old-cross-binutils/gdb/testsuite/gdb.base/hbreak2.exp
Pedro Alves 5d5658a1d3 Per-inferior/Inferior-qualified thread IDs
This commit changes GDB to track thread numbers per-inferior.  Then,
if you're debugging multiple inferiors, GDB displays
"inferior-num.thread-num" instead of just "thread-num" whenever it
needs to display a thread:

 (gdb) info inferiors
   Num  Description       Executable
   1    process 6022     /home/pedro/gdb/tests/threads
 * 2    process 6037     /home/pedro/gdb/tests/threads
 (gdb) info threads
   Id   Target Id         Frame
   1.1  Thread 0x7ffff7fc2740 (LWP 6022) "threads" (running)
   1.2  Thread 0x7ffff77c0700 (LWP 6028) "threads" (running)
   1.3  Thread 0x7ffff7fc2740 (LWP 6032) "threads" (running)
   2.1  Thread 0x7ffff7fc1700 (LWP 6037) "threads" (running)
   2.2  Thread 0x7ffff77c0700 (LWP 6038) "threads" (running)
 * 2.3  Thread 0x7ffff7fc2740 (LWP 6039) "threads" (running)
 (gdb)
...
 (gdb) thread 1.1
 [Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
 (gdb)
...

etc.

You can still use "thread NUM", in which case GDB infers you're
referring to thread NUM of the current inferior.

The $_thread convenience var and Python's InferiorThread.num attribute
are remapped to the new per-inferior thread number.  It's a backward
compatibility break, but since it only matters when debugging multiple
inferiors, I think it's worth doing.

Because MI thread IDs need to be a single integer, we keep giving
threads a global identifier, _in addition_ to the per-inferior number,
and make MI always refer to the global thread IDs.  IOW, nothing
changes from a MI frontend's perspective.

Similarly, since Python's Breakpoint.thread and Guile's
breakpoint-thread/set-breakpoint-thread breakpoint methods need to
work with integers, those are adjusted to work with global thread IDs
too.  Follow up patches will provide convenient means to access
threads' global IDs.

To avoid potencially confusing users (which also avoids updating much
of the testsuite), if there's only one inferior and its ID is "1",
IOW, the user hasn't done anything multi-process/inferior related,
then the "INF." part of thread IDs is not shown.  E.g,.:

 (gdb) info inferiors
   Num  Description       Executable
 * 1    process 15275     /home/pedro/gdb/tests/threads
 (gdb) info threads
   Id   Target Id         Frame
 * 1    Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40
 (gdb) add-inferior
 Added inferior 2
 (gdb) info threads
   Id   Target Id         Frame
 * 1.1  Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40
 (gdb)

No regressions on x86_64 Fedora 20.

gdb/ChangeLog:
2016-01-13  Pedro Alves  <palves@redhat.com>

	* NEWS: Mention that thread IDs are now per inferior and global
	thread IDs.
	* Makefile.in (SFILES): Add tid-parse.c.
	(COMMON_OBS): Add tid-parse.o.
	(HFILES_NO_SRCDIR): Add tid-parse.h.
	* ada-tasks.c: Adjust to use ptid_to_global_thread_id.
	* breakpoint.c (insert_breakpoint_locations)
	(remove_threaded_breakpoints, bpstat_check_breakpoint_conditions)
	(print_one_breakpoint_location, set_longjmp_breakpoint)
	(check_longjmp_breakpoint_for_call_dummy)
	(set_momentary_breakpoint): Adjust to use global IDs.
	(find_condition_and_thread, watch_command_1): Use parse_thread_id.
	(until_break_command, longjmp_bkpt_dtor)
	(breakpoint_re_set_thread, insert_single_step_breakpoint): Adjust
	to use global IDs.
	* dummy-frame.c (pop_dummy_frame_bpt): Adjust to use
	ptid_to_global_thread_id.
	* elfread.c (elf_gnu_ifunc_resolver_stop): Likewise.
	* gdbthread.h (struct thread_info): Rename field 'num' to
	'global_num.  Add new fields 'per_inf_num' and 'inf'.
	(thread_id_to_pid): Rename thread_id_to_pid to
	global_thread_id_to_ptid.
	(pid_to_thread_id): Rename to ...
	(ptid_to_global_thread_id): ... this.
	(valid_thread_id): Rename to ...
	(valid_global_thread_id): ... this.
	(find_thread_id): Rename to ...
	(find_thread_global_id): ... this.
	(ALL_THREADS, ALL_THREADS_BY_INFERIOR): Declare.
	(print_thread_info): Add comment.
	* tid-parse.h: New file.
	* tid-parse.c: New file.
	* infcmd.c (step_command_fsm_prepare)
	(step_command_fsm_should_stop): Adjust to use the global thread
	ID.
	(until_next_command, until_next_command)
	(finish_command_fsm_should_stop): Adjust to use the global thread
	ID.
	(attach_post_wait): Adjust to check the inferior number too.
	* inferior.h (struct inferior) <highest_thread_num>: New field.
	* infrun.c (handle_signal_stop)
	(insert_exception_resume_breakpoint)
	(insert_exception_resume_from_probe): Adjust to use the global
	thread ID.
	* record-btrace.c (record_btrace_open): Use global thread IDs.
	* remote.c (process_initial_stop_replies): Also consider the
	inferior number.
	* target.c (target_pre_inferior): Clear the inferior's highest
	thread num.
	* thread.c (clear_thread_inferior_resources): Adjust to use the
	global thread ID.
	(new_thread): New inferior parameter.  Adjust to use it.  Set both
	the thread's global ID and the thread's per-inferior ID.
	(add_thread_silent): Adjust.
	(find_thread_global_id): New.
	(find_thread_id): Make static.  Adjust to rename.
	(valid_thread_id): Rename to ...
	(valid_global_thread_id): ... this.
	(pid_to_thread_id): Rename to ...
	(ptid_to_global_thread_id): ... this.
	(thread_id_to_pid): Rename to ...
	(global_thread_id_to_ptid): ... this.  Adjust.
	(first_thread_of_process): Adjust.
	(do_captured_list_thread_ids): Adjust to use global thread IDs.
	(should_print_thread): New function.
	(print_thread_info): Rename to ...
	(print_thread_info_1): ... this, and add new show_global_ids
	parameter.  Handle it.  Iterate over inferiors.
	(print_thread_info): Reimplement as wrapper around
	print_thread_info_1.
	(show_inferior_qualified_tids): New function.
	(print_thread_id): Use it.
	(tp_array_compar): Compare inferior numbers too.
	(thread_apply_command): Use tid_range_parser.
	(do_captured_thread_select): Use parse_thread_id.
	(thread_id_make_value): Adjust.
	(_initialize_thread): Adjust "info threads" help string.
	* varobj.c (struct varobj_root): Update comment.
	(varobj_create): Adjust to use global thread IDs.
	(value_of_root_1): Adjust to use global_thread_id_to_ptid.
	* windows-tdep.c (display_tib): No longer accept an argument.
	* cli/cli-utils.c (get_number_trailer): Make extern.
	* cli/cli-utils.h (get_number_trailer): Declare.
	(get_number_const): Adjust documentation.
	* mi/mi-cmd-var.c (mi_cmd_var_update_iter): Adjust to use global
	thread IDs.
	* mi/mi-interp.c (mi_new_thread, mi_thread_exit)
	(mi_on_normal_stop, mi_output_running_pid, mi_on_resume):
	* mi/mi-main.c (mi_execute_command, mi_cmd_execute): Likewise.
	* guile/scm-breakpoint.c (gdbscm_set_breakpoint_thread_x):
	Likewise.
	* python/py-breakpoint.c (bppy_set_thread): Likewise.
	* python/py-finishbreakpoint.c (bpfinishpy_init): Likewise.
	* python/py-infthread.c (thpy_get_num): Add comment and return the
	per-inferior thread ID.
	(thread_object_getset): Update comment of "num".

gdb/testsuite/ChangeLog:
2016-01-07  Pedro Alves  <palves@redhat.com>

	* gdb.base/break.exp: Adjust to output changes.
	* gdb.base/hbreak2.exp: Likewise.
	* gdb.base/sepdebug.exp: Likewise.
	* gdb.base/watch_thread_num.exp: Likewise.
	* gdb.linespec/keywords.exp: Likewise.
	* gdb.multi/info-threads.exp: Likewise.
	* gdb.threads/thread-find.exp: Likewise.
	* gdb.multi/tids.c: New file.
	* gdb.multi/tids.exp: New file.

gdb/doc/ChangeLog:
2016-01-07  Pedro Alves  <palves@redhat.com>

	* gdb.texinfo (Threads): Document per-inferior thread IDs,
	qualified thread IDs, global thread IDs and thread ID lists.
	(Set Watchpoints, Thread-Specific Breakpoints): Adjust to refer to
	thread IDs.
	(Convenience Vars): Document the $_thread convenience variable.
	(Ada Tasks): Adjust to refer to thread IDs.
	(GDB/MI Async Records, GDB/MI Thread Commands, GDB/MI Ada Tasking
	Commands, GDB/MI Variable Objects): Update to mention global
	thread IDs.
	* guile.texi (Breakpoints In Guile)
	<breakpoint-thread/set-breakpoint-thread breakpoint>: Mention
	global thread IDs instead of thread IDs.
	* python.texi (Threads In Python): Adjust documentation of
	InferiorThread.num.
	(Breakpoint.thread): Mention global thread IDs instead of thread
	IDs.
2016-01-13 10:59:43 +00:00

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# Copyright 1988-2016 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/>.
# Based on break.exp by Rob Savoye. (rob@cygnus.com)
# Hardware breakpoint support by Maciej W. Rozycki and Daniel Jacobowitz.
# Only one hardware breakpoint is set at a time as targets may limit
# the number available.
if { [prepare_for_testing hbreak2.exp "hbreak2" {break.c break1.c} {debug nowarnings}] } {
return -1
}
set srcfile break.c
set srcfile1 break1.c
if ![runto_main] then { fail "break tests suppressed" }
delete_breakpoints
#
# Test whether the target supports hardware breakpoints at all.
#
gdb_test_multiple "hbreak main" "hardware breakpoint support" {
-re "No hardware breakpoint support in the target.*$gdb_prompt $" {
unsupported "hardware breakpoints"
return
}
-re "Hardware breakpoints used exceeds limit.*$gdb_prompt $" {
unsupported "hardware breakpoints"
return
}
-re "Hardware assisted breakpoint.*at.* file .*$srcfile, line.*$gdb_prompt $" {
pass "hardware breakpoint support"
}
}
gdb_run_cmd
gdb_test_multiple "" "hardware breakpoint insertion" {
-re "Warning:\[\r\n\]+Cannot insert hardware breakpoint \[0-9\]+\.\[\r\n\]+Could not insert hardware breakpoints:\[\r\n\]+You may have requested too many hardware breakpoints/watchpoints\.\[\r\n\]+.*$gdb_prompt $" {
unsupported "hardware breakpoint insertion"
return
}
-re "Breakpoint \[0-9\]+,.*main .*argc.*argv.* at .*$srcfile:.*\[\r\n\]+.*\[\t \]+if .argc.* \{.*$gdb_prompt $" {
pass "hardware breakpoint insertion"
}
}
delete_breakpoints
#
# Test simple hardware breakpoint setting commands.
#
#
# Test break at function.
#
gdb_test "hbreak main" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line.*" \
"hardware breakpoint function"
delete_breakpoints
#
# Test break at quoted function.
#
gdb_test "hbreak \"marker2\"" \
"Hardware assisted breakpoint.*at.* file .*$srcfile1, line.*" \
"hardware breakpoint quoted function"
delete_breakpoints
#
# Test break at function in file.
#
gdb_test "hbreak $srcfile:factorial" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line.*" \
"hardware breakpoint function in file"
delete_breakpoints
set bp_location1 [gdb_get_line_number "set breakpoint 1 here"]
#
# Test break at line number.
#
# Note that the default source file is the last one whose source text
# was printed. For native debugging, before we've executed the
# program, this is the file containing main, but for remote debugging,
# it's wherever the processor was stopped when we connected to the
# board. So, to be sure, we do a list command.
#
gdb_test "list main" \
".*main \\(int argc, char ..argv, char ..envp\\).*" \
"use `list' to establish default source file"
gdb_test "hbreak $bp_location1" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location1\\." \
"hardware breakpoint line number"
delete_breakpoints
set bp_location2 [gdb_get_line_number "set breakpoint 2 here"]
#
# Test break at line number in file.
#
gdb_test "hbreak $srcfile:$bp_location2" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location2\\." \
"hardware breakpoint line number in file"
delete_breakpoints
set bp_location3 [gdb_get_line_number "set breakpoint 3 here"]
set bp_location4 [gdb_get_line_number "set breakpoint 4 here"]
#
# Test putting a break at the start of a multi-line if conditional.
# Verify the breakpoint was put at the start of the conditional.
#
gdb_test "hbreak multi_line_if_conditional" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location3\\." \
"hardware breakpoint at start of multi line if conditional"
delete_breakpoints
gdb_test "hbreak multi_line_while_conditional" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location4\\." \
"hardware breakpoint at start of multi line while conditional"
set bp_location6 [gdb_get_line_number "set breakpoint 6 here"]
set main_line $bp_location6
set bp_location7 [gdb_get_line_number "set breakpoint 7 here"]
set bp_location8 [gdb_get_line_number "set breakpoint 8 here" $srcfile1]
gdb_test "info break" \
"Num Type\[ \]+Disp Enb Address\[ \]+What.*
\[0-9\]+\[\t \]+hw breakpoint keep y.* in multi_line_while_conditional at .*$srcfile:$bp_location4" \
"hardware breakpoint info"
delete_breakpoints
#
# Run until the breakpoint at main is hit. For non-stubs-using targets.
#
gdb_test "hbreak main" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line.*" \
"hardware breakpoint function (2)"
gdb_run_cmd
gdb_test "" \
"Breakpoint \[0-9\]+,.*main .*argc.*argv.* at .*$srcfile:$bp_location6.*$bp_location6\[\t \]+if .argc.* \{.*" \
"run until function breakpoint"
delete_breakpoints
#
# Run until the breakpoint at a line number.
#
gdb_test "hbreak $bp_location1" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location1\\." \
"hardware breakpoint line number (2)"
gdb_test "continue" \
"Continuing\\..*Breakpoint \[0-9\]+, main \\(argc=.*, argv=.*, envp=.*\\) at .*$srcfile:$bp_location1.*$bp_location1\[\t \]+printf.*factorial.*" \
"run until breakpoint set at a line number"
delete_breakpoints
#
# Run until the breakpoint set in a function in a file.
#
gdb_test "hbreak $srcfile:factorial" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line.*" \
"hardware breakpoint function in file (2)"
for {set i 6} {$i >= 1} {incr i -1} {
gdb_test "continue" \
"Continuing\\..*Breakpoint \[0-9\]+, factorial \\(value=$i\\) at .*$srcfile:$bp_location7.*$bp_location7\[\t \]+.*if .value > 1. \{.*" \
"run until file:function($i) breakpoint"
}
delete_breakpoints
#
# Run until the breakpoint set at a quoted function.
#
gdb_test "hbreak \"marker2\"" \
"Hardware assisted breakpoint.*at.* file .*$srcfile1, line.*" \
"hardware breakpoint quoted function (2)"
gdb_test "continue" \
"Continuing\\..*Breakpoint \[0-9\]+, (0x\[0-9a-f\]+ in )?marker2 \\(a=43\\) at .*$srcfile1:$bp_location8.*" \
"run until quoted breakpoint"
delete_breakpoints
#
# Run until the file:function breakpoint at a line number in a file.
#
gdb_test "hbreak $srcfile:$bp_location2" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location2\\." \
"hardware breakpoint line number in file (2)"
gdb_test "continue" \
"Continuing\\..*Breakpoint \[0-9\]+, main \\(argc=.*, argv=.*, envp=.*\\) at .*$srcfile:$bp_location2.*$bp_location2\[\t \]+argc = \\(argc == 12345\\);.*" \
"run until file:linenum breakpoint"
delete_breakpoints
# Test break at offset +1.
set bp_location10 [gdb_get_line_number "set breakpoint 10 here"]
gdb_test "hbreak +1" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location10\\." \
"hardware breakpoint offset +1"
# Check to see if breakpoint is hit when stepped onto.
gdb_test "step" \
".*Breakpoint \[0-9\]+, main \\(argc=.*, argv=.*, envp=.*\\) at .*$srcfile:$bp_location10.*$bp_location10\[\t \]+return argc;.*breakpoint 10 here.*" \
"step onto hardware breakpoint"
delete_breakpoints
# Check to see if breakpoint can be set on ending brace of function.
set bp_location10a [gdb_get_line_number "set breakpoint 10a here"]
gdb_test "hbreak $bp_location10a" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location10a\\." \
"setting hardware breakpoint at }"
gdb_test "continue" \
".*Breakpoint \[0-9\]+, main \\(argc=.*, argv=.*, envp=.*\\) at .*$srcfile:$bp_location10a.*$bp_location10a\[\t \]+}.*breakpoint 10a here.*" \
"continue to hardware breakpoint at }"
#
# Delete all breakpoints so we can start over, course this can be a test too.
#
delete_breakpoints
#
# Test temporary breakpoint at function.
#
gdb_test "thbreak main" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line.*" \
"temporary hardware breakpoint function"
delete_breakpoints
#
# Test break at function in file.
#
gdb_test "thbreak $srcfile:factorial" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line.*" \
"temporary hardware breakpoint function in file"
delete_breakpoints
#
# Test break at line number.
#
gdb_test "thbreak $bp_location1" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location1.*" \
"temporary hardware breakpoint line number #1"
delete_breakpoints
gdb_test "thbreak $bp_location6" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location6.*" \
"temporary hardware breakpoint line number #2"
delete_breakpoints
#
# Test break at line number in file.
#
gdb_test "thbreak $srcfile:$bp_location2" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location2.*" \
"temporary hardware breakpoint line number in file #1"
delete_breakpoints
set bp_location11 [gdb_get_line_number "set breakpoint 11 here"]
gdb_test "thbreak $srcfile:$bp_location11" \
"Hardware assisted breakpoint.*at.* file .*$srcfile, line $bp_location11.*" \
"temporary hardware breakpoint line number in file #2"
#
# Check to see what breakpoints are set (temporary this time).
#
gdb_test "info break" \
"Num Type.*Disp Enb Address.*What.*\[\r\n\]
\[0-9\]+\[\t \]+hw breakpoint del.*y.*in main at .*$srcfile:$bp_location11.*" \
"temporary hardware breakpoint info"
#***********
if ![runto_main] then { fail "break tests suppressed" }
# Verify that GDB responds gracefully when asked to set a breakpoint
# on a nonexistent source line.
#
gdb_test_no_output "set breakpoint pending off"
gdb_test "hbreak 999" \
"No line 999 in the current file." \
"hardware break on non-existent source line"
# Run to the desired default location. If not positioned here, the
# tests below don't work.
#
gdb_test "until $bp_location1" "main .* at .*:$bp_location1.*" \
"until bp_location1"
# Verify that GDB allows one to just say "hbreak", which is treated
# as the "default" breakpoint.
#
gdb_test "hbreak" "Hardware assisted breakpoint \[0-9\]*.*" \
"hardware break on default location"
# Verify that a "silent" breakpoint can be set, and that GDB is indeed
# "silent" about its triggering.
#
if ![runto_main] then { fail "break tests suppressed" }
gdb_test_multiple "hbreak $bp_location1" \
"set to-be-silent hardware break bp_location1" {
-re "Hardware assisted breakpoint (\[0-9\]*) at .*, line $bp_location1.*$gdb_prompt $" {
pass "set to-be-silent hardware break bp_location1"
}
}
gdb_test "commands $expect_out(1,string)\nsilent\nend" ">end" "set silent break bp_location1"
gdb_test "info break $expect_out(1,string)" \
"\[0-9\]*\[ \t\]*hw breakpoint.*:$bp_location1\r\n\[ \t\]*silent.*" \
"info silent hardware break bp_location1"
gdb_test "continue" "Continuing." \
"hit silent hardware break bp_location1"
gdb_test "bt" "#0 main .* at .*:$bp_location1.*" \
"stopped for silent hardware break bp_location1"
# Verify that GDB can at least parse a breakpoint with the
# "thread" keyword. (We won't attempt to test here that a
# thread-specific breakpoint really triggers appropriately.
# The gdb.threads subdirectory contains tests for that.)
#
set bp_location12 [gdb_get_line_number "set breakpoint 12 here"]
gdb_test "hbreak $bp_location12 thread 999" "Unknown thread 999.*" \
"thread-specific hardware breakpoint on non-existent thread disallowed"
gdb_test "hbreak $bp_location12 thread foo" \
"Invalid thread ID: foo" \
"thread-specific hardware breakpoint on bogus thread ID disallowed"
# Verify that GDB responds gracefully to a breakpoint command with
# trailing garbage.
#
gdb_test "hbreak $bp_location12 foo" \
"malformed linespec error: unexpected string, \"foo\".*" \
"hardware breakpoint with trailing garbage disallowed"
# Verify that GDB responds gracefully to a "clear" command that has
# no matching breakpoint. (First, get us off the current source line,
# which we know has a breakpoint.)
#
gdb_test "next" "marker1.*" "step over hardware breakpoint"
gdb_test "clear 81" "No breakpoint at 81.*" \
"clear line has no breakpoint disallowed"
gdb_test "clear" "No breakpoint at this line.*" \
"clear current line has no breakpoint disallowed"
delete_breakpoints
# Verify that a breakpoint can be set via a convenience variable.
#
gdb_test_no_output "set \$foo=$bp_location11" \
"set convenience variable \$foo to bp_location11"
gdb_test "hbreak \$foo" \
"Hardware assisted breakpoint (\[0-9\]*) at .*, line $bp_location11.*" \
"set hardware breakpoint via convenience variable"
delete_breakpoints
# Verify that GDB responds gracefully to an attempt to set a
# breakpoint via a convenience variable whose type is not integer.
#
gdb_test_no_output "set \$foo=81.5" \
"set convenience variable \$foo to 81.5"
gdb_test "hbreak \$foo" \
"Convenience variables used in line specs must have integer values.*" \
"set hardware breakpoint via non-integer convenience variable disallowed"
# Verify that we can set and trigger a breakpoint in a user-called function.
#
gdb_test "hbreak marker2" \
"Hardware assisted breakpoint (\[0-9\]*) at .*, line $bp_location8.*" \
"set hardware breakpoint on to-be-called function"
gdb_test "print marker2(99)" \
"The program being debugged stopped while in a function called from GDB.\r\nEvaluation of the expression containing the function\r\n.marker2. will be abandoned.\r\nWhen the function is done executing, GDB will silently stop.*" \
"hit hardware breakpoint on called function"
# As long as we're stopped (breakpointed) in a called function,
# verify that we can successfully backtrace & such from here.
gdb_test "bt" \
"#0\[ \t\]*($hex in )?marker2.*:$bp_location8\r\n#1\[ \t\]*<function called from gdb>.*" \
"backtrace while in called function"
# Return from the called function. For remote targets, it's important to do
# this before runto_main, which otherwise may silently stop on the dummy
# breakpoint inserted by GDB at the program's entry point.
#
gdb_test_multiple "finish" "finish from called function" {
-re "Run till exit from .*marker2.* at .*$bp_location8\r\n.*function called from gdb.*$gdb_prompt $" {
pass "finish from called function"
}
-re "Run till exit from .*marker2.* at .*$bp_location8\r\n.*Value returned.*$gdb_prompt $" {
pass "finish from called function"
}
}
#********
#
# Test "next" over recursive function call.
#
proc test_next_with_recursion {} {
global gdb_prompt
global decimal
global binfile
delete_breakpoints
# Can't set a hardware breakpoint without a live target, so do it now
# before it's killed below.
gdb_test "hbreak factorial" \
"Hardware assisted breakpoint $decimal at .*" \
"hardware break at factorial"
gdb_test "kill" "" "kill program" \
"Kill the program being debugged.*y or n. $" "y"
# Run until we call factorial with 6
gdb_run_cmd
if [gdb_test "" \
"Break.* factorial .value=6. .*" \
"run to factorial(6)"] then { gdb_suppress_tests }
# Continue until we call factorial recursively with 5.
if [gdb_test "continue" \
"Continuing.*Break.* factorial .value=5. .*" \
"continue to factorial(5)"] then { gdb_suppress_tests }
# Do a backtrace just to confirm how many levels deep we are.
if [gdb_test "backtrace" \
"#0\[ \t\]+ factorial .value=5..*" \
"backtrace from factorial(5)"] then { gdb_suppress_tests }
# Now a "next" should position us at the recursive call, which
# we will be performing with 4.
if [gdb_test "next" \
".* factorial .value - 1.;.*" \
"next to recursive call"] then { gdb_suppress_tests }
# Disable the breakpoint at the entry to factorial by deleting them all.
# The "next" should run until we return to the next line from this
# recursive call to factorial with 4.
# Buggy versions of gdb will stop instead at the innermost frame on
# the line where we are trying to "next" to.
delete_breakpoints
if [istarget "mips*tx39-*"] {
set timeout 60
}
# We used to set timeout here for all other targets as well. This
# is almost certainly wrong. The proper timeout depends on the
# target system in use, and how we communicate with it, so there
# is no single value appropriate for all targets. The timeout
# should be established by the Dejagnu config file(s) for the
# board, and respected by the test suite.
#
# For example, if I'm running GDB over an SSH tunnel talking to a
# portmaster in California talking to an ancient 68k board running
# a crummy ROM monitor (a situation I can only wish were
# hypothetical), then I need a large timeout. But that's not the
# kind of knowledge that belongs in this file.
gdb_test next "\[0-9\]*\[\t \]+return \\(value\\);.*" \
"next over recursive call"
# OK, we should be back in the same stack frame we started from.
# Do a backtrace just to confirm.
set result [gdb_test "backtrace" \
"#0\[ \t\]+ factorial .value=120.*\r\n#1\[ \t\]+ \[0-9a-fx\]+ in factorial .value=6..*" \
"backtrace from factorial(5.1)"]
if { $result != 0 } { gdb_suppress_tests }
if [target_info exists gdb,noresults] { gdb_suppress_tests }
gdb_continue_to_end "recursive next test"
gdb_stop_suppressing_tests
}
test_next_with_recursion
#********
# Build a new file with optimization enabled so that we can try breakpoints
# on targets with optimized prologues.
if { [prepare_for_testing hbreak2.exp "hbreak2o2" {break.c break1.c} {debug nowarnings optimize=-O2}] } {
return -1
}
if ![runto_main] then { fail "break tests suppressed" }
delete_breakpoints
#
# Test break at function.
#
gdb_test "hbreak main" \
"Hardware assisted breakpoint.*at.* file .*, line.*" \
"hardware breakpoint function, optimized file"
#
# Run until the breakpoint at main is hit. For non-stubs-using targets.
#
gdb_run_cmd
gdb_test_multiple "" "run until hardware function breakpoint, optimized file" {
-re "Breakpoint \[0-9\]+,.*main .*argc.*argv.* at .*$srcfile:$bp_location6.*$bp_location6\[\t \]+if .argc.* \{.*$gdb_prompt $" {
pass "run until hardware function breakpoint, optimized file"
}
-re "Breakpoint \[0-9\]+,.*main .*argc.*argv.* at .*$gdb_prompt $" {
pass "run until hardware function breakpoint, optimized file (code motion)"
}
}
delete_breakpoints
#
# Test break at function.
#
gdb_test "hbreak marker4" \
"Hardware assisted breakpoint.*at.* file .*$srcfile1, line.*" \
"hardware breakpoint small function, optimized file"
#
# Run until the breakpoint at a small function.
#
#
# Add a second pass pattern. The behavior differs here between stabs
# and dwarf for one-line functions. Stabs preserves two line symbols
# (one before the prologue and one after) with the same line number,
# but dwarf regards these as duplicates and discards one of them.
# Therefore the address after the prologue (where the breakpoint is)
# has no exactly matching line symbol, and GDB reports the breakpoint
# as if it were in the middle of a line rather than at the beginning.
set bp_location14 [gdb_get_line_number "set breakpoint 14 here" $srcfile1]
gdb_test_multiple "continue" \
"run until hardware breakpoint set at small function, optimized file" {
-re "Breakpoint $decimal, marker4 \\(d=(d@entry=)?177601976\\) at .*$srcfile1:$bp_location14\[\r\n\]+$bp_location14\[\t \]+void marker4.*" {
pass "run until hardware breakpoint set at small function, optimized file (line bp_location14)"
}
-re "Breakpoint $decimal, factorial \\(.*\\) .*\{\r\n$gdb_prompt" {
# GCC 4.3 emits bad line number information - see gcc/36748.
if { [test_compiler_info "gcc-4-3-*"] } {
setup_xfail *-*-*
}
fail "run until hardware breakpoint set at small function, optimized file"
}
}