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* [Bug symtab/30814] New: [gdb/symtab, cc-with-dwz-m] FAIL: gdb.cp/cplusfuncs.exp: info function for "operator\*("
@ 2023-08-31 10:37 vries at gcc dot gnu.org
2023-08-31 10:39 ` [Bug symtab/30814] " vries at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: vries at gcc dot gnu.org @ 2023-08-31 10:37 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=30814
Bug ID: 30814
Summary: [gdb/symtab, cc-with-dwz-m] FAIL:
gdb.cp/cplusfuncs.exp: info function for "operator\*("
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: symtab
Assignee: unassigned at sourceware dot org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
With target board unix we get:
...
(gdb) info function operator\*(^M
All functions matching regular expression "operator\*(":^M
^M
File /data/vries/gdb/src/gdb/testsuite/gdb.cp/cplusfuncs.cc:^M
72: void foo::operator*(foo&);^M
^M
Non-debugging symbols:^M
0x00007ffff7c22ae0 std::filesystem::directory_iterator::operator*()
const@plt^M
0x00007ffff7c23710 std::filesystem::__cxx11::directory_iterator::operator*()
const@plt^M
0x00007ffff7cf5f10 std::filesystem::__cxx11::directory_iterator::operator*()
const^M
0x00007ffff7cf5fa0
std::filesystem::__cxx11::recursive_directory_iterator::operator*() const^M
0x00007ffff7d0c680 std::filesystem::directory_iterator::operator*() const^M
0x00007ffff7d0c710 std::filesystem::recursive_directory_iterator::operator*()
const^M
(gdb) PASS: gdb.cp/cplusfuncs.exp: info function for "operator\*("
...
but with target board cc-with-dwz-m:
...
(gdb) PASS: gdb.cp/cplusfuncs.exp: print &hairyfunc7
info function operator\*(^M
All functions matching regular expression "operator\*(":^M
^M
File /usr/lib64/gcc/x86_64-suse-linux/7/include/stddef.h:^M
72: void foo::operator*(foo&);^M
^M
Non-debugging symbols:^M
0x00007ffff7c22ae0 std::filesystem::directory_iterator::operator*()
const@plt^M
0x00007ffff7c23710 std::filesystem::__cxx11::directory_iterator::operator*()
const@plt^M
0x00007ffff7cf5f10 std::filesystem::__cxx11::directory_iterator::operator*()
const^M
0x00007ffff7cf5fa0
std::filesystem::__cxx11::recursive_directory_iterator::operator*() const^M
0x00007ffff7d0c680 std::filesystem::directory_iterator::operator*() const^M
0x00007ffff7d0c710 std::filesystem::recursive_directory_iterator::operator*()
const^M
(gdb) FAIL: gdb.cp/cplusfuncs.exp: info function for "operator\*("
...
The problem is that the operator is listed under the wrong file name. It
should be listed under:
...
File /data/vries/gdb/src/gdb/testsuite/gdb.cp/cplusfuncs.cc:^M
...
but instead it's listed under:
...
File /usr/lib64/gcc/x86_64-suse-linux/7/include/stddef.h:^M
...
The DIE for the operator is:
...
<2><de>: Abbrev Number: 25 (DW_TAG_subprogram)
<df> DW_AT_external : 1
<df> DW_AT_name : (indirect string, offset: 0x61): operator*
<e3> DW_AT_decl_file : 2
<e4> DW_AT_decl_line : 10
<e5> DW_AT_linkage_name: (indirect string, offset: 0x54c): _ZN3foomlERS_
<e9> DW_AT_accessibility: 1 (public)
<ea> DW_AT_declaration : 1
<ea> DW_AT_object_pointer: <0xee>
<ec> DW_AT_sibling : <0xf5>
...
which is part of this CU:
...
<0><4e>: Abbrev Number: 24 (DW_TAG_partial_unit)
<4f> DW_AT_stmt_list : 0x0
...
which is part file .tmp/cplusfuncs.dwz, so the DW_AT_stmt_list 0x0 corresponds
to this file name table:
...
The File Name Table (offset 0x64):
Entry Dir Time Size Name
1 1 0 0 stddef.h
2 2 0 0 cplusfuncs.cc
3 0 0 0 elf-init.c
...
where selecting entry 2 gives us the correct filename.
What seems to be the problem is that instead, entry 2 is picked from the file
name table at 0xe9:
...
The File Name Table (offset 0x159):
Entry Dir Time Size Name
1 1 0 0 cplusfuncs.cc
2 2 0 0 stddef.h
...
which is the one corresponding to the CU that imports the PU:
...
<0><af>: Abbrev Number: 11 (DW_TAG_compile_unit)
<b5> DW_AT_name : cplusfuncs.cc
<c7> DW_AT_stmt_list : 0xe9
<1><d5>: Abbrev Number: 5 (DW_TAG_imported_unit)
<d6> DW_AT_import : <alt 0x4e>
...
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* [Bug symtab/30814] [gdb/symtab, cc-with-dwz-m] FAIL: gdb.cp/cplusfuncs.exp: info function for "operator\*("
2023-08-31 10:37 [Bug symtab/30814] New: [gdb/symtab, cc-with-dwz-m] FAIL: gdb.cp/cplusfuncs.exp: info function for "operator\*(" vries at gcc dot gnu.org
@ 2023-08-31 10:39 ` vries at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: vries at gcc dot gnu.org @ 2023-08-31 10:39 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=30814
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Looks similar to PR25771.
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2023-08-31 10:37 [Bug symtab/30814] New: [gdb/symtab, cc-with-dwz-m] FAIL: gdb.cp/cplusfuncs.exp: info function for "operator\*(" vries at gcc dot gnu.org
2023-08-31 10:39 ` [Bug symtab/30814] " vries at gcc dot gnu.org
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