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# Copyright 2023-2024 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/>.
# Test that the DW_TAG_entry_point is handled properly by GDB and that we can
# set breakpoints on function entry points.
load_lib dwarf.exp
# This test can only be run on targets that support DWARF-2 and use
# gas.
require dwarf2_support
standard_testfile .c -dw.S
if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
return -1
}
# Make some DWARF for the test.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
global srcfile
declare_labels int_label int2_label
get_func_info main
get_func_info bar_helper
set int_size [get_sizeof "int" 4]
set prog_line 1
set bar_line 2
set foo_line 3
set foobar_line 4
set global_I [gdb_target_symbol I]
set global_J [gdb_target_symbol J]
set global_K [gdb_target_symbol K]
cu {} {
compile_unit {
{language @DW_LANG_Fortran90}
{name dw2-entry-points.f90}
{comp_dir /tmp}
} {
int_label: base_type {
{name "int"}
{byte_size $int_size sdata}
{encoding @DW_ATE_signed}
}
subprogram {
{name prog}
{decl_file 1 data1}
{decl_line $prog_line data1}
{low_pc $main_start addr}
{high_pc "$main_start + $main_len" addr}
{external 1 flag}
{main_subprogram 1 flag}
}
subprogram {
{name bar}
{decl_file 1 data1}
{decl_line $bar_line data1}
{external 1 flag}
{low_pc $bar_helper_start addr}
{high_pc "$bar_helper_start + $bar_helper_len" addr}
} {
formal_parameter {
{name I}
{type :$int_label}
{location {addr $global_I} SPECIAL_expr}
}
formal_parameter {
{name J}
{type :$int_label}
{location {addr $global_J} SPECIAL_expr}
}
entry_point {
{name foo}
{decl_file 1 data1}
{decl_line $foo_line data1}
{low_pc foo_entry_label addr}
} {
formal_parameter {
{name J}
{type :$int_label}
{location {addr $global_J} SPECIAL_expr}
}
formal_parameter {
{name K}
{type :$int_label}
{location {addr $global_K} SPECIAL_expr}
}
}
entry_point {
{name foobar}
{decl_file 1 data1}
{decl_line $foobar_line data1}
{low_pc foobar_entry_label addr}
} {
formal_parameter {
{name J}
{type :$int_label}
{location {addr $global_J} SPECIAL_expr}
}
}
}
}
}
cu {} {
compile_unit {
{language @DW_LANG_Fortran90}
{name dw2-entry-points-2.f90}
{comp_dir /tmp}
} {
int2_label: base_type {
{name "int"}
{byte_size $int_size sdata}
{encoding @DW_ATE_signed}
}
subprogram {
{name barso}
{decl_file 1 data1}
{decl_line $bar_line data1}
{external 1 flag}
{low_pc $bar_helper_start addr}
{high_pc "$bar_helper_start + $bar_helper_len" addr}
} {
formal_parameter {
{name I}
{type :$int2_label}
{location {addr $global_I} SPECIAL_expr}
}
formal_parameter {
{name J}
{type :$int2_label}
{location {addr $global_J} SPECIAL_expr}
}
entry_point {
{name fooso}
{decl_file 1 data1}
{decl_line $foo_line data1}
{low_pc foo_entry_label addr}
} {
formal_parameter {
{name J}
{type :$int2_label}
{location {addr $global_J} SPECIAL_expr}
}
formal_parameter {
{name K}
{type :$int2_label}
{location {addr $global_K} SPECIAL_expr}
}
}
}
}
}
}
if {[prepare_for_testing "failed to prepare" ${testfile} \
[list $srcfile $asm_file] {nodebug}]} {
return -1
}
if ![runto_main] {
return -1
}
# Try whether we can set and hit breakpoints at the entry_points.
gdb_breakpoint "*foo"
gdb_breakpoint "*foobar"
# Now hit the entry_point break point and check their call-stack.
gdb_continue_to_breakpoint "foo"
gdb_test "bt" [multi_line \
"#0.*${hex} in foo \\(J=1, K=0\\).*" \
"#1.*${hex} in prog \\(\\).*" \
] "bt foo"
gdb_continue_to_breakpoint "foobar"
gdb_test "bt" [multi_line \
"#0.*${hex} in foobar \\(J=2\\).*" \
"#1.*${hex} in prog \\(\\).*" \
] "bt foobar"
# Now try whether we can also set breakpoints on entry_points from other CUs.
clean_restart ${testfile}
if ![runto_main] {
return -1
}
gdb_breakpoint "*fooso"
gdb_continue_to_breakpoint "foo_so"
# Note that because DW_TAG_entry_point is entered as a LOC_BLOCK
# symbol, exactly which symbol is shown in the stack trace depends on
# which symbol gdb happens to find first in the lookup.
gdb_test "bt" [multi_line \
"#0.*${hex} in (foo|fooso) \\(J=1, K=0\\).*" \
"#1.*${hex} in prog \\(\\).*" \
] "bt fooso"
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