Relocate DWARF using .oat_patches.

The current solution is to hard-code knowledge of DWARF in the linker.
This works for simple use of DWARF, but breaks as soon as I try to do
anything more complex.  Making the linker fully support DWARF would be
non-trivial task and would be essentially rewrite.  Using .oat_patches
is much easier solution.

Relocating .debug_* sections required extending .oat_patches to support
more sections than just .text.  I have encoded each section as
null-terminated section name followed by ULEB128 deltas.

The ULEB128 encoding shrinks .oat_patches for .text by factor of
about 6 with 64-bit compiler, and factor of 3 with 32-bit compiler.

On the other hand, it grows by the extra .oat_patches for DWARF which
were not present before (if debug symbols are included).

Overall, it is still a clear improvement even with the DWARF patches.

Change-Id: I78ffeda0f8a3da03341995a3b5ef15c954e16e9f

1 files changed, 0 insertions, 5 deletions

diff --git a/patchoat/patchoat.h b/patchoat/patchoat.h
index 418650ac16..86f9118e2e 100644
--- a/patchoat/patchoat.h
+++ b/patchoat/patchoat.h
@@ -109,11 +109,6 @@ class PatchOat {
   template <typename ElfFileImpl>
   bool PatchElf(ElfFileImpl* oat_file);
   template <typename ElfFileImpl>
-  bool PatchTextSection(ElfFileImpl* oat_file);
-  // Templatized version to actually do the patching with the right sized offsets.
-  template <typename ElfFileImpl, typename patch_loc_t> bool PatchTextSection(ElfFileImpl* oat_file);
-  template <typename ElfFileImpl, typename patch_loc_t> bool CheckOatFile(ElfFileImpl* oat_filec);
-  template <typename ElfFileImpl>
   bool PatchOatHeader(ElfFileImpl* oat_file);
 
   bool PatchImage() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);