derek.holloway
7502bf64a4
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91 lines
2.3 KiB
Plaintext
91 lines
2.3 KiB
Plaintext
# Copyright 2026 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test GDB against an FDE in the .debug_frame section that doesn't set a rule
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# for the CFA.
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load_lib dwarf.exp
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require dwarf2_support is_x86_64_m64_target
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standard_testfile main.c -dw.S
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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get_func_info main
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cu { version 5 } {
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compile_unit {
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{name debug-frame-no-cfa.c}
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{comp_dir /tmp}
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} {
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declare_labels int_type_label
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int_type_label: base_type {
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{name int}
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{encoding @DW_ATE_signed}
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{byte_size 4 DW_FORM_sdata}
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}
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subprogram {
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{MACRO_AT_func { main }}
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{DW_AT_frame_base {
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DW_OP_call_frame_cfa
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} SPECIAL_expr}
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} {
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DW_TAG_variable {
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{name x}
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{type :$int_type_label}
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{location {
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DW_OP_fbreg 0
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} SPECIAL_expr}
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}
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}
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}
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}
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frame {
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declare_labels cie_label
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cie_label: CIE {
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return_address_register 16
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} {}
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FDE $cie_label $main_start $main_len {} {
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}
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}
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}
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if { [prepare_for_testing "failed to prepare" ${testfile} \
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[list $srcfile $asm_file] {nodebug}] } {
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return
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}
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if { ![runto_main] } {
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return
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}
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# This would cause an internal error in dwarf2_frame_cache.
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#
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# Make sure to match a single line, so that the test fails if an error
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# about stack unwind is printed after frame 0.
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gdb_test "backtrace" "^#0 \[^\r\n\]* main \[^\r\n\]*"
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# Translating the location of "x" to an agent expression requires
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# evaluating its frame base, which uses DW_OP_call_frame_cfa. This would
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# cause an internal error in dwarf2_fetch_cfa_info.
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gdb_test "maint agent x" \
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"Could not compute CFA; needed to translate this expression"
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