libexpect程序在CentOS7立即与SEGV崩溃，不是吗'；不要在世纪6号发生

我们将操作系统从CentOS6升级到CentOS7，现在我们基于libexpect的程序在SEGV启动时立即崩溃

        CentOS7         CentOS6
TCL:    8.5.13          8.5.7
Expect: 5.45-12.el7     5.44.1.15-5.el6_4

我已经用这个简单的测试复制了这个问题：

$ cat Makefile
all:
    gcc main.cpp -lexpect -ltcl -lm

及

跑步就是这样

pa-pocb (master)$ strace ./a.out
execve("./a.out", ["./a.out"], [/* 62 vars */]) = 0
brk(0)                                  = 0xf39000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f98f000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
stat("/opt/intel/composer_xe_2013_sp1.3.174/compiler/lib/intel64", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/opt/intel/mic/coi/host-linux-release/lib", {st_mode=S_IFDIR|0755, st_size=50, ...}) = 0
stat("/opt/intel/composer_xe_2013_sp1.3.174/ipp/lib/intel64", {st_mode=S_IFDIR|0755, st_size=8192, ...}) = 0
stat("/opt/intel/composer_xe_2013_sp1.3.174/mkl/lib/intel64", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0

stat("/opt/intel/composer_xe_2013_sp1.3.174/tbb/lib/intel64/gcc4.4", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=35612, ...}) = 0
mmap(NULL, 35612, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fc88f986000
close(3)                                = 0
open("/lib64/libexpect.so", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\222\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=192632, ...}) = 0
mmap(NULL, 2298320, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88f53d000
mprotect(0x7fc88f569000, 2093056, PROT_NONE) = 0
mmap(0x7fc88f768000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2b000) = 0x7fc88f768000
mmap(0x7fc88f76b000, 12752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc88f76b000
close(3)                                = 0
open("/lib64/libtcl8.5.so", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P:\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0555, st_size=1229240, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f985000
mmap(NULL, 3293016, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88f219000
mprotect(0x7fc88f332000, 2093056, PROT_NONE) = 0
mmap(0x7fc88f531000, 49152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x118000) = 0x7fc88f531000
close(3)                                = 0
open("/lib64/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260T\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1141552, ...}) = 0
mmap(NULL, 3150168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88ef17000
mprotect(0x7fc88f018000, 2093056, PROT_NONE) = 0
mmap(0x7fc88f217000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x100000) = 0x7fc88f217000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2107760, ...}) = 0
mmap(NULL, 3932736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88eb56000
mprotect(0x7fc88ed0c000, 2097152, PROT_NONE) = 0
mmap(0x7fc88ef0c000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b6000) = 0x7fc88ef0c000
mmap(0x7fc88ef12000, 16960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc88ef12000
close(3)                                = 0
open("/lib64/libutil.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\17\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=14608, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f984000
mmap(NULL, 2105616, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88e953000
mprotect(0x7fc88e955000, 2093056, PROT_NONE) = 0
mmap(0x7fc88eb54000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7fc88eb54000
close(3)                                = 0
open("/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19512, ...}) = 0
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88e74f000
mprotect(0x7fc88e752000, 2093056, PROT_NONE) = 0
mmap(0x7fc88e951000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fc88e951000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f983000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f981000
arch_prctl(ARCH_SET_FS, 0x7fc88f981740) = 0
mprotect(0x7fc88ef0c000, 16384, PROT_READ) = 0
mprotect(0x7fc88e951000, 4096, PROT_READ) = 0
mprotect(0x7fc88eb54000, 4096, PROT_READ) = 0
mprotect(0x7fc88f217000, 4096, PROT_READ) = 0
mprotect(0x7fc88f531000, 20480, PROT_READ) = 0
mprotect(0x7fc88f768000, 4096, PROT_READ) = 0
mprotect(0x600000, 4096, PROT_READ)     = 0
mprotect(0x7fc88f990000, 4096, PROT_READ) = 0
munmap(0x7fc88f986000, 35612)           = 0
brk(0)                                  = 0xf39000
brk(0xf5a000)                           = 0xf5a000
brk(0)                                  = 0xf5a000
open("/dev/tty", O_RDWR)                = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(3, TIOCGWINSZ, {ws_row=62, ws_col=212, ws_xpixel=1696, ws_ypixel=930}) = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x410} ---
+++ killed by SIGSEGV +++
Segmentation fault

我正在尝试构建tcl/tk/expect的旧版本，但对于我真正不关心的东西，例如X11头文件等，我将陷入一个依赖性的兔子洞。

找到了它，根据tcl和tk 8.5.7（与CentOS6一起使用）构建了它，而现在它没有segv。（我认为没有必要降低TCL/Tk的级别，因为即使在运行时链接到默认的TCL/Tk时，它也不会崩溃。）

pa-pocb (master)$ strace ./a.out
execve("./a.out", ["./a.out"], [/* 62 vars */]) = 0
brk(0)                                  = 0xf39000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f98f000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
stat("/opt/intel/composer_xe_2013_sp1.3.174/compiler/lib/intel64", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/opt/intel/mic/coi/host-linux-release/lib", {st_mode=S_IFDIR|0755, st_size=50, ...}) = 0
stat("/opt/intel/composer_xe_2013_sp1.3.174/ipp/lib/intel64", {st_mode=S_IFDIR|0755, st_size=8192, ...}) = 0
stat("/opt/intel/composer_xe_2013_sp1.3.174/mkl/lib/intel64", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0

stat("/opt/intel/composer_xe_2013_sp1.3.174/tbb/lib/intel64/gcc4.4", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=35612, ...}) = 0
mmap(NULL, 35612, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fc88f986000
close(3)                                = 0
open("/lib64/libexpect.so", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\222\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=192632, ...}) = 0
mmap(NULL, 2298320, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88f53d000
mprotect(0x7fc88f569000, 2093056, PROT_NONE) = 0
mmap(0x7fc88f768000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2b000) = 0x7fc88f768000
mmap(0x7fc88f76b000, 12752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc88f76b000
close(3)                                = 0
open("/lib64/libtcl8.5.so", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P:\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0555, st_size=1229240, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f985000
mmap(NULL, 3293016, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88f219000
mprotect(0x7fc88f332000, 2093056, PROT_NONE) = 0
mmap(0x7fc88f531000, 49152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x118000) = 0x7fc88f531000
close(3)                                = 0
open("/lib64/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260T\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1141552, ...}) = 0
mmap(NULL, 3150168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88ef17000
mprotect(0x7fc88f018000, 2093056, PROT_NONE) = 0
mmap(0x7fc88f217000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x100000) = 0x7fc88f217000
close(3)                                = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2107760, ...}) = 0
mmap(NULL, 3932736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88eb56000
mprotect(0x7fc88ed0c000, 2097152, PROT_NONE) = 0
mmap(0x7fc88ef0c000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b6000) = 0x7fc88ef0c000
mmap(0x7fc88ef12000, 16960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fc88ef12000
close(3)                                = 0
open("/lib64/libutil.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\17\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=14608, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f984000
mmap(NULL, 2105616, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88e953000
mprotect(0x7fc88e955000, 2093056, PROT_NONE) = 0
mmap(0x7fc88eb54000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7fc88eb54000
close(3)                                = 0
open("/lib64/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19512, ...}) = 0
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fc88e74f000
mprotect(0x7fc88e752000, 2093056, PROT_NONE) = 0
mmap(0x7fc88e951000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fc88e951000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f983000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc88f981000
arch_prctl(ARCH_SET_FS, 0x7fc88f981740) = 0
mprotect(0x7fc88ef0c000, 16384, PROT_READ) = 0
mprotect(0x7fc88e951000, 4096, PROT_READ) = 0
mprotect(0x7fc88eb54000, 4096, PROT_READ) = 0
mprotect(0x7fc88f217000, 4096, PROT_READ) = 0
mprotect(0x7fc88f531000, 20480, PROT_READ) = 0
mprotect(0x7fc88f768000, 4096, PROT_READ) = 0
mprotect(0x600000, 4096, PROT_READ)     = 0
mprotect(0x7fc88f990000, 4096, PROT_READ) = 0
munmap(0x7fc88f986000, 35612)           = 0
brk(0)                                  = 0xf39000
brk(0xf5a000)                           = 0xf5a000
brk(0)                                  = 0xf5a000
open("/dev/tty", O_RDWR)                = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(3, TIOCGWINSZ, {ws_row=62, ws_col=212, ws_xpixel=1696, ws_ypixel=930}) = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x410} ---
+++ killed by SIGSEGV +++
Segmentation fault