2004-08-08 Michael Chastain <mec.gnu@mindspring.com>

* lib/gdb.exp (gdb_get_line_number): Rewrite with native tcl
	rather than asking gdb to search.

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2004-08-08  Michael Chastain  <mec.gnu@mindspring.com>
+
+	* lib/gdb.exp (gdb_get_line_number): Rewrite with native tcl
+	rather than asking gdb to search.
+
 2004-08-05  Michael Chastain  <mec.gnu@mindspring.com>
 
 	* gdb.base/gcore.c: Include <string.h>.

gdb/testsuite/lib/gdb.exp

@@ -1793,66 +1793,107 @@ proc gdb_step_for_stub { } {
     }
 }
 
-### gdb_get_line_number TEXT [FILE]
-###
-### Search the source file FILE, and return the line number of a line
-### containing TEXT.  Use this function instead of hard-coding line
-### numbers into your test script.
-###
-### Specifically, this function uses GDB's "search" command to search
-### FILE for the first line containing TEXT, and returns its line
-### number.  Thus, FILE must be a source file, compiled into the
-### executable you are running.  If omitted, FILE defaults to the
-### value of the global variable `srcfile'; most test scripts set
-### `srcfile' appropriately at the top anyway.
-###
-### Use this function to keep your test scripts independent of the
-### exact line numbering of the source file.  Don't write:
-### 
-###   send_gdb "break 20"
-### 
-### This means that if anyone ever edits your test's source file, 
-### your test could break.  Instead, put a comment like this on the
-### source file line you want to break at:
-### 
-###   /* breakpoint spot: frotz.exp: test name */
-### 
-### and then write, in your test script (which we assume is named
-### frotz.exp):
-### 
-###   send_gdb "break [gdb_get_line_number "frotz.exp: test name"]\n"
-###
-### (Yes, Tcl knows how to handle the nested quotes and brackets.
-### Try this:
-### 	$ tclsh
-### 	% puts "foo [lindex "bar baz" 1]"
-### 	foo baz
-### 	% 
-### Tcl is quite clever, for a little stringy language.)
+# gdb_get_line_number TEXT [FILE]
+#
+# Search the source file FILE, and return the line number of the
+# first line containing TEXT.  If no match is found, return -1.
+# 
+# TEXT is a string literal, not a regular expression.
+#
+# The default value of FILE is "$srcdir/$subdir/$srcfile".  If FILE is
+# specified, and does not start with "/", then it is assumed to be in
+# "$srcdir/$subdir".  This is awkward, and can be fixed in the future,
+# by changing the callers and the interface at the same time.
+# In particular: gdb.base/break.exp, gdb.base/condbreak.exp,
+# gdb.base/ena-dis-br.exp.
+#
+# Use this function to keep your test scripts independent of the
+# exact line numbering of the source file.  Don't write:
+# 
+#   send_gdb "break 20"
+# 
+# This means that if anyone ever edits your test's source file, 
+# your test could break.  Instead, put a comment like this on the
+# source file line you want to break at:
+# 
+#   /* breakpoint spot: frotz.exp: test name */
+# 
+# and then write, in your test script (which we assume is named
+# frotz.exp):
+# 
+#   send_gdb "break [gdb_get_line_number "frotz.exp: test name"]\n"
+#
+# (Yes, Tcl knows how to handle the nested quotes and brackets.
+# Try this:
+# 	$ tclsh
+# 	% puts "foo [lindex "bar baz" 1]"
+# 	foo baz
+# 	% 
+# Tcl is quite clever, for a little stringy language.)
+#
+# ===
+#
+# The previous implementation of this procedure used the gdb search command.
+# This version is different:
+#
+#   . It works with MI, and it also works when gdb is not running.
+#
+#   . It operates on the build machine, not the host machine.
+#
+#   . For now, this implementation fakes a current directory of
+#     $srcdir/$subdir to be compatible with the old implementation.
+#     This will go away eventually and some callers will need to
+#     be changed.
+#
+#   . The TEXT argument is literal text and matches literally,
+#     not a regular expression as it was before.
+#
+#   . State changes in gdb, such as changing the current file
+#     and setting $_, no longer happen.
+#
+# After a bit of time we can forget about the differences from the
+# old implementation.
+#
+# --chastain 2004-08-05
 
-proc gdb_get_line_number {text {file /omitted/}} {
-    global gdb_prompt;
-    global srcfile;
+proc gdb_get_line_number { text { file "" } } {
+    global srcdir
+    global subdir
+    global srcfile
 
-    if {! [string compare $file /omitted/]} {
-	set file $srcfile
+    if { "$file" == "" } then {
+	set file "$srcfile"
+    }
+    if { ! [regexp "^/" "$file"] } then {
+	set file "$srcdir/$subdir/$file"
     }
 
-    set result -1;
-    gdb_test "list ${file}:1,1" ".*" ""
-    send_gdb "search ${text}\n"
-    gdb_expect {
-        -re "\[\r\n\]+(\[0-9\]+)\[ \t\].*${text}.*$gdb_prompt $" {
-            set result $expect_out(1,string)
-        }
-        -re ".*$gdb_prompt $" {
-            fail "find line number containing \"${text}\""
-        }
-        timeout {
-            fail "find line number containing \"${text}\" (timeout)"
-        }
+    if { [ catch { set fd [open "$file"] } message ] } then {
+	perror "$message"
+	return -1
     }
-    return $result;
+
+    set found -1
+    for { set line 1 } { 1 } { incr line } {
+	if { [ catch { set nchar [gets "$fd" body] } message ] } then {
+	    perror "$message"
+	    return -1
+	}
+	if { $nchar < 0 } then {
+	    break
+	}
+	if { [string first "$text" "$body"] >= 0 } then {
+	    set found $line
+	    break
+	}
+    }
+
+    if { [ catch { close "$fd" } message ] } then {
+	perror "$message"
+	return -1
+    }
+
+    return $found
 }
 
 # gdb_continue_to_end: