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[Bug ld/20321] New: Segmentation fault with plugin


From: dilyan.palauzov at aegee dot org
Subject: [Bug ld/20321] New: Segmentation fault with plugin
Date: Fri, 01 Jul 2016 20:13:12 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=20321

            Bug ID: 20321
           Summary: Segmentation fault with plugin
           Product: binutils
           Version: 2.27 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: dilyan.palauzov at aegee dot org
  Target Milestone: ---

I use ld 2.26.51.20160701 ./configure'd with --enable-plugins
--with-system-zlib --with-expat --with-python --disable-tui
--with-system-readline --enable-compressed-debug-sections=all --enable-gold

When I try to compile this file, called Z.c:

int main ()
{

  ;
  return 0;
}

with  gcc -pipe -O3 -fno-fat-lto-objects -flto  -Wl,-O1,-s
-Wl,-plugin,/usr/local/lib/bfd-plugins/liblto_plugin.so Z.c
collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core
dumped
compilation terminated.

gdb -quiet -ex 'bt f' /usr/local/bin/ld core 
Reading symbols from /usr/local/bin/ld...done.
[New LWP 6862]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by
`/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.0.0/../../../../x86_64-pc-linux-gnu/bi'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000000000042811d in get_symbols (handle=0x95fda0, nsyms=1, syms=0x0,
def_ironly_exp=9) at /git/binutils-gdb/ld/plugin.c:669
669           if (syms[n].def != LDPK_UNDEF)
#0  0x000000000042811d in get_symbols (handle=0x95fda0, nsyms=1, syms=0x0,
def_ironly_exp=9) at /git/binutils-gdb/ld/plugin.c:669
        blhe = 0x1
        owner_sec = 0x7f94de66b710
        res = 32660
        input = 0x95fda0
        abfd = 0x95ee00
        n = 0
        __PRETTY_FUNCTION__ = "get_symbols"
#1  0x00000000004285ad in get_symbols_v2 (handle=0x95fda0, nsyms=1, syms=0x0)
at /git/binutils-gdb/ld/plugin.c:787
No locals.
#2  0x00007f94ddeca491 in write_resolution () at
../.././lto-plugin/lto-plugin.c:490
        info = 0x961030
        symtab = 0x961040
        syms = <optimized out>
        i = 0
        f = 0xb659c0
#3  all_symbols_read_handler () at ../.././lto-plugin/lto-plugin.c:657
        i = <optimized out>
        num_lto_args = <optimized out>
        lto_argv = 0xb669b0
        linker_output_str = 0x0
        lto_arg_ptr = 0xb669b0
        __PRETTY_FUNCTION__ = "all_symbols_read_handler"
#4  0x000000000042941f in plugin_call_all_symbols_read () at
/git/binutils-gdb/ld/plugin.c:1231
        rv = LDPS_OK
        curplug = 0x92a0c0
#5  0x0000000000418560 in lang_process () at /git/binutils-gdb/ld/ldlang.c:6850
        added = {
          head = 0x9271d0, 
          tail = 0x93cd60
        }
        files = {
          head = 0x927230, 
          tail = 0x92a2e0
        }
        inputfiles = {
          head = 0x9271d0, 
          tail = 0x95e678
        }
#6  0x000000000041ca08 in main (argc=43, argv=0x7ffe199c9838) at
/git/binutils-gdb/ld/ldmain.c:415
        emulation = 0x7ffe199ca382 "elf_x86_64"
        start_time = 0
        start_sbrk = 0x926000 ""


This is with gcc 7.0.0 20160627.

The same happens with gcc 5.4.1 20160630:

/usr/local/gcc5/bin/gcc -pipe -O3 -fno-fat-lto-objects -Wl,-O1,-s
-Wl,-plugin,/usr/local/gcc5/libexec/gcc/x86_64-unknown-linux-gnu/5.4.1/liblto_plugin.so
Z.c
collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core
dumped
compilation terminated.

gdb -quiet -ex 'bt f' /usr/local/bin/ld core 
Reading symbols from /usr/local/bin/ld...done.
[New LWP 6939]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `/usr/local/bin/ld -plugin
/usr/local/gcc5/libexec/gcc/x86_64-unknown-linux-gnu/'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000000000042811d in get_symbols (handle=0x131fd40, nsyms=1, syms=0x0,
def_ironly_exp=9) at /git/binutils-gdb/ld/plugin.c:669
669           if (syms[n].def != LDPK_UNDEF)
#0  0x000000000042811d in get_symbols (handle=0x131fd40, nsyms=1, syms=0x0,
def_ironly_exp=9) at /git/binutils-gdb/ld/plugin.c:669
        blhe = 0x1
        owner_sec = 0x7fb39c640710
        res = 32691
        input = 0x131fd40
        abfd = 0x131eda0
        n = 0
        __PRETTY_FUNCTION__ = "get_symbols"
#1  0x00000000004285ad in get_symbols_v2 (handle=0x131fd40, nsyms=1, syms=0x0)
at /git/binutils-gdb/ld/plugin.c:787
No locals.
#2  0x00007fb39be9f468 in write_resolution () at
../.././lto-plugin/lto-plugin.c:476
        info = 0x1320fd0
        symtab = 0x1320fe0
        syms = <optimized out>
        i = 0
        f = 0x14fd830
#3  all_symbols_read_handler () at ../.././lto-plugin/lto-plugin.c:643
        i = <optimized out>
        num_lto_args = <optimized out>
        lto_argv = 0x14fa0e0
        lto_arg_ptr = 0x14fa0e0
        __PRETTY_FUNCTION__ = "all_symbols_read_handler"
#4  0x000000000042941f in plugin_call_all_symbols_read () at
/git/binutils-gdb/ld/plugin.c:1231
        rv = LDPS_OK
        curplug = 0x12ea040
#5  0x0000000000418560 in lang_process () at /git/binutils-gdb/ld/ldlang.c:6850
        added = {
          head = 0x12e71d0, 
          tail = 0x12fcca0
        }
        files = {
          head = 0x12e7230, 
          tail = 0x12ea1d0
        }
        inputfiles = {
          head = 0x12e71d0, 
          tail = 0x133c458
        }
#6  0x000000000041ca08 in main (argc=41, argv=0x7ffdc66d3e08) at
/git/binutils-gdb/ld/ldmain.c:415
        emulation = 0x7ffdc66d5487 "elf_x86_64"
        start_time = 0
        start_sbrk = 0x12e6000 ""

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