This is my first effort at contributing to gcc, so I thought I would try
with some of the easy stuff listed here:
https://gcc.gnu.org/projects/beginner.html
Attached is a patch removing a block which has been #if 0'd out since
2006. I tested the build afterward.
I look forward to your feedback.
Glen Stark
From 479aade4f9120f200bf77f027d9f4fce34b56b5c Mon Sep 17 00:00:00 2001
From: Glen Stark <m...@glenstark.net>
Date: Sat, 9 Apr 2016 22:05:03 +0200
Subject: [PATCH] Removed stale # if 0 statement
---
boehm-gc/os_dep.c | 33 ---------------------------------
1 file changed, 33 deletions(-)
diff --git a/boehm-gc/os_dep.c b/boehm-gc/os_dep.c
index 2b22c9d..caff82e 100644
--- a/boehm-gc/os_dep.c
+++ b/boehm-gc/os_dep.c
@@ -1566,38 +1566,6 @@ void GC_register_data_segments()
# define SBRK_ARG_T int
# endif
-
-# if 0 && defined(RS6000) /* We now use mmap */
-/* The compiler seems to generate speculative reads one past the end of */
-/* an allocated object. Hence we need to make sure that the page */
-/* following the last heap page is also mapped. */
-ptr_t GC_unix_get_mem(bytes)
-word bytes;
-{
- caddr_t cur_brk = (caddr_t)sbrk(0);
- caddr_t result;
- SBRK_ARG_T lsbs = (word)cur_brk & (GC_page_size-1);
- static caddr_t my_brk_val = 0;
-
- if ((SBRK_ARG_T)bytes < 0) return(0); /* too big */
- if (lsbs != 0) {
- if((caddr_t)(sbrk(GC_page_size - lsbs)) == (caddr_t)(-1)) return(0);
- }
- if (cur_brk == my_brk_val) {
- /* Use the extra block we allocated last time. */
- result = (ptr_t)sbrk((SBRK_ARG_T)bytes);
- if (result == (caddr_t)(-1)) return(0);
- result -= GC_page_size;
- } else {
- result = (ptr_t)sbrk(GC_page_size + (SBRK_ARG_T)bytes);
- if (result == (caddr_t)(-1)) return(0);
- }
- my_brk_val = result + bytes + GC_page_size; /* Always page aligned */
- return((ptr_t)result);
-}
-
-#else /* Not RS6000 */
-
#if defined(USE_MMAP) || defined(USE_MUNMAP)
#ifdef USE_MMAP_FIXED
@@ -1694,7 +1662,6 @@ word bytes;
}
#endif /* Not USE_MMAP */
-#endif /* Not RS6000 */
# endif /* UN*X */
--
2.5.5
