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add GosCompatMemoryTests #361

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34 changes: 34 additions & 0 deletions tests/GosCompatTests/GosCompatMemoryTests/Android.bp
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cc_binary {
name: "goscompat_smaps_native_runner",
srcs: [
"native/simple_smaps_parser.cpp",
"native/smaps_parser_native_runner.cpp",
],
local_include_dirs: [
"native",
],
cflags: [
"-std=c++17",
"-Wall",
"-Wextra",
"-Werror",
"-fexceptions",
],
stl: "c++_static",
}

java_test_host {
name: "GosCompatMemoryTests",
srcs: [
"host/src/**/*.java",
":libtombstone_proto-src",
],
libs: [
"tradefed",
],
device_first_data: [
":goscompat_smaps_native_runner",
],
test_config: "NativeAndroidTest.xml",
test_suites: ["general-tests"],
}
11 changes: 11 additions & 0 deletions tests/GosCompatTests/GosCompatMemoryTests/NativeAndroidTest.xml
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<?xml version="1.0" encoding="utf-8"?>
<configuration description="Runs GosCompatMemoryTests">
<target_preparer class="com.android.tradefed.targetprep.PushFilePreparer">
<option name="cleanup" value="true" />
<option name="push" value="goscompat_smaps_native_runner->/data/local/tmp/goscompat_smaps_native_runner" />
</target_preparer>

<test class="com.android.tradefed.testtype.HostTest">
<option name="jar" value="GosCompatMemoryTests.jar" />
</test>
</configuration>
12 changes: 12 additions & 0 deletions tests/GosCompatTests/GosCompatMemoryTests/README.md
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# GosCompatMemoryTests

`GosCompatMemoryTests` is a compatibility test for memory allocator usage in apps.

## SmapsNativeHostTest

This tests streams `/proc/self/smaps` (a live walk of the process VMA tree) while allocating
retained parser objects, and hardened_malloc turns that allocation pattern into many allocator VMAs.
Because the live `/proc/self/smaps` walk can see those newly-created VMAs, the parser can start
parsing mappings created by its own parsing work, leading to a loop of allocations and eventually an
out-of-memory error. The tests will fail when a very high limit on number of VMA records parsed is
reached.
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