Print full diagnostics file when Java process crashes.

Bug: 132766811
Test: treehugger
Change-Id: I8cca2486f2194a8643007a53e4a695d2a18abbf8

java/config/config.go

@@ -69,6 +69,8 @@ func init() {
 		// b/65004097: prevent using java.lang.invoke.StringConcatFactory when using -target 1.9
 		`-XDstringConcat=inline`,
 	}, " "))
+	pctx.StaticVariable("JavaVmFlags", "-XX:OnError=\"cat hs_err_pid%p.log\"")
+	pctx.StaticVariable("JavacVmFlags", "-J-XX:OnError=\"cat hs_err_pid%p.log\"")
 
 	pctx.VariableConfigMethod("hostPrebuiltTag", android.Config.PrebuiltOS)