From 6a288deabc6e718add4552111a6fd2434c723431 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 2 Mar 2011 16:14:32 +0000
Subject: * addr2line.c (uleb128): cast the value to unsigned long.

* addr2line.c (fill_lines): print error when lseek fails.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31010 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 addr2line.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'addr2line.c')

diff --git a/addr2line.c b/addr2line.c
index 6726f9fcf9..68e38cdb7b 100644
--- a/addr2line.c
+++ b/addr2line.c
@@ -85,7 +85,7 @@ uleb128(char **p) {
     for (;;) {
 	unsigned char b = *(unsigned char *)(*p)++;
 	if (b < 0x80) {
-	    r += b << s;
+	    r += (unsigned long)b << s;
 	    break;
 	}
 	r += (b & 0x7f) << s;
@@ -442,6 +442,12 @@ fill_lines(int num_traces, void **traces, char **syms, int check_debuglink,
 	return;
     }
     filesize = lseek(fd, 0, SEEK_END);
+    if (filesize < 0) {
+	int e = errno;
+	close(fd);
+	fprintf(stderr, "lseek: %s\n", strerror(e));
+	return;
+    }
     lseek(fd, 0, SEEK_SET);
     /* async-signal unsafe */
     file = (char *)mmap(NULL, filesize, PROT_READ, MAP_SHARED, fd, 0);
-- 
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