RE: [RFC] adding gdb.pascal subdir

["Pierre Muller" <muller at ics dot u-strasbg dot fr>]

>On Tue, Jul 17, 2007 at 04:22:26PM +0200, Pierre Muller wrote:
>>   A possible work-around would be to fix breakpoints at specific
>> positions in the file, but this would require to re-edit hello.exp
>> each time someone changes hello.pas source. 
>>   I have no idea if this is acceptable.
>
>Take a look at the testsuite function "gdb_get_line_number".  You're
>exactly right that fixing the breakpoints at specific positions is a
>bad idea, but this way they can "float" along with the source.

  I tried to use that and it seems to work partially.
gpc seems to have problems in setting the correct position
for a breakpoint.
  After 'break 10' and 'cont' 
gdb ends up at line 11 :(
  I suspect that this is not specific to gpc,
but it might be related to the fact that default optimizations
are too high, and that thus the debug information is
not completely reliable.

>> The other failure is common to gpc and fpc:
>> (gdb) ptyp 'a simple string' ^M
>>  gives a strange error: 
>> No symbol table is loaded: use "file" command.
>> I have no idea why this happens.
>
>It is probably trying to call malloc to allocate the string.
No, it must be something else:
if I first load the hello executable, 
then it claims:
No symbol "a simple string" in current context.

This probably means that it is still looking for a 
symbol instead of taking it for a constant string.
This is indeed a bug that should be fixed.


  I get 3 errors for gpc and one for fpc
with the files below.
  What should we do?
  Comment out all failing test, or simplify 
them so that they succeed?

  Failing tests are good ways to 
get things fixed, no?
  If we remove all failing tests, chances are higher that
we will not fix them.

Pierre Muller


Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/Makefile.in,v
retrieving revision 1.18
diff -u -p -r1.18 Makefile.in
--- Makefile.in	27 Mar 2007 18:09:35 -0000	1.18
+++ Makefile.in	18 Jul 2007 08:53:29 -0000
@@ -37,7 +37,7 @@ RPATH_ENVVAR = @RPATH_ENVVAR@
 ALL_SUBDIRS = gdb.ada gdb.arch gdb.asm gdb.base gdb.cp gdb.disasm \
 	gdb.dwarf2 \
 	gdb.fortran gdb.server gdb.java gdb.mi \
-	gdb.objc gdb.threads gdb.trace gdb.xml \
+	gdb.objc gdb.pascal gdb.threads gdb.trace gdb.xml \
 	$(SUBDIRS)
 
 EXPECT = `if [ -f $${rootme}/../../expect/expect ] ; then \
Index: configure
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/configure,v
retrieving revision 1.23
diff -u -p -r1.23 configure
--- configure	23 Jan 2007 17:11:54 -0000	1.23
+++ configure	18 Jul 2007 08:53:31 -0000
@@ -3102,7 +3102,7 @@ done
 
 
 
-
ac_config_files="$ac_config_files Makefile gdb.ada/Makefile
gdb.arch/Makefile gdb.asm/Makefile gdb.base/Makefile gdb.cp/Makefile
gdb.disasm/Makefile gdb.dwarf2/Makefile gdb.fortran/Makefile
gdb.server/Makefile gdb.java/Makefile gdb.mi/Makefile gdb.objc/Makefile
gdb.threads/Makefile gdb.trace/Makefile gdb.xml/Makefile"
+
ac_config_files="$ac_config_files Makefile gdb.ada/Makefile
gdb.arch/Makefile gdb.asm/Makefile gdb.base/Makefile gdb.cp/Makefile
gdb.disasm/Makefile gdb.dwarf2/Makefile gdb.fortran/Makefile
gdb.server/Makefile gdb.java/Makefile gdb.mi/Makefile gdb.objc/Makefile
gdb.pascal/Makefile gdb.threads/Makefile gdb.trace/Makefile
gdb.xml/Makefile"
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
Index: configure.ac
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/configure.ac,v
retrieving revision 1.6
diff -u -p -r1.6 configure.ac
--- configure.ac	23 Jan 2007 17:11:55 -0000	1.6
+++ configure.ac	18 Jul 2007 08:53:31 -0000
@@ -115,6 +115,6 @@ AC_OUTPUT([Makefile \
   gdb.arch/Makefile gdb.asm/Makefile gdb.base/Makefile \
   gdb.cp/Makefile gdb.disasm/Makefile gdb.dwarf2/Makefile \
   gdb.fortran/Makefile gdb.server/Makefile \
-  gdb.java/Makefile gdb.mi/Makefile \
-  gdb.objc/Makefile gdb.threads/Makefile gdb.trace/Makefile \
+  gdb.java/Makefile gdb.mi/Makefile gdb.objc/Makefile \  
+  gdb.pascal/Makefile gdb.threads/Makefile gdb.trace/Makefile \
   gdb.xml/Makefile])
Index: gdb.pascal/Makefile.in
===================================================================
RCS file: gdb.pascal/Makefile.in
diff -N gdb.pascal/Makefile.in
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gdb.pascal/Makefile.in	18 Jul 2007 08:53:33 -0000
@@ -0,0 +1,24 @@
+VPATH = @srcdir@
+srcdir = @srcdir@
+
+EXECUTABLES = hello/hello 
+
+MISCELLANEOUS =
+
+all info install-info dvi install uninstall installcheck check:
+	@echo "Nothing to be done for $@..."
+
+clean mostlyclean:
+	-find . -name '*.o' -print | xargs rm -f
+	-find . -name '*.ali' -print | xargs rm -f
+	-find . -name 'b~*.ad[sb]' -print | xargs rm -f
+	-rm -f *~ a.out xgdb *.x *.ci *.tmp
+	-rm -f *~ *.o a.out xgdb *.x *.ci *.tmp
+	-rm -f core core.coremaker coremaker.core corefile $(EXECUTABLES)
+	-rm -f $(MISCELLANEOUS) twice-tmp.c
+
+distclean maintainer-clean realclean: clean
+	-rm -f *~ core
+	-rm -f Makefile config.status config.log
+	-rm -f *-init.exp
+	-rm -fr *.log summary detail *.plog *.sum *.psum site.*
Index: gdb.pascal/hello.exp
===================================================================
RCS file: gdb.pascal/hello.exp
diff -N gdb.pascal/hello.exp
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gdb.pascal/hello.exp	18 Jul 2007 08:53:33 -0000
@@ -0,0 +1,74 @@
+# Copyright 2007 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# 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
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+# USA.  
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+load_lib "pascal.exp"
+
+set testfile "hello"
+set srcfile ${testfile}.pas
+set binfile ${objdir}/${subdir}/${testfile}
+
+if {[gdb_compile_pascal "${srcdir}/${subdir}/${srcfile}" "${binfile}"
executable [list debug ]] != "" } {
+  return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+set bp_location1 [gdb_get_line_number "set breakpoint 1 here"]
+set bp_location2 [gdb_get_line_number "set breakpoint 2 here"]
+
+if { [gdb_breakpoint ${srcfile}:${bp_location1}] } {
+    pass "setting breakpoint 1"
+}
+if { [gdb_breakpoint ${srcfile}:${bp_location2}] } {
+    pass "setting breakpoint 2"
+}
+
+# Verify that "start" lands inside the right procedure.
+if { [gdb_start_cmd] < 0 } {
+    untested start
+    return -1
+}
+
+# This test fails for gpc
+# because debug information for 'main'
+# is in some <implicit code>
+gdb_test "" \
+         ".* at .*hello.pas.*" \
+         "start"
+
+gdb_test "cont" \
+         "Breakpoint .*:${bp_location1}.*" \
+         "Going to first breakpoint"
+gdb_test "print st" \
+	 ".* = ''.*" \
+	 "Empty string check"
+
+# This test also fails for gpc because the program
+# stops after the string has been written
+# while it should stop before writing it 
+gdb_test "cont" \
+	 "Breakpoint .*:${bp_location2}.*" \
+	 "Going to second breakpoint"
+gdb_test "print st" \
+	 ".* = 'Hello, world!'.*" \
+	 "String after assignment check"
Index: gdb.pascal/hello.pas
===================================================================
RCS file: gdb.pascal/hello.pas
diff -N gdb.pascal/hello.pas
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gdb.pascal/hello.pas	18 Jul 2007 08:53:33 -0000
@@ -0,0 +1,15 @@
+program hello;
+
+var
+  st : string;
+
+procedure print_hello;
+begin
+ Writeln('Before assignment'); { set breakpoint 1 here }
+ st:='Hello, world!'; 
+ writeln(st); {set breakpoint 2 here }
+end;
+
+begin
+  print_hello;
+end. 
Index: gdb.pascal/types.exp
===================================================================
RCS file: gdb.pascal/types.exp
diff -N gdb.pascal/types.exp
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gdb.pascal/types.exp	18 Jul 2007 08:53:33 -0000
@@ -0,0 +1,109 @@
+# Copyright 1994, 1995, 1997, 1998, 2007 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# 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
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.  
+
+# Please email any bugs, comments, and/or additions to this file to:
+# bug-gdb@prep.ai.mit.edu
+
+# This file was adapted from old Chill tests by Stan Shebs
+# (shebs@cygnus.com).
+# Adapted to pascal by Pierre Muller
+
+if $tracelevel then {
+	strace $tracelevel
+}
+
+set prms_id 0
+set bug_id 0
+
+# Set the current language to pascal.  This counts as a test.  If it
+# fails, then we skip the other tests.
+
+proc set_lang_pascal {} {
+    global gdb_prompt
+    
+    if [gdb_test "set language pascal" ""] {
+	return 0;
+    }
+
+    if ![gdb_test "show language" ".* source language is \"pascal\".*"] {
+	return 1;
+    } else {
+	return 0;
+    }
+}
+
+proc test_integer_literal_types_accepted {} {
+    global gdb_prompt
+
+    # Test various decimal values.
+    # Should be integer*4 probably.
+    gdb_test "pt 123" "type = int" 
+}
+proc test_character_literal_types_accepted {} {
+    global gdb_prompt
+
+    # Test various character values.
+
+    gdb_test "pt 'a'" "type = char"
+}
+
+proc test_string_literal_types_accepted {} {
+    global gdb_prompt
+
+    # Test various character values.
+
+    gdb_test "pt 'a simple string'" "type = string"
+}
+
+proc test_logical_literal_types_accepted {} {
+    global gdb_prompt
+
+    # Test the only possible values for a logical, TRUE and FALSE.
+
+    gdb_test "pt TRUE" "type = bool"
+    gdb_test "pt FALSE" "type = bool"
+}
+
+proc test_float_literal_types_accepted {} {
+    global gdb_prompt
+
+    # Test various floating point formats
+
+    # this used to guess whether to look for "real*4" or
+    # "real*8" based on a target config variable, but noone
+    # maintained it properly.
+
+    gdb_test "pt .44" "type = double"
+    gdb_test "pt 44.0" "type = double"
+    gdb_test "pt 10e20" "type = double"
+    gdb_test "pt 10E20" "type = double"
+}
+
+# Start with a fresh gdb.
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+
+if [set_lang_pascal] then {
+    test_integer_literal_types_accepted
+    test_logical_literal_types_accepted
+    test_character_literal_types_accepted
+    test_string_literal_types_accepted
+    test_float_literal_types_accepted
+} else {
+    warning "$test_name tests suppressed." 0
+}
Index: lib/pascal.exp
===================================================================
RCS file: lib/pascal.exp
diff -N lib/pascal.exp
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ lib/pascal.exp	18 Jul 2007 08:53:33 -0000
@@ -0,0 +1,154 @@
+# Copyright 2007 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# 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
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+# USA.  
+
+load_lib libgloss.exp
+
+set pascal_init_done 0
+
+# This procedure looks for a suitable pascal compiler
+# For now only GNU pascal compiler and Free Pascal compiler
+# are searched.
+# First, environment variable GPC is checked
+# if present, GPC compiler is assumed to be the value of
+# that environment variable.
+# Second, environment variable FPC is checked
+# if present, Free Pascal compiler is assumed to be the value of
+# that environment variable.
+# Third, gpc executable is searched using `which gpc`  
+# Lastly, fpc executable is searched using `which fpc` 
+# Using environment variable allows to force
+# which compiler is used in testsuite
+ 
+proc pascal_init {} {
+    global pascal_init_done
+    global pascal_compiler_is_gpc
+    global pascal_compiler_is_fpc
+    global gpc_compiler
+    global fpc_compiler
+    global env
+ 
+    if { $pascal_init_done == 1 } {
+	return
+    }
+
+    set pascal_compiler_is_gpc 0
+    set pascal_compiler_is_fpc 0
+    set gpc_compiler [transform gpc]
+    set fpc_compiler [transform fpc]
+
+    if ![is_remote host] {
+	if { [info exists env(GPC)] } {
+	    set pascal_compiler_is_gpc 1
+	    set gpc_compiler $env(GPC)
+	    verbose -log "Assuming GNU Pascal ($gpc_compiler)"
+	} elseif { [info exists env(FPC)] } {
+	    set pascal_compiler_is_fpc 1
+	    set fpc_compiler $env(FPC)
+	    verbose -log "Assuming Free Pascal ($fpc_compiler)"
+	} elseif { [which $gpc_compiler] != 0 } {
+	    set pascal_compiler_is_gpc 1
+	    verbose -log "GNU Pascal compiler found"
+        } elseif { [which $fpc_compiler] != 0 } {
+	    set pascal_compiler_is_fpc 1
+	    verbose -log "Free Pascal compiler found"
+	}
+    }
+    set pascal_init_done 1
+}   
+
+proc gpc_compile {source dest type options} {
+    global gpc_compiler
+    set add_flags ""
+    if {$type == "object"} {
+	append add_flags " -c"
+    }
+
+    if { $type == "preprocess" } {
+	append add_flags " -E"
+    }
+    
+    if { $type == "assembly" } {
+	append add_flags " -S"
+    }
+
+    foreach i $options {
+	if { $i == "debug" } {
+	    if [board_info $dest exists debug_flags] {
+		append add_flags " [board_info $dest debug_flags]";
+	    } else {
+		append add_flags " -g"
+	    }
+	}
+    }
+
+    set result [remote_exec host $gpc_compiler "-o $dest --automake
$add_flags $source"]
+    return $result
+}
+
+proc fpc_compile {source dest type options} {
+    global fpc_compiler
+    set add_flags ""
+    if {$type == "object"} {
+	append add_flags " -Cn"
+    }
+
+    if { $type == "preprocess" } {
+	return "Free Pascal can not preprocess"
+    }
+    
+    if { $type == "assembly" } {
+	append add_flags " -al"
+    }
+
+    foreach i $options {
+	if { $i == "debug" } {
+	    if [board_info $dest exists debug_flags] {
+		append add_flags " [board_info $dest debug_flags]";
+	    } else {
+		append add_flags " -g"
+	    }
+	}
+    }
+
+    set result [remote_exec host $fpc_compiler "-o$dest $add_flags
$source"]
+    return $result
+}
+
+proc gdb_compile_pascal {source dest type options} {
+    global pascal_init_done
+    global pascal_compiler_is_gpc
+    global pascal_compiler_is_fpc
+
+    if { $pascal_init_done == 0 } { 
+	pascal_init
+    }
+
+    if { $pascal_compiler_is_fpc == 1 } {
+        set result [fpc_compile $source $dest $type $options]
+    } elseif { $pascal_compiler_is_gpc == 1 } {
+        set result [gpc_compile $source $dest $type $options]
+    } else {
+	unsupported "No pascal compiler found"
+	return "No pascal compiler. Compilation failed."
+    }
+
+    if ![file exists $dest] {
+        unsupported "Pascal compilation failed: $result"
+        return "Pascal compilation failed."
+    }
+}
+