0 root aarch64-unknown-linux-android init
2 0 root [kthreadd]
359 1 system aarch64-unknown-linux-android app_process64
5276 359 u0_a192 aarch64-unknown-linux-android com.example.hellojni
5357 5355 u0_a192 aarch64-unknown-linux-android sh
5377 5370 u0_a192 aarch64-unknown-linux-android lldb-server
^^^^^^^^ User-space processes now have triples!
(lldb) platform process list -n com.example.hellojni
1 matching process was found on "remote-android"
PID PARENT USER TRIPLE NAME
====== ====== ========== ============================== ============================
5276 359 u0_a192 aarch64-unknown-linux-android com.example.hellojni
(lldb) process attach -n com.example.hellojni
Process 5276 stopped
* thread llvm#1, name = 'example.hellojni', stop reason = signal SIGSTOP
```
## Test Plan
With an Android device/emulator connected:
1. Start lldb-server on device:
```bash
adb push lldb-server /data/local/tmp/
adb shell chmod +x /data/local/tmp/lldb-server
adb shell /data/local/tmp/lldb-server platform --listen 127.0.0.1:9500 --server
```
2. Connect from LLDB:
```
(lldb) platform select remote-android
(lldb) platform connect connect://127.0.0.1:9500
(lldb) platform process list
```
3. Verify:
- `platform process list` returns all processes with triple information
- `platform process list -n com.example.app` finds Android apps by
package name
- `process attach -n com.example.app` successfully attaches to Android
apps
## Impact
Restores `platform process list` on Android with architecture
information and package name lookup. All name matching modes now work
correctly.
Fixes llvm#164192
(cherry picked from commit f8cb6cd)
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next.It would be nice to merge this in
swift/release/6.3as well.