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Look for separate debug files in debug directories under a sysroot.

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When an object file is present in a system root, GDB currently looks
for separate debug files under the global debugfile directories.  For
example, if the sysroot is set to "/myroot" and hte global debugfile
directory is set to "/usr/lib/debug", GDB will look for a separate
debug file for "/myroot/lib/libc.so.7" in the following paths:

  /myroot/lib/libc.so.7.debug
  /myroot/lib/.debug/libc.so.7.debug
  /usr/lib/debug//myroot/lib/libc.so.7.debug
  /usr/lib/debug/lib/libc.so.7.debug

However, some system roots include a full system installation
including a nested global debugfile directory under the sysroot.  This
patch adds an additional check to support such systems.  In the
example above the additional path searched is:

  /myroot/usr/lib/debug/lib/libc.so.7.debug

To try to preserve existing behavior as much as possible, this new
path is searched last for each global debugfile directory.

gdb/ChangeLog:

	* symfile.c (find_separate_debug_file): Look for separate debug
	files in debug directories under the sysroot.
This commit is contained in:
John Baldwin 2019-02-12 13:56:16 -08:00
parent 1ed9f74e85
commit 402d2bfec4
2 changed files with 20 additions and 2 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2019-02-12 John Baldwin <jhb@FreeBSD.org>
* symfile.c (find_separate_debug_file): Look for separate debug
files in debug directories under the sysroot.
2019-02-12 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* symtab.h (struct minimal_symbol data_p): New const method.

17
gdb/symfile.c
View File

@ -1452,22 +1452,35 @@ find_separate_debug_file (const char *dir,
if (separate_debug_file_exists (debugfile, crc32, objfile))
return debugfile;
/* If the file is in the sysroot, try using its base path in the
global debugfile directory. */
if (canon_dir != NULL
&& filename_ncmp (canon_dir, gdb_sysroot,
strlen (gdb_sysroot)) == 0
&& IS_DIR_SEPARATOR (canon_dir[strlen (gdb_sysroot)]))
{
/* If the file is in the sysroot, try using its base path in
the global debugfile directory. */
debugfile = target_prefix ? "target:" : "";
debugfile += debugdir.get ();
debugfile += (canon_dir + strlen (gdb_sysroot));
debugfile += "/";
debugfile += debuglink;
if (separate_debug_file_exists (debugfile, crc32, objfile))
return debugfile;
/* If the file is in the sysroot, try using its base path in
the sysroot's global debugfile directory. */
debugfile = target_prefix ? "target:" : "";
debugfile += gdb_sysroot;
debugfile += debugdir.get ();
debugfile += (canon_dir + strlen (gdb_sysroot));
debugfile += "/";
debugfile += debuglink;
if (separate_debug_file_exists (debugfile, crc32, objfile))
return debugfile;
}
}
return std::string ();