ART: Print and dump functionalities per pass

LOG is a great logging tool but sometimes a pass has some debugging text it
 want to be able to turn on/off easily.

By going via a print_pass flag, we can actually turn it on/off easily per pass
 when debugging/instrumenting.

- Added a pass printer to help debug messages for future passes.
- Added a print_pass flag in CompilationUnit to filter out messages.

At the same time, did a similar system for dumping the CFG.

- Also moved some API into public from protected.

Change-Id: Ie0e89a8fc773e8583f3e4ffd6e4bd2eebdbb2bf4
Signed-off-by: Jean Christophe Beyler <jean.christophe.beyler@intel.com>
Signed-off-by: Razvan A Lupusoru <razvan.a.lupusoru@intel.com>
Signed-off-by: Yixin Shou <yixin.shou@intel.com>
Signed-off-by: Chao-ying Fu <chao-ying.fu@intel.com>
Signed-off-by: Udayan Banerji <udayan.banerji@intel.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/compiler/dex/pass.h b/compiler/dex/pass.h
index 4ce040e9ab..b4906d67df 100644
--- a/compiler/dex/pass.h
+++ b/compiler/dex/pass.h
@@ -89,6 +89,21 @@ class Pass {
     return false;
   }
 
+  static void BasePrintMessage(CompilationUnit* c_unit, const char* pass_name, const char* message, ...) {
+    // Check if we want to log something or not.
+    if (c_unit->print_pass) {
+      // Stringify the message.
+      va_list args;
+      va_start(args, message);
+      std::string stringified_message;
+      StringAppendV(&stringified_message, message, args);
+      va_end(args);
+
+      // Log the message and ensure to include pass name.
+      LOG(INFO) << pass_name << ": " << stringified_message;
+    }
+  }
+
  protected:
   /** @brief The pass name: used for searching for a pass when running a particular pass or debugging. */
   const char* const pass_name_;