You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.9 KiB
69 lines
1.9 KiB
4 years ago
|
From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
|
||
|
|
From: Keith Seitz <keiths@redhat.com>
|
||
|
|
Date: Mon, 27 Jul 2020 17:27:39 -0400
|
||
|
|
Subject: gdb-rhbz1842691-corefile-mem-access-5of15.patch
|
||
|
|
|
||
|
|
;; Test ability to access unwritten-to mmap data in core file
|
||
|
|
;; Kevin Buettner, RH BZ 1842961
|
||
|
|
|
||
|
|
Author: Kevin Buettner <kevinb@redhat.com>
|
||
|
|
Date: Wed Mar 4 17:42:43 2020 -0700
|
||
|
|
|
||
|
|
Test ability to access unwritten-to mmap data in core file
|
||
|
|
|
||
|
|
gdb/testsuite/ChangeLog:
|
||
|
|
|
||
|
|
PR corefiles/25631
|
||
|
|
* gdb.base/corefile.exp (accessing anonymous, unwritten-to mmap data):
|
||
|
|
New test.
|
||
|
|
* gdb.base/coremaker.c (buf3): New global.
|
||
|
|
(mmapdata): Add mmap call which uses MAP_ANONYMOUS and MAP_PRIVATE
|
||
|
|
flags.
|
||
|
|
|
||
|
|
diff --git a/gdb/testsuite/gdb.base/corefile.exp b/gdb/testsuite/gdb.base/corefile.exp
|
||
|
|
--- a/gdb/testsuite/gdb.base/corefile.exp
|
||
|
|
+++ b/gdb/testsuite/gdb.base/corefile.exp
|
||
|
|
@@ -175,6 +175,15 @@ gdb_test_multiple "x/8bd buf2" "$test" {
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
+# Test ability to read anonymous and, more importantly, unwritten-to
|
||
|
|
+# mmap'd data.
|
||
|
|
+
|
||
|
|
+if { ![istarget *-linux*] } {
|
||
|
|
+ setup_xfail "*-*-*"
|
||
|
|
+}
|
||
|
|
+gdb_test "x/wx buf3" "$hex:\[ \t\]+0x00000000" \
|
||
|
|
+ "accessing anonymous, unwritten-to mmap data"
|
||
|
|
+
|
||
|
|
# test reinit_frame_cache
|
||
|
|
|
||
|
|
gdb_load ${binfile}
|
||
|
|
diff --git a/gdb/testsuite/gdb.base/coremaker.c b/gdb/testsuite/gdb.base/coremaker.c
|
||
|
|
--- a/gdb/testsuite/gdb.base/coremaker.c
|
||
|
|
+++ b/gdb/testsuite/gdb.base/coremaker.c
|
||
|
|
@@ -38,6 +38,7 @@
|
||
|
|
|
||
|
|
char *buf1;
|
||
|
|
char *buf2;
|
||
|
|
+char *buf3;
|
||
|
|
|
||
|
|
int coremaker_data = 1; /* In Data section */
|
||
|
|
int coremaker_bss; /* In BSS section */
|
||
|
|
@@ -104,6 +105,15 @@ mmapdata ()
|
||
|
|
}
|
||
|
|
/* Touch buf2 so kernel writes it out into 'core'. */
|
||
|
|
buf2[0] = buf1[0];
|
||
|
|
+
|
||
|
|
+ /* Create yet another region which is allocated, but not written to. */
|
||
|
|
+ buf3 = mmap (NULL, MAPSIZE, PROT_READ | PROT_WRITE,
|
||
|
|
+ MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
|
||
|
|
+ if (buf3 == (char *) -1)
|
||
|
|
+ {
|
||
|
|
+ perror ("mmap failed");
|
||
|
|
+ return;
|
||
|
|
+ }
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|