Update (2023.03.08)

29783: LA port of 8151413: os::allocation_granularity/page_size and friends return signed values
29782: Replace NULL with nullptr in os_cpu/linux_loongarch

src/hotspot/cpu/loongarch/interp_masm_loongarch_64.cpp

@@ -830,7 +830,7 @@ void InterpreterMacroAssembler::lock_object(Register lock_reg) {
     // least significant 2 bits clear.
     // NOTE: the oopMark is in tmp_reg as the result of cmpxchg
     sub_d(tmp_reg, tmp_reg, SP);
-    li(AT, 7 - os::vm_page_size());
+    li(AT, 7 - (int)os::vm_page_size());
     andr(tmp_reg, tmp_reg, AT);
     // Save the test result, for recursive case, the result is zero
     st_d(tmp_reg, lock_reg, mark_offset);

src/hotspot/cpu/loongarch/macroAssembler_loongarch.cpp

@@ -389,7 +389,7 @@ void MacroAssembler::bang_stack_size(Register size, Register tmp) {
   // Bang one page at a time because large size can bang beyond yellow and
   // red zones.
   Label loop;
-  li(AT, os::vm_page_size());
+  li(AT, (int)os::vm_page_size());
   bind(loop);
   sub_d(tmp, tmp, AT);
   sub_d(size, size, AT);
@@ -402,7 +402,7 @@ void MacroAssembler::bang_stack_size(Register size, Register tmp) {
   // was post-decremented.)  Skip this address by starting at i=1, and
   // touch a few more pages below.  N.B.  It is important to touch all
   // the way down to and including i=StackShadowPages.
-  for (int i = 0; i < (int)(StackOverflow::stack_shadow_zone_size() / os::vm_page_size()) - 1; i++) {
+  for (int i = 0; i < (int)(StackOverflow::stack_shadow_zone_size() / (int)os::vm_page_size()) - 1; i++) {
     // this could be any sized move but this is can be a debugging crumb
     // so the bigger the better.
     sub_d(tmp, tmp, AT);

src/hotspot/cpu/loongarch/sharedRuntime_loongarch_64.cpp

@@ -1864,7 +1864,7 @@ nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler* masm,
       // NOTE: the oopMark is in swap_reg %T8 as the result of cmpxchg
 
       __ sub_d(swap_reg, swap_reg, SP);
-      __ li(AT, 3 - os::vm_page_size());
+      __ li(AT, 3 - (int)os::vm_page_size());
       __ andr(swap_reg , swap_reg, AT);
       // Save the test result, for recursive case, the result is zero
       __ st_d(swap_reg, lock_reg, mark_word_offset);

src/hotspot/cpu/loongarch/templateInterpreterGenerator_loongarch.cpp

@@ -750,7 +750,7 @@ void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
   const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize)
     + entry_size;
 
-  const int page_size = os::vm_page_size();
+  const size_t page_size = os::vm_page_size();
   Label after_frame_check;
 
   // see if the frame is greater than one page in size. If so,
@@ -1516,7 +1516,7 @@ void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
   // Bang each page in the shadow zone. We can't assume it's been done for
   // an interpreter frame with greater than a page of locals, so each page
   // needs to be checked.  Only true for non-native.
-  const int page_size = os::vm_page_size();
+  const int page_size = (int)os::vm_page_size();
   const int n_shadow_pages = ((int)StackOverflow::stack_shadow_zone_size()) / page_size;
   const int start_page = native_call ? n_shadow_pages : 1;
   BLOCK_COMMENT("bang_stack_shadow_pages:");

src/hotspot/os_cpu/linux_loongarch/javaThread_linux_loongarch.cpp

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2015, 2022, Loongson Technology. All rights reserved.
+ * Copyright (c) 2015, 2023, Loongson Technology. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -36,7 +36,7 @@ void JavaThread::pd_initialize()
 
 frame JavaThread::pd_last_frame() {
   assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
-  if (_anchor.last_Java_pc() != NULL) {
+  if (_anchor.last_Java_pc() != nullptr) {
     return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc());
   } else {
     // This will pick up pc from sp
@@ -74,16 +74,16 @@ bool JavaThread::pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava)
     intptr_t* ret_fp;
     intptr_t* ret_sp;
     address addr = os::fetch_frame_from_context(uc, &ret_sp, &ret_fp);
-    if (addr == NULL || ret_sp == NULL) {
+    if (addr == nullptr || ret_sp == nullptr) {
       // ucontext wasn't useful
       return false;
     }
 
     frame ret_frame(ret_sp, ret_fp, addr);
     if (!ret_frame.safe_for_sender(this)) {
 #ifdef COMPILER2
-      // C2 and JVMCI use ebp as a general register see if NULL fp helps
-      frame ret_frame2(ret_sp, NULL, addr);
+      // C2 and JVMCI use ebp as a general register see if nullptr fp helps
+      frame ret_frame2(ret_sp, nullptr, addr);
       if (!ret_frame2.safe_for_sender(this)) {
         // nothing else to try if the frame isn't good
         return false;

src/hotspot/os_cpu/linux_loongarch/javaThread_linux_loongarch.hpp

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2015, 2022, Loongson Technology. All rights reserved.
+ * Copyright (c) 2015, 2023, Loongson Technology. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -44,7 +44,7 @@
   }
 
   intptr_t* base_of_stack_pointer() {
-    return NULL;
+    return nullptr;
   }
   void record_base_of_stack_pointer() {
   }

src/hotspot/os_cpu/linux_loongarch/os_linux_loongarch.cpp

@@ -113,14 +113,14 @@ address os::fetch_frame_from_context(const void* ucVoid,
   address  epc;
   ucontext_t* uc = (ucontext_t*)ucVoid;
 
-  if (uc != NULL) {
+  if (uc != nullptr) {
     epc = os::Posix::ucontext_get_pc(uc);
     if (ret_sp) *ret_sp = os::Linux::ucontext_get_sp(uc);
     if (ret_fp) *ret_fp = os::Linux::ucontext_get_fp(uc);
   } else {
-    epc = NULL;
-    if (ret_sp) *ret_sp = (intptr_t *)NULL;
-    if (ret_fp) *ret_fp = (intptr_t *)NULL;
+    epc = nullptr;
+    if (ret_sp) *ret_sp = (intptr_t *)nullptr;
+    if (ret_fp) *ret_fp = (intptr_t *)nullptr;
   }
 
   return epc;
@@ -180,16 +180,16 @@ bool PosixSignals::pd_hotspot_signal_handler(int sig, siginfo_t* info,
 #endif
 
   // decide if this trap can be handled by a stub
-  address stub = NULL;
-  address pc   = NULL;
+  address stub = nullptr;
+  address pc   = nullptr;
 
   pc = (address) os::Posix::ucontext_get_pc(uc);
 #ifdef PRINT_SIGNAL_HANDLE
   tty->print_cr("pc=%lx", pc);
   os::print_context(tty, uc);
 #endif
   //%note os_trap_1
-  if (info != NULL && uc != NULL && thread != NULL) {
+  if (info != nullptr && uc != nullptr && thread != nullptr) {
     pc = (address) os::Posix::ucontext_get_pc(uc);
 
     // Handle ALL stack overflow variations here
@@ -239,12 +239,12 @@ bool PosixSignals::pd_hotspot_signal_handler(int sig, siginfo_t* info,
         // here if the underlying file has been truncated.
         // Do not crash the VM in such a case.
         CodeBlob* cb = CodeCache::find_blob(pc);
-        CompiledMethod* nm = (cb != NULL) ? cb->as_compiled_method_or_null() : NULL;
+        CompiledMethod* nm = (cb != nullptr) ? cb->as_compiled_method_or_null() : nullptr;
 #ifdef PRINT_SIGNAL_HANDLE
         tty->print("cb = %lx, nm = %lx\n", cb, nm);
 #endif
         bool is_unsafe_arraycopy = (thread->doing_unsafe_access() && UnsafeCopyMemory::contains_pc(pc));
-        if ((nm != NULL && nm->has_unsafe_access()) || is_unsafe_arraycopy) {
+        if ((nm != nullptr && nm->has_unsafe_access()) || is_unsafe_arraycopy) {
           address next_pc = pc + NativeInstruction::nop_instruction_size;
           if (is_unsafe_arraycopy) {
             next_pc = UnsafeCopyMemory::page_error_continue_pc(pc);
@@ -297,12 +297,12 @@ bool PosixSignals::pd_hotspot_signal_handler(int sig, siginfo_t* info,
     }
   }
 
-  if (stub != NULL) {
+  if (stub != nullptr) {
 #ifdef PRINT_SIGNAL_HANDLE
     tty->print_cr("resolved stub=%lx\n",stub);
 #endif
     // save all thread context in case we need to restore it
-    if (thread != NULL) thread->set_saved_exception_pc(pc);
+    if (thread != nullptr) thread->set_saved_exception_pc(pc);
 
     os::Posix::ucontext_set_pc(uc, stub);
     return true;
@@ -340,7 +340,7 @@ size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
 /////////////////////////////////////////////////////////////////////////////
 // helper functions for fatal error handler
 void os::print_register_info(outputStream *st, const void *context) {
-  if (context == NULL) return;
+  if (context == nullptr) return;
 
   ucontext_t *uc = (ucontext_t*)context;
 
@@ -395,7 +395,7 @@ void os::print_register_info(outputStream *st, const void *context) {
 }
 
 void os::print_context(outputStream *st, const void *context) {
-  if (context == NULL) return;
+  if (context == nullptr) return;
 
   const ucontext_t *uc = (const ucontext_t*)context;
 
@@ -444,7 +444,7 @@ void os::print_context(outputStream *st, const void *context) {
 }
 
 void os::print_tos_pc(outputStream *st, const void *context) {
-  if (context == NULL) return;
+  if (context == nullptr) return;
 
   const ucontext_t* uc = (const ucontext_t*)context;