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85 lines
3.1 KiB
Plaintext
85 lines
3.1 KiB
Plaintext
# Copyright 2016-2018 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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# The purpose of this testcase is to verify that, when using a breakpoint
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# location of the form "*<EXPR>" (Eg: "*main"), GDB is able to start
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# the program and stop at the correct location. With programs built
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# as PIE, this means that GDB needs to re-evaluate the location once
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# the program as started, since PIE ensures that the address of all
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# symbols have changed after load.
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#
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# PIE is not always supported by the target system, so instead of
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# creating a testcase building executables with PIE, this testcase
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# takes a slightly different approach. It builds a first program,
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# breaks on *main, and then runs to that breakpoint. It then builds
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# a second program, different from the first one, and loads that
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# executable within the same GDB session. Similarly to the PIE case,
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# the address of main should be different, and therefore GDB should
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# recalculate it. We verify that by checking that running to that
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# breakpoint still works, and that we land at the first instruction
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# of that function in both cases.
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set testfile1 "break-fun-addr1"
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set srcfile1 ${testfile1}.c
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set binfile1 [standard_output_file ${testfile1}]
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile1}" "${binfile1}" executable {debug}] != "" } {
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untested "failed to compile first testcase"
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return -1
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}
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# Start the debugger with the first executable, put a breakpoint
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# on the first instruction of function "main" ("*main"), then
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# run to that breakpoint.
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clean_restart ${binfile1}
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with_test_prefix "${testfile1}" {
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gdb_test "break *main" \
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"Breakpoint.*at.* file .*$srcfile1, line .*" \
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gdb_run_cmd
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gdb_test "" \
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"Breakpoint.* main \\(\\) at .*$srcfile1:.*" \
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"run to breakpoint at *main"
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# Verify also that we stopped at the start of the function...
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gdb_test "p \$pc == main" " = 1"
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}
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set testfile2 "break-fun-addr2"
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set srcfile2 ${testfile2}.c
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set binfile2 [standard_output_file ${testfile2}]
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile2}" "${binfile2}" executable {debug}] != "" } {
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untested "failed to compile second testcase"
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return -1
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}
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# Now, keeping the same GDB process (so as to keep the same breakpoint),
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# start a new debugging session with a different executable.
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gdb_load ${binfile2}
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with_test_prefix "${testfile2}" {
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gdb_run_cmd
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gdb_test "" \
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"Breakpoint.* main \\(\\) at .*$srcfile2:.*" \
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"run to breakpoint at *main"
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gdb_test "p \$pc == main" " = 1"
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}
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