lua: introduce soft memory limits that trigger a gc run but do not result in an oom...

SVN-Revision: 17016

diff --git a/package/lua/Makefile b/package/lua/Makefile
index f5fca7b8f8a62e75ce0ba9951c116d721db17d92..b418b303efeff4fb1171eeaebdebc61005d09d04 100644 (file)
--- a/package/lua/Makefile
+++ b/package/lua/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=lua
 PKG_VERSION:=5.1.4
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.lua.org/ftp/ \

diff --git a/package/lua/patches/040-memory-limits.patch b/package/lua/patches/040-memory-limits.patch
index 52bae6ae85ce7389344fa0bce74528f76c3682ca..bc6526b3f7cedc0e4770bdea8d097997136a03e9 100644 (file)
--- a/package/lua/patches/040-memory-limits.patch
+++ b/package/lua/patches/040-memory-limits.patch
@@ -147,7 +147,7 @@
      last -= n-1;
 --- a/src/lua.c
 +++ b/src/lua.c
-@@ -19,6 +19,82 @@
+@@ -19,6 +19,94 @@
  #include "llimits.h"
  
  
@@ -156,6 +156,7 @@
 +      lua_State       *L;
 +      size_t          memused;
 +      size_t          peak_memused;
++      size_t          gc_memused;
 +      size_t          max_memused;
 +      int             collecting;
 +} script_info_t;
@@ -172,7 +173,8 @@
 +              return NULL;
 +      }
 +      info->memused += nsize;
-+      if(info->max_memused > 0 && nsize > osize && info->memused >= info->max_memused) {
++      if(info->max_memused > 0 && nsize > osize &&
++        (info->memused >= info->max_memused || info->memused >= info->gc_memused)) {
 +#ifdef LOW_MEM_DEBUG
 +              printf("LOW MEM: 1 osize=%zd, nsize=%zd, used=%zu, peak=%zu, need=%zd\n", osize, nsize,
 +                      info->memused, info->peak_memused, (info->memused - info->max_memused));
@@ -207,15 +209,24 @@
 +
 +static int set_memory_limit(lua_State *L)
 +{
-+      int limit = luaL_checknumber(L, 1);
++      int hardlimit = luaL_checknumber(L, 1);
++      int softlimit = luaL_optnumber(L, 2, 0);
++
 +      script_info_t *info;
 +      lua_getallocf(L, (void *)(&info));
 +
-+      if( limit >= 0 )
-+              info->max_memused = limit;
++      if( hardlimit >= 0 )
++      {
++              if( softlimit <= 0 )
++                      softlimit = (int)((float)hardlimit * 0.75);
++
++              info->max_memused = hardlimit;
++              info->gc_memused  = softlimit;
++      }
 +
-+      lua_pushnumber(L, limit);
-+      return 1;
++      lua_pushnumber(L, hardlimit);
++      lua_pushnumber(L, softlimit);
++      return 2;
 +}
 +
 +static int get_memory_limit(lua_State *L)
@@ -223,14 +234,15 @@
 +      script_info_t *info;
 +      lua_getallocf(L, (void *)(&info));
 +      lua_pushnumber(L, info->max_memused);
-+      return 1;
++      lua_pushnumber(L, info->gc_memused);
++      return 2;
 +}
 +
 +
  static lua_State *globalL = NULL;
  
  static const char *progname = LUA_PROGNAME;
-@@ -377,11 +453,28 @@
+@@ -377,11 +465,28 @@
  int main (int argc, char **argv) {
    int status;
    struct Smain s;
@@ -260,7 +272,7 @@
    /* Checking 'sizeof(lua_Integer)' cannot be made in preprocessor on all compilers.
    */
  #ifdef LNUM_INT16
-@@ -396,6 +489,14 @@
+@@ -396,6 +501,14 @@
    status = lua_cpcall(L, &pmain, &s);
    report(L, status);
    lua_close(L);