Allow for overlaying dynamic shared libraries
Overlays targeting shared libraries should be loaded into the
resources of every target that depends on the shared library.
Static shared libraries are currently not supported because overlays
should override all versions of static shared libraries and there is
not currently support for an overlay targeting multiple APKs.
Also created a test instrumentation and host test suite for testing
overlays and packages on the system image.
Bug: 140790224
Test: atest OverlayRemountedTest
Change-Id: I20a217b6368d6cf92b2b9f46908fd58012933f72
diff --git a/cmds/idmap2/libidmap2/ResourceMapping.cpp b/cmds/idmap2/libidmap2/ResourceMapping.cpp
index 229628c..4074789 100644
--- a/cmds/idmap2/libidmap2/ResourceMapping.cpp
+++ b/cmds/idmap2/libidmap2/ResourceMapping.cpp
@@ -33,6 +33,8 @@
namespace {
+#define REWRITE_PACKAGE(resid, package_id) \
+ (((resid)&0x00ffffffU) | (((uint32_t)(package_id)) << 24U))
#define EXTRACT_PACKAGE(resid) ((0xff000000 & (resid)) >> 24)
std::string ConcatPolicies(const std::vector<std::string>& policies) {
@@ -154,6 +156,7 @@
return Error("root element is not <overlay> tag");
}
+ const uint8_t target_package_id = target_package->GetPackageId();
const uint8_t overlay_package_id = overlay_package->GetPackageId();
auto overlay_it_end = root_it.end();
for (auto overlay_it = root_it.begin(); overlay_it != overlay_it_end; ++overlay_it) {
@@ -187,6 +190,9 @@
continue;
}
+ // Retrieve the compile-time resource id of the target resource.
+ target_id = REWRITE_PACKAGE(target_id, target_package_id);
+
if (overlay_resource->dataType == Res_value::TYPE_STRING) {
overlay_resource->data += string_pool_offset;
}
@@ -214,6 +220,7 @@
const AssetManager2* target_am, const AssetManager2* overlay_am,
const LoadedPackage* target_package, const LoadedPackage* overlay_package) {
ResourceMapping resource_mapping;
+ const uint8_t target_package_id = target_package->GetPackageId();
const auto end = overlay_package->end();
for (auto iter = overlay_package->begin(); iter != end; ++iter) {
const ResourceId overlay_resid = *iter;
@@ -225,11 +232,14 @@
// Find the resource with the same type and entry name within the target package.
const std::string full_name =
base::StringPrintf("%s:%s", target_package->GetPackageName().c_str(), name->c_str());
- const ResourceId target_resource = target_am->GetResourceId(full_name);
+ ResourceId target_resource = target_am->GetResourceId(full_name);
if (target_resource == 0U) {
continue;
}
+ // Retrieve the compile-time resource id of the target resource.
+ target_resource = REWRITE_PACKAGE(target_resource, target_package_id);
+
resource_mapping.AddMapping(target_resource, Res_value::TYPE_REFERENCE, overlay_resid,
/* rewrite_overlay_reference */ false);
}