[binutils-gdb] [gdb/testsuite] Add another xfail case in gdb.python/py-record-btrace.exp

[binutils-gdb] [gdb/testsuite] Add another xfail case in gdb.python/py-record-btrace.exp

[Tom de Vries]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=2c29b1ed19711fa2a16558015e5a6b46a09aefeb

commit 2c29b1ed19711fa2a16558015e5a6b46a09aefeb
Author: Tom de Vries <tdevries@suse.de>
Date:   Wed Mar 1 13:44:04 2023 +0100

    [gdb/testsuite] Add another xfail case in gdb.python/py-record-btrace.exp
    
    I ran into:
    ...
    (gdb) PASS: gdb.python/py-record-btrace.exp: function call: \
      python print(c.prev)
    python print(c == c.next.prev)^M
    Traceback (most recent call last):^M
      File "<string>", line 1, in <module>^M
    AttributeError: 'NoneType' object has no attribute 'prev'^M
    Error while executing Python code.^M
    (gdb) FAIL: gdb.python/py-record-btrace.exp: function call: \
      python print(c == c.next.prev)
    ...
    due to having only 4 insn instead of 100:
    ...
    python print(len(insn))^M
    4^M
    ...
    
    This could be caused by the same hw bug as we already have an xfail for, so
    expand the xfail matching.
    
    Tested on x86_64-linux.
    
    PR testsuite/30185
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30185
    
    Approved-By: Markus T. Metzger <markus.t.metzger@intel.com>

Diff:
---
 gdb/testsuite/gdb.python/py-record-btrace.exp | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.python/py-record-btrace.exp b/gdb/testsuite/gdb.python/py-record-btrace.exp
index 703db0ce8e1..bd397d3c974 100644
--- a/gdb/testsuite/gdb.python/py-record-btrace.exp
+++ b/gdb/testsuite/gdb.python/py-record-btrace.exp
@@ -101,6 +101,25 @@ with_test_prefix "prepare record" {
 	return
     }
 
+    # Also handle the case that we're running into the hw bug without
+    # triggering a decode error.
+    gdb_test_multiple "python print(len(insn))" "" {
+	-re -wrap "100" {
+	    pass $gdb_test_name
+	}
+	-re -wrap "" {
+	    if { $have_xfail } {
+		xfail $gdb_test_name
+		set got_xfail 1
+	    } else {
+		fail $gdb_test_name
+	    }
+	}
+    }
+    if { $got_xfail } {
+	return
+    }
+
     gdb_test_no_output "python call = r.function_call_history"
     gdb_test_no_output "python i = insn\[0\]"
     gdb_test_no_output "python c = call\[0\]"
@@ -138,7 +157,6 @@ with_test_prefix "function call" {
 }
 
 with_test_prefix "list" {
-    gdb_test "python print(len(insn))" "100"
     gdb_test "python print(len(insn\[23:65\]))" "42"
     gdb_test "python print(insn\[17:\]\[2\].number)" "20"
     gdb_test "python print(i in insn)" "True"