2018-02-11 22:17 GMT+01:00 Paul Floyd <[email protected]>:
>
>
>> On 11 Feb 2018, at 21:36, John Reiser <[email protected]> wrote:
>>
>>> --18142-- WARNING: Serious error when reading debug info
>>> --18142-- When reading debug info from
>>> /export/home/paulf/tools/gcc/lib/libstdc++.so.6.0.25:
>>> --18142-- Can't make sense of .rodata section mapping
>>> (GCC SVN head, Solaris 11.3, Valgrind git head).
>>
>> What does
>> readelf --headers .../libstdc++.so.6.0.25
>> say about the ElfXX_Shdrs and ElfXX_Phdrs,
>> and the mapping of the Shdrs into the Phdrs?
I don't have libstdc++.so.6.0.25.
I have stock libstdc++.so.6.0.21 which is installed with Solaris 11.3
SRU 28 (currently the latest).
readelf --headers /usr/lib/64/libstdc++.so.6.0.21 returns:
ELF Header:
Magic: 7f 45 4c 46 02 01 01 06 01 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - Solaris
ABI Version: 1
Type: DYN (Shared object file)
Machine: Advanced Micro Devices X86-64
Version: 0x1
Entry point address: 0x0
Start of program headers: 64 (bytes into file)
Start of section headers: 11713976 (bytes into file)
Flags: 0x0
Size of this header: 64 (bytes)
Size of program headers: 56 (bytes)
Number of program headers: 5
Size of section headers: 64 (bytes)
Number of section headers: 2148
Section header string table index: 2146
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .dynamic DYNAMIC 0000000000000158 00000158
0000000000000370 0000000000000010 A 8 0 8
[ 2] .eh_frame_hdr X86_64_UNWIND 00000000000004c8 000004c8
0000000000007f44 0000000000000000 A 0 0 8
[ 3] .eh_frame X86_64_UNWIND 0000000000008410 00008410
0000000000023b5c 0000000000000000 A 0 0 8
[ 4] .SUNW_syminfo VERDEF 000000000002bf70 0002bf70
000000000000541c 0000000000000004 AI 7 1 8
[ 5] .hash HASH 0000000000031390 00031390
000000000000a838 0000000000000004 A 7 0 8
[ 6] .SUNW_ldynsym LOOS+ffffff3 000000000003bbc8 0003bbc8
0000000000005868 0000000000000018 A 8 943 8
[ 7] .dynsym DYNSYM 0000000000041430 00041430
000000000001f8a8 0000000000000018 A 8 2 8
[ 8] .dynstr STRTAB 0000000000060cd8 00060cd8
000000000004b69a 0000000000000000 AS 0 0 1
[ 9] .SUNW_version VERNEED 00000000000ac378 000ac378
0000000000000100 0000000000000001 A 8 4 8
[10] .SUNW_version VERDEF 00000000000ac478 000ac478
00000000000004c4 0000000000000001 A 8 35 8
[11] .SUNW_versym VERSYM 00000000000ac940 000ac940
0000000000002a0e 0000000000000002 A 7 0 8
[12] .SUNW_dynsymsort LOOS+ffffff1 00000000000af350 000af350
0000000000005ddc 0000000000000004 A 6 0 8
[13] .SUNW_dyntlssort LOOS+ffffff2 00000000000b5130 000b5130
0000000000000008 0000000000000004 A 6 0 8
[14] .SUNW_reloc RELA 00000000000b5138 000b5138
0000000000017160 0000000000000018 A 7 0 8
[15] .rela.plt RELA 00000000000cc298 000cc298
0000000000004c98 0000000000000018 AI 7 1916 8
[16] .gcc_except_table PROGBITS 00000000000d0f30 000d0f30
0000000000007232 0000000000000000 A 0 0 4
[17] .rodata.str1.1 PROGBITS 00000000000d8162 000d8162
0000000000000ce2 0000000000000001 AMS 0 0 1
[18] .rodata._ZTSSt10l PROGBITS 00000000000d8e48 000d8e48
000000000000000f 0000000000000000 A 0 0 8
[19] .rodata._ZTSSt14e PROGBITS 00000000000d8e60 000d8e60
0000000000000013 0000000000000000 A 0 0 16
[...and much more .rodata_* sections, up to...]
[2147] .SUNW_signature GNU_HASH 0000000000000000 00b2bc1e
0000000000000198 0000000000000000 E 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), l (large)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x00000000001a6f65 0x00000000001a6f65 R E 100000
LOAD 0x00000000001a7000 0x00000000002a7000 0x0000000000000000
0x000000000000bd78 0x000000000000f850 RW 100000
DYNAMIC 0x0000000000000158 0x0000000000000158 0x0000000000000000
0x0000000000000370 0x0000000000000000 RW 0
TLS 0x00000000001b2d78 0x00000000002b2d78 0x0000000000000000
0x0000000000000000 0x0000000000000020 RW 8
LOOS+464e550 0x00000000000004c8 0x00000000000004c8 0x0000000000000000
0x0000000000007c14 0x0000000000007c14 R 8
Section to Segment mapping:
Segment Sections...
00 .dynamic .eh_frame_hdr .eh_frame .SUNW_syminfo .hash
.SUNW_ldynsym .dynsym .dynstr .SUNW_version .SUNW_version .SUNW_versym
.SUNW_dynsymsort .SUNW_dyntlssort .SUNW_reloc .rela.plt
.gcc_except_table .rodata.str1.1 .rodata._ZTSSt10lock_error
.rodata._ZTSSt14error_category
.rodata._ZTSNSt12_GLOBAL__N_122generic_error_categoryE
.rodata._ZTSNSt12_GLOBAL__N_121system_error_categoryE
.rodata._ZNSt6chrono12system_clock12is_monotonicE
.rodata._ZTSNSt13__future_base11_State_baseE
.rodata._ZTSNSt13__future_base19_Async_state_commonE
.rodata._ZNSt6chrono12system_clock9is_steadyE
.rodata._ZTSN10__cxxabiv117__array_type_infoE ... [much more entries]
01 .got .fini_array .init_array .data .jcr .tm_clone_table
.data._ZL16__gthread_active
.data.rel.ro._ZTINSt12_GLOBAL__N_122generic_error_categoryE
.data.rel.ro._ZTINSt12_
GLOBAL__N_121system_error_categoryE
.data.rel.ro._ZTVNSt12_GLOBAL__N_122generic_error_categoryE
.data.rel.ro._ZTVNSt12_GLOBAL__N_121system_error_categoryE
.data._ZZL18__gthread_
active_pvE22__gthread_active_mutex
.data._ZZN12_GLOBAL__N_116get_atomic_mutexEvE12atomic_mutex
.data.rel._ZN10__cxxabiv119__terminate_handlerE
.data.rel._ZN10__cxxabiv120__unexp
ected_handlerE .data.rel.ro.local
.data.rel.ro._ZNSt6locale17_S_twinned_facetsE
.data.rel.ro._ZNSt6locale5_Impl19_S_facet_categoriesE
.data.rel.ro._ZNSt6locale5_Impl14_S_id_mess
agesE .data.rel.ro._ZNSt6locale5_Impl14_S_id_monetaryE
.data.rel.ro._ZNSt6locale5_Impl10_S_id_timeE
.data.rel.ro._ZNSt6locale5_Impl13_S_id_collateE
.data.rel.ro._ZNSt6locale5_Im
pl13_S_id_numericE .data.rel.ro._ZNSt6locale5_Impl11_S_id_ctypeE
.data.rel.local._ZNSt10__num_base12_S_atoms_outE
.data.rel.local._ZNSt10__num_base11_S_atoms_inE .data.rel.local
._ZNSt10money_base8_S_atomsE
.data.rel.local._ZNSt17__timepunct_cacheIwE12_S_timezonesE
.data.rel.local._ZNSt17__timepunct_cacheIcE12_S_timezonesE
.data.rel.ro.local._ZNSt6local
e13_S_categoriesE .data.rel.ro.local._ZN9__gnu_cxxL14category_namesE
.data.rel.ro.local._ZZNK11__gnu_debug16_Error_formatter10_Parameter14_M_print_fieldEPKS0_PKcE13__state_names
.data.rel.ro.local._ZZNK11__gnu_debug16_Error_formatter10_Parameter14_M_print_fieldEPKS0_PKcE17__constness_names
.data.rel.local._ZN11__gnu_debug17_S_debug_messagesE .data.rel.
local._ZZN12_GLOBAL__N_126__future_category_instanceEvE5__fec ....
[much more entries]
02
03 .tbss._ZZN12_GLOBAL__N_110get_globalEvE6global
.tbss._ZSt11__once_call .tbss._ZSt15__once_callable
04
Valgrind version valgrind-3.14.0.GIT-5a705cfa90-20180118 on Solaris
11.3 x86 has no problem reading debug info from this libstdc++.so.
There is also native Solaris utility called "elfdump".
You can invoke 'elfdump -p -c -s' on libstdc++.so.6.0.21 and
libstdc++.so.6.0.25 and compare for significant differences.
I.
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