[binutils-gdb] Harden gdb.arch/aarch64-pauth.exp and fix a failure

[Luis Machado <luisgpm@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=85d2d5bbee1c21c2e3e929cc68fe06d762b3073b

commit 85d2d5bbee1c21c2e3e929cc68fe06d762b3073b
Author: Luis Machado <luis.machado@linaro.org>
Date:   Fri Feb 21 17:58:48 2020 -0300

    Harden gdb.arch/aarch64-pauth.exp and fix a failure
    
    When running this testcase against a QEMU with PAC support, i noticed we
    were failing to recognize the additional [PAC] that is emitted in the
    backtrace, resulting in this failure:
    
    FAIL: gdb.arch/aarch64-pauth.exp: backtrace
    
    I've made the test use multi_line to make the pattern more clear.
    
    Tested against aarch64-linux-gnu with and without PAC support.
    
    gdb/testsuite/ChangeLog:
    
    2020-02-28  Luis Machado  <luis.machado@linaro.org>
    
    	* gdb.arch/aarch64-pauth.exp: Recognize optional PAC output.

Diff:
---
 gdb/testsuite/ChangeLog                  | 4 ++++
 gdb/testsuite/gdb.arch/aarch64-pauth.exp | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index d5798bd..eb81976 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2020-02-28  Luis Machado  <luis.machado@linaro.org>
+
+	* gdb.arch/aarch64-pauth.exp: Recognize optional PAC output.
+
 2020-02-27  Tom de Vries  <tdevries@suse.de>
 
 	* config/sid.exp: Remove unused globals.
diff --git a/gdb/testsuite/gdb.arch/aarch64-pauth.exp b/gdb/testsuite/gdb.arch/aarch64-pauth.exp
index 816e58b..264bfce 100644
--- a/gdb/testsuite/gdb.arch/aarch64-pauth.exp
+++ b/gdb/testsuite/gdb.arch/aarch64-pauth.exp
@@ -40,4 +40,9 @@ gdb_breakpoint [ gdb_get_line_number "break here" ]
 gdb_continue_to_breakpoint "break here" ".*break here.*"
 
 # Ensure we can get a full backtrace, despite the address signing.
-gdb_test "bt" "^bt\r\n#0 +bar *\\(b=9\\) +at.*\r\n#1 +0x\[0-9a-f\]* +in +foo \\(a=5\\).*\r\n#2 +0x\[0-9a-f\]* +in +main \\(\\).*" "backtrace"
+gdb_test "bt" \
+    [multi_line \
+	"#0\[ \t\]+bar \\(b=9\\) at \[^\r\n\]+" \
+	"#1\[ \t\]+$hex (\\\[PAC\\\] )?in foo \\(a=5\\) at \[^\r\n\]+" \
+	"#2\[ \t\]+$hex (\\\[PAC\\\] )?in main \\(\\) at \[^\r\n\]+" ] \
+    "backtrace"