Merge "Add kernel memory allocations to bugreport" into main am: 7e6edf5

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/3406679

Change-Id: Ie44beb3d8ab34f9c4ed14a9927b8889f1c7b5afe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

Author: Treehugger Robot

cmds/dumpstate/Android.bp

@@ -128,6 +128,7 @@ cc_binary {
         "main.cpp",
     ],
     required: [
+        "alloctop",
         "atrace",
         "bugreport_procdump",
         "dmabuf_dump",

cmds/dumpstate/dumpstate.cpp

@@ -1257,6 +1257,15 @@ static void DumpIpAddrAndRules() {
     RunCommand("IP RULES v6", {"ip", "-6", "rule", "show"});
 }
 
+static void DumpKernelMemoryAllocations() {
+    if (!access("/proc/allocinfo", F_OK)) {
+        // Print the top 100 biggest memory allocations of at least one byte.
+        // The output is sorted by size, descending.
+        RunCommand("KERNEL MEMORY ALLOCATIONS",
+                   {"alloctop", "--once", "--sort", "s", "--min", "1", "--lines", "100"});
+    }
+}
+
 static Dumpstate::RunStatus RunDumpsysTextByPriority(const std::string& title, int priority,
                                                      std::chrono::milliseconds timeout,
                                                      std::chrono::milliseconds service_timeout) {
@@ -1766,6 +1775,8 @@ Dumpstate::RunStatus Dumpstate::dumpstate() {
 
     DoKmsg();
 
+    DumpKernelMemoryAllocations();
+
     DumpShutdownCheckpoints();
 
     DumpIpAddrAndRules();