2004-04-23 Andrew Cagney <cagney@redhat.com>
* gdb.base/call-sc.exp: New test of scalar call/return values. * gdb.base/call-sc.c: Ditto.
This commit is contained in:
Andrew Cagney
parent
dcff600952
commit
71d7dd7cc9
3 changed files with 575 additions and 0 deletions
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@ -1,3 +1,8 @@
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2004-04-23 Andrew Cagney <cagney@redhat.com>
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* gdb.base/call-sc.exp: New test of scalar call/return values.
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* gdb.base/call-sc.c: Ditto.
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2004-04-23 Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
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* gdb.threads/manythreads.c: Reduce thread stack size.
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83
gdb/testsuite/gdb.base/call-sc.c
Normal file
83
gdb/testsuite/gdb.base/call-sc.c
Normal file
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@ -0,0 +1,83 @@
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/* This testcase is part of GDB, the GNU debugger.
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Copyright 2004 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
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
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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*/
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/* Useful abreviations. */
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typedef void t;
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typedef char tc;
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typedef short ts;
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typedef int ti;
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typedef long tl;
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typedef long long tll;
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typedef float tf;
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typedef double td;
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typedef long double tld;
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typedef enum { e = '1' } te;
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/* Force the type of each field. */
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#ifndef T
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typedef t T;
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#endif
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T foo = '1', L;
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T fun()
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{
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return foo;
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}
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#ifdef PROTOTYPES
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void Fun(T foo)
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#else
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void Fun(foo)
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T foo;
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#endif
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{
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L = foo;
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}
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zed ()
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{
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L = 'Z';
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}
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int main()
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{
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#ifdef usestubs
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set_debug_traps();
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breakpoint();
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#endif
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int i;
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Fun(foo);
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/* An infinite loop that first clears all the variables and then
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calls the function. This "hack" is to make re-testing easier -
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"advance fun" is guaranteed to have always been preceeded by a
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global variable clearing zed call. */
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zed ();
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while (1)
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{
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L = fun ();
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zed ();
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}
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return 0;
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}
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487
gdb/testsuite/gdb.base/call-sc.exp
Normal file
487
gdb/testsuite/gdb.base/call-sc.exp
Normal file
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@ -0,0 +1,487 @@
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# This testcase is part of GDB, the GNU debugger.
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# Copyright 2004 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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# Test "return", "finish", and "call" of functions that a scalar (int,
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# float, enum) and/or take a single scalar parameter.
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if $tracelevel then {
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strace $tracelevel
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}
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set prms_id 0
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set bug_id 0
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# Some targets can't call functions, so don't even bother with this
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# test.
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if [target_info exists gdb,cannot_call_functions] {
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setup_xfail "*-*-*"
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fail "This target can not call functions"
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continue
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}
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set testfile "call-sc"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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|
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# Create and source the file that provides information about the
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# compiler used to compile the test case.
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||||
|
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if [get_compiler_info ${binfile}] {
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return -1;
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}
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||||
|
||||
# Use the file name, compiler and tuples to set up any needed KFAILs.
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|
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proc setup_kfails { file tuples bug } {
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global testfile
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if [string match $file $testfile] {
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foreach f $tuples { setup_kfail $f $bug }
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}
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}
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proc setup_compiler_kfails { file compiler format tuples bug } {
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global testfile
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if {[string match $file $testfile] && [test_compiler_info $compiler] && [test_debug_format $format]} {
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foreach f $tuples { setup_kfail $f $bug }
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}
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}
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# Compile a variant of scalars.c using TYPE to specify the type of the
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# parameter and return-type. Run the compiled program up to "main".
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# Also updates the global "testfile" to reflect the most recent build.
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proc start_scalars_test { type } {
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global testfile
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global srcfile
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global binfile
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global objdir
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global subdir
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global srcdir
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global gdb_prompt
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global expect_out
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# Create the additional flags
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set flags "debug additional_flags=-DT=${type}"
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set testfile "call-sc-${type}"
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "${flags}"] != "" } {
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# built the second test case since we can't use prototypes
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warning "Prototypes not supported, rebuilding with -DNO_PROTOTYPES"
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "${flags} additional_flags=-DNO_PROTOTYPES"] != "" } {
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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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}
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# Start with a fresh gdb.
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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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# Make certain that the output is consistent
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gdb_test "set print sevenbit-strings" "" \
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"set print sevenbit-strings; ${testfile}"
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gdb_test "set print address off" "" \
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"set print address off; ${testfile}"
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gdb_test "set width 0" "" \
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"set width 0; ${testfile}"
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# Advance to main
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if { ![runto_main] } then {
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gdb_suppress_tests;
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}
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# Get the debug format
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get_debug_format
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# check that type matches what was passed in
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set test "ptype; ${testfile}"
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set foo_t "xxx"
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gdb_test_multiple "ptype ${type}" "${test}" {
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-re "type = (\[^\\r\\n\]*).*$gdb_prompt $" {
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set foo_t "$expect_out(1,string)"
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pass "$test (${foo_t})"
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}
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}
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gdb_test "ptype foo" "type = ${foo_t}" "ptype foo; ${testfile} $expect_out(1,string)"
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}
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|
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# Given N (0..25), return the corresponding alphabetic letter in lower
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# or upper case. This is ment to be i18n proof.
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proc i2a { n } {
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return [string range "abcdefghijklmnopqrstuvwxyz" $n $n]
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}
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proc I2A { n } {
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return [string toupper [i2a $n]]
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}
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||||
|
||||
|
||||
# Use the file name, compiler and tuples to set up any needed KFAILs.
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||||
proc setup_kfails { file tuples bug } {
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global testfile
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if [string match $file $testfile] {
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foreach f $tuples { setup_kfail $f $bug }
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||||
}
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||||
}
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||||
|
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proc setup_compiler_kfails { file compiler format tuples bug } {
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global testfile
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if {[string match $file $testfile] && [test_compiler_info $compiler] && [test_debug_format $format]} {
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foreach f $tuples { setup_kfail $f $bug }
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}
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}
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# Test GDB's ability to make inferior function calls to functions
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# returning (or passing) in a single scalar.
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# start_scalars_test() will have previously built a program with a
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# specified scalar type. To ensure robustness of the output, "p/c" is
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# used.
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# This tests the code paths "which return-value convention?" and
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# "extract return-value from registers" called by "infcall.c".
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proc test_scalar_calls { } {
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global testfile
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global gdb_prompt
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# Check that GDB can always extract a scalar-return value from an
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# inferior function call. Since GDB always knows the location of
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# an inferior function call's return value these should never fail
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# Implemented by calling the parameterless function "fun" and then
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# examining the return value printed by GDB.
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set tests "call ${testfile}"
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# Call fun, checking the printed return-value.
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gdb_test "p/c fun()" "= 49 '1'" "p/c fun(); ${tests}"
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# Check that GDB can always pass a structure to an inferior function.
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# This test can never fail.
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# Implemented by calling the one parameter function "Fun" which
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# stores its parameter in the global variable "L". GDB then
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# examining that global to confirm that the value is as expected.
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gdb_test "call Fun(foo)" "" "call Fun(foo); ${tests}"
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gdb_test "p/c L" " = 49 '1'" "p/c L; ${tests}"
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}
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# Test GDB's ability to both return a function (with "return" or
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# "finish") and correctly extract/store any corresponding
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# return-value.
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||||
# Check that GDB can consistently extract/store structure return
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# values. There are two cases - returned in registers and returned in
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# memory. For the latter case, the return value can't be found and a
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# failure is "expected". However GDB must still both return the
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# function and display the final source and line information.
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# N identifies the number of elements in the struct that will be used
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# for the test case. FAILS is a list of target tuples that will fail
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||||
# this test.
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||||
|
||||
# This tests the code paths "which return-value convention?", "extract
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||||
# return-value from registers", and "store return-value in registers".
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||||
# Unlike "test struct calls", this test is expected to "fail" when the
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# return-value is in memory (GDB can't find the location). The test
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# is in three parts: test "return"; test "finish"; check that the two
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# are consistent. GDB can sometimes work for one command and not the
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# other.
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proc test_scalar_returns { } {
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global gdb_prompt
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global testfile
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||||
|
||||
set tests "return ${testfile}"
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||||
|
||||
|
||||
# Check that "return" works.
|
||||
|
||||
# GDB must always force the return of a function that has
|
||||
# a struct result. Dependant on the ABI, it may, or may not be
|
||||
# possible to store the return value in a register.
|
||||
|
||||
# The relevant code looks like "L{n} = fun{n}()". The test forces
|
||||
# "fun{n}" to "return" with an explicit value. Since that code
|
||||
# snippet will store the the returned value in "L{n}" the return
|
||||
# is tested by examining "L{n}". This assumes that the
|
||||
# compiler implemented this as fun{n}(&L{n}) and hence that when
|
||||
# the value isn't stored "L{n}" remains unchanged. Also check for
|
||||
# consistency between this and the "finish" case.
|
||||
|
||||
# Get into a call of fun
|
||||
gdb_test "advance fun" \
|
||||
"fun .*\[\r\n\]+\[0-9\].*return foo.*" \
|
||||
"advance to fun for return; ${tests}"
|
||||
|
||||
# Check that the program invalidated the relevant global.
|
||||
gdb_test "p/c L" " = 90 'Z'" "zed L for return; ${tests}"
|
||||
|
||||
# Force the "return". This checks that the return is always
|
||||
# performed, and that GDB correctly reported this to the user.
|
||||
# GDB 6.0 and earlier, when the return-value's location wasn't
|
||||
# known, both failed to print a final "source and line" and misplaced
|
||||
# the frame ("No frame").
|
||||
|
||||
# The test is writen so that it only reports one FAIL/PASS for the
|
||||
# entire operation. The value returned is checked further down.
|
||||
# "return_value_unknown", if non-empty, records why GDB realised
|
||||
# that it didn't know where the return value was.
|
||||
|
||||
set test "return foo; ${tests}"
|
||||
set return_value_unknown 0
|
||||
set return_value_unimplemented 0
|
||||
setup_kfails call-sc-tld i*86-*-* gdb/1623
|
||||
gdb_test_multiple "return foo" "${test}" {
|
||||
-re "The location" {
|
||||
# Ulgh, a struct return, remember this (still need prompt).
|
||||
set return_value_unknown 1
|
||||
exp_continue
|
||||
}
|
||||
-re "A structure or union" {
|
||||
# Ulgh, a struct return, remember this (still need prompt).
|
||||
set return_value_unknown 1
|
||||
# Double ulgh. Architecture doesn't use return_value and
|
||||
# hence hasn't implemented small structure return.
|
||||
set return_value_unimplemented 1
|
||||
exp_continue
|
||||
}
|
||||
-re "Make fun return now.*y or n. $" {
|
||||
gdb_test_multiple "y" "${test}" {
|
||||
-re "L *= fun.*${gdb_prompt} $" {
|
||||
# Need to step off the function call
|
||||
gdb_test "next" "zed.*" "${test}"
|
||||
}
|
||||
-re "L[expr + 1] *= fun[expr + 1].*${gdb_prompt} $" {
|
||||
pass "${test}"
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
# Check that the return-value is as expected. At this stage we're
|
||||
# just checking that GDB has returned a value consistent with
|
||||
# "return_value_unknown" set above.
|
||||
|
||||
set test "value foo returned; ${tests}"
|
||||
setup_kfails call-sc-tc x86_64-*-* gdb/1624
|
||||
setup_kfails call-sc-ts x86_64-*-* gdb/1624
|
||||
setup_kfails call-sc-ti x86_64-*-* gdb/1624
|
||||
setup_kfails call-sc-tl x86_64-*-* gdb/1624
|
||||
setup_kfails call-sc-tll x86_64-*-* gdb/1624
|
||||
setup_kfails call-sc-tld x86_64-*-* gdb/1624
|
||||
setup_kfails call-sc-te x86_64-*-* gdb/1624
|
||||
setup_kfails call-sc-tf i*86-*-* gdb/1623
|
||||
setup_kfails call-sc-td i*86-*-* gdb/1623
|
||||
setup_kfails call-sc-tld i*86-*-* gdb/1623
|
||||
gdb_test_multiple "p/c L" "${test}" {
|
||||
-re " = 49 '1'.*${gdb_prompt} $" {
|
||||
if $return_value_unknown {
|
||||
# This contradicts the above claim that GDB didn't
|
||||
# know the location of the return-value.
|
||||
fail "${test}"
|
||||
} else {
|
||||
pass "${test}"
|
||||
}
|
||||
}
|
||||
-re " = 90 .*${gdb_prompt} $" {
|
||||
if $return_value_unknown {
|
||||
# The struct return case. Since any modification
|
||||
# would be by reference, and that can't happen, the
|
||||
# value should be unmodified and hence Z is expected.
|
||||
# Is this a reasonable assumption?
|
||||
pass "${test}"
|
||||
} else {
|
||||
# This contradicts the above claim that GDB knew
|
||||
# the location of the return-value.
|
||||
fail "${test}"
|
||||
}
|
||||
}
|
||||
-re ".*${gdb_prompt} $" {
|
||||
if $return_value_unimplemented {
|
||||
# What a suprize. The architecture hasn't implemented
|
||||
# return_value, and hence has to fail.
|
||||
kfail "$test" gdb/1444
|
||||
} else {
|
||||
fail "$test"
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
# Check that a "finish" works.
|
||||
|
||||
# This is almost but not quite the same as "call struct funcs".
|
||||
# Architectures can have subtle differences in the two code paths.
|
||||
|
||||
# The relevant code snippet is "L{n} = fun{n}()". The program is
|
||||
# advanced into a call to "fun{n}" and then that function is
|
||||
# finished. The returned value that GDB prints, reformatted using
|
||||
# "p/c", is checked.
|
||||
|
||||
# Get into "fun()".
|
||||
gdb_test "advance fun" \
|
||||
"fun .*\[\r\n\]+\[0-9\].*return foo.*" \
|
||||
"advance to fun for finish; ${tests}"
|
||||
|
||||
# Check that the program invalidated the relevant global.
|
||||
gdb_test "p/c L" " = 90 'Z'" "zed L for finish; ${tests}"
|
||||
|
||||
# Finish the function, set 'finish_value_unknown" to non-empty if the
|
||||
# return-value was not found.
|
||||
set test "finish foo; ${tests}"
|
||||
set finish_value_unknown 0
|
||||
gdb_test_multiple "finish" "${test}" {
|
||||
-re "Value returned is .*${gdb_prompt} $" {
|
||||
pass "${test}"
|
||||
}
|
||||
-re "Cannot determine contents.*${gdb_prompt} $" {
|
||||
# Expected bad value. For the moment this is ok.
|
||||
set finish_value_unknown 1
|
||||
pass "${test}"
|
||||
}
|
||||
}
|
||||
|
||||
# Re-print the last (return-value) using the more robust
|
||||
# "p/c". If no return value was found, the 'Z' from the previous
|
||||
# check that the variable was cleared, is printed.
|
||||
set test "value foo finished; ${tests}"
|
||||
gdb_test_multiple "p/c" "${test}" {
|
||||
-re " = 49 '1'\[\r\n\]+${gdb_prompt} $" {
|
||||
if $finish_value_unknown {
|
||||
# This contradicts the above claim that GDB didn't
|
||||
# know the location of the return-value.
|
||||
fail "${test}"
|
||||
} else {
|
||||
pass "${test}"
|
||||
}
|
||||
}
|
||||
-re " = 90 'Z'\[\r\n\]+${gdb_prompt} $" {
|
||||
# The value didn't get found. This is "expected".
|
||||
if $finish_value_unknown {
|
||||
pass "${test}"
|
||||
} else {
|
||||
# This contradicts the above claim that GDB did
|
||||
# know the location of the return-value.
|
||||
fail "${test}"
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
# Finally, check that "return" and finish" have consistent
|
||||
# behavior.
|
||||
|
||||
# Since both "return" and "finish" use equivalent "which
|
||||
# return-value convention" logic, both commands should have
|
||||
# identical can/can-not find return-value messages.
|
||||
|
||||
# Note that since "call" and "finish" use common code paths, a
|
||||
# failure here is a strong indicator of problems with "store
|
||||
# return-value" code paths. Suggest looking at "return_value"
|
||||
# when investigating a fix.
|
||||
|
||||
set test "return and finish use same convention; ${tests}"
|
||||
if {$finish_value_unknown == $return_value_unknown} {
|
||||
pass "${test}"
|
||||
} else {
|
||||
kfail gdb/1444 "${test}"
|
||||
}
|
||||
}
|
||||
|
||||
# ABIs pass anything >8 or >16 bytes in memory but below that things
|
||||
# randomly use register and/and structure conventions. Check all
|
||||
# possible sized char scalars in that range. But only a restricted
|
||||
# range of the other types.
|
||||
|
||||
# NetBSD/PPC returns "unnatural" (3, 5, 6, 7) sized scalars in memory.
|
||||
|
||||
# d10v is weird. 5/6 byte scalars go in memory. 2 or more char
|
||||
# scalars go in memory. Everything else is in a register!
|
||||
|
||||
# Test every single char struct from 1..17 in size. This is what the
|
||||
# original "scalars" test was doing.
|
||||
|
||||
start_scalars_test tc
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
|
||||
# Let the fun begin.
|
||||
|
||||
# Assuming that any integer struct larger than 8 bytes goes in memory,
|
||||
# come up with many and varied combinations of a return struct. For
|
||||
# "struct calls" test just beyond that 8 byte boundary, for "struct
|
||||
# returns" test up to that boundary.
|
||||
|
||||
# For floats, assumed that up to two struct elements can be stored in
|
||||
# floating point registers, regardless of their size.
|
||||
|
||||
# The approx size of each structure it is computed assumed that tc=1,
|
||||
# ts=2, ti=4, tl=4, tll=8, tf=4, td=8, tld=16, and that all fields are
|
||||
# naturally aligned. Padding being added where needed. Note that
|
||||
# these numbers are just approx, the d10v has ti=2, a 64-bit has has
|
||||
# tl=8.
|
||||
|
||||
# Approx size: 2, 4, ...
|
||||
start_scalars_test ts
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
# Approx size: 4, 8, ...
|
||||
start_scalars_test ti
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
# Approx size: 4, 8, ...
|
||||
start_scalars_test tl
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
# Approx size: 8, 16, ...
|
||||
start_scalars_test tll
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
# Approx size: 4, 8, ...
|
||||
start_scalars_test tf
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
# Approx size: 8, 16, ...
|
||||
start_scalars_test td
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
# Approx size: 16, 32, ...
|
||||
start_scalars_test tld
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
# Approx size: 4, 8, ...
|
||||
start_scalars_test te
|
||||
test_scalar_calls
|
||||
test_scalar_returns
|
||||
|
||||
return 0
|
||||
Loading…
Reference in a new issue