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# Copyright 2013-2021 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/>.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
return 0
}
standard_testfile .c entry-values-dw.S
if {[gdb_compile ${srcdir}/${subdir}/${srcfile} ${binfile}1.o \
object {nodebug}] != ""} {
return -1
}
if {[gdb_compile [list ${binfile}1.o] \
"${binfile}1" executable {}] != ""} {
return -1
}
# Start GDB and load executable file, compute the offset of the
# instruction in bar returned from foo. It is needed in the Dwarf
# Assembler.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}1
set returned_from_foo ""
if { [istarget "arm*-*-*"] || [istarget "aarch64*-*-*"] } {
set call_insn "bl"
} elseif { [istarget "s390*-*-*"] } {
set call_insn "brasl"
} elseif { [istarget "powerpc*-*-*"] } {
set call_insn "bl"
} elseif { [istarget "mips*-*-*"] } {
# Skip the delay slot after the instruction used to make a call
# (which can be a jump or a branch) if it has one.
#
# JUMP (or BRANCH) foo
# insn1
# insn2
#
# Most MIPS instructions used to make calls have a delay slot.
# These include JAL, JALS, JALX, JALR, JALRS, BAL and BALS.
# In this case the program continues from `insn2' when `foo'
# returns. The only exception is JALRC, in which case execution
# resumes from `insn1' instead.
set call_insn {jalrc|[jb]al[sxr]*[ \t][^\r\n]+\r\n}
} else {
set call_insn "call"
}
# Calculate the offset of the instruction in bar returned from foo.
set test "disassemble bar"
gdb_test_multiple $test $test {
-re ".*$hex <\\+$decimal>:\[ \t\]+\\y$call_insn\\y\[^\r\n\]+\r\n\[ \]+$hex <\\+($decimal)>:.*$gdb_prompt $" {
set returned_from_foo $expect_out(1,string)
}
-re ".*$gdb_prompt $" {
fail $test
}
}
if { [string equal $returned_from_foo ""] } {
fail "find the call or branch instruction offset in bar"
# The following test makes no sense if the offset is unknown. We need
# to update the pattern above to match call or branch instruction for
# the target architecture.
return -1
}
gdb_exit
# Make some DWARF for the test.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
declare_labels int_label foo_label
global returned_from_foo
global srcdir subdir srcfile
set bar_result [function_range bar ${srcdir}/${subdir}/${srcfile}]
set bar_start [lindex $bar_result 0]
set bar_length [lindex $bar_result 1]
cu {} {
compile_unit {{language @DW_LANG_C}} {
int_label: base_type {
{name int}
{encoding @DW_ATE_signed}
{byte_size 4 DW_FORM_sdata}
}
foo_label: subprogram {
{decl_file 0 udata}
{MACRO_AT_func { foo }}
} {
formal_parameter {
{type :$int_label}
{name i}
{location {DW_OP_reg0} SPECIAL_expr}
}
formal_parameter {
{type :$int_label}
{name j}
{location {DW_OP_reg1} SPECIAL_expr}
}
}
subprogram {
{name bar}
{decl_file 0 udata}
{low_pc $bar_start addr}
{high_pc "$bar_start + $bar_length" addr}
{GNU_all_call_sites 1 sdata}
} {
formal_parameter {
{type :$int_label}
{name i}
}
GNU_call_site {
{low_pc "$bar_start + $returned_from_foo" addr}
{abstract_origin :$foo_label}
} {
# Faked entry values are reference to variables 'global1'
# and 'global2' and faked locations are register 0 and
# register 1.
GNU_call_site_parameter {
{location {DW_OP_reg0} SPECIAL_expr}
{GNU_call_site_value {
addr global1
deref_size 4
} SPECIAL_expr}
}
GNU_call_site_parameter {
{location {DW_OP_reg1} SPECIAL_expr}
{GNU_call_site_value {
addr global2
deref_size 4
} SPECIAL_expr}
}
}
}
}
}
}
if {[gdb_compile $asm_file ${binfile}2.o object {nodebug}] != ""} {
return -1
}
if {[gdb_compile [list ${binfile}1.o ${binfile}2.o] \
"${binfile}" executable {}] != ""} {
return -1
}
clean_restart ${testfile}
if ![runto_main] {
return -1
}
gdb_breakpoint "foo"
gdb_continue_to_breakpoint "foo"
gdb_test_no_output "set print entry-values both"
gdb_test_sequence "bt" "bt (1)" {
"\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=2, j=[-]?[0-9]+, j@entry=3\\)"
"\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
"\[\r\n\]#2 .* \.?main \\(\\)"
}
# Update global variables 'global1' and 'global2' and test that the
# entry values are updated too.
gdb_test_no_output "set var *(int *) &global1=10"
gdb_test_no_output "set var *(int *) &global2=11"
gdb_test_sequence "bt" "bt (2)" {
"\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=10, j=[-]?[0-9]+, j@entry=11\\)"
"\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
"\[\r\n\]#2 .* \.?main \\(\\)"
}
# Restart GDB and trace.
clean_restart $binfile
load_lib "trace-support.exp"
if ![runto_main] {
return -1
}
if ![gdb_target_supports_trace] {
unsupported "target does not support trace"
return -1
}
gdb_test "trace foo" "Tracepoint $decimal at .*"
# Collect arguments i and j. Collect 'global1' which is entry value
# of argument i. Don't collect 'global2' to test the entry value of
# argument j.
gdb_trace_setactions "set action for tracepoint 1" "" \
"collect i, j, (int) global1, \(\*\(void \*\*\) \(\$$spreg\)\) @ 128" "^$"
gdb_test_no_output "tstart"
gdb_breakpoint "end"
gdb_continue_to_breakpoint "end"
gdb_test_no_output "tstop"
gdb_test "tfind" "Found trace frame 0, .*" "tfind start"
# Since 'global2' is not collected, j@entry is expected to be 'unavailable'.
gdb_test "bt 1" "#0 .* foo \\(i=\[-\]?$decimal, i@entry=2, j=\[-\]?$decimal, j@entry=<unavailable>\\).*"
# Test that unavailable "j@entry" is not shown when command option
# --skip-unavailable is used.
gdb_test "interpreter-exec mi \"-stack-list-arguments --skip-unavailable --simple-values\"" \
"\r\n\\^done,stack-args=\\\[frame={level=\"0\",args=\\\[{name=\"i\",type=\"int\",value=\".*\"},{name=\"i@entry\",type=\"int\",value=\"2\"},{name=\"j\",type=\"int\",value=\".*\"}\\\]},frame=.*\\\].*"
gdb_test "tfind" "Target failed to find requested trace frame\..*"
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