From 585afbbc6a833e91cd2e51b8faeece2248c0cc16 Mon Sep 17 00:00:00 2001
From: kosaki <kosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 21 Dec 2012 17:21:12 +0000
Subject: [PATCH] * vm_dump.c (rb_vm_bugreport): revert r38533. * addr2line.c
 (fill_lines): add ELF sanity check.   [Bug #7597] [ruby-dev:46786]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38543 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog   |  6 ++++++
 addr2line.c | 11 ++++++++++-
 vm_dump.c   |  9 ++++-----
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 9af87a49e3..264d7aaba2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Dec 22 02:19:38 2012  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* vm_dump.c (rb_vm_bugreport): revert r38533.
+	* addr2line.c (fill_lines): add ELF sanity check.
+	  [Bug #7597] [ruby-dev:46786]
+
 Sat Dec 22 02:05:00 2012  Zachary Scott  <zachary@zacharyscott.net>
 
 	* lib/irb/inspector.rb, lib/irb/context.rb: Move IRB::INSPECTORS and
diff --git a/addr2line.c b/addr2line.c
index e102abba4f..04a48e751d 100644
--- a/addr2line.c
+++ b/addr2line.c
@@ -493,6 +493,16 @@ fill_lines(int num_traces, void **traces, char **syms, int check_debuglink,
 	return;
     }
 
+    ehdr = (ElfW(Ehdr) *)file;
+    if (memcmp(ehdr->e_ident, "\177ELF", 4) != 0) {
+	/*
+	 * Huh? Maybe filename was overridden by setproctitle() and
+	 * it match non-elf file.
+	 */
+	close(fd);
+	return;
+    }
+
     current_line->fd = fd;
     current_line->mapped = file;
     current_line->mapped_size = (size_t)filesize;
@@ -506,7 +516,6 @@ fill_lines(int num_traces, void **traces, char **syms, int check_debuglink,
 	}
     }
 
-    ehdr = (ElfW(Ehdr) *)file;
     shdr = (ElfW(Shdr) *)(file + ehdr->e_shoff);
 
     shstr_shdr = shdr + ehdr->e_shstrndx;
diff --git a/vm_dump.c b/vm_dump.c
index 50d3ebfdf5..292280c40f 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -644,15 +644,14 @@ rb_vm_bugreport(void)
 	char **syms = backtrace_symbols(trace, n);
 
 	if (syms) {
-/* commentout temporarily. we have to fix addr2line. see [Bug #7597] */
-/* #ifdef USE_ELF */
-/* 	    rb_dump_backtrace_with_lines(n, trace, syms); */
-/* #else */
+#ifdef USE_ELF
+	    rb_dump_backtrace_with_lines(n, trace, syms);
+#else
 	    int i;
 	    for (i=0; i<n; i++) {
 		fprintf(stderr, "%s\n", syms[i]);
 	    }
-/* #endif */
+#endif
 	    free(syms);
 	}
 #elif defined(_WIN32)