221 lines
6.6 KiB
Text
221 lines
6.6 KiB
Text
# Copyright 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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# Please email any bugs, comments, and/or additions to this file to:
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# bug-gdb@prep.ai.mit.edu
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# use this to debug:
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#
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#log_user 1
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# step-test.exp -- Expect script to test stepping in gdb
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if $tracelevel then {
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strace $tracelevel
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}
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set testfile step-test
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set srcfile ${srcdir}/${subdir}/${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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remote_exec build "rm -f ${binfile}"
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if { [gdb_compile "${srcfile}" "${binfile}" executable {debug}] != "" } {
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gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
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}
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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if ![runto_main] then {
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fail "Can't run to main"
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return 0
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}
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# Set a breakpoint at line 45, if stepi then finish fails, we would
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# run to the end of the program, which would mess up the rest of the tests.
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# Vanilla step/next
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#
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gdb_test "next" ".*${decimal}.*x = 1;.*" "next 1"
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gdb_test "step" ".*${decimal}.*y = 2;.*" "step 1"
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# With count
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#
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gdb_test "next 2" ".*${decimal}.*w = w.*2;.*" "next 2"
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gdb_test "step 3" ".*${decimal}.*z = z.*5;.*" "step 3"
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gdb_test "next" ".*${decimal}.*callee.*OVER.*" "next 3"
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# Step over call
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#
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gdb_test "next" ".*${decimal}.*callee.*INTO.*" "next over"
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# Step into call
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#
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gdb_test "step" ".*${decimal}.*myglob.*" "step into"
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# Step out of call
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#
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# I wonder if this is really portable. Are there any caller-saves
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# platforms, on which `finish' will return you to some kind of pop
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# instruction, which is attributed to the line containing the function
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# call?
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# On PA64, we end up at a different instruction than PA32.
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# On IA-64, we also end up on callee instead of on the next line due
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# to the restoration of the global pointer (which is a caller-save).
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if { [istarget "hppa2.0w-hp-hpux*"] || [istarget "ia64-*-*"]} {
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send_gdb "finish\n"
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gdb_expect {
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-re ".*${decimal}.*a.*5.*= a.*3.*$gdb_prompt $" { pass "step out 1" }
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-re ".*${decimal}.*callee.*INTO.*$gdb_prompt $" { pass "step out 2" }
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timeout { fail "step out" }
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}
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} else {
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gdb_test "finish" ".*${decimal}.*a.*5.*= a.*3.*" "step out"
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}
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### Testing nexti and stepi.
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###
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### test_i NAME COMMAND HERE THERE
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###
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### Send COMMAND to gdb over and over, while the output matches the
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### regexp HERE, followed by the gdb prompt. Pass if the output
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### eventually matches the regexp THERE, followed by the gdb prompt;
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### fail if we have to iterate more than a hundred times, we time out
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### talking to gdb, or we get output which is neither HERE nor THERE. :)
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###
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### Use NAME as the name of the test.
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###
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### The exact regexps used are "$HERE.*$gdb_prompt $"
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### and "$THERE.*$gdb_prompt $"
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###
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proc test_i {name command here there} {
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global gdb_prompt
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set i 0
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while 1 {
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send_gdb "${command}\n"
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gdb_expect {
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-re "$here.*$gdb_prompt $" {
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# Okay, we're still on the same line. Just step again.
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}
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-re "$there.*$gdb_prompt $" {
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# We've reached the next line. Rah.
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pass "$name"
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return
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}
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-re "$gdb_prompt $" {
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# We got something else. Fail.
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fail "$name"
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return
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}
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timeout {
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fail "$name (timeout)"
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return
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}
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}
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# Have we gone for too many steps without seeing any progress?
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if {[incr i] >= 100} {
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fail "$name (no progress after 100 steps)"
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return
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}
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}
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}
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test_i "stepi to next line" "stepi" \
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".*${decimal}.*a.*5.* = a.*3" \
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".*${decimal}.*callee.*STEPI"
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test_i "stepi into function" "stepi" \
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".*${decimal}.*callee.*STEPI" \
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".*callee \\(\\) at .*step-test\\.c"
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# Continue to step until we reach the function's body. This makes it
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# more likely that we've actually completed the prologue, so "finish"
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# will work.
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test_i "stepi into function's first source line" "stepi" \
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".*${decimal}.*int callee" \
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".*${decimal}.*myglob.*; return 0;"
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# Have to be careful here, if the finish does not work,
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# then we may run to the end of the program, which
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# will cause erroneous failures in the rest of the tests
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send_gdb "finish\n"
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gdb_expect {
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-re ".*(Program received|Program exited).*$gdb_prompt $" {
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# Oops... We ran to the end of the program... Better reset
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if {![runto_main]} then {
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fail "Can't run to main"
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return 0
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}
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if {![runto step-test.c:45]} {
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fail "Can't run to line 45"
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return 0
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}
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fail "stepi: finish call"
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}
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-re ".*${decimal}.*callee.*NEXTI.*$gdb_prompt $" {
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pass "stepi: finish call"
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}
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-re ".*${decimal}.*callee.*STEPI.*$gdb_prompt $" {
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# On PA64, we end up at a different instruction than PA32.
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# On IA-64, we end up on callee instead of on the following line due
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# to the restoration of the global pointer.
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if { [istarget "hppa2.0w-hp-hpux*"] || [istarget "ia64-*-*"] } {
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pass "stepi: finish call 2"
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} else {
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fail "stepi: finish call 2"
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return
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}
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}
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-re "$gdb_prompt $" {
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# We got something else. Fail.
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fail "stepi: finish call"
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return
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}
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timeout {
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fail "stepi: finish call (timeout)"
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return
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}
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}
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test_i "nexti over function" "nexti" \
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".*${decimal}.*callee.*NEXTI" \
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".*${decimal}.*y = w \\+ z;"
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# On some platforms, if we try to step into a function call that
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# passes a large structure by value, then we actually end up stepping
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# into memcpy, bcopy, or some such --- GCC emits the call to pass the
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# argument. Opinion is bitterly divided about whether this is the
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# right behavior for GDB or not, but we'll catch it here, so folks
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# won't forget about it.
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gdb_test \
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"break [gdb_get_line_number "step-test.exp: large struct by value"]" \
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".*Breakpoint.* at .*" \
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"set breakpoint at call to large_struct_by_value"
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gdb_test "continue" \
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".*Breakpoint ${decimal},.*large_struct_by_value.*" \
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"run to pass large struct"
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gdb_test "step" \
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".*step-test.exp: arrive here 1.*" \
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"large struct by value"
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gdb_continue_to_end "step-test.exp"
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return 0
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