Add option to generate compressed backtrace info.

Add flag --generate-mini-debug-info which generates
LZMA compressed .symtab and .debug_frame, which are
sufficient to print java backtraces in libunwind.

If enabled, it increases the size of boot.oat by about 3.5%.

Change-Id: Ic3c2ef7704c05fa328720c6781ca2a9b8e3935a3

1 files changed, 12 insertions, 0 deletions

diff --git a/compiler/driver/compiler_options.h b/compiler/driver/compiler_options.h
index d47fc2ad4b..5294af8b2c 100644
--- a/compiler/driver/compiler_options.h
+++ b/compiler/driver/compiler_options.h
@@ -51,6 +51,7 @@ class CompilerOptions FINAL {
   static constexpr double kDefaultTopKProfileThreshold = 90.0;
   static const bool kDefaultNativeDebuggable = false;
   static const bool kDefaultGenerateDebugInfo = false;
+  static const bool kDefaultGenerateMiniDebugInfo = false;
   static const bool kDefaultIncludePatchInformation = false;
   static const size_t kDefaultInlineDepthLimit = 3;
   static const size_t kDefaultInlineMaxCodeUnits = 32;
@@ -170,10 +171,20 @@ class CompilerOptions FINAL {
     return native_debuggable_;
   }
 
+  // This flag controls whether the compiler collects debugging information.
+  // The other flags control how the information is written to disk.
+  bool GenerateAnyDebugInfo() const {
+    return GetGenerateDebugInfo() || GetGenerateMiniDebugInfo();
+  }
+
   bool GetGenerateDebugInfo() const {
     return generate_debug_info_;
   }
 
+  bool GetGenerateMiniDebugInfo() const {
+    return generate_mini_debug_info_;
+  }
+
   bool GetImplicitNullChecks() const {
     return implicit_null_checks_;
   }
@@ -266,6 +277,7 @@ class CompilerOptions FINAL {
   bool debuggable_;
   bool native_debuggable_;
   bool generate_debug_info_;
+  bool generate_mini_debug_info_;
   bool implicit_null_checks_;
   bool implicit_so_checks_;
   bool implicit_suspend_checks_;