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Fix gdb.base/testenv.exp against --target_board=native-extended-gdbserver

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Currently we get:

  Running ..../src/gdb/testsuite/gdb.base/testenv.exp ...
  FAIL: gdb.base/testenv.exp: test no TEST_GDB var
  FAIL: gdb.base/testenv.exp: test with one TEST_GDB var
  FAIL: gdb.base/testenv.exp: test with two TEST_GDB var
  FAIL: gdb.base/testenv.exp: test with one TEST_GDB var, after unset
  FAIL: gdb.base/testenv.exp: test with TEST_GDB_GLOBAL
  FAIL: gdb.base/testenv.exp: test with TEST_GDB_GLOBAL unset

The problem is that the testcase relies on stdio.  While we could fix
this for gdbserver by read output from inferior_spawn_id, a better fix
it to not rely on stdio at all.  That's what this commit does.
Instead, it reads variables off of the inferior to extract the
necessary information.

Along the way, most of the .exp file is reimplemented/cleaned up using
more modern mechanisms.  E.g., with_test_prefix, proc_with_prefix,
save_vars, etc.  Also, a missing check for "is_remote host" is added.

gdb/testsuite/ChangeLog:
2017-10-13  Pedro Alves  <palves@redhat.com>

	* gdb.base/testenv.exp: Check use_gdb_stub instead of is_remote.
	(test_num_test_vars, run_and_count_vars, find_env)
	(test_set_unset_env, test_inherit_env_var): New procedures.
	(top level): Use them.
This commit is contained in:
Pedro Alves
2017-10-12 18:27:20 +01:00
parent dad0c6d2f7
commit 50500caf81
2 changed files with 134 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2017-10-13 Pedro Alves <palves@redhat.com>
* gdb.base/testenv.exp: Check use_gdb_stub instead of is_remote.
(test_num_test_vars, run_and_count_vars, find_env)
(test_set_unset_env, test_inherit_env_var): New procedures.
(top level): Use them.
2017-10-13 Pedro Alves <palves@redhat.com>
* lib/selftest-support.exp (selftest_setup): Extend comments, and

175
gdb/testsuite/gdb.base/testenv.exp
View File

@ -18,9 +18,10 @@
# Check if environment variables are correctly passed to inferiors
#
# There's no support for passing environment variables in the remote protocol.
if { [is_remote target] } {
return 0
# Can't pass environment variables to the inferior if when we connect,
# the inferior is already running.
if [target_info exists use_gdb_stub] {
return
}
standard_testfile .c
@ -32,92 +33,154 @@ if { [prepare_for_testing "failed to prepare" ${binfile} ${srcfile}] } {
return -1
}
# make sure $pc is sane, in case we're talking to a board.
if { ![runto_main] } {
gdb_suppress_tests
# Test that the the inferior sees EXPECTED env vars starting with
# "TEST_GDB".
proc test_num_test_vars {expected message} {
set num [get_integer_valueof "j" -1 "$message, get num vars"]
gdb_assert {$num == $expected} "$message, confirmed"
}
set bp_line [gdb_get_line_number "set breakpoint here"]
gdb_breakpoint $bp_line
# Restart test program, and prepare for another test sequence.
# Returns true on success.
proc run_and_count_vars {} {
global srcfile bp_line
return [runto "$srcfile:$bp_line"]
}
# Find environment variable named VARNAME (peeking inferior variables
# directly), and return its value. Returns "<not found>" if not
# found.
proc find_env {varname} {
global gdb_prompt
for {set i 0} {1} {incr i} {
set test "printf \"var: %s\\n\", envp\[$i\] ? envp\[$i\] : \"\""
set var ""
gdb_test_multiple $test $test {
-re "var: \r\n$gdb_prompt $" {
return "<not found>"
}
-re "var: \(\[^\r\n\]*\)\r\n$gdb_prompt $" {
set var $expect_out(1,string)
}
}
if {[string match "$varname=*" $var]} {
set from [expr [string first "=" $var] + 1]
set to [string length $var]
return [string range $var $from $to]
}
}
}
#
# Test gdb set/unset environment commands.
# Executable lists and counts all environment variables
# The executable lists and counts all environment variables
# starting with TEST_GDB.
proc_with_prefix test_set_unset_env {} {
global binfile
# First test with no TEST_GDB_VAR
gdb_test "continue" \
".*Program found 0 variables starting with TEST_GDB.*" \
"test no TEST_GDB var"
clean_restart $binfile
# First test with no TEST_GDB_VAR.
with_test_prefix "test1" {
if ![run_and_count_vars] {
return
}
test_num_test_vars 0 "no TEST_GDB vars"
}
# Second test with one TEST_GDB_VAR.
with_test_prefix "test2" {
gdb_test_no_output "set env TEST_GDB_VAR1 test1" \
"set TEST_GDB_VAR1"
runto_main
gdb_breakpoint $bp_line
# Second test with one TEST_GDB_VAR
gdb_test "continue" \
".*Program found 1 variables starting with TEST_GDB.*" \
"test with one TEST_GDB var"
if ![run_and_count_vars] {
return
}
test_num_test_vars 1 "one TEST_GDB var"
}
# Third test with two TEST_GDB_VAR.
with_test_prefix "test3" {
gdb_test_no_output "set env TEST_GDB_VAR2 test2" \
"set TEST_GDB_VAR2"
runto_main
gdb_breakpoint $bp_line
if ![run_and_count_vars] {
return
}
# Third test with two TEST_GDB_VAR
gdb_test "continue" \
".*Program found 2 variables starting with TEST_GDB.*" \
"test with two TEST_GDB var"
gdb_test_no_output "unset env TEST_GDB_VAR1" \
"unset TEST_GDB_VAR1"
runto_main
gdb_breakpoint $bp_line
test_num_test_vars 2 "two TEST_GDB var"
}
# Fourth test with one TEST_GDB_VAR left, after one was removed
# with unset command.
gdb_test "continue" \
".*Program found 1 variables starting with TEST_GDB.*" \
"test with one TEST_GDB var, after unset"
with_test_prefix "test4" {
gdb_test_no_output "unset env TEST_GDB_VAR1" \
"unset TEST_GDB_VAR1"
gdb_exit
if ![run_and_count_vars] {
return
}
test_num_test_vars 1 "one TEST_GDB var, after unset"
}
}
proc_with_prefix test_inherit_env_var {} {
global binfile
global bp_line
global env
# This test assumes that the build's environ (where dejagnu runs)
# is the same as the host's (where gdb runs) environ.
if [is_remote host] {
return
}
save_vars {env(TEST_GDB_GLOBAL)} {
set env(TEST_GDB_GLOBAL) "Global environment value"
clean_restart $binfile
# make sure $pc is sane, in case we're talking to a board.
if { ![runto_main] } {
gdb_suppress_tests
}
set bp_line [gdb_get_line_number "set breakpoint here"]
gdb_breakpoint $bp_line
gdb_test "show env" ".*TEST_GDB_GLOBAL=.*" "test passing TEST_GDB_GLOBAL to GDB"
# First test with only inherited TEST_GDB_GLOBAL
gdb_test "continue" \
".*TEST_GDB_GLOBAL=Global environment value.*Program found 1 variables starting with TEST_GDB.*" \
"test with TEST_GDB_GLOBAL"
# First test with only inherited TEST_GDB_GLOBAL.
with_test_prefix "test1" {
if ![run_and_count_vars] {
return
}
gdb_test "show env" ".*TEST_GDB_GLOBAL=.*" \
"test passing TEST_GDB_GLOBAL to GDB"
test_num_test_vars 1 "TEST_GDB_GLOBAL"
set var [find_env "TEST_GDB_GLOBAL"]
gdb_assert {[string equal $var "Global environment value"]} \
"TEST_GDB_GLOBAL found with right value"
}
# Second test with one TEST_GDB_VAR.
with_test_prefix "test2" {
gdb_test_no_output "unset env TEST_GDB_GLOBAL" \
"unset TEST_GDB_GLOBAL"
runto_main
gdb_breakpoint $bp_line
if ![run_and_count_vars] {
return
}
# Second test with one TEST_GDB_VAR
gdb_test "continue" \
".*Program found 0 variables starting with TEST_GDB.*" \
"test with TEST_GDB_GLOBAL unset"
gdb_exit
# Clear environment in case we're doing multiple runs
unset env(TEST_GDB_GLOBAL)
test_num_test_vars 0 "TEST_GDB_GLOBAL is unset"
}
}
}
test_set_unset_env
test_inherit_env_var