forked from pool/glibc
77 lines
2.2 KiB
Diff
77 lines
2.2 KiB
Diff
Index: elf/dl-load.c
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===================================================================
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--- elf/dl-load.c.orig
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+++ elf/dl-load.c
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@@ -1219,6 +1219,9 @@ cannot allocate TLS data structures for
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goto call_lose_errno;
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}
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+ if (GLRO(dl_madvise))
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+ posix_fadvise (fd, c->mapoff, maplength, POSIX_FADV_WILLNEED);
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+
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l->l_map_end = l->l_map_start + maplength;
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l->l_addr = l->l_map_start - c->mapstart;
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Index: elf/dl-support.c
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===================================================================
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--- elf/dl-support.c.orig
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+++ elf/dl-support.c
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@@ -41,6 +41,7 @@ size_t _dl_platformlen;
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int _dl_debug_mask;
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int _dl_lazy;
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+int _dl_madvise;
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ElfW(Addr) _dl_use_load_bias = -2;
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int _dl_dynamic_weak;
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@@ -240,6 +241,8 @@ _dl_non_dynamic_init (void)
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_dl_lazy = *(getenv ("LD_BIND_NOW") ?: "") == '\0';
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+ _dl_madvise = *(getenv ("LD_NOMADVISE") ?: "") == '\0';
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+
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_dl_bind_not = *(getenv ("LD_BIND_NOT") ?: "") != '\0';
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_dl_dynamic_weak = *(getenv ("LD_DYNAMIC_WEAK") ?: "") == '\0';
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Index: elf/rtld.c
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===================================================================
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--- elf/rtld.c.orig
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+++ elf/rtld.c
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@@ -152,6 +152,7 @@ struct rtld_global_ro _rtld_global_ro at
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._dl_lazy = 1,
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._dl_fpu_control = _FPU_DEFAULT,
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._dl_pointer_guard = 1,
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+ ._dl_madvise = 1,
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/* Function pointers. */
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._dl_debug_printf = _dl_debug_printf,
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@@ -2619,6 +2620,14 @@ process_envvars (enum mode *modep)
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break;
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case 9:
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+ /* Test whether we should not advise the kernel
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+ about memory usage. */
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+ if (memcmp (envline, "NOMADVISE", 9) == 0)
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+ {
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+ GLRO(dl_madvise) = envline[10] == '\0';
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+ break;
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+ }
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+
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/* Test whether we want to see the content of the auxiliary
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array passed up from the kernel. */
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if (!INTUSE(__libc_enable_secure)
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Index: sysdeps/generic/ldsodefs.h
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===================================================================
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--- sysdeps/generic/ldsodefs.h.orig
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+++ sysdeps/generic/ldsodefs.h
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@@ -567,6 +567,9 @@ struct rtld_global_ro
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/* Do we do lazy relocations? */
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EXTERN int _dl_lazy;
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+ /* Should we advise kernel about memory usage? */
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+ EXTERN int _dl_madvise;
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+
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/* Nonzero if runtime lookups should not update the .got/.plt. */
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EXTERN int _dl_bind_not;
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