Add debug info for link-time generated thunks.

Add debug info for method call thunks (currently unused) and
Baker read barrier thunks. Refactor debug info generation
for trampolines and record their sizes; change their names
to start with upper-case letters, so that they can be easily
generated as `#fn_name`.

This improved debug info must be generated by `dex2oat -g`,
the debug info generated by `oatdump --symbolize` remains
the same as before, except for the renamed trampolines and
an adjustment for "code delta", i.e. the Thumb mode bit.

Cortex-A53 erratum 843419 workaround thunks are not covered
by this CL.

Test: Manual; run-test --gdb -Xcompiler-option -g 160, pull
      symbols for gdbclient, break in the introspection
      entrypoint, check that gdb knows the new symbols
      (and disassembles them) and `backtrace` works when
      setting $pc to an address in the thunk.
Bug: 36141117
Change-Id: Id224b72cfa7a0628799c7db65e66e24c8517aabf

1 files changed, 0 insertions, 25 deletions

diff --git a/compiler/debug/elf_debug_writer.cc b/compiler/debug/elf_debug_writer.cc
index 7fa6e146c5..16e73b0824 100644
--- a/compiler/debug/elf_debug_writer.cc
+++ b/compiler/debug/elf_debug_writer.cc
@@ -174,31 +174,6 @@ std::vector<uint8_t> WriteDebugElfFileForClasses(InstructionSet isa,
   }
 }
 
-std::vector<MethodDebugInfo> MakeTrampolineInfos(const OatHeader& header) {
-  std::map<const char*, uint32_t> trampolines = {
-    { "interpreterToInterpreterBridge", header.GetInterpreterToInterpreterBridgeOffset() },
-    { "interpreterToCompiledCodeBridge", header.GetInterpreterToCompiledCodeBridgeOffset() },
-    { "jniDlsymLookup", header.GetJniDlsymLookupOffset() },
-    { "quickGenericJniTrampoline", header.GetQuickGenericJniTrampolineOffset() },
-    { "quickImtConflictTrampoline", header.GetQuickImtConflictTrampolineOffset() },
-    { "quickResolutionTrampoline", header.GetQuickResolutionTrampolineOffset() },
-    { "quickToInterpreterBridge", header.GetQuickToInterpreterBridgeOffset() },
-  };
-  std::vector<MethodDebugInfo> result;
-  for (const auto& it : trampolines) {
-    if (it.second != 0) {
-      MethodDebugInfo info = MethodDebugInfo();
-      info.trampoline_name = it.first;
-      info.isa = header.GetInstructionSet();
-      info.is_code_address_text_relative = true;
-      info.code_address = it.second - header.GetExecutableOffset();
-      info.code_size = 0;  // The symbol lasts until the next symbol.
-      result.push_back(std::move(info));
-    }
-  }
-  return result;
-}
-
 // Explicit instantiations
 template void WriteDebugInfo<ElfTypes32>(
     ElfBuilder<ElfTypes32>* builder,