Throw IOException at source of failing to open a dex file.

Before is:
java.lang.ClassNotFoundException: Didn't find class "GCBench" on path: DexPathList[[zip file "/disk2/dalvik-dev/out/host/linux-x86/framework/GCBench.jar"],nativeLibraryDirectories=[/disk2/dalvik-dev/out/host/linux-x86/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
        Suppressed: java.lang.ClassNotFoundException: GCBench
                at java.lang.Class.classForName(Native Method)
                at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
                at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
                at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
                ... 1 more
        Caused by: java.lang.NoClassDefFoundError: Class "LGCBench;" not found
                ... 5 more
And after is:
java.lang.ClassNotFoundException: Didn't find class "GCBench" on path: DexPathList[[zip file "/disk2/dalvik-dev/out/host/linux-x86/framework/GCBench.jar"],nativeLibraryDirectories=[/disk2/dalvik-dev/out/host/linux-x86/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
        Suppressed: java.io.IOException: Zip archive '/disk2/dalvik-dev/out/host/linux-x86/framework/GCBench.jar' doesn't contain classes.dex
                at dalvik.system.DexFile.openDexFile(Native Method)
                at dalvik.system.DexFile.<init>(DexFile.java:80)
                at dalvik.system.DexFile.<init>(DexFile.java:59)
                at dalvik.system.DexPathList.loadDexFile(DexPathList.java:268)
                at dalvik.system.DexPathList.makeDexElements(DexPathList.java:235)
                at dalvik.system.DexPathList.<init>(DexPathList.java:113)
                at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:48)
                at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:38)
                at java.lang.ClassLoader.createSystemClassLoader(ClassLoader.java:128)
                at java.lang.ClassLoader.access$000(ClassLoader.java:65)
                at java.lang.ClassLoader$SystemClassLoader.<clinit>(ClassLoader.java:81)
                at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:137)
        Suppressed: java.lang.ClassNotFoundException: GCBench
                at java.lang.Class.classForName(Native Method)
                at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
                at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
                at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
                ... 1 more
        Caused by: java.lang.NoClassDefFoundError: Class "LGCBench;" not found
                ... 5 more

Also, move dex file verifier messages out of logs.
In the process the ClassLinker::dex_lock_ needed tidying to cover a smaller
scope. Bug 11301553.

Change-Id: I80058652e11e7ea63457cc01a0cb48afe1c15543
diff --git a/runtime/dex_file_verifier.h b/runtime/dex_file_verifier.h
index 3797dc7..4b8b80a 100644
--- a/runtime/dex_file_verifier.h
+++ b/runtime/dex_file_verifier.h
@@ -24,29 +24,35 @@
 
 class DexFileVerifier {
  public:
-  static bool Verify(const DexFile* dex_file, const byte* begin, size_t size);
+  static bool Verify(const DexFile* dex_file, const byte* begin, size_t size,
+                     const char* location, std::string* error_msg);
+
+  const std::string& FailureReason() const {
+    return failure_reason_;
+  }
 
  private:
-  DexFileVerifier(const DexFile* dex_file, const byte* begin, size_t size)
-      : dex_file_(dex_file), begin_(begin), size_(size),
+  DexFileVerifier(const DexFile* dex_file, const byte* begin, size_t size, const char* location)
+      : dex_file_(dex_file), begin_(begin), size_(size), location_(location),
         header_(&dex_file->GetHeader()), ptr_(NULL), previous_item_(NULL)  {
   }
 
   bool Verify();
 
-  bool CheckPointerRange(const void* start, const void* end, const char* label) const;
-  bool CheckListSize(const void* start, uint32_t count, uint32_t element_size, const char* label) const;
-  bool CheckIndex(uint32_t field, uint32_t limit, const char* label) const;
+  bool CheckShortyDescriptorMatch(char shorty_char, const char* descriptor, bool is_return_type);
+  bool CheckPointerRange(const void* start, const void* end, const char* label);
+  bool CheckListSize(const void* start, uint32_t count, uint32_t element_size, const char* label);
+  bool CheckIndex(uint32_t field, uint32_t limit, const char* label);
 
-  bool CheckHeader() const;
-  bool CheckMap() const;
+  bool CheckHeader();
+  bool CheckMap();
 
   uint32_t ReadUnsignedLittleEndian(uint32_t size);
   bool CheckAndGetHandlerOffsets(const DexFile::CodeItem* code_item,
-      uint32_t* handler_offsets, uint32_t handlers_size);
-  bool CheckClassDataItemField(uint32_t idx, uint32_t access_flags, bool expect_static) const;
+                                 uint32_t* handler_offsets, uint32_t handlers_size);
+  bool CheckClassDataItemField(uint32_t idx, uint32_t access_flags, bool expect_static);
   bool CheckClassDataItemMethod(uint32_t idx, uint32_t access_flags, uint32_t code_offset,
-      bool expect_direct) const;
+                                bool expect_direct);
   bool CheckPadding(uint32_t offset, uint32_t aligned_offset);
   bool CheckEncodedValue();
   bool CheckEncodedArray();
@@ -82,14 +88,20 @@
   bool CheckInterSectionIterate(uint32_t offset, uint32_t count, uint16_t type);
   bool CheckInterSection();
 
-  const DexFile* dex_file_;
-  const byte* begin_;
-  size_t size_;
-  const DexFile::Header* header_;
+  void ErrorStringPrintf(const char* fmt, ...)
+      __attribute__((__format__(__printf__, 2, 3))) COLD_ATTR;
+
+  const DexFile* const dex_file_;
+  const byte* const begin_;
+  const size_t size_;
+  const char* const location_;
+  const DexFile::Header* const header_;
 
   SafeMap<uint32_t, uint16_t> offset_to_type_map_;
   const byte* ptr_;
   const void* previous_item_;
+
+  std::string failure_reason_;
 };
 
 }  // namespace art