From 33c0573598ddd0714b59ac6e1ec4c252a3eff2ba Mon Sep 17 00:00:00 2001
From: George Koehler <kernigh@gmail.com>
Date: Wed, 14 Nov 2018 16:13:54 -0500
Subject: [PATCH] Remove code to calculate memory usage with sbrk().

In many systems, malloc() can allocate outside the brk area.  The
calculation with sbrk() misses those allocations.  When LLgen or ncgg
reported the memory usage, the value was probably too low.
---
 util/LLgen/src/main.c | 5 -----
 util/ncgg/main.c      | 4 ----
 util/ncgg/output.c    | 2 --
 3 files changed, 11 deletions(-)

diff --git a/util/LLgen/src/main.c b/util/LLgen/src/main.c
index 1bd31aa46..11a5c26a8 100644
--- a/util/LLgen/src/main.c
+++ b/util/LLgen/src/main.c
@@ -37,12 +37,10 @@ extern		fatal();
 extern		comfatal();
 extern		copyfile();
 extern void install();
-extern char	*sbrk();
 
 main(argc,argv) register string	argv[]; {
 	register string arg;
 	string libpath();
-	char	*beg_sbrk = 0;
 
 	/* Initialize */
 
@@ -129,8 +127,6 @@ main(argc,argv) register string	argv[]; {
 		argc--;
 	}
 
-	if (verbose) beg_sbrk = sbrk(0);
-
 #ifdef NON_CORRECTING
 	if ((subpars_sim) && (!non_corr)) {
 	    fprintf(stderr,"option -s illegal without -n, turned off\n");
@@ -206,7 +202,6 @@ main(argc,argv) register string	argv[]; {
 		fprintf(stderr, "number of tokens: %d\n", ntokens);
 		fprintf(stderr, "number of term structures: %d\n", nterms);
 		fprintf(stderr, "number of alternation structures: %d\n", nalts);
-		fprintf(stderr, "total memory used: %ld\n", (long)(sbrk(0) - beg_sbrk));
 	}
 	exit(0);
 }
diff --git a/util/ncgg/main.c b/util/ncgg/main.c
index 330e08c98..dff1f4d54 100644
--- a/util/ncgg/main.c
+++ b/util/ncgg/main.c
@@ -11,8 +11,6 @@ static char rcsid[]= "$Id$";
 #include "extern.h"
 
 char *filename;
-char *beg_sbrk;
-extern char *sbrk();
 
 main(argc,argv) char **argv; {
 	extern int nerrors;
@@ -20,8 +18,6 @@ main(argc,argv) char **argv; {
 	extern int tabledebug;
 	extern int verbose;
 
-	beg_sbrk = sbrk(0);
-
 	while (argc >1 && argv[1][0]=='-') {
 		switch(argv[1][1]) {
 		case 'c':
diff --git a/util/ncgg/output.c b/util/ncgg/output.c
index 02e3162f7..7d85b9179 100644
--- a/util/ncgg/output.c
+++ b/util/ncgg/output.c
@@ -902,7 +902,6 @@ used(resource,use,max) char *resource; {
 }
 
 statistics() {
-	extern char *beg_sbrk,*sbrk();
 	extern int nnodes, maxempatlen,maxrule;
 
 	used("Registers",nregs,MAXREGS);
@@ -926,5 +925,4 @@ statistics() {
 	used("Pat bytes",npatbytes+1,MAXPATBYTES);
 	if (tabledebug)
 		used("Source lines",maxline,MAXSOURCELINES);
-	fprintf(stderr,"%ldK heap used\n",((long) (sbrk(0)-beg_sbrk+1023))/1024);
 }