[binutils-gdb] [gdb/testsuite] Fix gdb.base/watchpoint-reuse-slot.exp with gcc-8

[Tom de Vries <vries@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=0d8683a32122f0027d2ab64082d1f9fced98d599

commit 0d8683a32122f0027d2ab64082d1f9fced98d599
Author: Tom de Vries <tdevries@suse.de>
Date:   Wed May 6 14:27:36 2020 +0200

    [gdb/testsuite] Fix gdb.base/watchpoint-reuse-slot.exp with gcc-8
    
    When running test-case gdb.base/watchpoint-reuse-slot.exp with gcc-8 instead
    of gcc-7, we have:
    ...
     (gdb) PASS: $conf: watch *(buf.byte + 0 + 0)@1
     stepi^M
    -0x00000000004004b9      34        for (i = 0; i < 100000; i++);^M
    +34        for (i = 0; i < 100000; i++);^M
    -(gdb) PASS: $conf: stepi advanced
    +(gdb) FAIL: $conf: stepi advanced
    ...
    where $conf is "gdb.base/watchpoint-reuse-slot.exp: hw-watch: always-inserted
    off: watch x watch: : width 1, iter 0: base + 0".
    
    This is due to the fact that gcc-8 generates more precise line info, making
    the instruction at 0x4004b9 a "recommended breakpoint location", such that gdb
    no longer prints the instruction address.
    
    Fix this by getting the instruction address by printing $pc.
    
    Tested on x86_64-linux.
    
    gdb/testsuite/ChangeLog:
    
    2020-05-06  Tom de Vries  <tdevries@suse.de>
    
            * gdb.base/watchpoint-reuse-slot.exp (stepi): Print $pc to get current
            address.

Diff:
---
 gdb/testsuite/ChangeLog                          | 5 +++++
 gdb/testsuite/gdb.base/watchpoint-reuse-slot.exp | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index fde713527d6..d808217ad57 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-06  Tom de Vries  <tdevries@suse.de>
+
+	* gdb.base/watchpoint-reuse-slot.exp (stepi): Print $pc to get current
+	address.
+
 2020-05-06  Tom de Vries  <tdevries@suse.de>
 
 	* gdb.base/watchpoint-reuse-slot.exp: Fix incorrect assignment.
diff --git a/gdb/testsuite/gdb.base/watchpoint-reuse-slot.exp b/gdb/testsuite/gdb.base/watchpoint-reuse-slot.exp
index 83b970380ca..3d3d3c479d5 100644
--- a/gdb/testsuite/gdb.base/watchpoint-reuse-slot.exp
+++ b/gdb/testsuite/gdb.base/watchpoint-reuse-slot.exp
@@ -66,8 +66,8 @@ proc stepi {} {
     set srcline "  for (i = 0; i < 100000; i++); /* stepi line */"
     set test "stepi advanced"
     gdb_test_multiple "stepi" $test {
-	-re "($hex).*[string_to_regexp $srcline]\r\n$gdb_prompt $" {
-	    set addr $expect_out(1,string)
+	-re -wrap "[string_to_regexp $srcline]" {
+	    set addr [get_valueof "/x" "\$pc" "0"]
 	    if {$addr != $cur_addr} {
 		pass $test
 	    } else {