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* [binutils-gdb] [gdb/symtab] Find filename in shared psymtab
@ 2020-04-22 6:24 Tom de Vries
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From: Tom de Vries @ 2020-04-22 6:24 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=eea9e35758138f83e8c44e0e5a5e47e351f8f31a
commit eea9e35758138f83e8c44e0e5a5e47e351f8f31a
Author: Tom de Vries <tdevries@suse.de>
Date: Wed Apr 22 08:24:11 2020 +0200
[gdb/symtab] Find filename in shared psymtab
When running test-case gdb.ada/dgopt.exp with target board
unix/-flto/-O0/-flto-partition=none/-ffat-lto-objects and gcc-8, gcc-9 or
gcc-10, and the fix for PR25700, we run into this regression:
...
(gdb) list x.adb:16, 16^M
No source file named x.adb.^M
(gdb) FAIL: gdb.ada/dgopt.exp: list x.adb:16, 16
...
The reason for the failure is that without the fix for PR25700, we
have an unshared psymtab:
...
{ psymtab gdb.ada/dgopt/x.adb ((struct partial_symtab *) $hex)^M
readin no^M
fullname (null)^M
text addresses 0x0 -- 0x0^M
psymtabs_addrmap_supported yes^M
globals (none)^M
statics (none)^M
dependencies (none)^M
}^M
...
and a shared psymtab (with user field set):
...
{ psymtab gdb.ada/dgopt/x.adb ((struct partial_symtab *) $hex)^M
readin no^M
fullname (null)^M
text addresses 0x0 -- 0x0^M
psymtabs_addrmap_supported yes^M
globals (none)^M
statics (none)^M
user <artificial>@0x159a ((struct partial_symtab *) 0x37b57c0)^M
dependencies (none)^M
}^M
...
The fix for PR25700 removes the unshared psymtab.
Then when trying to find a psymtab matching x.adb in
psym_map_symtabs_matching_filename, we run into this continue for the shared
psymtab:
...
for (partial_symtab *pst : require_partial_symbols (objfile, true))
{
/* We can skip shared psymtabs here, because any file name will be
attached to the unshared psymtab. */
if (pst->user != NULL)
continue;
...
and consequently cannot find the file.
Fix this by not skipping the shared symtab in
psym_map_symtabs_matching_filename.
Build and reg-tested on x86_64-linux.
gdb/ChangeLog:
2020-04-22 Tom de Vries <tdevries@suse.de>
PR symtab/25801
* psymtab.c (psym_map_symtabs_matching_filename): Don't skip shared
symtabs.
gdb/testsuite/ChangeLog:
2020-04-22 Tom de Vries <tdevries@suse.de>
PR symtab/25801
* gdb.dwarf2/imported-unit.exp: Test that we can get imported_unit.c
in "info source" output.
Diff:
---
gdb/ChangeLog | 6 ++++++
gdb/psymtab.c | 8 +++-----
gdb/testsuite/ChangeLog | 6 ++++++
gdb/testsuite/gdb.dwarf2/imported-unit.exp | 6 ++++++
4 files changed, 21 insertions(+), 5 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 3f1cce59e7d..fdafdb99db4 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-04-22 Tom de Vries <tdevries@suse.de>
+
+ PR symtab/25801
+ * psymtab.c (psym_map_symtabs_matching_filename): Don't skip shared
+ symtabs.
+
2020-04-22 Tom de Vries <tdevries@suse.de>
PR symtab/25700
diff --git a/gdb/psymtab.c b/gdb/psymtab.c
index b156aa0e228..376cbeedcdf 100644
--- a/gdb/psymtab.c
+++ b/gdb/psymtab.c
@@ -157,17 +157,15 @@ psym_map_symtabs_matching_filename
for (partial_symtab *pst : require_partial_symbols (objfile, true))
{
- /* We can skip shared psymtabs here, because any file name will be
- attached to the unshared psymtab. */
- if (pst->user != NULL)
- continue;
-
/* Anonymous psymtabs don't have a file name. */
if (pst->anonymous)
continue;
if (compare_filenames_for_search (pst->filename, name))
{
+ while (pst->user)
+ pst = pst->user;
+
if (partial_map_expand_apply (objfile, name, real_path,
pst, callback))
return true;
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index f6c52c8e425..1331fe5248b 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2020-04-22 Tom de Vries <tdevries@suse.de>
+
+ PR symtab/25801
+ * gdb.dwarf2/imported-unit.exp: Test that we can get imported_unit.c
+ in "info source" output.
+
2020-04-22 Tom de Vries <tdevries@suse.de>
PR symtab/25700
diff --git a/gdb/testsuite/gdb.dwarf2/imported-unit.exp b/gdb/testsuite/gdb.dwarf2/imported-unit.exp
index d7b3d4c5398..32a9abf6204 100644
--- a/gdb/testsuite/gdb.dwarf2/imported-unit.exp
+++ b/gdb/testsuite/gdb.dwarf2/imported-unit.exp
@@ -186,6 +186,12 @@ if { $psymtabs_p } {
unsupported $test
}
+gdb_test "l imported_unit.c:1" \
+ "1\timported_unit.c: No such file or directory\."
+
+gdb_test "info source" "\r\nCurrent source file is imported_unit.c\r\n.*" \
+ "info source for imported_unit.c"
+
# Sanity check
gdb_test "ptype main" "= int \\(void\\)"
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