http://sourceware.org/ml/gdb-patches/2016-01/msg00142.html
Subject: [testsuite patch] Regression for foll-vfork.exp  [Re: [PATCH] Remove HP-UX reference in foll-vfork.exp]


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On Tue, 22 Dec 2015 16:53:23 +0100, Simon Marchi wrote:
> Thanks, pushed.

fe33faff35a8ee19db823149e764e3373e603bb9 is the first bad commit
commit fe33faff35a8ee19db823149e764e3373e603bb9
Author: Simon Marchi <simon.marchi@ericsson.com>
Date:   Tue Dec 22 10:52:31 2015 -0500
    Remove HP-UX reference in foll-vfork.exp

FAIL: gdb.base/foll-vfork.exp: exec: vfork parent follow, finish after tcatch vfork: continue to vfork
FAIL: gdb.base/foll-vfork.exp: exec: vfork child follow, finish after tcatch vfork: continue to vfork
FAIL: gdb.base/foll-vfork.exp: exit: vfork parent follow, finish after tcatch vfork: continue to vfork
FAIL: gdb.base/foll-vfork.exp: exit: vfork child follow, finish after tcatch vfork: continue to vfork

It happens for plain gdb.base/foll-vfork.exp runtest on Fedora 23 x86_64.

-Temporary catchpoint 2 (vforked process 24562), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
+Temporary catchpoint 2 (vforked process 25345), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
 52             pushq   %rdi^M
 Current language:  auto^M
 The current source language is "auto; currently asm".^M
-(gdb) PASS: gdb.base/foll-vfork.exp: exec: vfork parent follow, finish after tcatch vfork: continue to vfork
+(gdb) FAIL: gdb.base/foll-vfork.exp: exec: vfork parent follow, finish after tcatch vfork: continue to vfork

-Temporary catchpoint 2 (vforked process 24629), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
+Temporary catchpoint 2 (vforked process 25411), vfork () at ../sysdeps/unix/sysv/linux/x86_64/vfork.S:52^M
 52             pushq   %rdi^M
 Current language:  auto^M
 The current source language is "auto; currently asm".^M
-(gdb) PASS: gdb.base/foll-vfork.exp: exec: vfork child follow, finish after tcatch vfork: continue to vfork
+(gdb) FAIL: gdb.base/foll-vfork.exp: exec: vfork child follow, finish after tcatch vfork: continue to vfork


So I have reverted it and just simplified the comment, OK for check-in?

The third case is not necessary during testing but I have changed back all the
3 cases.


Jan

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gdb/testsuite/ChangeLog
2016-01-08  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.base/foll-vfork.exp (tcatch_vfork_then_parent_follow)
	(tcatch_vfork_then_child_follow_exec)
	(tcatch_vfork_then_child_follow_exit): Revert back DWARF vfork
	identification.

diff --git a/gdb/testsuite/gdb.base/foll-vfork.exp b/gdb/testsuite/gdb.base/foll-vfork.exp
index efa1b39..ebbe4ad 100644
--- a/gdb/testsuite/gdb.base/foll-vfork.exp
+++ b/gdb/testsuite/gdb.base/foll-vfork.exp
@@ -222,8 +222,17 @@ proc tcatch_vfork_then_parent_follow {} {
    gdb_test_no_output "set follow-fork parent"
 
    gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
-   gdb_test "continue" "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*" \
-	"continue to vfork"
+
+   # It may stop in either "vfork" or "_vfork".
+   set test "continue to vfork"
+   gdb_test_multiple "continue" $test {
+      -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
+	  pass $test
+      }
+      -re "vfork \\(\\) at.*$gdb_prompt " {
+	  pass $test
+      }
+   }
 
    set linenum [gdb_get_line_number "pid = vfork ();"]
    set test "finish"
@@ -254,8 +263,17 @@ proc tcatch_vfork_then_child_follow_exec {} {
    gdb_test_no_output "set follow-fork child"
 
    gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
-   gdb_test "continue" "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*" \
-	"continue to vfork"
+
+   # It may stop in either "vfork" or "_vfork".
+   set test "continue to vfork"
+   gdb_test_multiple "continue" $test {
+      -re "vfork \\(\\) at .*$gdb_prompt $" {
+	  pass $test
+      }
+      -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
+	  pass $test
+      }
+   }
 
    set linenum1 [gdb_get_line_number "pid = vfork ();"]
    set linenum2 [gdb_get_line_number "printf(\"Hello from vforked-prog" ${srcfile2}]
@@ -290,8 +308,17 @@ proc tcatch_vfork_then_child_follow_exit {} {
    gdb_test_no_output "set follow-fork child"
 
    gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
-   gdb_test "continue" "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*" \
-	"continue to vfork"
+
+   # It may stop in either "vfork" or "_vfork".
+   set test "continue to vfork"
+   gdb_test_multiple "continue" $test {
+      -re "vfork \\(\\) at .*$gdb_prompt $" {
+	  pass $test
+      }
+      -re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
+	  pass $test
+      }
+   }
 
    set test "finish"
    gdb_test_multiple "finish" $test {

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