From 88bbeca9d5e9429dbd2a11d754f24d649b8e5488 Mon Sep 17 00:00:00 2001 From: Hui Zhu Date: Mon, 24 Mar 2014 19:30:50 +0000 Subject: [PATCH] Fix PR breakpoints/16101: gdb.base/dprintf.exp agent-printf failures with non-Z0-supporting gdbservers After a previous patch that was committed by Pedro (0000e5cc), trying to set a dprintf with with a GDBserver that doesn't support agent commands at all now throws an error. But the dprintf tests still fail with some GDBserver targets because they doesn't try to handle the case of the server reporting support for breakpoint commands, but not be able to use those in combination with Z0 (because Z0 isn't actually supported, for example): FAIL: gdb.base/dprintf.exp: 1st dprintf, agent FAIL: gdb.base/dprintf.exp: 2nd dprintf, agent FAIL: gdb.base/dprintf.exp: dprintf info 2 (pattern 4) Similarly for the MI test. This patch makes the tests handle this scenario. Tested with native, and native gdbserver on x86_64 Fedora 17. Also tested with the native-gdbserver.exp board hacked with: set GDBFLAGS "${GDBFLAGS} -ex \"set remote breakpoint-commands off\"" (actually, "set remote breakpoint-commands off" is presently broken, so this was on top of a fix for that command.) which results in: (gdb) PASS: gdb.base/dprintf.exp: 2nd dprintf, gdb set dprintf-style agent warning: Target cannot run dprintf commands, falling back to GDB printf warning: Target cannot run dprintf commands, falling back to GDB printf (gdb) UNSUPPORTED: gdb.base/dprintf.exp: set dprintf style to agent gdb.sum: Running target native-gdbserver Running ../../../src/gdb/testsuite/gdb.base/dprintf.exp ... PASS: gdb.base/dprintf.exp: dprintf PASS: gdb.base/dprintf.exp: dprintf foo PASS: gdb.base/dprintf.exp: dprintf 29 PASS: gdb.base/dprintf.exp: dprintf foo,"At foo entry\n" PASS: gdb.base/dprintf.exp: ignore $bpnum 1 PASS: gdb.base/dprintf.exp: dprintf 26,"arg=%d, g=%d\n", arg, g PASS: gdb.base/dprintf.exp: dprintf info 1 PASS: gdb.base/dprintf.exp: break 27 PASS: gdb.base/dprintf.exp: 1st dprintf, gdb PASS: gdb.base/dprintf.exp: 2nd dprintf, gdb UNSUPPORTED: gdb.base/dprintf.exp: set dprintf style to agent PASS: gdb.base/dprintf.exp: Set dprintf style to an unrecognized type And also with the native-gdbserver.exp board hacked with: set GDBFLAGS "${GDBFLAGS} -ex \"set remote Z-packet off\"" which results in: (gdb) continue Continuing. Warning: Cannot insert breakpoint 3: Target doesn't support breakpoints that have target side commands. Cannot insert breakpoint 4: Target doesn't support breakpoints that have target side commands. (gdb) UNSUPPORTED: gdb.base/dprintf.exp: 1st dprintf, agent gdb.sum: Running target native-gdbserver Running ../../../src/gdb/testsuite/gdb.base/dprintf.exp ... PASS: gdb.base/dprintf.exp: dprintf PASS: gdb.base/dprintf.exp: dprintf foo PASS: gdb.base/dprintf.exp: dprintf 29 PASS: gdb.base/dprintf.exp: dprintf foo,"At foo entry\n" PASS: gdb.base/dprintf.exp: ignore $bpnum 1 PASS: gdb.base/dprintf.exp: dprintf 26,"arg=%d, g=%d\n", arg, g PASS: gdb.base/dprintf.exp: dprintf info 1 PASS: gdb.base/dprintf.exp: break 27 PASS: gdb.base/dprintf.exp: 1st dprintf, gdb PASS: gdb.base/dprintf.exp: 2nd dprintf, gdb PASS: gdb.base/dprintf.exp: set dprintf style to agent UNSUPPORTED: gdb.base/dprintf.exp: 1st dprintf, agent PASS: gdb.base/dprintf.exp: Set dprintf style to an unrecognized type (One of the new comments mentions breakpoint always-inserted mode. Actually testing with breakpoint always-inserted mode fails these dprintf tests, due to the way they are written. But that'll take a more substancial rewrite of the tests, so I'm leaving that for another day.) gdb/testsuite/ 2014-03-24 Hui Zhu Pedro Alves PR breakpoints/16101 * gdb.base/dprintf.exp: Use unsupported rather than changing the test pass/fail messages. Detect missing support for dprintf when breakpoints are actually inserted. * gdb.base/mi-dprintf.exp: Detect missing support for dprintf when breakpoints are actually inserted. * lib/mi-support.exp (mi_run_cmd_full): Return -1 if continue fails. --- gdb/testsuite/ChangeLog | 12 +++++++ gdb/testsuite/gdb.base/dprintf.exp | 53 ++++++++++++++++++++--------- gdb/testsuite/gdb.mi/mi-dprintf.exp | 45 ++++++++++++++---------- gdb/testsuite/lib/mi-support.exp | 1 + 4 files changed, 77 insertions(+), 34 deletions(-) diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index 88ba2a322d6..9b5ce14c597 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,15 @@ +2014-03-24 Hui Zhu + Pedro Alves + + PR breakpoints/16101 + * gdb.base/dprintf.exp: Use unsupported rather than changing the + test pass/fail messages. Detect missing support for dprintf when + breakpoints are actually inserted. + * gdb.base/mi-dprintf.exp: Detect missing support for dprintf when + breakpoints are actually inserted. + * lib/mi-support.exp (mi_run_cmd_full): Return -1 if continue + fails. + 2014-03-24 Jan Kratochvil * gdb.base/gdb-sigterm.exp (do_test): Remove "set debug lin-lwp 1". diff --git a/gdb/testsuite/gdb.base/dprintf.exp b/gdb/testsuite/gdb.base/dprintf.exp index cb21d2edead..a0405801080 100644 --- a/gdb/testsuite/gdb.base/dprintf.exp +++ b/gdb/testsuite/gdb.base/dprintf.exp @@ -96,15 +96,20 @@ if ![target_info exists gdb,noinferiorio] { "2nd dprintf, fprintf" } +# Now test the "agent" style. + set target_can_dprintf 1 -set msg "Set dprintf style to agent" +set msg "set dprintf style to agent" gdb_test_multiple "set dprintf-style agent" $msg { -re "warning: Target cannot run dprintf commands.*\r\n$gdb_prompt $" { + + # The target reports that it doesn't support target side + # commands at all. set target_can_dprintf 0 - pass "$msg - cannot do" + unsupported "$msg" } -re ".*$gdb_prompt $" { - pass "$msg - can do" + pass "$msg" } } @@ -113,20 +118,36 @@ if $target_can_dprintf { gdb_test "" "Breakpoint" - gdb_test "continue" "Breakpoint \[0-9\]+, foo .*" "1st dprintf, agent" - - gdb_test "continue" "Breakpoint \[0-9\]+, foo .*" "2nd dprintf, agent" + # Even if the the target reports that it does support target side + # commands, we can only tell that it supports them in combination + # with a particular breakpoint type (Z0, Z1, etc.) when we try to + # insert the breakpoint. When "set breakpoint always-inserted is + # off", that'll be on next continue. + set msg "1st dprintf, agent" + gdb_test_multiple "continue" $msg { + -re "Warning:.*Target doesn't support breakpoints that have target side commands.*\r\n$gdb_prompt $" { + set target_can_dprintf 0 + unsupported "$msg" + } + -re "Breakpoint \[0-9\]+, foo .*$gdb_prompt $" { + pass "$msg" + } + } - gdb_test_sequence "info breakpoints" "dprintf info 2" { - "\[\r\n\]Num Type Disp Enb Address +What" - "\[\r\n\]2 breakpoint" - "\[\r\n\]\tbreakpoint already hit 2 times" - "\[\r\n\]3 dprintf" - "\[\r\n\]\tbreakpoint already hit 2 times" - "\[\r\n\] agent-printf \"At foo entry\\\\n\"" - "\[\r\n\]4 dprintf" - "\[\r\n\]\tbreakpoint already hit 2 times" - "\[\r\n\] agent-printf \"arg=%d, g=%d\\\\n\", arg, g" + if $target_can_dprintf { + gdb_test "continue" "Breakpoint \[0-9\]+, foo .*" "2nd dprintf, agent" + + gdb_test_sequence "info breakpoints" "dprintf info 2" { + "\[\r\n\]Num Type Disp Enb Address +What" + "\[\r\n\]2 breakpoint" + "\[\r\n\]\tbreakpoint already hit 2 times" + "\[\r\n\]3 dprintf" + "\[\r\n\]\tbreakpoint already hit 2 times" + "\[\r\n\] agent-printf \"At foo entry\\\\n\"" + "\[\r\n\]4 dprintf" + "\[\r\n\]\tbreakpoint already hit 2 times" + "\[\r\n\] agent-printf \"arg=%d, g=%d\\\\n\", arg, g" + } } } diff --git a/gdb/testsuite/gdb.mi/mi-dprintf.exp b/gdb/testsuite/gdb.mi/mi-dprintf.exp index af334cf2d7b..983acce2e35 100644 --- a/gdb/testsuite/gdb.mi/mi-dprintf.exp +++ b/gdb/testsuite/gdb.mi/mi-dprintf.exp @@ -140,30 +140,39 @@ gdb_expect { } if $target_can_dprintf { - mi_run_cmd + if {[mi_run_cmd] < 0} { + # This likely means we failed to use target side commands in + # combination with software breakpoints. IOW, the target + # likely doesn't support target-side software breakpoints. + set target_can_dprintf 0 + unsupported "send dprintf to target" + } - mi_expect_stop ".*" ".*" ".*" ".*" ".*" "" "mi expect stop" + if $target_can_dprintf { + mi_expect_stop ".*" ".*" ".*" ".*" ".*" "" "mi expect stop" - mi_send_resuming_command "exec-continue" "mi 1st dprintf continue, agent" - mi_expect_stop ".*" "foo" ".*" ".*" ".*" "" "mi 1st dprintf, agent" + mi_send_resuming_command "exec-continue" "mi 1st dprintf continue, agent" + mi_expect_stop ".*" "foo" ".*" ".*" ".*" "" "mi 1st dprintf, agent" - mi_send_resuming_command "exec-continue" "mi 2nd dprintf continue, agent" + mi_send_resuming_command "exec-continue" "mi 2nd dprintf continue, agent" - # The =breakpoint-modified text is a part of the "-exec-continue" output. - set msg "mi info dprintf second time" - gdb_expect { - -re "=breakpoint-modified," { - pass $msg - } - -re ".*$mi_gdb_prompt$" { - fail "$msg" - } - timeout { - fail "$msg" + # The =breakpoint-modified text is a part of the + # "-exec-continue" output. + set msg "mi info dprintf second time" + gdb_expect { + -re "=breakpoint-modified," { + pass $msg + } + -re ".*$mi_gdb_prompt$" { + fail "$msg" + } + timeout { + fail "$msg" + } } - } - mi_expect_stop ".*" "foo" ".*" ".*" ".*" "" "mi 2nd dprintf, agent" + mi_expect_stop ".*" "foo" ".*" ".*" ".*" "" "mi 2nd dprintf, agent" + } } mi_gdb_test "set dprintf-style foobar" ".*error.*" "mi set dprintf style to an unrecognized type" diff --git a/gdb/testsuite/lib/mi-support.exp b/gdb/testsuite/lib/mi-support.exp index 213073acba9..7c234c010b2 100644 --- a/gdb/testsuite/lib/mi-support.exp +++ b/gdb/testsuite/lib/mi-support.exp @@ -843,6 +843,7 @@ proc mi_run_cmd_full {use_mi_command args} { send_gdb "${run_prefix}continue\n" gdb_expect 60 { -re "${run_match}\\^running\[\r\n\]+\\*running,thread-id=\"\[^\"\]+\"\r\n$mi_gdb_prompt" {} + -re "${run_match}\\^error.*$mi_gdb_prompt" {return -1} default {} } return 0 -- 2.30.2