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ba6a0ef349
The current mechanism by which the Python gdb.current_objfile is maintained does not allow for nested auto-load events. It is assumed that once an auto-load script has finished loading then the current objfile should be set back to NULL. In a nested situation, we should be restoring the previous value. We already have an RAII class to handle save/restore type behaviour, so lets just switch to use that. The test is a little contrived, but is simple enough, and triggers the bug. The real use case might involve the auto-load script calling functions (either in the just-loaded object file, or in the main executable), which in turn trigger further auto-loads to occur. gdb/ChangeLog: * python/python.c (gdbpy_source_objfile_script): Use make_scoped_restore to restore gdbpy_current_objfile. (gdbpy_execute_objfile_script): Likewise. gdb/testsuite/ChangeLog: * gdb.python/py-auto-load-chaining-f1.c: New file. * gdb.python/py-auto-load-chaining-f1.o-gdb.py: New file. * gdb.python/py-auto-load-chaining-f2.c: New file. * gdb.python/py-auto-load-chaining-f2.o-gdb.py: New file. * gdb.python/py-auto-load-chaining.c: New file. * gdb.python/py-auto-load-chaining.exp: New file.
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2021 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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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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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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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <stdio.h>
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/* These will hold the addresses for two memory regions. */
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void *region_1;
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void *region_2;
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/* Allocate a page of memory using mmap, and return a pointer. */
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void *
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allocate_page (void)
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{
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void *addr;
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int pgsize = sysconf(_SC_PAGE_SIZE);
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addr = mmap (NULL, pgsize, PROT_EXEC | PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (addr == MAP_FAILED)
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perror ("mmap");
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}
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/* Only called so we can create a breakpoint. */
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void
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breakpt (void)
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{
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/* Nothing. */
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}
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/* The test. */
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int
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main (void)
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{
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region_1 = allocate_page ();
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region_2 = allocate_page ();
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breakpt (); /* Break Here. */
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}
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