non-permanent breakpoints.
(bpstat_stop_status): Change enable_state to bp_disabled only for
non-permanent breakpoints.
(bp_loc_is_permanent): New function.
(create_breakpoint): Check if the location points to a permanent
breakpoint and if it does, make breakpoint permanent.
(update_breakpoint_locations): Make sure new locations of permanent
breakpoints are properly initialized.
* i386-tdep.c (i386_skip_permanent_breakpoint): New function.
(i386_gdbarch_init): Set gdbarch_skip_permanent_breakpoint.
* gdb.arch/i386-bp_permanent.exp: New test.
+2008-09-03 Aleksandar Ristovski <aristovski@qnx.com>
+
+ * breakpoint.c (breakpoint_init_inferior): Mark as not inserted only
+ non-permanent breakpoints.
+ (bpstat_stop_status): Change enable_state to bp_disabled only for
+ non-permanent breakpoints.
+ (bp_loc_is_permanent): New function.
+ (create_breakpoint): Check if the location points to a permanent
+ breakpoint and if it does, make breakpoint permanent.
+ (update_breakpoint_locations): Make sure new locations of permanent
+ breakpoints are properly initialized.
+ * i386-tdep.c (i386_skip_permanent_breakpoint): New function.
+ (i386_gdbarch_init): Set gdbarch_skip_permanent_breakpoint.
+
2008-09-02 Pedro Alves <pedro@codesourcery.com>
* breakpoint.c (insert_breakpoints, update_global_location_list):
struct bp_location *bpt;
ALL_BP_LOCATIONS (bpt)
- bpt->inserted = 0;
+ if (bpt->owner->enable_state != bp_permanent)
+ bpt->inserted = 0;
ALL_BREAKPOINTS_SAFE (b, temp)
{
/* We will stop here */
if (b->disposition == disp_disable)
{
- b->enable_state = bp_disabled;
+ if (b->enable_state != bp_permanent)
+ b->enable_state = bp_disabled;
update_global_location_list (0);
}
if (b->silent)
set_breakpoint_location_function (loc);
return loc;
}
+\f
+
+/* Return 1 if LOC is pointing to a permanent breakpoint,
+ return 0 otherwise. */
+
+static int
+bp_loc_is_permanent (struct bp_location *loc)
+{
+ int len;
+ CORE_ADDR addr;
+ const gdb_byte *brk;
+ gdb_byte *target_mem;
+
+ gdb_assert (loc != NULL);
+
+ addr = loc->address;
+ brk = gdbarch_breakpoint_from_pc (current_gdbarch, &addr, &len);
+
+ target_mem = alloca (len);
+
+ if (target_read_memory (loc->address, target_mem, len) == 0
+ && memcmp (target_mem, brk, len) == 0)
+ return 1;
+
+ return 0;
+}
+
+
/* Create a breakpoint with SAL as location. Use ADDR_STRING
as textual description of the location, and COND_STRING
loc = add_location_to_breakpoint (b, type, &sal);
}
+ if (bp_loc_is_permanent (loc))
+ make_breakpoint_permanent (b);
+
if (b->cond_string)
{
char *arg = b->cond_string;
b->line_number = sals.sals[i].line;
}
+ /* Update locations of permanent breakpoints. */
+ if (b->enable_state == bp_permanent)
+ make_breakpoint_permanent (b);
+
/* If possible, carry over 'disable' status from existing breakpoints. */
{
struct bp_location *e = existing_locations;
return read_memory_unsigned_integer (sp + (4 * (argi + 1)), 4);
}
+static void
+i386_skip_permanent_breakpoint (struct regcache *regcache)
+{
+ CORE_ADDR current_pc = regcache_read_pc (regcache);
+
+ /* On i386, breakpoint is exactly 1 byte long, so we just
+ adjust the PC in the regcache. */
+ current_pc += 1;
+ regcache_write_pc (regcache, current_pc);
+}
+
+
\f
static struct gdbarch *
i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
if (tdep->mm0_regnum == 0)
tdep->mm0_regnum = gdbarch_num_regs (gdbarch);
+ set_gdbarch_skip_permanent_breakpoint (gdbarch,
+ i386_skip_permanent_breakpoint);
+
return gdbarch;
}
+2008-09-03 Aleksandar Ristovski <aristovski@qnx.com>
+
+ * gdb.arch/i386-bp_permanent.exp: New test.
+
2008-08-24 Tom Tromey <tromey@redhat.com>
* gdb.base/maint.exp: Update "maint print type".
--- /dev/null
+# Copyright (C) 2008 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 3 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, see <http://www.gnu.org/licenses/>.
+
+
+# This file is part of the gdb testsuite.
+
+if $tracelevel {
+ strace $tracelevel
+}
+
+# Test stepping over permanent breakpoints on i386.
+
+if ![istarget "i?86-*-*"] then {
+ verbose "Skipping skip over permanent breakpoint on i386 tests."
+ return
+}
+
+set testfile "i386-prologue"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+# some targets have leading underscores on assembly symbols.
+# TODO: detect this automatically
+set additional_flags ""
+if [istarget "i?86-*-cygwin*"] then {
+ set additional_flags "additional_flags=-DSYMBOL_PREFIX=\"_\""
+}
+
+# Don't use "debug", so that we don't have line information for the assembly
+# fragments.
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list $additional_flags]] != "" } {
+ untested i386-prologue.exp
+ return -1
+}
+
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+#
+# Run to `main' where we begin our tests.
+#
+
+if ![runto_main] then {
+ return -1
+}
+
+set function standard
+
+set retcode [gdb_test_multiple "disassemble $function" "Disassemble function '$function'" {
+ -re ".*($hex) <$function\\+0>.*($hex) <$function\\+4>.*($hex) <$function\\+5>.*($hex) <$function\\+6>.*$gdb_prompt $" {
+ set function_start $expect_out(1,string);
+ set address $expect_out(2,string);
+ set address1 $expect_out(3,string);
+ set address2 $expect_out(4,string);
+ }
+}]
+
+if {$retcode != 0} {
+ fail "Disassemble failed, skipping entire test."
+ return -1
+}
+
+gdb_breakpoint "*$function_start"
+
+gdb_breakpoint "*$address"
+
+gdb_test "continue" "Breakpoint .*, $function_start in $function.*" \
+ "Stop at the '$function' start breakpoint (fetching esp)."
+
+# We want to fetch esp at the start of '$function' function to make sure
+# skip_permanent_breakpoint implementation really skips only the perm.
+# breakpoint. If, for whatever reason, 'leave' instruction doesn't get
+# executed, esp will not have this value.
+set start_esp 0
+gdb_test_multiple "print \$esp" "Fetch esp value." {
+ -re "\\\$1.*($hex).*$gdb_prompt $" {
+ set start_esp $expect_out(1,string);
+ }
+}
+
+gdb_test "continue" "Breakpoint .*, $address in $function.*" \
+ "Stop at permanent breakpoint."
+
+gdb_test "stepi" "$address1|$address2 in $function.*" \
+ "Single stepping past permanent breakpoint."
+
+gdb_test "print \$esp" ".*$start_esp.*" \
+ "ESP value does not match - step_permanent_breakpoint wrong."
+
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