hg: jdk8u/jdk8u/hotspot: 4 new changesets

[rob.mckenna at oracle.com]

Changeset: 16b9bbfaa450
Author:    phh
Date:      2018-09-14 07:58 -0700
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/16b9bbfaa450

8209863: Add a test to verify that -XX:+EnableTracing works
Summary: A new test verifies that tracing output occurs with the switch enabled.
Reviewed-by: dholmes, phh
Contributed-by: Xin Liu <xxinliu at amazon.com>

+ test/runtime/EnableTracing/TestEnableTracing.java

Changeset: 25beb9e0ffa7
Author:    sgehwolf
Date:      2018-09-19 14:26 -0400
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/25beb9e0ffa7

8207057: No debug info for assembler files
Summary: Generate debug info for assembler files as needed.
Reviewed-by: erikj

! make/linux/makefiles/gcc.make

Changeset: 7a6239517d46
Author:    zgu
Date:      2018-09-19 19:48 -0400
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/7a6239517d46

8205965: SIGSEGV on write to NativeCallStack::EMPTY_STACK
Summary: Made EMPTY_STACK non-const, so it will not be placed in read-only BSS section.
Reviewed-by: stuefe, martin
Contributed-by: zhaixiang at loongson.cn

! src/share/vm/services/mallocSiteTable.hpp
! src/share/vm/services/memTracker.hpp
! src/share/vm/services/virtualMemoryTracker.cpp
! src/share/vm/services/virtualMemoryTracker.hpp
! src/share/vm/utilities/nativeCallStack.cpp
! src/share/vm/utilities/nativeCallStack.hpp

Changeset: b7f0e16c80dd
Author:    sgehwolf
Date:      2018-09-20 16:05 +0200
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/b7f0e16c80dd

8210350: -Wl,-z,defs JDK 8 build failure
Reviewed-by: erikj

! make/linux/makefiles/saproc.make