commit ac3ebc3150760425ed00abd56da48f9a6e0666bc
author Nicolas Geoffray <ngeoffray@google.com> Wed Oct 05 13:13:50 2016 +0100
committer Nicolas Geoffray <ngeoffray@google.com> Tue Nov 08 17:21:30 2016 +0000
tree 3c5c923bb00a898e035c0e7c4b8a6a684a578419
parent 76ad2405b40547e0ab4fc401fb8303189ff783eb

JIT root tables.

Implement root tables for the JIT. Each JIT compiled method
gets a table allocated before the stack maps.

The table gets visited through Runtime::SweepSystemWeaks.

Implement String roots for x86_64 as an example.

Test: test-art-host test-art-target

Change-Id: Id3d5bc67479e08b52dd4b253e970201203a0f0d2

compiler/optimizing/nodes.h

diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index ce2edde..a946e31 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -5692,7 +5692,10 @@
     // all other types are unavailable.
     kDexCacheViaMethod,
 
-    kLast = kDexCacheViaMethod
+    // Load from the root table associated with the JIT compiled method.
+    kJitTableAddress,
+
+    kLast = kJitTableAddress,
   };
 
   HLoadString(HCurrentMethod* current_method,
@@ -5750,7 +5753,8 @@
     LoadKind load_kind = GetLoadKind();
     if (load_kind == LoadKind::kBootImageLinkTimeAddress ||
         load_kind == LoadKind::kBootImageLinkTimePcRelative ||
-        load_kind == LoadKind::kBootImageAddress) {
+        load_kind == LoadKind::kBootImageAddress ||
+        load_kind == LoadKind::kJitTableAddress) {
       return false;
     }
     return !IsInDexCache();
@@ -5803,7 +5807,8 @@
     return load_kind == LoadKind::kBootImageLinkTimeAddress ||
         load_kind == LoadKind::kBootImageLinkTimePcRelative ||
         load_kind == LoadKind::kBssEntry ||
-        load_kind == LoadKind::kDexCacheViaMethod;
+        load_kind == LoadKind::kDexCacheViaMethod ||
+        load_kind == LoadKind::kJitTableAddress;
   }
 
   static bool HasAddress(LoadKind load_kind) {