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8245035: Clean up os::split_reserved_memory()

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Reviewed-by: coleenp, stefank
This commit is contained in:
Thomas Stuefe 2020-05-19 21:04:44 +02:00
parent d3e0c4ce9c
commit 939c0a46a7
11 changed files with 48 additions and 59 deletions
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15
src/hotspot/share/runtime/os.hpp
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@ -119,8 +119,6 @@ class os: AllStatic {
size_t alignment_hint = 0);
static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr);
static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr, int file_desc);
static void pd_split_reserved_memory(char *base, size_t size,
size_t split, bool realloc);
static bool pd_commit_memory(char* addr, size_t bytes, bool executable);
static bool pd_commit_memory(char* addr, size_t size, size_t alignment_hint,
bool executable);
@ -320,8 +318,17 @@ class os: AllStatic {
size_t alignment_hint, MEMFLAGS flags);
static char* reserve_memory_aligned(size_t size, size_t alignment, int file_desc = -1);
static char* attempt_reserve_memory_at(size_t bytes, char* addr, int file_desc = -1);
static void split_reserved_memory(char *base, size_t size,
size_t split, bool realloc);
// Split a reserved memory region [base, base+size) into two regions [base, base+split) and
// [base+split, base+size).
// This may remove the original mapping, so its content may be lost.
// Both base and split point must be aligned to allocation granularity; split point shall
// be >0 and <size.
// Splitting guarantees that the resulting two memory regions can be released independently
// from each other using os::release_memory().
static void split_reserved_memory(char *base, size_t size, size_t split);
static bool commit_memory(char* addr, size_t bytes, bool executable);
static bool commit_memory(char* addr, size_t size, size_t alignment_hint,
bool executable);