4 files changed, 30 insertions, 4 deletions
diff --git a/runtime/mirror/art_method-inl.h b/runtime/mirror/art_method-inl.h
index d5eccaf..5d62b88 100644
--- a/runtime/mirror/art_method-inl.h
+++ b/runtime/mirror/art_method-inl.h
@@ -22,6 +22,7 @@
 #include "dex_file.h"
 #include "entrypoints/entrypoint_utils.h"
 #include "object_array.h"
+#include "oat.h"
 #include "runtime.h"
 
 namespace art {
@@ -83,7 +84,7 @@ inline uint32_t ArtMethod::GetCodeSize() {
   }
   // TODO: make this Thumb2 specific
   code &= ~0x1;
-  return reinterpret_cast<uint32_t*>(code)[-1];
+  return reinterpret_cast<OatMethodHeader*>(code)[-1].code_size_;
 }
 
 inline bool ArtMethod::CheckIncompatibleClassChange(InvokeType type) {
diff --git a/runtime/mirror/art_method.h b/runtime/mirror/art_method.h
index fd5ac19..ee23c40 100644
--- a/runtime/mirror/art_method.h
+++ b/runtime/mirror/art_method.h
@@ -270,9 +270,11 @@ class MANAGED ArtMethod : public Object {
       return pc == 0;
     }
     /*
-     * During a stack walk, a return PC may point to the end of the code + 1
-     * (in the case that the last instruction is a call that isn't expected to
+     * During a stack walk, a return PC may point past-the-end of the code
+     * in the case that the last instruction is a call that isn't expected to
      * return.  Thus, we check <= code + GetCodeSize().
+     *
+     * NOTE: For Thumb both pc and code are offset by 1 indicating the Thumb state.
      */
     return (code <= pc && pc <= code + GetCodeSize());
   }
diff --git a/runtime/oat.cc b/runtime/oat.cc
index 246e090..d01dc72 100644
--- a/runtime/oat.cc
+++ b/runtime/oat.cc
@@ -22,7 +22,7 @@
 namespace art {
 
 const uint8_t OatHeader::kOatMagic[] = { 'o', 'a', 't', '\n' };
-const uint8_t OatHeader::kOatVersion[] = { '0', '2', '0', '\0' };
+const uint8_t OatHeader::kOatVersion[] = { '0', '2', '1', '\0' };
 
 OatHeader::OatHeader() {
   memset(this, 0, sizeof(*this));
@@ -372,4 +372,14 @@ OatMethodOffsets::OatMethodOffsets(uint32_t code_offset,
 
 OatMethodOffsets::~OatMethodOffsets() {}
 
+OatMethodHeader::OatMethodHeader()
+  : code_size_(0)
+{}
+
+OatMethodHeader::OatMethodHeader(uint32_t code_size)
+  : code_size_(code_size)
+{}
+
+OatMethodHeader::~OatMethodHeader() {}
+
 }  // namespace art
diff --git a/runtime/oat.h b/runtime/oat.h
index 2851f5c..035aba1 100644
--- a/runtime/oat.h
+++ b/runtime/oat.h
@@ -155,6 +155,19 @@ class PACKED(4) OatMethodOffsets {
   uint32_t gc_map_offset_;
 };
 
+// OatMethodHeader precedes the raw code chunk generated by the Quick compiler.
+class PACKED(4) OatMethodHeader {
+ public:
+  OatMethodHeader();
+
+  explicit OatMethodHeader(uint32_t code_size);
+
+  ~OatMethodHeader();
+
+  // The code size in bytes.
+  uint32_t code_size_;
+};
+
 }  // namespace art
 
 #endif  // ART_RUNTIME_OAT_H_