idmap2: assign uninitialized variables initial values

In C++, local primitives are not automatically initialized:

  void foo() {
    int i;         // primitive: value is indeterminate
    std::string s; // class: calls default ctor
    ...
  }

Create.cpp and Dump.cpp include this type of uninitialized variable; fix
this by explicitly assigning an initial value.

Also add a new script to help catch these types of errors in the future:
valgrind.sh, which will run a few idmap2 commands and the idmap2_tests
through Valgrind.

Also update static-checks.sh to rely on a command's return value instead
of the presence of any output.

Test: frameworks/base/cmds/idmap2/valgrind.sh
Change-Id: Ic9dbd3e9a768beb39ac677ff294b0fca5ee8f9d2

cmds/idmap2/idmap2/Create.cpp

@@ -50,7 +50,7 @@ Result<Unit> Create(const std::vector<std::string>& args) {
   std::string overlay_apk_path;
   std::string idmap_path;
   std::vector<std::string> policies;
-  bool ignore_overlayable;
+  bool ignore_overlayable = false;
 
   const CommandLineOptions opts =
       CommandLineOptions("idmap2 create")

cmds/idmap2/idmap2/Dump.cpp

@@ -39,7 +39,7 @@ using android::idmap2::Unit;
 Result<Unit> Dump(const std::vector<std::string>& args) {
   SYSTRACE << "Dump " << args;
   std::string idmap_path;
-  bool verbose;
+  bool verbose = false;
 
   const CommandLineOptions opts =
       CommandLineOptions("idmap2 dump")

cmds/idmap2/static-checks.sh

@@ -27,10 +27,11 @@ function _eval()
     local red="\e[31m"
     local green="\e[32m"
     local reset="\e[0m"
+    local output
 
     _log "${green}[ RUN      ]${reset} ${label}"
-    local output="$(eval "$cmd")"
-    if [[ -z "${output}" ]]; then
+    output="$(eval "$cmd" 2>&1)"
+    if [[ $? -eq 0 ]]; then
         _log "${green}[       OK ]${reset} ${label}"
         return 0
     else

cmds/idmap2/valgrind.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+#
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+function _log()
+{
+    echo -e "$*" >&2
+}
+
+function _eval()
+{
+    local label="$1"
+    local cmd="$2"
+    local red="\e[31m"
+    local green="\e[32m"
+    local reset="\e[0m"
+    local output
+
+    _log "${green}[ RUN      ]${reset} ${label}"
+    output="$(eval "$cmd" 2>&1)"
+    if [[ $? -eq 0 ]]; then
+        _log "${green}[       OK ]${reset} ${label}"
+        return 0
+    else
+        echo "${output}"
+        _log "${red}[  FAILED  ]${reset} ${label}"
+        errors=$((errors + 1))
+        return 1
+    fi
+}
+
+errors=0
+script="$(readlink -f "$BASH_SOURCE")"
+prefix="$(dirname "$script")"
+target_path="${prefix}/tests/data/target/target.apk"
+overlay_path="${prefix}/tests/data/overlay/overlay.apk"
+idmap_path="/tmp/a.idmap"
+valgrind="valgrind --error-exitcode=1 -q --track-origins=yes --leak-check=full"
+
+_eval "idmap2 create" "$valgrind idmap2 create --policy public --target-apk-path $target_path --overlay-apk-path $overlay_path --idmap-path $idmap_path"
+_eval "idmap2 dump" "$valgrind idmap2 dump --idmap-path $idmap_path"
+_eval "idmap2 lookup" "$valgrind idmap2 lookup --idmap-path $idmap_path --config '' --resid test.target:string/str1"
+_eval "idmap2 scan" "$valgrind idmap2 scan --input-directory ${prefix}/tests/data/overlay --recursive --target-package-name test.target --target-apk-path $target_path --output-directory /tmp --override-policy public"
+_eval "idmap2 verify" "$valgrind idmap2 verify --idmap-path $idmap_path"
+_eval "idmap2_tests" "$valgrind $ANDROID_HOST_OUT/nativetest64/idmap2_tests/idmap2_tests"
+exit $errors