X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Ftestsuite%2Flib%2Fgdb.exp;h=25d370ebb52832af97287a3b9e1d807d35960bd4;hb=2e62ab400ff96334c92e5acf0a462cb9dc0d19a7;hp=5659906c0b9e590762aff6f74d97cdd81fb9a727;hpb=3d3389010c00504602656ba6f16c6b91ade75243;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 5659906c0b..25d370ebb5 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -1,4 +1,4 @@
-# Copyright 1992-2015 Free Software Foundation, Inc.
+# Copyright 1992-2019 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
@@ -28,6 +28,7 @@ if {$tool == ""} {
 load_lib libgloss.exp
 load_lib cache.exp
 load_lib gdb-utils.exp
+load_lib memory.exp
 
 global GDB
 
@@ -81,7 +82,8 @@ if ![info exists gdb_prompt] then {
 }
 
 # A regexp that matches the pagination prompt.
-set pagination_prompt [string_to_regexp "---Type <return> to continue, or q <return> to quit---"]
+set pagination_prompt \
+    "--Type <RET> for more, q to quit, c to continue without paging--"
 
 # The variable fullname_syntax_POSIX is a regexp which matches a POSIX 
 # absolute path ie. /foo/ 
@@ -117,6 +119,10 @@ set octal "\[0-7\]+"
 
 set inferior_exited_re "(\\\[Inferior \[0-9\]+ \\(.*\\) exited)"
 
+# A regular expression that matches a value history number.
+# E.g., $1, $2, etc.
+set valnum_re "\\\$$decimal"
+
 ### Only procedures should come after this point.
 
 #
@@ -221,6 +227,19 @@ proc delete_breakpoints {} {
     }
 }
 
+# Returns true iff the target supports using the "run" command.
+
+proc target_can_use_run_cmd {} {
+    if [target_info exists use_gdb_stub] {
+	# In this case, when we connect, the inferior is already
+	# running.
+	return 0
+    }
+
+    # Assume yes.
+    return 1
+}
+
 # Generic run command.
 #
 # The second pattern below matches up to the first newline *only*.
@@ -365,9 +384,46 @@ proc gdb_start_cmd {args} {
     return -1
 }
 
+# Generic starti command.  Return 0 if we could start the program, -1
+# if we could not.
+#
+# N.B. This function does not wait for gdb to return to the prompt,
+# that is the caller's responsibility.
+
+proc gdb_starti_cmd {args} {
+    global gdb_prompt use_gdb_stub
+
+    foreach command [gdb_init_commands] {
+	send_gdb "$command\n"
+	gdb_expect 30 {
+	    -re "$gdb_prompt $" { }
+	    default {
+		perror "gdb_init_command for target failed"
+		return -1
+	    }
+	}
+    }
+
+    if $use_gdb_stub {
+	return -1
+    }
+
+    send_gdb "starti $args\n"
+    gdb_expect 60 {
+	-re "The program .* has been started already.*y or n. $" {
+	    send_gdb "y\n"
+	    exp_continue
+	}
+	-re "Starting program: \[^\r\n\]*" {
+	    return 0
+	}
+    }
+    return -1
+}
+
 # Set a breakpoint at FUNCTION.  If there is an additional argument it is
 # a list of options; the supported options are allow-pending, temporary,
-# message, no-message, and passfail.
+# message, no-message, passfail and qualified.
 # The result is 1 for success, 0 for failure.
 #
 # Note: The handling of message vs no-message is messed up, but it's based
@@ -392,6 +448,10 @@ proc gdb_breakpoint { function args } {
 	set break_message "Temporary breakpoint"
     }
 
+    if {[lsearch -exact $args qualified] != -1} {
+	append break_command " -qualified"
+    }
+
     set print_pass 0
     set print_fail 1
     set no_message_loc [lsearch -exact $args no-message]
@@ -519,7 +579,7 @@ proc runto { function args } {
 	}
 	-re "The target does not support running in non-stop mode.\r\n$gdb_prompt $" {
 	    if { $print_fail } {
-		unsupported "Non-stop mode not supported"
+		unsupported "non-stop mode not supported"
 	    }
 	    return 0
 	}
@@ -846,10 +906,13 @@ proc gdb_test_multiple { command message user_code } {
 	}
     }
     append code $processed_code
+
+    # Reset the spawn id, in case the processed code used -i.
     append code {
-	# Reset the spawn id, in case the processed code used -i.
 	-i "$gdb_spawn_id"
+    }
 
+    append code {
 	-re "Ending remote debugging.*$gdb_prompt $" {
 	    if ![isnative] then {
 		warning "Can`t communicate to remote target."
@@ -920,7 +983,20 @@ proc gdb_test_multiple { command message user_code } {
 	    set result -1
 	}
 
-	# Patterns below apply to any spawn id specified.
+	-i $gdb_spawn_id
+	eof {
+	    perror "GDB process no longer exists"
+	    set wait_status [wait -i $gdb_spawn_id]
+	    verbose -log "GDB process exited with wait status $wait_status"
+	    if { $message != "" } {
+		fail "$message"
+	    }
+	    return -1
+	}
+    }
+
+    # Now patterns that apply to any spawn id specified.
+    append code {
 	-i $any_spawn_id
 	eof {
 	    perror "Process no longer exists"
@@ -942,6 +1018,20 @@ proc gdb_test_multiple { command message user_code } {
 	}
     }
 
+    # remote_expect calls the eof section if there is an error on the
+    # expect call.  We already have eof sections above, and we don't
+    # want them to get called in that situation.  Since the last eof
+    # section becomes the error section, here we define another eof
+    # section, but with an empty spawn_id list, so that it won't ever
+    # match.
+    append code {
+	-i "" eof {
+	    # This comment is here because the eof section must not be
+	    # the empty string, otherwise remote_expect won't realize
+	    # it exists.
+	}
+    }
+
     set result 0
     set code [catch {gdb_expect $code} string]
     if {$code == 1} {
@@ -959,7 +1049,9 @@ proc gdb_test_multiple { command message user_code } {
 # COMMAND is the command to execute, send to GDB with send_gdb.  If
 #   this is the null string no command is sent.
 # PATTERN is the pattern to match for a PASS, and must NOT include
-#   the \r\n sequence immediately before the gdb prompt.
+#   the \r\n sequence immediately before the gdb prompt.  This argument
+#   may be omitted to just match the prompt, ignoring whatever output 
+#   precedes it.
 # MESSAGE is an optional message to be printed.  If this is
 #   omitted, then the pass/fail messages use the command string as the
 #   message.  (If this is the empty string, then sometimes we don't
@@ -974,9 +1066,7 @@ proc gdb_test_multiple { command message user_code } {
 #   -1 if there was an internal error.
 #  
 proc gdb_test { args } {
-    global verbose
     global gdb_prompt
-    global GDB
     upvar timeout timeout
 
     if [llength $args]>2 then {
@@ -995,7 +1085,7 @@ proc gdb_test { args } {
     }
 
     return [gdb_test_multiple $command $message {
-	-re "\[\r\n\]*($pattern)\[\r\n\]+$gdb_prompt $" {
+	-re "\[\r\n\]*(?:$pattern)\[\r\n\]+$gdb_prompt $" {
 	    if ![string match "" $message] then {
 		pass "$message"
             }
@@ -1038,7 +1128,8 @@ proc gdb_test_no_output { args } {
 # This is useful when the sequence is long and contains ".*", a single
 # regexp to match the entire output can get a timeout much easier.
 #
-# COMMAND is the command to send.
+# COMMAND is the command to execute, send to GDB with send_gdb.  If
+#   this is the null string no command is sent.
 # TEST_NAME is passed to pass/fail.  COMMAND is used if TEST_NAME is "".
 # EXPECTED_OUTPUT_LIST is a list of regexps of expected output, which are
 # processed in order, and all must be present in the output.
@@ -1061,7 +1152,9 @@ proc gdb_test_sequence { command test_name expected_output_list } {
 	set test_name $command
     }
     lappend expected_output_list ""; # implicit ".*" before gdb prompt
-    send_gdb "$command\n"
+    if { $command != "" } {
+	send_gdb "$command\n"
+    }
     return [gdb_expect_list $test_name "$gdb_prompt $" $expected_output_list]
 }
 
@@ -1297,6 +1390,36 @@ proc gdb_test_stdio {command inferior_pattern {gdb_pattern ""} {message ""}} {
     return $res
 }
 
+# get_print_expr_at_depths EXP OUTPUTS
+#
+# Used for testing 'set print max-depth'.  Prints the expression EXP
+# with 'set print max-depth' set to various depths.  OUTPUTS is a list
+# of `n` different patterns to match at each of the depths from 0 to
+# (`n` - 1).
+#
+# This proc does one final check with the max-depth set to 'unlimited'
+# which is tested against the last pattern in the OUTPUTS list.  The
+# OUTPUTS list is therefore required to match every depth from 0 to a
+# depth where the whole of EXP is printed with no ellipsis.
+#
+# This proc leaves the 'set print max-depth' set to 'unlimited'.
+proc gdb_print_expr_at_depths {exp outputs} {
+    for { set depth 0 } { $depth <= [llength $outputs] } { incr depth } {
+	if { $depth == [llength $outputs] } {
+	    set expected_result [lindex $outputs [expr [llength $outputs] - 1]]
+	    set depth_string "unlimited"
+	} else {
+	    set expected_result [lindex $outputs $depth]
+	    set depth_string $depth
+	}
+
+	with_test_prefix "exp='$exp': depth=${depth_string}" {
+	    gdb_test_no_output "set print max-depth ${depth_string}"
+	    gdb_test "p $exp" "$expected_result"
+	}
+    }
+}
+
 
 
 # Issue a PASS and return true if evaluating CONDITION in the caller's
@@ -1359,7 +1482,7 @@ proc default_gdb_exit {} {
     global GDB
     global INTERNAL_GDBFLAGS GDBFLAGS
     global verbose
-    global gdb_spawn_id
+    global gdb_spawn_id inferior_spawn_id
     global inotify_log_file
 
     gdb_stop_suppressing_tests
@@ -1400,6 +1523,7 @@ proc default_gdb_exit {} {
 	remote_close host
     }
     unset gdb_spawn_id
+    unset inferior_spawn_id
 }
 
 # Load a file into the debugger.
@@ -1459,17 +1583,17 @@ proc gdb_file_cmd { arg } {
 
     send_gdb "file $arg\n"
     gdb_expect 120 {
-	-re "Reading symbols from.*LZMA support was disabled.*done.*$gdb_prompt $" {
+	-re "Reading symbols from.*LZMA support was disabled.*$gdb_prompt $" {
 	    verbose "\t\tLoaded $arg into $GDB; .gnu_debugdata found but no LZMA available"
 	    set gdb_file_cmd_debug_info "lzma"
 	    return 0
 	}
-	-re "Reading symbols from.*no debugging symbols found.*done.*$gdb_prompt $" {
+	-re "Reading symbols from.*no debugging symbols found.*$gdb_prompt $" {
 	    verbose "\t\tLoaded $arg into $GDB with no debugging symbols"
 	    set gdb_file_cmd_debug_info "nodebug"
 	    return 0
 	}
-        -re "Reading symbols from.*done.*$gdb_prompt $" {
+        -re "Reading symbols from.*$gdb_prompt $" {
             verbose "\t\tLoaded $arg into $GDB"
 	    set gdb_file_cmd_debug_info "debug"
 	    return 0
@@ -1477,7 +1601,7 @@ proc gdb_file_cmd { arg } {
         -re "Load new symbol table from \".*\".*y or n. $" {
             send_gdb "y\n"
             gdb_expect 120 {
-                -re "Reading symbols from.*done.*$gdb_prompt $" {
+                -re "Reading symbols from.*$gdb_prompt $" {
                     verbose "\t\tLoaded $arg with new symbol table into $GDB"
 		    set gdb_file_cmd_debug_info "debug"
 		    return 0
@@ -1563,7 +1687,7 @@ proc default_gdb_spawn { } {
 # Default gdb_start procedure.
 
 proc default_gdb_start { } {
-    global gdb_prompt pagination_prompt
+    global gdb_prompt
     global gdb_spawn_id
     global inferior_spawn_id
 
@@ -1584,29 +1708,20 @@ proc default_gdb_start { } {
     # When running over NFS, particularly if running many simultaneous
     # tests on different hosts all using the same server, things can
     # get really slow.  Give gdb at least 3 minutes to start up.
-    set loop_again 1
-    while { $loop_again } {
-	set loop_again 0
-	gdb_expect 360 {
-	    -re "$pagination_prompt" {
-		verbose "Hit pagination during startup. Pressing enter to continue."
-		send_gdb "\n"
-		set loop_again 1
-	    }
-	    -re "\[\r\n\]$gdb_prompt $" {
-		verbose "GDB initialized."
-	    }
-	    -re "$gdb_prompt $"	{
-		perror "GDB never initialized."
-		unset gdb_spawn_id
-		return -1
-	    }
-	    timeout	{
-		perror "(timeout) GDB never initialized after 10 seconds."
-		remote_close host
-		unset gdb_spawn_id
-		return -1
-	    }
+    gdb_expect 360 {
+	-re "\[\r\n\]$gdb_prompt $" {
+	    verbose "GDB initialized."
+	}
+	-re "$gdb_prompt $"	{
+	    perror "GDB never initialized."
+	    unset gdb_spawn_id
+	    return -1
+	}
+	timeout	{
+	    perror "(timeout) GDB never initialized after 10 seconds."
+	    remote_close host
+	    unset gdb_spawn_id
+	    return -1
 	}
     }
 
@@ -1721,56 +1836,52 @@ proc skip_go_tests {} {
     return 0
 }
 
-# Return a 1 if I don't even want to try to test java.
-
-proc skip_java_tests {} {
-    return 0
-}
-
 # Return a 1 if I don't even want to try to test D.
 
 proc skip_d_tests {} {
     return 0
 }
 
+# Return 1 to skip Rust tests, 0 to try them.
+proc skip_rust_tests {} {
+    return [expr {![isnative]}]
+}
+
 # Return a 1 for configurations that do not support Python scripting.
+# PROMPT_REGEXP is the expected prompt.
 
-proc skip_python_tests {} {
-    global gdb_prompt
+proc skip_python_tests_prompt { prompt_regexp } {
     global gdb_py_is_py3k
-    global gdb_py_is_py24
 
     gdb_test_multiple "python print ('test')" "verify python support" {
-	-re "not supported.*$gdb_prompt $"	{
+	-re "not supported.*$prompt_regexp" {
 	    unsupported "Python support is disabled."
 	    return 1
 	}
-	-re "$gdb_prompt $"	{}
+	-re "$prompt_regexp" {}
     }
 
-    set gdb_py_is_py24 0
     gdb_test_multiple "python print (sys.version_info\[0\])" "check if python 3" {
-	-re "3.*$gdb_prompt $"	{
+	-re "3.*$prompt_regexp" {
             set gdb_py_is_py3k 1
         }
-	-re ".*$gdb_prompt $"	{
+	-re ".*$prompt_regexp" {
             set gdb_py_is_py3k 0
         }
     }
-    if { $gdb_py_is_py3k == 0 } {
-        gdb_test_multiple "python print (sys.version_info\[1\])" "check if python 2.4" {
-	    -re "\[45\].*$gdb_prompt $" {
-                set gdb_py_is_py24 1
-            }
-	    -re ".*$gdb_prompt $" {
-                set gdb_py_is_py24 0
-            }
-        }
-    }
 
     return 0
 }
 
+# Return a 1 for configurations that do not support Python scripting.
+# Note: This also sets various globals that specify which version of Python
+# is in use.  See skip_python_tests_prompt.
+
+proc skip_python_tests {} {
+    global gdb_prompt
+    return [skip_python_tests_prompt "$gdb_prompt $"]
+}
+
 # Return a 1 if we should skip shared library tests.
 
 proc skip_shlib_tests {} {
@@ -1897,6 +2008,117 @@ proc with_test_prefix { prefix body } {
   }
 }
 
+# Wrapper for foreach that calls with_test_prefix on each iteration,
+# including the iterator's name and current value in the prefix.
+
+proc foreach_with_prefix {var list body} {
+    upvar 1 $var myvar
+    foreach myvar $list {
+	with_test_prefix "$var=$myvar" {
+	    uplevel 1 $body
+	}
+    }
+}
+
+# Like TCL's native proc, but defines a procedure that wraps its body
+# within 'with_test_prefix "$proc_name" { ... }'.
+proc proc_with_prefix {name arguments body} {
+    # Define the advertised proc.
+    proc $name $arguments [list with_test_prefix $name $body]
+}
+
+
+# Run BODY in the context of the caller.  After BODY is run, the variables
+# listed in VARS will be reset to the values they had before BODY was run.
+#
+# This is useful for providing a scope in which it is safe to temporarily
+# modify global variables, e.g.
+#
+#   global INTERNAL_GDBFLAGS
+#   global env
+#
+#   set foo GDBHISTSIZE
+#
+#   save_vars { INTERNAL_GDBFLAGS env($foo) env(HOME) } {
+#       append INTERNAL_GDBFLAGS " -nx"
+#       unset -nocomplain env(GDBHISTSIZE)
+#       gdb_start
+#       gdb_test ...
+#   }
+#
+# Here, although INTERNAL_GDBFLAGS, env(GDBHISTSIZE) and env(HOME) may be
+# modified inside BODY, this proc guarantees that the modifications will be
+# undone after BODY finishes executing.
+
+proc save_vars { vars body } {
+    array set saved_scalars { }
+    array set saved_arrays { }
+    set unset_vars { }
+
+    foreach var $vars {
+	# First evaluate VAR in the context of the caller in case the variable
+	# name may be a not-yet-interpolated string like env($foo)
+	set var [uplevel 1 list $var]
+
+	if [uplevel 1 [list info exists $var]] {
+	    if [uplevel 1 [list array exists $var]] {
+		set saved_arrays($var) [uplevel 1 [list array get $var]]
+	    } else {
+		set saved_scalars($var) [uplevel 1 [list set $var]]
+	    }
+	} else {
+	    lappend unset_vars $var
+	}
+    }
+
+    set code [catch {uplevel 1 $body} result]
+
+    foreach {var value} [array get saved_scalars] {
+	uplevel 1 [list set $var $value]
+    }
+
+    foreach {var value} [array get saved_arrays] {
+	uplevel 1 [list unset $var]
+	uplevel 1 [list array set $var $value]
+    }
+
+    foreach var $unset_vars {
+	uplevel 1 [list unset -nocomplain $var]
+    }
+
+    if {$code == 1} {
+	global errorInfo errorCode
+	return -code $code -errorinfo $errorInfo -errorcode $errorCode $result
+    } else {
+	return -code $code $result
+    }
+}
+
+# Run tests in BODY with the current working directory (CWD) set to
+# DIR.  When BODY is finished, restore the original CWD.  Return the
+# result of BODY.
+#
+# This procedure doesn't check if DIR is a valid directory, so you
+# have to make sure of that.
+
+proc with_cwd { dir body } {
+    set saved_dir [pwd]
+    verbose -log "Switching to directory $dir (saved CWD: $saved_dir)."
+    cd $dir
+
+    set code [catch {uplevel 1 $body} result]
+
+    verbose -log "Switching back to $saved_dir."
+    cd $saved_dir
+
+    if {$code == 1} {
+	global errorInfo errorCode
+	return -code $code -errorinfo $errorInfo -errorcode $errorCode $result
+    } else {
+	return -code $code $result
+    }
+}
+
 # Run tests in BODY with GDB prompt and variable $gdb_prompt set to
 # PROMPT.  When BODY is finished, restore GDB prompt and variable
 # $gdb_prompt.
@@ -1981,6 +2203,56 @@ proc with_target_charset { target_charset body } {
     }
 }
 
+# Switch the default spawn id to SPAWN_ID, so that gdb_test,
+# mi_gdb_test etc. default to using it.
+
+proc switch_gdb_spawn_id {spawn_id} {
+    global gdb_spawn_id
+    global board board_info
+
+    set gdb_spawn_id $spawn_id
+    set board [host_info name]
+    set board_info($board,fileid) $spawn_id
+}
+
+# Clear the default spawn id.
+
+proc clear_gdb_spawn_id {} {
+    global gdb_spawn_id
+    global board board_info
+
+    unset -nocomplain gdb_spawn_id
+    set board [host_info name]
+    unset -nocomplain board_info($board,fileid)
+}
+
+# Run BODY with SPAWN_ID as current spawn id.
+
+proc with_spawn_id { spawn_id body } {
+    global gdb_spawn_id
+
+    if [info exists gdb_spawn_id] {
+	set saved_spawn_id $gdb_spawn_id
+    }
+
+    switch_gdb_spawn_id $spawn_id
+
+    set code [catch {uplevel 1 $body} result]
+
+    if [info exists saved_spawn_id] {
+	switch_gdb_spawn_id $saved_spawn_id
+    } else {
+	clear_gdb_spawn_id
+    }
+
+    if {$code == 1} {
+	global errorInfo errorCode
+	return -code $code -errorinfo $errorInfo -errorcode $errorCode $result
+    } else {
+	return -code $code $result
+    }
+}
+
 # Select the largest timeout from all the timeouts:
 # - the local "timeout" variable of the scope two levels above,
 # - the global "timeout" variable,
@@ -2032,35 +2304,23 @@ proc with_timeout_factor { factor body } {
 # Return 1 if _Complex types are supported, otherwise, return 0.
 
 gdb_caching_proc support_complex_tests {
-    # Set up, compile, and execute a test program containing _Complex types.
-    # Include the current process ID in the file names to prevent conflicts
-    # with invocations for multiple testsuites.
-    set src [standard_temp_file complex[pid].c]
-    set exe [standard_temp_file complex[pid].x]
 
-    gdb_produce_source $src {
+    if { [gdb_skip_float_test] } {
+	# If floating point is not supported, _Complex is not
+	# supported.
+	return 0
+    }
+
+    # Compile a test program containing _Complex types.
+
+    return [gdb_can_simple_compile complex {
 	int main() {
 	    _Complex float cf;
 	    _Complex double cd;
 	    _Complex long double cld;
 	    return 0;
 	}
-    }
-
-    verbose "compiling testfile $src" 2
-    set compile_flags {debug nowarnings quiet}
-    set lines [gdb_compile $src $exe executable $compile_flags]
-    file delete $src
-    file delete $exe
-
-    if ![string match "" $lines] then {
-        verbose "testfile compilation failed, returning 0" 2
-        set result 0
-    } else {
-	set result 1
-    }
-
-    return $result
+    } executable]
 }
 
 # Return 1 if GDB can get a type for siginfo from the target, otherwise
@@ -2074,15 +2334,10 @@ proc supports_get_siginfo_type {} {
     }
 }
 
-# Return 1 if target hardware or OS supports single stepping to signal
-# handler, otherwise, return 0.
+# Return 1 if the target supports hardware single stepping.
 
-proc can_single_step_to_signal_handler {} {
+proc can_hardware_single_step {} {
 
-    # Targets don't have hardware single step.  On these targets, when
-    # a signal is delivered during software single step, gdb is unable
-    # to determine the next instruction addresses, because start of signal
-    # handler is one of them.
     if { [istarget "arm*-*-*"] || [istarget "mips*-*-*"]
 	 || [istarget "tic6x-*-*"] || [istarget "sparc*-*-linux*"]
 	 || [istarget "nios2-*-*"] } {
@@ -2092,6 +2347,17 @@ proc can_single_step_to_signal_handler {} {
     return 1
 }
 
+# Return 1 if target hardware or OS supports single stepping to signal
+# handler, otherwise, return 0.
+
+proc can_single_step_to_signal_handler {} {
+    # Targets don't have hardware single step.  On these targets, when
+    # a signal is delivered during software single step, gdb is unable
+    # to determine the next instruction addresses, because start of signal
+    # handler is one of them.
+    return [can_hardware_single_step]
+}
+
 # Return 1 if target supports process record, otherwise return 0.
 
 proc supports_process_record {} {
@@ -2103,7 +2369,8 @@ proc supports_process_record {} {
     if { [istarget "arm*-*-linux*"] || [istarget "x86_64-*-linux*"]
          || [istarget "i\[34567\]86-*-linux*"]
          || [istarget "aarch64*-*-linux*"]
-         || [istarget "powerpc*-*-linux*"] } {
+         || [istarget "powerpc*-*-linux*"]
+         || [istarget "s390*-*-linux*"] } {
 	return 1
     }
 
@@ -2121,7 +2388,8 @@ proc supports_reverse {} {
     if { [istarget "arm*-*-linux*"] || [istarget "x86_64-*-linux*"]
          || [istarget "i\[34567\]86-*-linux*"]
          || [istarget "aarch64*-*-linux*"]
-         || [istarget "powerpc*-*-linux*"] } {
+         || [istarget "powerpc*-*-linux*"]
+         || [istarget "s390*-*-linux*"] } {
 	return 1
     }
 
@@ -2147,21 +2415,9 @@ proc readline_is_used { } {
 gdb_caching_proc is_elf_target {
     set me "is_elf_target"
 
-    set src [standard_temp_file is_elf_target[pid].c]
-    set obj [standard_temp_file is_elf_target[pid].o]
-
-    gdb_produce_source $src {
-	int foo () {return 0;}
-    }
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $obj object {quiet}]
-
-    file delete $src
-
-    if ![string match "" $lines] then {
-	verbose "$me:  testfile compilation failed, returning 0" 2
-	return 0
+    set src { int foo () {return 0;} }
+    if {![gdb_simple_compile elf_target $src]} {
+        return 0
     }
 
     set fp_obj [open $obj "r"]
@@ -2214,86 +2470,32 @@ proc gdb_produce_source { name sources } {
 # This cannot be decided simply from looking at the target string,
 # as it might depend on externally passed compiler options like -m64.
 gdb_caching_proc is_ilp32_target {
-    set me "is_ilp32_target"
-
-    set src [standard_temp_file ilp32[pid].c]
-    set obj [standard_temp_file ilp32[pid].o]
-
-    gdb_produce_source $src {
+    return [gdb_can_simple_compile is_ilp32_target {
 	int dummy[sizeof (int) == 4
 		  && sizeof (void *) == 4
 		  && sizeof (long) == 4 ? 1 : -1];
-    }
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $obj object {quiet}]
-    file delete $src
-    file delete $obj
-
-    if ![string match "" $lines] then {
-        verbose "$me:  testfile compilation failed, returning 0" 2
-        return 0
-    }
-
-    verbose "$me:  returning 1" 2
-    return 1
+    }]
 }
 
 # Return 1 if target is LP64.
 # This cannot be decided simply from looking at the target string,
 # as it might depend on externally passed compiler options like -m64.
 gdb_caching_proc is_lp64_target {
-    set me "is_lp64_target"
-
-    set src [standard_temp_file lp64[pid].c]
-    set obj [standard_temp_file lp64[pid].o]
-
-    gdb_produce_source $src {
+    return [gdb_can_simple_compile is_lp64_target {
 	int dummy[sizeof (int) == 4
 		  && sizeof (void *) == 8
 		  && sizeof (long) == 8 ? 1 : -1];
-    }
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $obj object {quiet}]
-    file delete $src
-    file delete $obj
-
-    if ![string match "" $lines] then {
-        verbose "$me:  testfile compilation failed, returning 0" 2
-        return 0
-    }
-
-    verbose "$me:  returning 1" 2
-    return 1
+    }]
 }
 
 # Return 1 if target has 64 bit addresses.
 # This cannot be decided simply from looking at the target string,
 # as it might depend on externally passed compiler options like -m64.
 gdb_caching_proc is_64_target {
-    set me "is_64_target"
-
-    set src [standard_temp_file is64[pid].c]
-    set obj [standard_temp_file is64[pid].o]
-
-    gdb_produce_source $src {
+    return [gdb_can_simple_compile is_64_target {
 	int function(void) { return 3; }
 	int dummy[sizeof (&function) == 8 ? 1 : -1];
-    }
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $obj object {quiet}]
-    file delete $src
-    file delete $obj
-
-    if ![string match "" $lines] then {
-        verbose "$me:  testfile compilation failed, returning 0" 2
-        return 0
-    }
-
-    verbose "$me:  returning 1" 2
-    return 1
+    }]
 }
 
 # Return 1 if target has x86_64 registers - either amd64 or x32.
@@ -2304,30 +2506,14 @@ gdb_caching_proc is_amd64_regs_target {
 	return 0
     }
 
-    set me "is_amd64_regs_target"
+    return [gdb_can_simple_compile is_amd64_regs_target {
+	int main (void) {
+	    asm ("incq %rax");
+	    asm ("incq %r15");
 
-    set src [standard_temp_file reg64[pid].s]
-    set obj [standard_temp_file reg64[pid].o]
-
-    set list {}
-    foreach reg \
-	{rax rbx rcx rdx rsi rdi rbp rsp r8 r9 r10 r11 r12 r13 r14 r15} {
-	    lappend list "\tincq %$reg"
+	    return 0;
 	}
-    gdb_produce_source $src [join $list \n]
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $obj object {quiet}]
-    file delete $src
-    file delete $obj
-
-    if ![string match "" $lines] then {
-        verbose "$me:  testfile compilation failed, returning 0" 2
-        return 0
-    }
-
-    verbose "$me:  returning 1" 2
-    return 1
+    }]
 }
 
 # Return 1 if this target is an x86 or x86-64 with -m32.
@@ -2349,30 +2535,13 @@ gdb_caching_proc is_aarch32_target {
 	return 0
     }
 
-    set me "is_aarch32_target"
-
-    set src [standard_temp_file aarch32[pid].s]
-    set obj [standard_temp_file aarch32[pid].o]
-
     set list {}
     foreach reg \
 	{r0 r1 r2 r3} {
 	    lappend list "\tmov $reg, $reg"
 	}
-    gdb_produce_source $src [join $list \n]
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $obj object {quiet}]
-    file delete $src
-    file delete $obj
 
-    if ![string match "" $lines] then {
-	verbose "$me:  testfile compilation failed, returning 0" 2
-	return 0
-    }
-
-    verbose "$me:  returning 1" 2
-    return 1
+    return [gdb_can_simple_compile aarch32 [join $list \n]]
 }
 
 # Return 1 if this target is an aarch64, either lp64 or ilp32.
@@ -2390,7 +2559,8 @@ proc support_displaced_stepping {} {
 
     if { [istarget "x86_64-*-linux*"] || [istarget "i\[34567\]86-*-linux*"]
 	 || [istarget "arm*-*-linux*"] || [istarget "powerpc-*-linux*"]
-	 || [istarget "powerpc64-*-linux*"] || [istarget "s390*-*-*"] } {
+	 || [istarget "powerpc64-*-linux*"] || [istarget "s390*-*-*"]
+	 || [istarget "aarch64*-*-linux*"] } {
 	return 1
     }
 
@@ -2412,27 +2582,21 @@ gdb_caching_proc skip_altivec_tests {
     }
 
     # Make sure we have a compiler that understands altivec.
-    set compile_flags {debug nowarnings}
     if [get_compiler_info] {
        warning "Could not get compiler info"
        return 1
     }
     if [test_compiler_info gcc*] {
-        set compile_flags "$compile_flags additional_flags=-maltivec"
+        set compile_flags "additional_flags=-maltivec"
     } elseif [test_compiler_info xlc*] {
-        set compile_flags "$compile_flags additional_flags=-qaltivec"
+        set compile_flags "additional_flags=-qaltivec"
     } else {
         verbose "Could not compile with altivec support, returning 1" 2
         return 1
     }
 
-    # Set up, compile, and execute a test program containing VMX instructions.
-    # Include the current process ID in the file names to prevent conflicts
-    # with invocations for multiple testsuites.
-    set src [standard_temp_file vmx[pid].c]
-    set exe [standard_temp_file vmx[pid].x]
-
-    gdb_produce_source $src {
+    # Compile a test program containing VMX instructions.
+    set src {
 	int main() {
 	    #ifdef __MACH__
 	    asm volatile ("vor v0,v0,v0");
@@ -2442,22 +2606,16 @@ gdb_caching_proc skip_altivec_tests {
 	    return 0;
 	}
     }
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $exe executable $compile_flags]
-    file delete $src
-
-    if ![string match "" $lines] then {
-        verbose "$me:  testfile compilation failed, returning 1" 2
+    if {![gdb_simple_compile $me $src executable $compile_flags]} {
         return 1
     }
 
-    # No error message, compilation succeeded so now run it via gdb.
+    # Compilation succeeded so now run it via gdb.
 
     gdb_exit
     gdb_start
     gdb_reinitialize_dir $srcdir/$subdir
-    gdb_load "$exe"
+    gdb_load "$obj"
     gdb_run_cmd
     gdb_expect {
         -re ".*Illegal instruction.*${gdb_prompt} $" {
@@ -2474,7 +2632,7 @@ gdb_caching_proc skip_altivec_tests {
         }
     }
     gdb_exit
-    remote_file build delete $exe
+    remote_file build delete $obj
 
     verbose "$me:  returning $skip_vmx_tests" 2
     return $skip_vmx_tests
@@ -2496,24 +2654,21 @@ gdb_caching_proc skip_vsx_tests {
     }
 
     # Make sure we have a compiler that understands altivec.
-    set compile_flags {debug nowarnings quiet}
     if [get_compiler_info] {
        warning "Could not get compiler info"
        return 1
     }
     if [test_compiler_info gcc*] {
-        set compile_flags "$compile_flags additional_flags=-mvsx"
+        set compile_flags "additional_flags=-mvsx"
     } elseif [test_compiler_info xlc*] {
-        set compile_flags "$compile_flags additional_flags=-qasm=gcc"
+        set compile_flags "additional_flags=-qasm=gcc"
     } else {
         verbose "Could not compile with vsx support, returning 1" 2
         return 1
     }
 
-    set src [standard_temp_file vsx[pid].c]
-    set exe [standard_temp_file vsx[pid].x]
-
-    gdb_produce_source $src {
+    # Compile a test program containing VSX instructions.
+    set src {
 	int main() {
 	    double a[2] = { 1.0, 2.0 };
 	    #ifdef __MACH__
@@ -2524,13 +2679,7 @@ gdb_caching_proc skip_vsx_tests {
 	    return 0;
 	}
     }
-
-    verbose "$me:  compiling testfile $src" 2
-    set lines [gdb_compile $src $exe executable $compile_flags]
-    file delete $src
-
-    if ![string match "" $lines] then {
-        verbose "$me:  testfile compilation failed, returning 1" 2
+    if {![gdb_simple_compile $me $src executable $compile_flags]} {
         return 1
     }
 
@@ -2539,7 +2688,7 @@ gdb_caching_proc skip_vsx_tests {
     gdb_exit
     gdb_start
     gdb_reinitialize_dir $srcdir/$subdir
-    gdb_load "$exe"
+    gdb_load "$obj"
     gdb_run_cmd
     gdb_expect {
         -re ".*Illegal instruction.*${gdb_prompt} $" {
@@ -2556,12 +2705,61 @@ gdb_caching_proc skip_vsx_tests {
         }
     }
     gdb_exit
-    remote_file build delete $exe
+    remote_file build delete $obj
 
     verbose "$me:  returning $skip_vsx_tests" 2
     return $skip_vsx_tests
 }
 
+# Run a test on the target to see if it supports TSX hardware.  Return 0 if so,
+# 1 if it does not.  Based on 'check_vmx_hw_available' from the GCC testsuite.
+
+gdb_caching_proc skip_tsx_tests {
+    global srcdir subdir gdb_prompt inferior_exited_re
+
+    set me "skip_tsx_tests"
+
+    # Compile a test program.
+    set src {
+        int main() {
+            asm volatile ("xbegin .L0");
+            asm volatile ("xend");
+            asm volatile (".L0: nop");
+            return 0;
+        }
+    }
+    if {![gdb_simple_compile $me $src executable]} {
+        return 1
+    }
+
+    # No error message, compilation succeeded so now run it via gdb.
+
+    gdb_exit
+    gdb_start
+    gdb_reinitialize_dir $srcdir/$subdir
+    gdb_load "$obj"
+    gdb_run_cmd
+    gdb_expect {
+        -re ".*Illegal instruction.*${gdb_prompt} $" {
+            verbose -log "$me:  TSX hardware not detected."
+            set skip_tsx_tests 1
+        }
+        -re ".*$inferior_exited_re normally.*${gdb_prompt} $" {
+            verbose -log "$me:  TSX hardware detected."
+            set skip_tsx_tests 0
+        }
+        default {
+            warning "\n$me:  default case taken."
+            set skip_tsx_tests 1
+        }
+    }
+    gdb_exit
+    remote_file build delete $obj
+
+    verbose "$me:  returning $skip_tsx_tests" 2
+    return $skip_tsx_tests
+}
+
 # Run a test on the target to see if it supports btrace hardware.  Return 0 if so,
 # 1 if it does not.  Based on 'check_vmx_hw_available' from the GCC testsuite.
 
@@ -2574,40 +2772,75 @@ gdb_caching_proc skip_btrace_tests {
         return 1
     }
 
-    # Set up, compile, and execute a test program.
-    # Include the current process ID in the file names to prevent conflicts
-    # with invocations for multiple testsuites.
-    set src [standard_temp_file btrace[pid].c]
-    set exe [standard_temp_file btrace[pid].x]
+    # Compile a test program.
+    set src { int main() { return 0; } }
+    if {![gdb_simple_compile $me $src executable]} {
+        return 0
+    }
 
-    gdb_produce_source $src {
-	int main(void) { return 0; }
+    # No error message, compilation succeeded so now run it via gdb.
+
+    gdb_exit
+    gdb_start
+    gdb_reinitialize_dir $srcdir/$subdir
+    gdb_load $obj
+    if ![runto_main] {
+        return 1
+    }
+    # In case of an unexpected output, we return 2 as a fail value.
+    set skip_btrace_tests 2
+    gdb_test_multiple "record btrace" "check btrace support" {
+        -re "You can't do that when your target is.*\r\n$gdb_prompt $" {
+            set skip_btrace_tests 1
+        }
+        -re "Target does not support branch tracing.*\r\n$gdb_prompt $" {
+            set skip_btrace_tests 1
+        }
+        -re "Could not enable branch tracing.*\r\n$gdb_prompt $" {
+            set skip_btrace_tests 1
+        }
+        -re "^record btrace\r\n$gdb_prompt $" {
+            set skip_btrace_tests 0
+        }
     }
+    gdb_exit
+    remote_file build delete $obj
 
-    verbose "$me:  compiling testfile $src" 2
-    set compile_flags {debug nowarnings quiet}
-    set lines [gdb_compile $src $exe executable $compile_flags]
+    verbose "$me:  returning $skip_btrace_tests" 2
+    return $skip_btrace_tests
+}
 
-    if ![string match "" $lines] then {
-        verbose "$me:  testfile compilation failed, returning 1" 2
-	file delete $src
+# Run a test on the target to see if it supports btrace pt hardware.
+# Return 0 if so, 1 if it does not.  Based on 'check_vmx_hw_available'
+# from the GCC testsuite.
+
+gdb_caching_proc skip_btrace_pt_tests {
+    global srcdir subdir gdb_prompt inferior_exited_re
+
+    set me "skip_btrace_tests"
+    if { ![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"] } {
+        verbose "$me:  target does not support btrace, returning 1" 2
         return 1
     }
 
+    # Compile a test program.
+    set src { int main() { return 0; } }
+    if {![gdb_simple_compile $me $src executable]} {
+        return 0
+    }
+
     # No error message, compilation succeeded so now run it via gdb.
 
     gdb_exit
     gdb_start
     gdb_reinitialize_dir $srcdir/$subdir
-    gdb_load $exe
+    gdb_load $obj
     if ![runto_main] {
-	file delete $src
         return 1
     }
-    file delete $src
     # In case of an unexpected output, we return 2 as a fail value.
     set skip_btrace_tests 2
-    gdb_test_multiple "record btrace" "check btrace support" {
+    gdb_test_multiple "record btrace pt" "check btrace pt support" {
         -re "You can't do that when your target is.*\r\n$gdb_prompt $" {
             set skip_btrace_tests 1
         }
@@ -2617,24 +2850,100 @@ gdb_caching_proc skip_btrace_tests {
         -re "Could not enable branch tracing.*\r\n$gdb_prompt $" {
             set skip_btrace_tests 1
         }
-        -re "^record btrace\r\n$gdb_prompt $" {
+        -re "support was disabled at compile time.*\r\n$gdb_prompt $" {
+            set skip_btrace_tests 1
+        }
+        -re "^record btrace pt\r\n$gdb_prompt $" {
             set skip_btrace_tests 0
         }
     }
     gdb_exit
-    remote_file build delete $exe
+    remote_file build delete $obj
 
     verbose "$me:  returning $skip_btrace_tests" 2
     return $skip_btrace_tests
 }
 
-# Skip all the tests in the file if you are not on an hppa running
-# hpux target.
+# Run a test on the target to see if it supports Aarch64 SVE hardware.
+# Return 0 if so, 1 if it does not.  Note this causes a restart of GDB.
 
-proc skip_hp_tests {} {
-    eval set skip_hp [ expr ![isnative] || ![istarget "hppa*-*-hpux*"] ]
-    verbose "Skip hp tests is $skip_hp"
-    return $skip_hp
+gdb_caching_proc skip_aarch64_sve_tests {
+    global srcdir subdir gdb_prompt inferior_exited_re
+
+    set me "skip_aarch64_sve_tests"
+
+    if { ![is_aarch64_target]} {
+	return 1
+    }
+
+    set compile_flags "{additional_flags=-march=armv8-a+sve}"
+
+    # Compile a test program containing SVE instructions.
+    set src {
+	int main() {
+	    asm volatile ("ptrue p0.b");
+	    return 0;
+	}
+    }
+    if {![gdb_simple_compile $me $src executable $compile_flags]} {
+        return 1
+    }
+
+    # Compilation succeeded so now run it via gdb.
+    clean_restart $obj
+    gdb_run_cmd
+    gdb_expect {
+        -re ".*Illegal instruction.*${gdb_prompt} $" {
+            verbose -log "\n$me sve hardware not detected"
+            set skip_sve_tests 1
+        }
+        -re ".*$inferior_exited_re normally.*${gdb_prompt} $" {
+            verbose -log "\n$me: sve hardware detected"
+            set skip_sve_tests 0
+        }
+        default {
+          warning "\n$me: default case taken"
+            set skip_sve_tests 1
+        }
+    }
+    gdb_exit
+    remote_file build delete $obj
+
+    verbose "$me:  returning $skip_sve_tests" 2
+    return $skip_sve_tests
+}
+
+
+# A helper that compiles a test case to see if __int128 is supported.
+proc gdb_int128_helper {lang} {
+    return [gdb_can_simple_compile "i128-for-$lang" {
+	__int128 x;
+	int main() { return 0; }
+    } executable $lang]
+}
+
+# Return true if the C compiler understands the __int128 type.
+gdb_caching_proc has_int128_c {
+    return [gdb_int128_helper c]
+}
+
+# Return true if the C++ compiler understands the __int128 type.
+gdb_caching_proc has_int128_cxx {
+    return [gdb_int128_helper c++]
+}
+
+# Return true if the IFUNC feature is unsupported.
+gdb_caching_proc skip_ifunc_tests {
+    if [gdb_can_simple_compile ifunc {
+	extern void f_ ();
+	typedef void F (void);
+	F* g (void) { return &f_; }
+	void f () __attribute__ ((ifunc ("g")));
+    } object] {
+	return 0
+    } else {
+	return 1
+    }
 }
 
 # Return whether we should skip tests for showing inlined functions in
@@ -2682,7 +2991,8 @@ proc skip_hw_breakpoint_tests {} {
 	 || [istarget "x86_64-*-*"]
 	 || [istarget "ia64-*-*"] 
 	 || [istarget "arm*-*-*"]
-	 || [istarget "aarch64*-*-*"]} {
+	 || [istarget "aarch64*-*-*"]
+	 || [istarget "s390*-*-*"] } {
 	return 0
     }
 
@@ -2811,25 +3121,69 @@ proc skip_compile_feature_tests {} {
     return $result
 }
 
-# Check whether we're testing with the remote or extended-remote
-# targets.
-
-proc gdb_is_target_remote {} {
-    global gdb_prompt
+# Helper for gdb_is_target_* procs.  TARGET_NAME is the name of the target
+# we're looking for (used to build the test name).  TARGET_STACK_REGEXP
+# is a regexp that will match the output of "maint print target-stack" if
+# the target in question is currently pushed.  PROMPT_REGEXP is a regexp
+# matching the expected prompt after the command output.
 
-    set test "probe for target remote"
+proc gdb_is_target_1 { target_name target_stack_regexp prompt_regexp } {
+    set test "probe for target ${target_name}"
     gdb_test_multiple "maint print target-stack" $test {
-	-re ".*emote serial target in gdb-specific protocol.*$gdb_prompt $" {
+	-re "${target_stack_regexp}${prompt_regexp}" {
 	    pass $test
 	    return 1
 	}
-	-re "$gdb_prompt $" {
+	-re "$prompt_regexp" {
 	    pass $test
 	}
     }
     return 0
 }
 
+# Helper for gdb_is_target_remote where the expected prompt is variable.
+
+proc gdb_is_target_remote_prompt { prompt_regexp } {
+    return [gdb_is_target_1 "remote" ".*emote serial target in gdb-specific protocol.*" $prompt_regexp]
+}
+
+# Check whether we're testing with the remote or extended-remote
+# targets.
+
+proc gdb_is_target_remote { } {
+    global gdb_prompt
+
+    return [gdb_is_target_remote_prompt "$gdb_prompt $"]
+}
+
+# Check whether we're testing with the native target.
+
+proc gdb_is_target_native { } {
+    global gdb_prompt
+
+    return [gdb_is_target_1 "native" ".*native \\(Native process\\).*" "$gdb_prompt $"]
+}
+
+# Return the effective value of use_gdb_stub.
+#
+# If the use_gdb_stub global has been set (it is set when the gdb process is
+# spawned), return that.  Otherwise, return the value of the use_gdb_stub
+# property from the board file.
+#
+# This is the preferred way of checking use_gdb_stub, since it allows to check
+# the value before the gdb has been spawned and it will return the correct value
+# even when it was overriden by the test.
+
+proc use_gdb_stub {} {
+  global use_gdb_stub
+
+  if [info exists use_gdb_stub] {
+     return $use_gdb_stub
+  }
+
+  return [target_info exists use_gdb_stub]
+}
+
 # Return 1 if the current remote target is an instance of our GDBserver, 0
 # otherwise.  Return -1 if there was an error and we can't tell.
 
@@ -2837,7 +3191,7 @@ gdb_caching_proc target_is_gdbserver {
     global gdb_prompt
 
     set is_gdbserver -1
-    set test "Probing for GDBserver"
+    set test "probing for GDBserver"
 
     gdb_test_multiple "monitor help" $test {
 	-re "The following monitor commands are supported.*Quit GDBserver.*$gdb_prompt $" {
@@ -2864,8 +3218,6 @@ if [info exists compiler_info] {
 }
 
 set gcc_compiled		0
-set hp_cc_compiler		0
-set hp_aCC_compiler		0
 
 # Figure out what compiler I am using.
 # The result is cached so only the first invocation runs the compiler.
@@ -2932,8 +3284,6 @@ proc get_compiler_info {{arg ""}} {
 
     # Legacy global data symbols.
     global gcc_compiled
-    global hp_cc_compiler
-    global hp_aCC_compiler
 
     if [info exists compiler_info] {
 	# Already computed.
@@ -2954,12 +3304,12 @@ proc get_compiler_info {{arg ""}} {
 	# We have to use -E and -o together, despite the comments
 	# above, because of how DejaGnu handles remote host testing.
 	set ppout "$outdir/compiler.i"
-	gdb_compile "${ifile}" "$ppout" preprocess [list "$arg" quiet]
+	gdb_compile "${ifile}" "$ppout" preprocess [list "$arg" quiet getting_compiler_info]
 	set file [open $ppout r]
 	set cppout [read $file]
 	close $file
     } else {
-	set cppout [ gdb_compile "${ifile}" "" preprocess [list "$arg" quiet] ]
+	set cppout [ gdb_compile "${ifile}" "" preprocess [list "$arg" quiet getting_compiler_info] ]
     }
     eval log_file $saved_log
 
@@ -2993,16 +3343,8 @@ proc get_compiler_info {{arg ""}} {
     }
 
     # Set the legacy symbols.
-    set gcc_compiled     0
-    set hp_cc_compiler   0
-    set hp_aCC_compiler  0
-    if { [regexp "^gcc-1-" "$compiler_info" ] } { set gcc_compiled 1 }
-    if { [regexp "^gcc-2-" "$compiler_info" ] } { set gcc_compiled 2 }
-    if { [regexp "^gcc-3-" "$compiler_info" ] } { set gcc_compiled 3 }
-    if { [regexp "^gcc-4-" "$compiler_info" ] } { set gcc_compiled 4 }
-    if { [regexp "^gcc-5-" "$compiler_info" ] } { set gcc_compiled 5 }
-    if { [regexp "^hpcc-"  "$compiler_info" ] } { set hp_cc_compiler 1 }
-    if { [regexp "^hpacc-" "$compiler_info" ] } { set hp_aCC_compiler 1 }
+    set gcc_compiled 0
+    regexp "^gcc-(\[0-9\]+)-" "$compiler_info" matchall gcc_compiled
 
     # Log what happened.
     verbose -log "get_compiler_info: $compiler_info"
@@ -3012,13 +3354,6 @@ proc get_compiler_info {{arg ""}} {
     uplevel \#0 { set true 1 }
     uplevel \#0 { set false 0 }
 
-    # Use of aCC results in boolean results being displayed as
-    # "true" or "false"
-    if { $hp_aCC_compiler } {
-      uplevel \#0 { set true true }
-      uplevel \#0 { set false false }
-    }
-
     return 0
 }
 
@@ -3073,10 +3408,125 @@ proc gdb_wrapper_init { args } {
     set gdb_wrapper_target [current_target_name]
 }
 
+# Determine options that we always want to pass to the compiler.
+gdb_caching_proc universal_compile_options {
+    set me "universal_compile_options"
+    set options {}
+
+    set src [standard_temp_file ccopts[pid].c]
+    set obj [standard_temp_file ccopts[pid].o]
+
+    gdb_produce_source $src {
+	int foo(void) { return 0; }
+    }
+
+    # Try an option for disabling colored diagnostics.  Some compilers
+    # yield colored diagnostics by default (when run from a tty) unless
+    # such an option is specified.
+    set opt "additional_flags=-fdiagnostics-color=never"
+    set lines [target_compile $src $obj object [list "quiet" $opt]]
+    if [string match "" $lines] then {
+	# Seems to have worked; use the option.
+	lappend options $opt
+    }
+    file delete $src
+    file delete $obj
+
+    verbose "$me:  returning $options" 2
+    return $options
+}
+
+# Compile the code in $code to a file based on $name, using the flags
+# $compile_flag as well as debug, nowarning and quiet.
+# Return 1 if code can be compiled
+# Leave the file name of the resulting object in the upvar object.
+
+proc gdb_simple_compile {name code {type object} {compile_flags {}} {object obj}} {
+    upvar $object obj
+
+    switch -regexp -- $type {
+        "executable" {
+            set postfix "x"
+        }
+        "object" {
+            set postfix "o"
+        }
+        "preprocess" {
+            set postfix "i"
+        }
+        "assembly" {
+            set postfix "s"
+        }
+    }
+    set src [standard_temp_file $name-[pid].c]
+    set obj [standard_temp_file $name-[pid].$postfix]
+    set compile_flags [concat $compile_flags {debug nowarnings quiet}]
+
+    gdb_produce_source $src $code
+
+    verbose "$name:  compiling testfile $src" 2
+    set lines [gdb_compile $src $obj $type $compile_flags]
+
+    file delete $src
+
+    if ![string match "" $lines] then {
+        verbose "$name:  compilation failed, returning 0" 2
+        return 0
+    }
+    return 1
+}
+
+# Compile the code in $code to a file based on $name, using the flags
+# $compile_flag as well as debug, nowarning and quiet.
+# Return 1 if code can be compiled
+# Delete all created files and objects.
+
+proc gdb_can_simple_compile {name code {type object} {compile_flags ""}} {
+    set ret [gdb_simple_compile $name $code $type $compile_flags temp_obj]
+    file delete $temp_obj
+    return $ret
+}
+
 # Some targets need to always link a special object in.  Save its path here.
 global gdb_saved_set_unbuffered_mode_obj
 set gdb_saved_set_unbuffered_mode_obj ""
 
+# Compile source files specified by SOURCE into a binary of type TYPE at path
+# DEST.  gdb_compile is implemented using DejaGnu's target_compile, so the type
+# parameter and most options are passed directly to it.
+#
+# The type can be one of the following:
+#
+#   - object: Compile into an object file.
+#   - executable: Compile and link into an executable.
+#   - preprocess: Preprocess the source files.
+#   - assembly: Generate assembly listing.
+#
+# The following options are understood and processed by gdb_compile:
+#
+#   - shlib=so_path: Add SO_PATH to the sources, and enable some target-specific
+#     quirks to be able to use shared libraries.
+#   - shlib_load: Link with appropriate libraries to allow the test to
+#     dynamically load libraries at runtime.  For example, on Linux, this adds
+#     -ldl so that the test can use dlopen.
+#   - nowarnings:  Inhibit all compiler warnings.
+#   - pie: Force creation of PIE executables.
+#   - nopie: Prevent creation of PIE executables.
+#
+# And here are some of the not too obscure options understood by DejaGnu that
+# influence the compilation:
+#
+#   - additional_flags=flag: Add FLAG to the compiler flags.
+#   - libs=library: Add LIBRARY to the libraries passed to the linker.  The
+#     argument can be a file, in which case it's added to the sources, or a
+#     linker flag.
+#   - ldflags=flag: Add FLAG to the linker flags.
+#   - incdir=path: Add PATH to the searched include directories.
+#   - libdir=path: Add PATH to the linker searched directories.
+#   - ada, c++, f77: Compile the file as Ada, C++ or Fortran.
+#   - debug: Build with debug information.
+#   - optimize: Build with optimization.
+
 proc gdb_compile {source dest type options} {
     global GDB_TESTCASE_OPTIONS
     global gdb_wrapper_file
@@ -3090,11 +3540,18 @@ proc gdb_compile {source dest type options} {
 
     # Add platform-specific options if a shared library was specified using
     # "shlib=librarypath" in OPTIONS.
-    set new_options ""
+    set new_options {}
+    if {[lsearch -exact $options rust] != -1} {
+	# -fdiagnostics-color is not a rustcc option.
+    } else {
+	set new_options [universal_compile_options]
+    }
     set shlib_found 0
     set shlib_load 0
+    set getting_compiler_info 0
     foreach opt $options {
-        if [regexp {^shlib=(.*)} $opt dummy_var shlib_name] {
+        if {[regexp {^shlib=(.*)} $opt dummy_var shlib_name]
+	    && $type == "executable"} {
             if [test_compiler_info "xlc-*"] {
 		# IBM xlc compiler doesn't accept shared library named other
 		# than .so: use "-Wl," to bypass this
@@ -3120,23 +3577,36 @@ proc gdb_compile {source dest type options} {
 		    lappend new_options "early_flags=-Wl,--no-as-needed"
 		}
             }
-	} elseif { $opt == "shlib_load" } {
+	} elseif { $opt == "shlib_load" && $type == "executable" } {
 	    set shlib_load 1
+	} elseif { $opt == "getting_compiler_info" } {
+	    # If this is set, calling test_compiler_info will cause recursion.
+	    set getting_compiler_info 1
         } else {
             lappend new_options $opt
         }
     }
 
-    # We typically link to shared libraries using an absolute path, and
-    # that's how they are found at runtime.  If we are going to
-    # dynamically load one by basename, we must specify rpath.  If we
-    # are using a remote host, DejaGNU will link to the shared library
-    # using a relative path, so again we must specify an rpath.
-    if { $shlib_load || ($shlib_found && [is_remote target]) } {
+    # Ensure stack protector is disabled for GCC, as this causes problems with
+    # DWARF line numbering.
+    # See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88432
+    # This option defaults to on for Debian/Ubuntu.
+    if { $getting_compiler_info == 0
+	 && [test_compiler_info {gcc-*-*}]
+	 && !([test_compiler_info {gcc-[0-3]-*}]
+	      || [test_compiler_info {gcc-4-0-*}])
+	 && [lsearch -exact $options rust] == -1} {
+        # Put it at the front to not override any user-provided value.
+        lappend new_options "early_flags=-fno-stack-protector"
+    }
+
+    # Because we link with libraries using their basename, we may need
+    # (depending on the platform) to set a special rpath value, to allow
+    # the executable to find the libraries it depends on.
+    if { $shlib_load || $shlib_found } {
 	if { ([istarget "*-*-mingw*"]
 	      || [istarget *-*-cygwin*]
-	      || [istarget *-*-pe*]
-	      || [istarget hppa*-*-hpux*])} {
+	      || [istarget *-*-pe*]) } {
 	    # Do not need anything.
 	} elseif { [istarget *-*-freebsd*] || [istarget *-*-openbsd*] } {
 	    lappend new_options "ldflags=-Wl,-rpath,${outdir}"
@@ -3180,6 +3650,43 @@ proc gdb_compile {source dest type options} {
 	set options [lreplace $options $nowarnings $nowarnings $flag]
     }
 
+    # Replace the "pie" option with the appropriate compiler and linker flags
+    # to enable PIE executables.
+    set pie [lsearch -exact $options pie]
+    if {$pie != -1} {
+	if [target_info exists gdb,pie_flag] {
+	    set flag "additional_flags=[target_info gdb,pie_flag]"
+	} else {
+	    # For safety, use fPIE rather than fpie. On AArch64, m68k, PowerPC
+	    # and SPARC, fpie can cause compile errors due to the GOT exceeding
+	    # a maximum size.  On other architectures the two flags are
+	    # identical (see the GCC manual). Note Debian9 and Ubuntu16.10
+	    # onwards default GCC to using fPIE.  If you do require fpie, then
+	    # it can be set using the pie_flag.
+	    set flag "additional_flags=-fPIE"
+	}
+	set options [lreplace $options $pie $pie $flag]
+
+	if [target_info exists gdb,pie_ldflag] {
+	    set flag "ldflags=[target_info gdb,pie_ldflag]"
+	} else {
+	    set flag "ldflags=-pie"
+	}
+	lappend options "$flag"
+    }
+
+    # Replace the "nopie" option with the appropriate linker flag to disable
+    # PIE executables.  There are no compiler flags for this option.
+    set nopie [lsearch -exact $options nopie]
+    if {$nopie != -1} {
+	if [target_info exists gdb,nopie_flag] {
+	    set flag "ldflags=[target_info gdb,nopie_flag]"
+	} else {
+	    set flag "ldflags=-no-pie"
+	}
+	set options [lreplace $options $nopie $nopie $flag]
+    }
+
     if { $type == "executable" } {
 	if { ([istarget "*-*-mingw*"]
 	      || [istarget "*-*-*djgpp"]
@@ -3277,7 +3784,7 @@ proc gdb_compile_pthreads {source dest type options} {
         }
     }
     if {!$built_binfile} {
-	unsupported "Couldn't compile [file tail $source]: ${why_msg}"
+	unsupported "couldn't compile [file tail $source]: ${why_msg}"
         return -1
     }
 }
@@ -3314,15 +3821,11 @@ proc gdb_compile_shlib {sources dest options} {
                 lappend obj_options "additional_flags=-fpic"
             }
         }
+        "icc-*" {
+                lappend obj_options "additional_flags=-fpic"
+        }
         default {
-            switch -glob [istarget] {
-                "hppa*-hp-hpux*" {
-                    lappend obj_options "additional_flags=+z"
-                }
-                default {
-                    # don't know what the compiler is...
-                }
-            }
+	    # don't know what the compiler is...
         }
     }
 
@@ -3336,49 +3839,48 @@ proc gdb_compile_shlib {sources dest options} {
        lappend objects ${outdir}/${sourcebase}.o
     }
 
-    if [istarget "hppa*-*-hpux*"] {
-       remote_exec build "ld -b ${objects} -o ${dest}"
+    set link_options $options
+    if [test_compiler_info "xlc-*"] {
+	lappend link_options "additional_flags=-qmkshrobj"
     } else {
-       set link_options $options
-       if [test_compiler_info "xlc-*"] {
-          lappend link_options "additional_flags=-qmkshrobj"
-       } else {
-          lappend link_options "additional_flags=-shared"
-
-	   if { ([istarget "*-*-mingw*"]
-		 || [istarget *-*-cygwin*]
-		 || [istarget *-*-pe*]) } {
-	       if { [is_remote host] } {
-		   set name [file tail ${dest}]
-	       } else {
-		   set name ${dest}
-	       }
-	       lappend link_options "additional_flags=-Wl,--out-implib,${name}.a"
-	   } elseif [is_remote target] {
-	     # By default, we do not set the soname.  This causes the linker
-	     # on ELF systems to create a DT_NEEDED entry in the executable
-	     # refering to the full path name of the library.  This is a
-	     # problem in remote testing if the library is in a different
-	     # directory there.  To fix this, we set a soname of just the
-	     # base filename for the library, and add an appropriate -rpath
-	     # to the main executable (in gdb_compile).
-             set destbase [file tail $dest]
-             lappend link_options "additional_flags=-Wl,-soname,$destbase"
-           }
-       }
-       if {[gdb_compile "${objects}" "${dest}" executable $link_options] != ""} {
-           return -1
-       }
-	if { [is_remote host]
-	     && ([istarget "*-*-mingw*"]
-		 || [istarget *-*-cygwin*]
-		 || [istarget *-*-pe*]) } {
-	    set dest_tail_name [file tail ${dest}]
-	    remote_upload host $dest_tail_name.a ${dest}.a
-	    remote_file host delete $dest_tail_name.a
+	lappend link_options "additional_flags=-shared"
+
+	if { ([istarget "*-*-mingw*"]
+	      || [istarget *-*-cygwin*]
+	      || [istarget *-*-pe*]) } {
+	    if { [is_remote host] } {
+		set name [file tail ${dest}]
+	    } else {
+		set name ${dest}
+	    }
+	    lappend link_options "additional_flags=-Wl,--out-implib,${name}.a"
+	} else {
+	    # Set the soname of the library.  This causes the linker on ELF
+	    # systems to create the DT_NEEDED entry in the executable referring
+	    # to the soname of the library, and not its absolute path.  This
+	    # (using the absolute path) would be problem when testing on a
+	    # remote target.
+	    #
+	    # In conjunction with setting the soname, we add the special
+	    # rpath=$ORIGIN value when building the executable, so that it's
+	    # able to find the library in its own directory.
+	    set destbase [file tail $dest]
+	    lappend link_options "additional_flags=-Wl,-soname,$destbase"
 	}
     }
-  return ""
+    if {[gdb_compile "${objects}" "${dest}" executable $link_options] != ""} {
+	return -1
+    }
+    if { [is_remote host]
+	 && ([istarget "*-*-mingw*"]
+	     || [istarget *-*-cygwin*]
+	     || [istarget *-*-pe*]) } {
+	set dest_tail_name [file tail ${dest}]
+	remote_upload host $dest_tail_name.a ${dest}.a
+	remote_file host delete $dest_tail_name.a
+    }
+
+    return ""
 }
 
 # This is just like gdb_compile_shlib, above, except that it tries compiling
@@ -3411,7 +3913,7 @@ proc gdb_compile_shlib_pthreads {sources dest options} {
         }
     }
     if {!$built_binfile} {
-        unsupported "Couldn't compile $sources: ${why_msg}"
+        unsupported "couldn't compile $sources: ${why_msg}"
         return -1
     }
 }
@@ -3451,7 +3953,7 @@ proc gdb_compile_objc {source dest type options} {
         }
     }
     if {!$built_binfile} {
-        unsupported "Couldn't compile [file tail $source]: ${why_msg}"
+        unsupported "couldn't compile [file tail $source]: ${why_msg}"
         return -1
     }
 }
@@ -3952,52 +4454,73 @@ proc gdb_touch_execfile { binfile } {
     }
 }
 
-# Like remote_download but provides a gdb-specific behavior.  If DEST
-# is "host", and the host is not remote, and TOFILE is not specified,
-# then the [file tail] of FROMFILE is passed through
-# standard_output_file to compute the destination.
+# Like remote_download but provides a gdb-specific behavior.
+#
+# If the destination board is remote, the local file FROMFILE is transferred as
+# usual with remote_download to TOFILE on the remote board.  The destination
+# filename is added to the CLEANFILES global, so it can be cleaned up at the
+# end of the test.
+#
+# If the destination board is local, the destination path TOFILE is passed
+# through standard_output_file, and FROMFILE is copied there.
+#
+# In both cases, if TOFILE is omitted, it defaults to the [file tail] of
+# FROMFILE.
 
 proc gdb_remote_download {dest fromfile {tofile {}}} {
-    if {$dest == "host" && ![is_remote host] && $tofile == ""} {
-	set tofile [standard_output_file [file tail $fromfile]]
+    # If TOFILE is not given, default to the same filename as FROMFILE.
+    if {[string length $tofile] == 0} {
+	set tofile [file tail $fromfile]
     }
 
-    if { $tofile == "" } {
-	return [remote_download $dest $fromfile]
+    if {[is_remote $dest]} {
+	# When the DEST is remote, we simply send the file to DEST.
+	global cleanfiles
+
+	set destname [remote_download $dest $fromfile $tofile]
+	lappend cleanfiles $destname
+
+	return $destname
     } else {
-	return [remote_download $dest $fromfile $tofile]
-    }
-}
+	# When the DEST is local, we copy the file to the test directory (where
+	# the executable is).
+	#
+	# Note that we pass TOFILE through standard_output_file, regardless of
+	# whether it is absolute or relative, because we don't want the tests
+	# to be able to write outside their standard output directory.
 
-# gdb_download
-#
-# Copy a file to the remote target and return its target filename.
-# Schedule the file to be deleted at the end of this test.
+	set tofile [standard_output_file $tofile]
 
-proc gdb_download { filename } {
-    global cleanfiles
+	file copy -force $fromfile $tofile
 
-    set destname [remote_download target $filename]
-    lappend cleanfiles $destname
-    return $destname
+	return $tofile
+    }
 }
 
-# gdb_load_shlibs LIB...
+# gdb_load_shlib LIB...
 #
-# Copy the listed libraries to the target.
+# Copy the listed library to the target.
 
-proc gdb_load_shlibs { args } {
-    if {![is_remote target]} {
-	return
+proc gdb_load_shlib { file } {
+    global gdb_spawn_id
+
+    if ![info exists gdb_spawn_id] {
+	perror "gdb_load_shlib: GDB is not running"
     }
 
-    foreach file $args {
-	gdb_download [shlib_target_file $file]
+    set dest [gdb_remote_download target [shlib_target_file $file]]
+
+    if {[is_remote target]} {
+	# If the target is remote, we need to tell gdb where to find the
+	# libraries.
+	#
+	# We could set this even when not testing remotely, but a user
+	# generally won't set it unless necessary.  In order to make the tests
+	# more like the real-life scenarios, we don't set it for local testing.
+	gdb_test "set solib-search-path [file dirname $file]" "" ""
     }
 
-    # Even if the target supplies full paths for shared libraries,
-    # they may not be paths for this system.
-    gdb_test "set solib-search-path [file dirname [lindex $args 0]]" "" ""
+    return $dest
 }
 
 #
@@ -4086,7 +4609,7 @@ proc default_gdb_init { test_file_name } {
 proc make_gdb_parallel_path { args } {
     global GDB_PARALLEL objdir
     set joiner [list "file" "join" $objdir]
-    if { $GDB_PARALLEL != "yes" } {
+    if { [info exists GDB_PARALLEL] && $GDB_PARALLEL != "yes" } {
 	lappend joiner $GDB_PARALLEL
     }
     set joiner [concat $joiner $args]
@@ -4098,27 +4621,22 @@ proc make_gdb_parallel_path { args } {
 # the directory is returned.
 
 proc standard_output_file {basename} {
-    global objdir subdir gdb_test_file_name GDB_PARALLEL
+    global objdir subdir gdb_test_file_name
 
-    if {[info exists GDB_PARALLEL]} {
-	set dir [make_gdb_parallel_path outputs $subdir $gdb_test_file_name]
-	file mkdir $dir
-	return [file join $dir $basename]
-    } else {
-	return [file join $objdir $subdir $basename]
-    }
+    set dir [make_gdb_parallel_path outputs $subdir $gdb_test_file_name]
+    file mkdir $dir
+    return [file join $dir $basename]
 }
 
 # Return the name of a file in our standard temporary directory.
 
 proc standard_temp_file {basename} {
-    global objdir GDB_PARALLEL
-
-    if {[info exists GDB_PARALLEL]} {
-	return [make_gdb_parallel_path temp $basename]
-    } else {
-	return $basename
-    }
+    # Since a particular runtest invocation is only executing a single test
+    # file at any given time, we can use the runtest pid to build the
+    # path of the temp directory.
+    set dir [make_gdb_parallel_path temp [pid]]
+    file mkdir $dir
+    return [file join $dir $basename]
 }
 
 # Set 'testfile', 'srcfile', and 'binfile'.
@@ -4285,10 +4803,14 @@ proc gdb_init { test_file_name } {
     # read from this file.
     setenv INPUTRC "/dev/null"
 
-    # The gdb.base/readline.exp arrow key test relies on the standard VT100
-    # bindings, so make sure that an appropriate terminal is selected.
-    # The same bug doesn't show up if we use ^P / ^N instead.
-    setenv TERM "vt100"
+    # This disables style output, which would interfere with many
+    # tests.
+    setenv TERM "dumb"
+
+    # Initialize GDB's pty with a fixed size, to make sure we avoid pagination
+    # during startup.  See "man expect" for details about stty_init.
+    global stty_init
+    set stty_init "rows 25 cols 80"
 
     # Some tests (for example gdb.base/maint.exp) shell out from gdb to use
     # grep.  Clear GREP_OPTIONS to make the behavior predictable,
@@ -4580,14 +5102,102 @@ proc rerun_to_main {} {
   }
 }
 
-# Print a message and return true if a test should be skipped
-# due to lack of floating point suport.
+# Return true if a test should be skipped due to lack of floating
+# point support or GDB can't fetch the contents from floating point
+# registers.
 
-proc gdb_skip_float_test { msg } {
+gdb_caching_proc gdb_skip_float_test {
     if [target_info exists gdb,skip_float_tests] {
-	verbose "Skipping test '$msg': no float tests."
 	return 1
     }
+
+    # There is an ARM kernel ptrace bug that hardware VFP registers
+    # are not updated after GDB ptrace set VFP registers.  The bug
+    # was introduced by kernel commit 8130b9d7b9d858aa04ce67805e8951e3cb6e9b2f
+    # in 2012 and is fixed in e2dfb4b880146bfd4b6aa8e138c0205407cebbaf
+    # in May 2016.  In other words, kernels older than 4.6.3, 4.4.14,
+    # 4.1.27, 3.18.36, and 3.14.73 have this bug.
+    # This kernel bug is detected by check how does GDB change the
+    # program result by changing one VFP register.
+    if { [istarget "arm*-*-linux*"] } {
+
+	set compile_flags {debug nowarnings }
+
+	# Set up, compile, and execute a test program having VFP
+	# operations.
+	set src [standard_temp_file arm_vfp[pid].c]
+	set exe [standard_temp_file arm_vfp[pid].x]
+
+	gdb_produce_source $src {
+	    int main() {
+		double d = 4.0;
+		int ret;
+
+		asm ("vldr d0, [%0]" : : "r" (&d));
+		asm ("vldr d1, [%0]" : : "r" (&d));
+		asm (".global break_here\n"
+		     "break_here:");
+		asm ("vcmp.f64 d0, d1\n"
+		     "vmrs APSR_nzcv, fpscr\n"
+		     "bne L_value_different\n"
+		     "movs %0, #0\n"
+		     "b L_end\n"
+		     "L_value_different:\n"
+		     "movs %0, #1\n"
+		     "L_end:\n" : "=r" (ret) :);
+
+		/* Return $d0 != $d1.  */
+		return ret;
+	    }
+	}
+
+	verbose "compiling testfile $src" 2
+	set lines [gdb_compile $src $exe executable $compile_flags]
+	file delete $src
+
+	if ![string match "" $lines] then {
+	    verbose "testfile compilation failed, returning 1" 2
+	    return 0
+	}
+
+	# No error message, compilation succeeded so now run it via gdb.
+	# Run the test up to 5 times to detect whether ptrace can
+	# correctly update VFP registers or not.
+	set skip_vfp_test 0
+	for {set i 0} {$i < 5} {incr i} {
+	    global gdb_prompt srcdir subdir
+
+	    gdb_exit
+	    gdb_start
+	    gdb_reinitialize_dir $srcdir/$subdir
+	    gdb_load "$exe"
+
+	    runto_main
+	    gdb_test "break *break_here"
+	    gdb_continue_to_breakpoint "break_here"
+
+	    # Modify $d0 to a different value, so the exit code should
+	    # be 1.
+	    gdb_test "set \$d0 = 5.0"
+
+	    set test "continue to exit"
+	    gdb_test_multiple "continue" "$test" {
+		-re "exited with code 01.*$gdb_prompt $" {
+		}
+		-re "exited normally.*$gdb_prompt $" {
+		    # However, the exit code is 0.  That means something
+		    # wrong in setting VFP registers.
+		    set skip_vfp_test 1
+		    break
+		}
+	    }
+	}
+
+	gdb_exit
+	remote_file build delete $exe
+
+	return $skip_vfp_test
+    }
     return 0
 }
 
@@ -4611,9 +5221,14 @@ proc gdb_skip_bogus_test { msg } {
 # NOTE: This must be called while gdb is *not* running.
 
 gdb_caching_proc gdb_skip_xml_test {
+    global gdb_spawn_id
     global gdb_prompt
     global srcdir
 
+    if { [info exists gdb_spawn_id] } {
+        error "GDB must not be running in gdb_skip_xml_tests."
+    }
+
     set xml_file [gdb_remote_download host "${srcdir}/gdb.xml/trivial.xml"]
 
     gdb_start
@@ -4633,18 +5248,13 @@ gdb_caching_proc gdb_skip_xml_test {
 gdb_caching_proc gdb_has_argv0 {
     set result 0
 
-    # Set up, compile, and execute a test program to check whether
-    # argv[0] is available.
-    set src [standard_temp_file has_argv0[pid].c]
-    set exe [standard_temp_file has_argv0[pid].x]
-
-    gdb_produce_source $src {
+    # Compile and execute a test program to check whether argv[0] is available.
+    gdb_simple_compile has_argv0 {
 	int main (int argc, char **argv) {
 	    return 0;
 	}
-    }
+    } executable
 
-    gdb_compile $src $exe executable {debug}
 
     # Helper proc.
     proc gdb_has_argv0_1 { exe } {
@@ -4675,31 +5285,50 @@ gdb_caching_proc gdb_has_argv0 {
 	    }
 	}
 
+	set old_elements "200"
+	set test "show print elements"
+	gdb_test_multiple $test $test {
+	    -re "Limit on string chars or array elements to print is (\[^\r\n\]+)\\.\r\n$gdb_prompt $" {
+		set old_elements $expect_out(1,string)
+	    }
+	}
+	set old_repeats "200"
+	set test "show print repeats"
+	gdb_test_multiple $test $test {
+	    -re "Threshold for repeated print elements is (\[^\r\n\]+)\\.\r\n$gdb_prompt $" {
+		set old_repeats $expect_out(1,string)
+	    }
+	}
+	gdb_test_no_output "set print elements unlimited" ""
+	gdb_test_no_output "set print repeats unlimited" ""
+
+	set retval 0
 	# Check whether argc is 1.
 	gdb_test_multiple "p argc" "p argc" {
 	    -re " = 1\r\n${gdb_prompt} $" {
 
 		gdb_test_multiple "p argv\[0\]" "p argv\[0\]" {
 		    -re " = $hex \".*[file tail $exe]\"\r\n${gdb_prompt} $" {
-			return 1
+			set retval 1
 		    }
 		    -re "${gdb_prompt} $" {
-			return 0
 		    }
 		}
 	    }
 	    -re "${gdb_prompt} $" {
-		return 0
 	    }
 	}
-	return 0
+	
+	gdb_test_no_output "set print elements $old_elements" ""
+	gdb_test_no_output "set print repeats $old_repeats" ""
+
+	return $retval
     }
 
-    set result [gdb_has_argv0_1 $exe]
+    set result [gdb_has_argv0_1 $obj]
 
     gdb_exit
-    file delete $src
-    file delete $exe
+    file delete $obj
 
     if { !$result
       && ([istarget *-*-linux*]
@@ -4715,7 +5344,6 @@ gdb_caching_proc gdb_has_argv0 {
 	  || [istarget *-wince-pe] || [istarget *-*-mingw32ce*]
 	  || [istarget *-*-symbianelf*]
 	  || [istarget *-*-osf*]
-	  || [istarget *-*-hpux*]
 	  || [istarget *-*-dicos*]
 	  || [istarget *-*-nto*]
 	  || [istarget *-*-*vms*]
@@ -4975,6 +5603,16 @@ proc build_executable_from_specs {testname executable options args} {
 	    }
 	}
 	set ret [$func $sources_path "${binfile}" $options]
+    } elseif {[lsearch -exact $options rust] != -1} {
+	set sources_path {}
+	foreach {s local_options} $args {
+	    if { [regexp "^/" "$s"] } then {
+		lappend sources_path "$s"
+	    } else {
+		lappend sources_path "$srcdir/$subdir/$s"
+	    }
+	}
+	set ret [gdb_compile_rust $sources_path "${binfile}" $options]
     } else {
 	set objects {}
 	set i 0
@@ -5070,15 +5708,23 @@ proc prepare_for_testing { testname executable {sources ""} {options {debug}}} {
     return 0
 }
 
-proc get_valueof { fmt exp default } {
+# Retrieve the value of EXP in the inferior, represented in format
+# specified in FMT (using "printFMT").  DEFAULT is used as fallback if
+# print fails.  TEST is the test message to use.  It can be omitted,
+# in which case a test message is built from EXP.
+
+proc get_valueof { fmt exp default {test ""} } {
     global gdb_prompt
 
-    set test "get valueof \"${exp}\""
+    if {$test == "" } {
+	set test "get valueof \"${exp}\""
+    }
+
     set val ${default}
     gdb_test_multiple "print${fmt} ${exp}" "$test" {
-	-re "\\$\[0-9\]* = (.*)\[\r\n\]*$gdb_prompt $" {
+	-re "\\$\[0-9\]* = (\[^\r\n\]*)\[\r\n\]*$gdb_prompt $" {
 	    set val $expect_out(1,string)
-	    pass "$test ($val)"
+	    pass "$test"
 	}
 	timeout {
 	    fail "$test (timeout)"
@@ -5087,15 +5733,23 @@ proc get_valueof { fmt exp default } {
     return ${val}
 }
 
-proc get_integer_valueof { exp default } {
+# Retrieve the value of EXP in the inferior, as a signed decimal value
+# (using "print /d").  DEFAULT is used as fallback if print fails.
+# TEST is the test message to use.  It can be omitted, in which case
+# a test message is built from EXP.
+
+proc get_integer_valueof { exp default {test ""} } {
     global gdb_prompt
 
-    set test "get integer valueof \"${exp}\""
+    if {$test == ""} {
+	set test "get integer valueof \"${exp}\""
+    }
+
     set val ${default}
     gdb_test_multiple "print /d ${exp}" "$test" {
 	-re "\\$\[0-9\]* = (\[-\]*\[0-9\]*).*$gdb_prompt $" {
 	    set val $expect_out(1,string)
-	    pass "$test ($val)"
+	    pass "$test"
 	}
 	timeout {
 	    fail "$test (timeout)"
@@ -5104,25 +5758,34 @@ proc get_integer_valueof { exp default } {
     return ${val}
 }
 
-proc get_hexadecimal_valueof { exp default } {
+# Retrieve the value of EXP in the inferior, as an hexadecimal value
+# (using "print /x").  DEFAULT is used as fallback if print fails.
+# TEST is the test message to use.  It can be omitted, in which case
+# a test message is built from EXP.
+
+proc get_hexadecimal_valueof { exp default {test ""} } {
     global gdb_prompt
-    send_gdb "print /x ${exp}\n"
-    set test "get hexadecimal valueof \"${exp}\""
-    gdb_expect {
+
+    if {$test == ""} {
+	set test "get hexadecimal valueof \"${exp}\""
+    }
+
+    set val ${default}
+    gdb_test_multiple "print /x ${exp}" $test {
 	-re "\\$\[0-9\]* = (0x\[0-9a-zA-Z\]+).*$gdb_prompt $" {
 	    set val $expect_out(1,string)
 	    pass "$test"
 	}
-	timeout {
-	    set val ${default}
-	    fail "$test (timeout)"
-	}
     }
     return ${val}
 }
 
-proc get_sizeof { type default } {
-    return [get_integer_valueof "sizeof (${type})" $default]
+# Retrieve the size of TYPE in the inferior, as a decimal value.  DEFAULT
+# is used as fallback if print fails.  TEST is the test message to use.
+# It can be omitted, in which case a test message is 'sizeof (TYPE)'.
+
+proc get_sizeof { type default {test ""} } {
+    return [get_integer_valueof "sizeof (${type})" $default $test]
 }
 
 proc get_target_charset { } {
@@ -5142,6 +5805,46 @@ proc get_target_charset { } {
     return "UTF-8"
 }
 
+# Get the address of VAR.
+
+proc get_var_address { var } {
+    global gdb_prompt hex
+
+    # Match output like:
+    # $1 = (int *) 0x0
+    # $5 = (int (*)()) 0
+    # $6 = (int (*)()) 0x24 <function_bar>
+
+    gdb_test_multiple "print &${var}" "get address of ${var}" {
+	-re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $"
+	{
+	    pass "get address of ${var}"
+	    if { $expect_out(1,string) == "0" } {
+		return "0x0"
+	    } else {
+		return $expect_out(1,string)
+	    }
+	}
+    }
+    return ""
+}
+
+# Return the frame number for the currently selected frame
+proc get_current_frame_number {{test_name ""}} {
+    global gdb_prompt
+
+    if { $test_name == "" } {
+	set test_name "get current frame number"
+    }
+    set frame_num -1
+    gdb_test_multiple "frame" $test_name {
+	-re "#(\[0-9\]+) .*$gdb_prompt $" {
+	    set frame_num $expect_out(1,string)
+	}
+    }
+    return $frame_num
+}
+
 # Get the current value for remotetimeout and return it.
 proc get_remotetimeout { } {
     global gdb_prompt
@@ -5169,6 +5872,19 @@ proc set_remotetimeout { timeout } {
     }
 }
 
+# Get the target's current endianness and return it.
+proc get_endianness { } {
+    global gdb_prompt
+
+    gdb_test_multiple "show endian" "determine endianness" {
+	-re ".* (little|big) endian.*\r\n$gdb_prompt $" {
+	    # Pass silently.
+	    return $expect_out(1,string)
+	}
+    }
+    return "little"
+}
+
 # ROOT and FULL are file names.  Returns the relative path from ROOT
 # to FULL.  Note that FULL must be in a subdirectory of ROOT.
 # For example, given ROOT = /usr/bin and FULL = /usr/bin/ls, this
@@ -5314,18 +6030,141 @@ proc core_find {binfile {deletefiles {}} {arg ""}} {
     return $destcore
 }
 
-# gdb_target_symbol_prefix_flags returns a string that can be added
-# to gdb_compile options to define SYMBOL_PREFIX macro value
-# symbol_prefix_flags returns a string that can be added
-# for targets that use underscore as symbol prefix.
-# TODO: find out automatically if the target needs this.
+# gdb_target_symbol_prefix compiles a test program and then examines
+# the output from objdump to determine the prefix (such as underscore)
+# for linker symbol prefixes.
+
+gdb_caching_proc gdb_target_symbol_prefix {
+    # Compile a simple test program...
+    set src { int main() { return 0; } }
+    if {![gdb_simple_compile target_symbol_prefix $src executable]} {
+        return 0
+    }
+
+    set prefix ""
+
+    set objdump_program [gdb_find_objdump]
+    set result [catch "exec $objdump_program --syms $obj" output]
+
+    if { $result == 0 \
+	&& ![regexp -lineanchor \
+	     { ([^ a-zA-Z0-9]*)main$} $output dummy prefix] } {
+	verbose "gdb_target_symbol_prefix: Could not find main in objdump output; returning null prefix" 2
+    }
+
+    file delete $obj
+
+    return $prefix
+}
+
+# Return 1 if target supports scheduler locking, otherwise return 0.
+
+gdb_caching_proc target_supports_scheduler_locking {
+    global gdb_prompt
+
+    set me "gdb_target_supports_scheduler_locking"
+
+    set src { int main() { return 0; } }
+    if {![gdb_simple_compile $me $src executable]} {
+        return 0
+    }
+
+    clean_restart $obj
+    if ![runto_main] {
+        return 0
+    }
+
+    set supports_schedule_locking -1
+    set current_schedule_locking_mode ""
+
+    set test "reading current scheduler-locking mode"
+    gdb_test_multiple "show scheduler-locking" $test {
+	-re "Mode for locking scheduler during execution is \"(\[\^\"\]*)\".*$gdb_prompt" {
+	    set current_schedule_locking_mode $expect_out(1,string)
+	}
+	-re "$gdb_prompt $" {
+	    set supports_schedule_locking 0
+	}
+	timeout {
+	    set supports_schedule_locking 0
+	}
+    }
+
+    if { $supports_schedule_locking == -1 } {
+	set test "checking for scheduler-locking support"
+	gdb_test_multiple "set scheduler-locking $current_schedule_locking_mode" $test {
+	    -re "Target '\[^'\]+' cannot support this command\..*$gdb_prompt $" {
+		set supports_schedule_locking 0
+	    }
+	    -re "$gdb_prompt $" {
+		set supports_schedule_locking 1
+	    }
+	    timeout {
+		set supports_schedule_locking 0
+	    }
+	}
+    }
+
+    if { $supports_schedule_locking == -1 } {
+	set supports_schedule_locking 0
+    }
+
+    gdb_exit
+    remote_file build delete $obj
+    verbose "$me:  returning $supports_schedule_locking" 2
+    return $supports_schedule_locking
+}
+
+# gdb_target_symbol returns the provided symbol with the correct prefix
+# prepended.  (See gdb_target_symbol_prefix, above.)
+
+proc gdb_target_symbol { symbol } {
+  set prefix [gdb_target_symbol_prefix]
+  return "${prefix}${symbol}"
+}
+
+# gdb_target_symbol_prefix_flags_asm returns a string that can be
+# added to gdb_compile options to define the C-preprocessor macro
+# SYMBOL_PREFIX with a value that can be prepended to symbols
+# for targets which require a prefix, such as underscore.
+#
+# This version (_asm) defines the prefix without double quotes
+# surrounding the prefix.  It is used to define the macro
+# SYMBOL_PREFIX for assembly language files.  Another version, below,
+# is used for symbols in inline assembler in C/C++ files.
+# 
+# The lack of quotes in this version (_asm) makes it possible to
+# define supporting macros in the .S file.  (The version which
+# uses quotes for the prefix won't work for such files since it's
+# impossible to define a quote-stripping macro in C.)
+#
+# It's possible to use this version (_asm) for C/C++ source files too,
+# but a string is usually required in such files; providing a version
+# (no _asm) which encloses the prefix with double quotes makes it
+# somewhat easier to define the supporting macros in the test case.
+
+proc gdb_target_symbol_prefix_flags_asm {} {
+    set prefix [gdb_target_symbol_prefix]
+    if {$prefix ne ""} {
+	return "additional_flags=-DSYMBOL_PREFIX=$prefix"
+    } else {
+	return "";
+    }
+}
+
+# gdb_target_symbol_prefix_flags returns the same string as
+# gdb_target_symbol_prefix_flags_asm, above, but with the prefix
+# enclosed in double quotes if there is a prefix.
+#
+# See the comment for gdb_target_symbol_prefix_flags_asm for an
+# extended discussion.
 
 proc gdb_target_symbol_prefix_flags {} {
-    if { [istarget "i?86-*-cygwin*"] || [istarget "i?86-*-mingw*"]
-	 || [istarget "*-*-msdosdjgpp*"] || [istarget "*-*-go32*"] } {
-	return "additional_flags=-DSYMBOL_PREFIX=\"_\""
+    set prefix [gdb_target_symbol_prefix]
+    if {$prefix ne ""} {
+	return "additional_flags=-DSYMBOL_PREFIX=\"$prefix\""
     } else {
-	return ""
+	return "";
     }
 }
 
@@ -5428,14 +6267,16 @@ proc parse_args { argset } {
     # number of items expected to be passed into the procedure...
 }
 
-# Capture the output of COMMAND in a string ignoring PREFIX; return that string.
+# Capture the output of COMMAND in a string ignoring PREFIX (a regexp);
+# return that string.
+
 proc capture_command_output { command prefix } {
     global gdb_prompt
     global expect_out
 
     set output_string ""
     gdb_test_multiple "$command" "capture_command_output for $command" {
-	-re "${command}\[\r\n\]+${prefix}(.*)\[\r\n\]+$gdb_prompt $" {
+	-re "[string_to_regexp ${command}]\[\r\n\]+${prefix}(.*)\[\r\n\]+$gdb_prompt $" {
 	    set output_string $expect_out(1,string)
 	}
     }
@@ -5453,5 +6294,110 @@ proc multi_line { args } {
     return [join $args "\r\n"]
 }
 
+# Similar to the above, but while multi_line is meant to be used to
+# match GDB output, this one is meant to be used to build strings to
+# send as GDB input.
+
+proc multi_line_input { args } {
+    return [join $args "\n"]
+}
+
+# Return the version of the DejaGnu framework.
+#
+# The return value is a list containing the major, minor and patch version
+# numbers.  If the version does not contain a minor or patch number, they will
+# be set to 0.  For example:
+#
+#   1.6   -> {1 6 0}
+#   1.6.1 -> {1 6 1}
+#   2     -> {2 0 0}
+
+proc dejagnu_version { } {
+    # The frame_version variable is defined by DejaGnu, in runtest.exp.
+    global frame_version
+
+    verbose -log "DejaGnu version: $frame_version"
+    verbose -log "Expect version: [exp_version]"
+    verbose -log "Tcl version: [info tclversion]"
+
+    set dg_ver [split $frame_version .]
+
+    while { [llength $dg_ver] < 3 } {
+	lappend dg_ver 0
+    }
+
+    return $dg_ver
+}
+
+# Define user-defined command COMMAND using the COMMAND_LIST as the
+# command's definition.  The terminating "end" is added automatically.
+
+proc gdb_define_cmd {command command_list} {
+    global gdb_prompt
+
+    set input [multi_line_input {*}$command_list "end"]
+    set test "define $command"
+
+    gdb_test_multiple "define $command" $test {
+	-re "End with"  {
+	    gdb_test_multiple $input $test {
+		-re "\r\n$gdb_prompt " {
+		}
+	    }
+	}
+    }
+}
+
+# Override the 'cd' builtin with a version that ensures that the
+# log file keeps pointing at the same file.  We need this because
+# unfortunately the path to the log file is recorded using an
+# relative path name, and, we sometimes need to close/reopen the log
+# after changing the current directory.  See get_compiler_info.
+
+rename cd builtin_cd
+
+proc cd { dir } {
+
+    # Get the existing log file flags.
+    set log_file_info [log_file -info]
+
+    # Split the flags into args and file name.
+    set log_file_flags ""
+    set log_file_file ""
+    foreach arg [ split "$log_file_info" " "] {
+	if [string match "-*" $arg] {
+	    lappend log_file_flags $arg
+	} else {
+	    lappend log_file_file $arg
+	}
+    }
+
+    # If there was an existing file, ensure it is an absolute path, and then
+    # reset logging.
+    if { $log_file_file != "" } {
+	set log_file_file [file normalize $log_file_file]
+	log_file
+	log_file $log_file_flags "$log_file_file"
+    }
+
+    # Call the builtin version of cd.
+    builtin_cd $dir
+}
+
+# Return a list of all languages supported by GDB, suitable for use in
+# 'set language NAME'.  This doesn't include either the 'local' or
+# 'auto' keywords.
+proc gdb_supported_languages {} {
+    return [list c objective-c c++ d go fortran modula-2 asm pascal \
+		opencl rust minimal ada]
+}
+
+# Check if debugging is enabled for gdbserver.
+
+proc gdbserver_debug_enabled { } {
+    # Always disabled for GDB only setups.
+    return 0
+}
+
 # Always load compatibility stuff.
 load_lib future.exp