Segfault on hardened Linux systems - page 2.

Cross posting into its own topic, maybe more people have more knowledge about these type of things,
but might have missed it in the gentoo ebuild topic.

Building bitcoind on hardened linux seems to cause a segfault when setting the amount of cores to
use for generating bitcoins. Starting with -gen=0 doesn't trigger the segfault.

-----
Ok, I've changed one of my systems to a hardened system and was able to reproduce the bug
on version 0.3.17. Here is the backtrace. No idea what is going wrong.

Code:

gdb bitcoind
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...
(gdb) run
Starting program: /usr/bin/bitcoind
[Thread debugging using libthread_db enabled]
bitcoin server starting
[New Thread 0xb6aa46d0 (LWP 6475)]
[New Thread 0xb6477b70 (LWP 6478)]
[New Thread 0xb5c76b70 (LWP 6479)]
[New Thread 0xb5475b70 (LWP 6480)]
[New Thread 0xb4c74b70 (LWP 6481)]
[New Thread 0xb4473b70 (LWP 6482)]
[New Thread 0xb3c57b70 (LWP 6483)]
[New Thread 0xb3456b70 (LWP 6484)]
[New Thread 0xb2c39b70 (LWP 6485)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb2c39b70 (LWP 6485)]
Detect128BitSSE2 () at main.cpp:2956
2956 main.cpp: No such file or directory.
in main.cpp
(gdb) bt full
#0 Detect128BitSSE2 () at main.cpp:2956
fUseSSE2 =
fPrinted = false
nFamily = 15
nModel = 2
#1 0xb768fdfc in BitcoinMiner () at main.cpp:3313
reservekey = {nIndex = 0, vchPubKey = { >> = {
_M_impl = {> = {<__gnu_cxx::new_allocator> = {}, }, _M_start = 0x0,
_M_finish = 0x0, _M_end_of_storage = 0x0}}, }}
nExtraNonce =
nPrevTime =
__PRETTY_FUNCTION__ = "void BitcoinMiner()"
#2 0xb7690e32 in ThreadBitcoinMiner (parg=0x0) at main.cpp:2884
No locals.
#3 0xb6acd96e in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#4 0xb6baeb5e in clone () from /lib/libc.so.6
No symbol table info available.

The misbehaving line is:

Code:

if (!fPrinted)

in the following code:

Code:

// AMD reports a lower model number in 64-bit mode
if (fAMD && sizeof(void*) > 4 && nFamily * 10000 + nModel >= 160000)
fUseSSE2 = true;

static bool fPrinted;
if (!fPrinted)
{
fPrinted = true;
printf("CPUID %08x family %d, model %d, stepping %d, fUseSSE2=%d\n", nBrand, nFamily, nModel, cpu.nStepping, fUseSSE2);
}
return fUseSSE2;

fPrinted is false according to the backtrace, I don't know why this is causing the segfault?

Topic: Segfault on hardened Linux systems - page 2. (Read 3819 times)