https://sourceware.org/bugzilla/show_bug.cgi?id=26829
Bug ID: 26829
Summary: [readelf] wrong dir printed for .dwo file listing
Product: binutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
Consider the source files gdb/testsuite/gdb.dwarf2/fission-multi-cu*.c,
compiled like this:
...
$ clang -g -gsplit-dwarf -flto *.c
...
Using readelf on the a.out to look at the generated dwarf, we get:
...
$ ~/binutils/install/bin/readelf -w a.out 2>&1 | more
The .debug_info section contains link(s) to dwo file(s):
Name: a.out_dwo/0.dwo
Directory: /home/abuild/rpmbuild/BUILD/glibc-2.26/csu
ID: d9 0e 49 4a b8 f0 7b f3
readelf: Warning: Unable to load dwo file:
/home/abuild/rpmbuild/BUILD/glibc-2.26/csu/a.out_dw
o/0.dwo
Name: a.out_dwo/0.dwo
Directory: /home/vries/fission/fission-multi-cu
ID: 04 88 5d 18 be ef c8 0b
a.out: Found separate debug object file:
/home/vries/fission/fission-multi-cu/a.out_dwo/0.dwo
...
It seems the wrong directory was used for the first ID.
That is, the dir of one of the other CUs was used:
...
$ grep DW_AT_comp_dir.*: READELF | sed 's/:.*:/:/'
<24> DW_AT_comp_dir : /home/abuild/rpmbuild/BUILD/glibc-2.26/csu
<43> DW_AT_comp_dir : /home/abuild/rpmbuild/BUILD/glibc-2.26/csu
<bd> DW_AT_comp_dir : /home/abuild/rpmbuild/BUILD/glibc-2.26/csu
<d7> DW_AT_comp_dir : /home/vries/fission/fission-multi-cu
<107> DW_AT_comp_dir : /home/vries/fission/fission-multi-cu
<13c> DW_AT_comp_dir : /home/abuild/rpmbuild/BUILD/glibc-2.26/csu
<2f7> DW_AT_comp_dir : /home/abuild/rpmbuild/BUILD/glibc-2.26/csu
...
The skeleton CUs look fine though, with the correct DW_AT_comp_dir:
...
<0><d2>: Abbrev Number: 1 (DW_TAG_compile_unit)
<d3> DW_AT_stmt_list : 0xe9
<d7> DW_AT_comp_dir : /home/vries/fission/fission-multi-cu
<db> DW_AT_GNU_pubnames: 1
<db> DW_AT_GNU_dwo_name: a.out_dwo/0.dwo
<df> DW_AT_GNU_dwo_id : 0xbc8efbe185d8804
<e7> DW_AT_low_pc : 0x4004a0
<ef> DW_AT_high_pc : 0xf
<f3> DW_AT_GNU_addr_base: 0x0
<0><102>: Abbrev Number: 1 (DW_TAG_compile_unit)
<103> DW_AT_stmt_list : 0x13c
<107> DW_AT_comp_dir : /home/vries/fission/fission-multi-cu
<10b> DW_AT_GNU_pubnames: 1
<10b> DW_AT_GNU_dwo_name: a.out_dwo/0.dwo
<10f> DW_AT_GNU_dwo_id : 0xf37bf0b84a490ed9
<117> DW_AT_low_pc : 0x4004b0
<11f> DW_AT_high_pc : 0x14
<123> DW_AT_GNU_addr_base: 0x0
...
--
You are receiving this mail because:
You are on the CC list for the bug.
