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108 lines
3.3 KiB
Plaintext
108 lines
3.3 KiB
Plaintext
# Copyright 2017-2020 Free Software Foundation, Inc.
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#
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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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#
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# This test case verifies that GDB gracefully handles a shared library file
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# vanishing after being dlopen'ed. This consists of three nested function calls:
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#
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# main() -> foo() -> bar()
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#
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# where:
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# - foo exists in solib-vanish-lib1.so, which is dlopen'ed by main()
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# - bar exists in solib-vanish-lib2.so, which is dynamically linked into
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# solib-vanish-lib1.so
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#
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# Immediately after dlopen'ing solib-vanish-lib1.so, the so file is moved aside
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# by renaming. The main executable and solib-vanish-lib2.so are still
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# accessible.
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#
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# If a breakpoint is set on bar(), gdb throws an error when this breakpoint is
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# hit:
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#
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# (gdb) r
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# Starting program: /local/gdb/git/pr_16577_repro/simple/solib-vanish-main
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#
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# Breakpoint 1, BFD: reopening ./solib-vanish-lib1.so: No such file or directory
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#
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# BFD: reopening ./solib-vanish-lib1.so: No such file or directory
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#
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# (gdb)
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#
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# Notice that this does not print the current frame, i.e.:
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# bar (y=1) at solib-vanish-lib2.c:19
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# 19 return y + 1; /* break here */
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# (gdb)
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#
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# The current gdb git tip segfaults if we then try to step:
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# (gdb) n
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# Segmentation fault
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# This test verifies that:
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# 1) GDB does not segfault when stepping
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# 2) The stack frame is printed
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if { [skip_shlib_tests] } {
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return 0
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}
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# Library 2
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set lib2name "solib-vanish-lib2"
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set srcfile_lib2 ${srcdir}/${subdir}/${lib2name}.c
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set binfile_lib2 [standard_output_file ${lib2name}.so]
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set lib2_flags {debug}
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# Library 1
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set lib1name "solib-vanish-lib1"
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set srcfile_lib1 ${srcdir}/${subdir}/${lib1name}.c
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set binfile_lib1 [standard_output_file ${lib1name}.so]
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set lib1_flags [list debug shlib=${binfile_lib2}]
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# Main program
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set testfile "solib-vanish-main"
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set srcfile ${srcdir}/${subdir}/${testfile}.c
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set executable ${testfile}
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set binfile [standard_output_file ${executable}]
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set bin_flags [list debug shlib_load additional_flags=-DVANISH_LIB=\"${binfile_lib1}\"]
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if { [gdb_compile_shlib ${srcfile_lib2} ${binfile_lib2} $lib2_flags] != ""
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|| [gdb_compile_shlib ${srcfile_lib1} ${binfile_lib1} $lib1_flags] != ""
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|| [gdb_compile ${srcfile} ${binfile} executable $bin_flags] != "" } {
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untested "failed to compile"
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return -1
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}
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clean_restart $testfile
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if { ![runto_main] } {
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fail "can't run to main"
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return
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}
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delete_breakpoints
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set lib2_lineno [gdb_get_line_number "break here" ${srcfile_lib2}]
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gdb_breakpoint "${lib2name}.c:${lib2_lineno}" {allow-pending}
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# Verify that both the location and source code are displayed
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gdb_continue_to_breakpoint "bar" \
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".*${lib2name}.c:${lib2_lineno}.*break here.*"
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# This should not segfault
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gdb_test "next" \
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"" \
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"next succeeds"
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