> Please review the implementation of JEP 391: macOS/AArch64 Port. > > It's heavily based on existing ports to linux/aarch64, macos/x86_64, and > windows/aarch64. > > Major changes are in: > * src/hotspot/cpu/aarch64: support of the new calling convention (subtasks > JDK-8253817, JDK-8253818) > * src/hotspot/os_cpu/bsd_aarch64: copy of os_cpu/linux_aarch64 with necessary > adjustments (JDK-8253819) > * src/hotspot/share, test/hotspot/gtest: support of write-xor-execute (W^X), > required on macOS/AArch64 platform. It's implemented with > pthread_jit_write_protect_np provided by Apple. The W^X mode is local to a > thread, so W^X mode change relates to the java thread state change (for java > threads). In most cases, JVM executes in write-only mode, except when calling > a generated stub like SafeFetch, which requires a temporary switch to > execute-only mode. The same execute-only mode is enabled when a java thread > executes in java or native states. This approach of managing W^X mode turned > out to be simple and efficient enough. > * src/jdk.hotspot.agent: serviceability agent implementation (JDK-8254941)
Anton Kozlov has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 73 commits: - Merge remote-tracking branch 'upstream/jdk/master' into jdk-macos Additional work for JDK-8253817: Support macOS Aarch64 ABI in Interpreter - JDK-8257882: oops, fixed 7fe50a996b6f436932452d220b351c73153ed945 - Update signal handler part for debugger - Cleanup SA changes - Merge remote-tracking branch 'origin/jdk/jdk-macos' into jdk-macos - support macos_aarch64 in hsdis - Merge branch 'master' into jdk-macos - Update copyright year for BsdAARCH64ThreadContext.java - Fix inclusing of StubRoutines header - Redo buildsys fix - ... and 63 more: https://git.openjdk.java.net/jdk/compare/40ae9937...4094f351 ------------- Changes: https://git.openjdk.java.net/jdk/pull/2200/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2200&range=13 Stats: 3066 lines in 84 files changed: 2954 ins; 47 del; 65 mod Patch: https://git.openjdk.java.net/jdk/pull/2200.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/2200/head:pull/2200 PR: https://git.openjdk.java.net/jdk/pull/2200
