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| author | Ulrich Drepper <drepper@redhat.com> | 2004-02-11 06:32:32 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-02-11 06:32:32 +0000 |
| commit | 3504e5a65c91c98b92841176eecf1b8d84b2081a (patch) | |
| tree | 0a413a63406b3af32621010a7e047769176723f3 | |
| parent | ada24e76804cb94acd87277dc4c405745fd30b1c (diff) | |
| download | glibc-3504e5a65c91c98b92841176eecf1b8d84b2081a.tar.gz glibc-3504e5a65c91c98b92841176eecf1b8d84b2081a.tar.xz glibc-3504e5a65c91c98b92841176eecf1b8d84b2081a.zip | |
(__add_to_environ): Don't let the temporary copies of the variables accumulate on the stack.
| -rw-r--r-- | sysdeps/generic/setenv.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/sysdeps/generic/setenv.c b/sysdeps/generic/setenv.c index e7fd49228c..a19771391d 100644 --- a/sysdeps/generic/setenv.c +++ b/sysdeps/generic/setenv.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1992,95,96,97,98,99,2000,2001 Free Software Foundation, Inc. +/* Copyright (C) 1992,1995-2001,2004 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -134,12 +134,9 @@ __add_to_environ (name, value, combined, replace) ++size; } - if (ep == NULL || *ep == NULL) + if (ep == NULL || __builtin_expect (*ep == NULL, 1)) { char **new_environ; -#ifdef USE_TSEARCH - char *new_value; -#endif /* We allocated this space; we can extend it. */ new_environ = (char **) realloc (last_environ, @@ -159,7 +156,11 @@ __add_to_environ (name, value, combined, replace) { /* See whether the value is already known. */ #ifdef USE_TSEARCH - new_value = (char *) alloca (namelen + 1 + vallen); +# ifdef __GNUC__ + char new_value[namelen + 1 + vallen]; +# else + char *new_value = (char *) alloca (namelen + 1 + vallen); +# endif # ifdef _LIBC __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1), value, vallen); @@ -170,11 +171,11 @@ __add_to_environ (name, value, combined, replace) # endif new_environ[size] = KNOWN_VALUE (new_value); - if (new_environ[size] == NULL) + if (__builtin_expect (new_environ[size] == NULL, 1)) #endif { new_environ[size] = (char *) malloc (namelen + 1 + vallen); - if (new_environ[size] == NULL) + if (__builtin_expect (new_environ[size] == NULL, 0)) { __set_errno (ENOMEM); UNLOCK; @@ -213,7 +214,11 @@ __add_to_environ (name, value, combined, replace) else { #ifdef USE_TSEARCH - char *new_value = alloca (namelen + 1 + vallen); +# ifdef __GNUC__ + char new_value[namelen + 1 + vallen]; +# else + char *new_value = (char *) alloca (namelen + 1 + vallen); +# endif # ifdef _LIBC __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1), value, vallen); @@ -224,11 +229,11 @@ __add_to_environ (name, value, combined, replace) # endif np = KNOWN_VALUE (new_value); - if (np == NULL) + if (__builtin_expect (np == NULL, 1)) #endif { np = malloc (namelen + 1 + vallen); - if (np == NULL) + if (__builtin_expect (np == NULL, 0)) { UNLOCK; return -1; |