#
# \brief  Test for using the GDB monitor
# \author Christian Prochaska
# \author Norman Feske
# \date   2011-05-24
#

#
# Only Genode/Fiasco.OC and Genode/NOVA supports all the tested features
# at this time
#

if {![have_spec foc] && ![have_spec nova]} {
	 puts "Run script requires foc or nova"; exit 0
}


#
# Build
#

build {
	core init
	drivers/timer drivers/uart
	app/gdb_monitor
	test/gdb_monitor
}

create_boot_directory

#
# Generate config
#

set config {
<config verbose="yes">
	<parent-provides>
		<service name="ROM"/>
		<service name="RAM"/>
		<service name="IRQ"/>
		<service name="IO_MEM"/>
		<service name="IO_PORT"/>
		<service name="CAP"/>
		<service name="PD"/>
		<service name="RM"/>
		<service name="CPU"/>
		<service name="LOG"/>
		<service name="SIGNAL"/>
	</parent-provides>
	<default-route>
		<any-service> <parent/> <any-child/> </any-service>
	</default-route>
	<start name="timer">
		<resource name="RAM" quantum="1M"/>
		<provides> <service name="Timer"/> </provides>
	</start>
	<start name="uart_drv">
		<resource name="RAM" quantum="1M"/>
		<provides> <service name="Terminal"/> </provides>
		<config>
			<policy label="gdb_monitor" uart="1"/>
		</config>
	</start>
	<start name="gdb_monitor">
		<resource name="RAM" quantum="4M"/>
		<config>
			<target name="test-gdb_monitor"/>
			<preserve name="RAM" quantum="3M"/>
		</config>
	</start>
</config>
}

install_config $config

#
# Boot modules
#

# generic modules
set boot_modules {
	core init timer
	ld.lib.so libc.lib.so libc_log.lib.so libc_lock_pipe.lib.so libc_terminal.lib.so
	uart_drv
	gdb_monitor test-gdb_monitor
}

build_boot_image $boot_modules

#
# Execute test case
#
#
set local_port 5555

# qemu config
append qemu_args " -m 128 -nographic "

# connect comport 0 to stdio
append qemu_args " -serial mon:stdio "

# connect comport 1 with TCP port $local_port
append qemu_args " -serial chardev:uart "
append qemu_args " -chardev socket,id=uart,port=$local_port,host=localhost,server,nowait "

run_genode_until {.*Remote debugging using /dev/terminal.*} 30

puts "GDB monitor is up, starting GDB"

# sequence of GDB commands to execute at startup
set gdb_cmds ""
append gdb_cmds {-ex "target remote localhost:$local_port" }

#
# The test breaks into the 'main()' function of the dynamically linked test
# application by using the following gdb command sequence. It's important that
# the 'main()' breakpoint gets set before the 'sharedlibrary' command is
# executed. Otherwise the breakpoint would get set in ld.lib.so's main()
# function.
#

# don't ask for y/n when loading a new symbol file
append gdb_cmds {-ex "set interactive-mode off" }

# load the symbols of ld.lib.so
append gdb_cmds {-ex "symbol-file bin/ld.lib.so" }

# set a breakpoint in the 'call_main()' function
append gdb_cmds {-ex "b call_main" }

# continue execution until the breakpoint triggers
append gdb_cmds {-ex "c" }

# delete the 'call_main()' breakpoint
append gdb_cmds {-ex "delete 1" }

# load the symbols of the test application
append gdb_cmds {-ex "symbol-file bin/test-gdb_monitor" }

# set a breakpoint in the application's 'main()' function
append gdb_cmds {-ex "b main" }

# load the symbols of loaded shared libraries
append gdb_cmds {-ex "sharedlibrary" }

# continue execution until the breakpoint triggers
append gdb_cmds {-ex "c" }

# delete the 'main()' breakpoint
append gdb_cmds {-ex "delete 2" }

#
# Test commands
#

# test: breakpoint in shared library 
append gdb_cmds {-ex "b puts" }
append gdb_cmds {-ex "c" }

# test: stack trace when not in syscall
append gdb_cmds {-ex "bt" }

# test: thread info
append gdb_cmds {-ex "b Test_thread::entry()" }
append gdb_cmds {-ex "c" }
append gdb_cmds {-ex "info threads" }

# test: single stepping
append gdb_cmds {-ex "step" }

# test: catch segmentation fault
append gdb_cmds {-ex "c" }

# test: stack trace when in syscall
append gdb_cmds {-ex "thread 1" }
append gdb_cmds {-ex "bt" }

# quit
append gdb_cmds {-ex "q" }

# run GDB and redirect stderr to stdio to get the relevant output into the expect buffer  
eval spawn [gdb] bin/test-gdb_monitor -batch $gdb_cmds 2&>1

set timeout 60
expect {
	timeout { puts stderr "Error: Test execution timed out"; exit -2 }
}

set gdb_output $expect_out(buffer)

#
# Evaluate the test results
#

if {![regexp {Breakpoint 2, main ()} $gdb_output]} {
	puts stderr "Error: Breakpoint in main() did not trigger"
	exit -1
}

if {![regexp {Breakpoint 3, puts ()} $gdb_output]} {
	puts "Error: Breakpoint in shared library did not trigger"
	exit -1
}

if {![regexp {#0  puts} $gdb_output] ||
    ![regexp {in func2 ()} $gdb_output] ||
    ![regexp {in func1 ()} $gdb_output] ||
    ![regexp {in main ()} $gdb_output]} {
	puts stderr "Error: Stack trace when not in syscall is not as expected"
	exit -1
}

if {![regexp {Breakpoint 4, Test_thread::entry()} $gdb_output]} {
	puts stderr "Error: Breakpoint in test thread did not trigger"
	exit -1
}

if {![regexp {\* 2    Thread 2          Test_thread::entry} $gdb_output] || 
    ![regexp {  1    Thread 1} $gdb_output]} {
	puts stderr "Error: Thread info is not as expected"
	exit -1
}

if {![regexp {40				func()} $gdb_output]} {
	puts stderr "Error: Single stepping didn't result in the expected output"
	exit -1
}

if {![regexp {Program received signal SIGSEGV, Segmentation fault.} $gdb_output]} {
	puts stderr "Error: Segmentation fault exception was not catched"
	exit -1
}

if {![regexp {Genode::Ipc_istream::_wait} $gdb_output] ||
    ![regexp {Genode::Ipc_server::_wait} $gdb_output] ||
    ![regexp {Genode::sleep_forever ()} $gdb_output]} {
	puts stderr "Error: Stack trace when in syscall is not as expected"
	exit -1
}

puts "Test succeeded"

# vi: set ft=tcl :