ART: Native support for multidex

Native support for zip files with multiple classesX.dex.

Works by explicitly looking for those files in ascending order. As
these files have no file system representation for themselves,
introduce synthetic dex locations: the name of the originating file
plus a colon plus the name of the dex file, e.g., test.jar:classes2.dex.

Opening a zip dex file will return all dex files in this way. This
keeps the changes to dex2oat minimal.

To hide multidex/synthetic names from the Java layer, let the handle
of dalvik.system.DexFile refer to a vector of DexFile objects. When
opening a location, test possible synthetic names and add them to the
vector. Thus, the original multidex jar in the classpath will be
associated with all embedded dex files.

Change-Id: I0de107e1369cbc94416c544aca3b17525c9eac8b

1 files changed, 17 insertions, 2 deletions

diff --git a/runtime/dex_file_verifier_test.cc b/runtime/dex_file_verifier_test.cc
index d0ce00f..93faeae 100644
--- a/runtime/dex_file_verifier_test.cc
+++ b/runtime/dex_file_verifier_test.cc
@@ -115,7 +115,14 @@ static const DexFile* OpenDexFileBase64(const char* base64, const char* location
 
   // read dex file
   ScopedObjectAccess soa(Thread::Current());
-  return DexFile::Open(location, location, error_msg);
+  std::vector<const DexFile*> tmp;
+  bool success = DexFile::Open(location, location, error_msg, &tmp);
+  CHECK(success) << error_msg;
+  EXPECT_EQ(1U, tmp.size());
+  const DexFile* dex_file = tmp[0];
+  EXPECT_EQ(PROT_READ, dex_file->GetPermissions());
+  EXPECT_TRUE(dex_file->IsReadOnly());
+  return dex_file;
 }
 
 
@@ -170,7 +177,15 @@ static const DexFile* FixChecksumAndOpen(byte* bytes, size_t length, const char*
 
   // read dex file
   ScopedObjectAccess soa(Thread::Current());
-  return DexFile::Open(location, location, error_msg);
+  std::vector<const DexFile*> tmp;
+  if (!DexFile::Open(location, location, error_msg, &tmp)) {
+    return nullptr;
+  }
+  EXPECT_EQ(1U, tmp.size());
+  const DexFile* dex_file = tmp[0];
+  EXPECT_EQ(PROT_READ, dex_file->GetPermissions());
+  EXPECT_TRUE(dex_file->IsReadOnly());
+  return dex_file;
 }
 
 static bool ModifyAndLoad(const char* location, size_t offset, uint8_t new_val,