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| author | Colin Cross <ccross@android.com> | 2018-05-17 16:11:53 -0700 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2018-05-17 16:17:28 -0700 |
| commit | 18f368560090619bb4284a408262feb86c747002 (patch) | |
| tree | 48f57ae54016bd7645990fb1f95f5cc7f8d5097e /libmemunreachable | |
| parent | 3464bc4b439e01244c0a6b5f35e8e949e0f16096 (diff) | |
| download | system_core-18f368560090619bb4284a408262feb86c747002.tar.gz system_core-18f368560090619bb4284a408262feb86c747002.tar.bz2 system_core-18f368560090619bb4284a408262feb86c747002.zip | |
Document using libmemunreachable on an app
Document dumpsys meminfo --unreachable, and how to enable
malloc_debug backtraces on a single app.
Test: none
Change-Id: I649afdfff1c7438f74950395639b06c39cae3ca0
Diffstat (limited to 'libmemunreachable')
| -rw-r--r-- | libmemunreachable/README.md | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libmemunreachable/README.md b/libmemunreachable/README.md index ae8fa94b3..6d9141a5f 100644 --- a/libmemunreachable/README.md +++ b/libmemunreachable/README.md @@ -12,6 +12,27 @@ In the default (zero-overhead) mode, the returned data on leaks is limited to th Usage ------- +### In Android apps ### + +libmemunreachble is loaded by zygote and can be triggered with `dumpsys -t 600 meminfo --unreachable [process]`. + +To enable malloc\_debug backtraces on allocations for a single app process on a userdebug device, use: +``` +adb root +adb shell setprop libc.debug.malloc.program app_process +adb shell setprop wrap.[process] "\$\@" +adb shell setprop libc.debug.malloc.options backtrace=4 +``` + +Kill and restart the app, trigger the leak, and then run `dumpsys -t 600 meminfo --unreachable [process]`. + +To disable malloc\_debug: +``` +adb shell setprop libc.debug.malloc.options "''" +adb shell setprop libc.debug.malloc.program "''" +adb shell setprop wrap.[process] "''" +``` + ### C interface ### #### `bool LogUnreachableMemory(bool log_contents, size_t limit)` #### |