* linespec.c (minsym_found): Advance to the next line if possible.

* gdb.base/prologue.c, gdb.base/prologue.exp: New.
	* lib/gdb.exp (gdb_breakpoint): Handle "temporary".

gdb/ChangeLog

@@ -1,3 +1,7 @@
+2007-07-31  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* linespec.c (minsym_found): Advance to the next line if possible.
+
 2007-07-31  Pedro Alves  <pedro_alves@portugalmail.pt>
 
 	* arm-wince-tdep.c (arm_wince_init_abi): Remove svr4 related call.

gdb/linespec.c

@@ -1833,11 +1833,27 @@ minsym_found (int funfirstline, struct minimal_symbol *msymbol)
   values.sals[0].section = SYMBOL_BFD_SECTION (msymbol);
   if (funfirstline)
     {
+      struct symtab_and_line sal;
+
       values.sals[0].pc
 	+= gdbarch_deprecated_function_start_offset (current_gdbarch);
       values.sals[0].pc = gdbarch_skip_prologue
 			    (current_gdbarch, values.sals[0].pc);
+
+      sal = find_pc_sect_line (values.sals[0].pc, values.sals[0].section, 0);
+
+      /* Check if SKIP_PROLOGUE left us in mid-line, and the next
+	 line is still part of the same function.  If there is no
+	 line information here, sal.pc will be the passed in PC.  */
+      if (sal.pc != values.sals[0].pc
+	  && (lookup_minimal_symbol_by_pc_section (values.sals[0].pc,
+						   values.sals[0].section)
+	      == lookup_minimal_symbol_by_pc_section (sal.end,
+						      values.sals[0].section)))
+	/* Recalculate the line number (might not be N+1).  */
+	values.sals[0] = find_pc_sect_line (sal.end, values.sals[0].section, 0);
     }
+
   values.nelts = 1;
   return values;
 }

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2007-07-31  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* gdb.base/prologue.c, gdb.base/prologue.exp: New.
+	* lib/gdb.exp (gdb_breakpoint): Handle "temporary".
+
 2007-07-30  Maciej W. Rozycki  <macro@mips.com>
 
 	* gdb.base/dump.exp: Force the correct endianness for binary

gdb/testsuite/gdb.base/prologue.c

@@ -0,0 +1,39 @@
+/* This test is part of GDB, the GNU debugger.
+
+   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.
+   */
+
+int leaf (void)
+{
+  return 1;
+}
+
+int marker (int val)
+{
+  leaf ();
+  return leaf () * val;
+}
+
+int other (int val) __attribute__((alias("marker")));
+
+int main(void)
+{
+  marker (0);
+  marker (0);
+
+  return 0;
+}

gdb/testsuite/gdb.base/prologue.exp

@@ -0,0 +1,68 @@
+# Test for prologue skipping in minimal symbols with line info.
+# 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 { [skip_cplus_tests] } { continue }
+
+set testfile "prologue"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
+     untested prologue.exp
+     return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+if ![runto_main] then {
+    perror "couldn't run to breakpoint"
+    continue
+}
+
+proc find_breakpoint_pc { sym } {
+    global decimal hex gdb_prompt
+
+    if { [gdb_breakpoint $sym temporary] } {
+	pass "setting breakpoint at $sym"
+    }
+
+    gdb_test "continue" "marker \\(.*\\) at.*" "continue to $sym"
+
+    set pc 0
+    set msg "reading \$pc: $sym"
+    gdb_test_multiple "print/x \$pc" $msg {
+	-re "\\\$$decimal = ($hex)\r\n$gdb_prompt $" {
+	    set pc $expect_out(1,string)
+	    pass $msg
+	}
+    }
+
+    return $pc
+}
+
+# GDB would skip the prologue differently when given a symbol with
+# debug info than when given a minimal symbol from the symbol table.
+# Make sure this is fixed.
+
+set pc1 [find_breakpoint_pc "marker"]
+
+set pc2 [find_breakpoint_pc "other"]
+
+gdb_test "print $pc1 == $pc2" "\\\$$decimal = 1" "same pc from minimal symbol"

gdb/testsuite/lib/gdb.exp

@@ -324,7 +324,7 @@ proc gdb_start_cmd {args} {
 }
 
 # Set a breakpoint at FUNCTION.  If there is an additional argument it is
-# a list of options; the only currently supported option is allow-pending.
+# a list of options; the supported options are allow-pending and temporary.
 
 proc gdb_breakpoint { function args } {
     global gdb_prompt
@@ -335,7 +335,12 @@ proc gdb_breakpoint { function args } {
 	set pending_response y
     }
 
-    send_gdb "break $function\n"
+    set break_command "break"
+    if {[lsearch -exact [lindex $args 0] temporary] != -1} {
+	set break_command "tbreak"
+    }
+
+    send_gdb "$break_command $function\n"
     # The first two regexps are what we get with -g, the third is without -g.
     gdb_expect 30 {
 	-re "Breakpoint \[0-9\]* at .*: file .*, line $decimal.\r\n$gdb_prompt $" {}