project-base/server-skynet-source-3rd-jemalloc
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Mac OS: Tag mapped pages.

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This can be used to help profiling tools (e.g. vmmap) identify the
sources of mappings more specifically.
This commit is contained in:
David CARLIER 2021-01-26 21:49:08 +00:00 committed by David Goldblatt
parent f6699803e2
commit 35a8552605
3 changed files with 22 additions and 2 deletions
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12
configure.ac
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@ -926,6 +926,18 @@ if test "x${je_cv_cold}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_ATTR_COLD], [ ])
fi
dnl Check for VM_MAKE_TAG for mmap support.
JE_COMPILABLE([vm_make_tag],
[#include <sys/mman.h>
#include <mach/vm_statistics.h>],
[void *p;
p = mmap(0, 16, PROT_READ, MAP_ANON|MAP_PRIVATE, VM_MAKE_TAG(1), 0);
munmap(p, 16);],
[je_cv_vm_make_tag])
if test "x${je_cv_vm_make_tag}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_VM_MAKE_TAG], [ ])
fi
dnl Support optional additions to rpath.
AC_ARG_WITH([rpath],
[AS_HELP_STRING([--with-rpath=<rpath>], [Colon-separated rpath (ELF systems only)])],

3
include/jemalloc/internal/jemalloc_internal_defs.h.in
View File

@ -404,4 +404,7 @@
/* Performs additional size checks when defined. */
#undef JEMALLOC_OPT_SIZE_CHECKS
/* Darwin VM_MAKE_TAG support */
#undef JEMALLOC_HAVE_VM_MAKE_TAG
#endif /* JEMALLOC_INTERNAL_DEFS_H_ */

9
src/pages.c
View File

@ -16,6 +16,11 @@
#ifdef __NetBSD__
#include <sys/bitops.h> /* ilog2 */
#endif
#ifdef JEMALLOC_HAVE_VM_MAKE_TAG
#define PAGES_FD_TAG VM_MAKE_TAG(101U)
#else
#define PAGES_FD_TAG -1
#endif
/******************************************************************************/
/* Data. */
@ -141,7 +146,7 @@ os_pages_map(void *addr, size_t size, size_t alignment, bool *commit) {
#endif
int prot = *commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT;
ret = mmap(addr, size, prot, mmap_flags, -1, 0);
ret = mmap(addr, size, prot, mmap_flags, PAGES_FD_TAG, 0);
}
assert(ret != NULL);
@ -326,7 +331,7 @@ pages_commit_impl(void *addr, size_t size, bool commit) {
{
int prot = commit ? PAGES_PROT_COMMIT : PAGES_PROT_DECOMMIT;
void *result = mmap(addr, size, prot, mmap_flags | MAP_FIXED,
-1, 0);
PAGES_FD_TAG, 0);
if (result == MAP_FAILED) {
return true;
}