Attachment 2402 Details for Bug 14264 – Сам патч

[patch] Сам патч

glibc-2.3.90-ld.so-madvise.diff (text/plain), 2.40 KB, created by Gleb Stiblo on 2008-01-31 16:25:15 MSK

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Creator: Gleb Stiblo

Created: 2008-01-31 16:25:15 MSK

Size: 2.40 KB

patch

obsolete

>diff -Naur glibc-2.5.1-alt2.orig/elf/dl-load.c glibc-2.5.1-alt2/elf/dl-load.c
>--- glibc-2.5.1-alt2.orig/elf/dl-load.c	2008-01-17 16:37:23 +0200
>+++ glibc-2.5.1-alt2/elf/dl-load.c	2008-01-17 16:51:42 +0200
>@@ -1213,6 +1213,11 @@
> 	    goto call_lose_errno;
> 	  }
> 
>+	if (GLRO(dl_madvise)) {
>+	  //fadvising
>+	  posix_fadvise (fd, c->mapoff, maplength, POSIX_FADV_WILLNEED);
>+	}
>+
> 	l->l_map_end = l->l_map_start + maplength;
> 	l->l_addr = l->l_map_start - c->mapstart;
> 
>diff -Naur glibc-2.5.1-alt2.orig/elf/dl-support.c glibc-2.5.1-alt2/elf/dl-support.c
>--- glibc-2.5.1-alt2.orig/elf/dl-support.c	2008-01-17 16:37:27 +0200
>+++ glibc-2.5.1-alt2/elf/dl-support.c	2008-01-17 16:44:37 +0200
>@@ -42,6 +42,7 @@
> 
> int _dl_debug_mask;
> int _dl_lazy;
>+int _dl_madvise;
> ElfW(Addr) _dl_use_load_bias = -2;
> int _dl_dynamic_weak;
> 
>@@ -251,6 +252,8 @@
> 
>   _dl_lazy = *(__secure_getenv ("LD_BIND_NOW") ?: "") == '\0';
> 
>+  _dl_madvise = *(__secure_getenv ("LD_NOMADVISE") ?: "") == '\0';
>+
>   _dl_bind_not = *(__secure_getenv ("LD_BIND_NOT") ?: "") != '\0';
> 
>   _dl_dynamic_weak = *(__secure_getenv ("LD_DYNAMIC_WEAK") ?: "") == '\0';
>diff -Naur glibc-2.5.1-alt2.orig/elf/rtld.c glibc-2.5.1-alt2/elf/rtld.c
>--- glibc-2.5.1-alt2.orig/elf/rtld.c	2008-01-17 16:37:27 +0200
>+++ glibc-2.5.1-alt2/elf/rtld.c	2008-01-17 16:43:49 +0200
>@@ -152,6 +152,7 @@
>     ._dl_lazy = 1,
>     ._dl_fpu_control = _FPU_DEFAULT,
>     ._dl_pointer_guard = 1,
>+    ._dl_madvise = 1,
> 
>     /* Function pointers.  */
>     ._dl_debug_printf = _dl_debug_printf,
>@@ -2574,6 +2575,14 @@
> 	  break;
> 
> 	case 9:
>+	  /* Test whether we should not advise the kernel
>+	     about memory usage.  */
>+	  if (memcmp (envline, "NOMADVISE", 9) == 0)
>+	    {
>+	      GLRO(dl_madvise) = envline[10] == '\0';
>+	      break;
>+	    }
>+
> 	  /* Test whether we want to see the content of the auxiliary
> 	     array passed up from the kernel.  */
> 	  if (memcmp (envline, "SHOW_AUXV", 9) == 0)
>diff -Naur glibc-2.5.1-alt2.orig/sysdeps/generic/ldsodefs.h glibc-2.5.1-alt2/sysdeps/generic/ldsodefs.h
>--- glibc-2.5.1-alt2.orig/sysdeps/generic/ldsodefs.h	2008-01-17 16:37:26 +0200
>+++ glibc-2.5.1-alt2/sysdeps/generic/ldsodefs.h	2008-01-17 16:43:49 +0200
>@@ -573,6 +573,9 @@
>   /* Do we do lazy relocations?  */
>   EXTERN int _dl_lazy;
> 
>+  /* Should we advise kernel about memory usage? */
>+  EXTERN int _dl_madvise;
>+
>   /* Nonzero if runtime lookups should not update the .got/.plt.  */
>   EXTERN int _dl_bind_not;
>

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