diff --git a/configure.ac b/configure.ac index 917d9a80..0ae579ee 100644 --- a/configure.ac +++ b/configure.ac @@ -2067,6 +2067,14 @@ if test "x$have_memcntl" = "x1" ; then AC_DEFINE([JEMALLOC_HAVE_MEMCNTL], [ ], [ ]) fi +AC_CHECK_FUNC([prctl], + [have_prctl="1"], + [have_prctl="0"], + ) +if test "x$have_prctl" = "x1" ; then + AC_DEFINE([JEMALLOC_HAVE_PRCTL], [ ], [ ]) +fi + dnl Disable lazy locking by default. AC_ARG_ENABLE([lazy_lock], [AS_HELP_STRING([--enable-lazy-lock], @@ -2435,6 +2443,22 @@ else AC_DEFINE([JEMALLOC_TLS_MODEL], [ ], [ ]) fi +dnl Do not compile with debugging by default. +AC_ARG_ENABLE([pageid], + [AS_HELP_STRING([--enable-pageid], + [Enable named pages])], +[if test "x$enable_pageid" = "xno" ; then + enable_pageid="0" +else + enable_pageid="1" +fi +], +[enable_pageid="0"] +) +if test "x$enable_pageid" = "x1" ; then + AC_DEFINE([JEMALLOC_PAGEID], [ ], [ ]) +fi + dnl ============================================================================ dnl Enable background threads if possible. @@ -2691,5 +2715,6 @@ AC_MSG_RESULT([xmalloc : ${enable_xmalloc}]) AC_MSG_RESULT([log : ${enable_log}]) AC_MSG_RESULT([lazy_lock : ${enable_lazy_lock}]) AC_MSG_RESULT([cache-oblivious : ${enable_cache_oblivious}]) +AC_MSG_RESULT([pageid : ${enable_pageid}]) AC_MSG_RESULT([cxx : ${enable_cxx}]) AC_MSG_RESULT([===============================================================================]) diff --git a/include/jemalloc/internal/jemalloc_internal_defs.h.in b/include/jemalloc/internal/jemalloc_internal_defs.h.in index 888ef470..6dbd8780 100644 --- a/include/jemalloc/internal/jemalloc_internal_defs.h.in +++ b/include/jemalloc/internal/jemalloc_internal_defs.h.in @@ -162,6 +162,12 @@ /* Use gcc intrinsics for profile backtracing if defined. */ #undef JEMALLOC_PROF_GCC +/* JEMALLOC_PAGEID enabled page id */ +#undef JEMALLOC_PAGEID + +/* JEMALLOC_HAVE_PRCTL checks prctl */ +#undef JEMALLOC_HAVE_PRCTL + /* * JEMALLOC_DSS enables use of sbrk(2) to allocate extents from the data storage * segment (DSS). diff --git a/src/pages.c b/src/pages.c index 8c83a7de..b672e4de 100644 --- a/src/pages.c +++ b/src/pages.c @@ -21,6 +21,13 @@ #else #define PAGES_FD_TAG -1 #endif +#ifdef JEMALLOC_HAVE_PRCTL +#include +#ifndef PR_SET_VMA +#define PR_SET_VMA 0x53564d41 +#define PR_SET_VMA_ANON_NAME 0 +#endif +#endif /******************************************************************************/ /* Data. */ @@ -98,6 +105,22 @@ static int madvise_MADV_DONTNEED_zeroes_pages() } #endif +#ifdef JEMALLOC_PAGEID +static int os_page_id(void *addr, size_t size, const char *name) +{ +#ifdef JEMALLOC_HAVE_PRCTL + /* + * While parsing `/proc//maps` file, the block could appear as + * 7f4836000000-7f4836800000 rw-p 00000000 00:00 0 [anon:jemalloc_pg_overcommit]` + */ + return prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, (uintptr_t)addr, size, + (uintptr_t)name); +#else + return 0; +#endif +} +#endif + /******************************************************************************/ /* * Function prototypes for static functions that are referenced prior to @@ -162,6 +185,11 @@ os_pages_map(void *addr, size_t size, size_t alignment, bool *commit) { #endif assert(ret == NULL || (addr == NULL && ret != addr) || (addr != NULL && ret == addr)); +#ifdef JEMALLOC_PAGEID + int n = os_page_id(ret, size, + os_overcommits ? "jemalloc_pg_overcommit" : "jemalloc_pg"); + assert(n == 0 || (n == -1 && get_errno() == EINVAL)); +#endif return ret; }