forked from Imagelibrary/binutils-gdb
4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
107 lines
3.2 KiB
Plaintext
107 lines
3.2 KiB
Plaintext
# Copyright 2017-2022 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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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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