Hey suckless,
I think I found a bug in 9base rc.
To replicate, execute following code:
#!/usr/bin/env rc
fn sigint{
echo in sigint
exit 1
}
l=`{read}
and send sigint to the program (for example
by typing CTRL-C.
The desired output would be 'in sigint', but instead,
by shell tells me this:
^C7974: signal: interrupt
fish: './rcbt' terminated by signal SIGSEGV (Adressbereichsfehler)
When examining the core with gdb, this is the output:
gdb /usr/local/plan9/bin/rc core.7973
Reading symbols from /usr/local/plan9/bin/rc...done.
[New LWP 7973]
Core was generated by `rc ./rcbt'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000404369 in p9main (argc=2, argv=0x7ffcd7275338) at
exec.c:188
188 (*runq->code[runq->pc-1].f)();
`bt` results this:
#0 0x0000000000404369 in p9main (argc=2, argv=0x7ffcd7275338) at
exec.c:188
#1 0x0000000000410dd1 in main ()
`info locals` results this:
Reading symbols from /usr/local/plan9/bin/rc...done.
[New LWP 7973]
Core was generated by `rc ./rcbt'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000000404369 in p9main (argc=2, argv=0x7ffcd7275338) at
exec.c:188
188 (*runq->code[runq->pc-1].f)();
bootstrap = {[0] = {
f = 0x2,
i = 2,
s = 0x2 <error: Cannot access memory at address 0x2>
}, [1] = {
f = 0x404786 <Xmark>,
i = 4212614,
s = 0x404786 <Xmark>
"UH\211\345\350(\366\377\377\220]\303UH\211\345\350b\366\377\377\220]\303UH\211\345H\203\354\020H\213\005\243\312-"
}, [2] = {
f = 0x404b1f <Xword>,
i = 4213535,
s = 0x404b1f <Xword> "UH\211\345H\213\005&\307-"
}, [3] = {
f = 0x4ab88e,
i = 4896910,
s = 0x4ab88e "*"
}, [4] = {
f = 0x405078 <Xassign>,
i = 4214904,
s = 0x405078 <Xassign> "UH\211\345H\203\354\020H\213\005\311\301-"
}, [5] = {
f = 0x404786 <Xmark>,
i = 4212614,
s = 0x404786 <Xmark>
"UH\211\345\350(\366\377\377\220]\303UH\211\345\350b\366\377\377\220]\303UH\211\345H\203\354\020H\213\005\243\312-"
}, [6] = {
f = 0x404786 <Xmark>,
i = 4212614,
s = 0x404786 <Xmark>
"UH\211\345\350(\366\377\377\220]\303UH\211\345\350b\366\377\377\220]\303UH\211\345H\203\354\020H\213\005\243\312-"
}, [7] = {
f = 0x404b1f <Xword>,
i = 4213535,
s = 0x404b1f <Xword> "UH\211\345H\213\005&\307-"
}, [8] = {
f = 0x4ab88e,
i = 4896910,
s = 0x4ab88e "*"
}, [9] = {
f = 0x4051c5 <Xdol>,
i = 4215237,
s = 0x4051c5 <Xdol> "UH\211\345H\203\354\060H\213\005|\300-"
}, [10] = {
f = 0x404b1f <Xword>,
i = 4213535,
s = 0x404b1f <Xword> "UH\211\345H\213\005&\307-"
}, [11] = {
f = 0xc69ac0,
i = 13015744,
s = 0xc69ac0 "/usr/local/plan9/etc/rcmain"
}, [12] = {
f = 0x404b1f <Xword>,
i = 4213535,
s = 0x404b1f <Xword> "UH\211\345H\213\005&\307-"
}, [13] = {
f = 0x4ab890,
i = 4896912,
s = 0x4ab890 "."
}, [14] = {
f = 0x40a073 <Xsimple>,
i = 4235379,
s = 0x40a073 <Xsimple> "UH\211\345H\203\354\060H\213\005\316q-"
}, [15] = {
f = 0x404592 <Xexit>,
i = 4212114,
s = 0x404592 <Xexit> "UH\211\345ATSH\203\354\020\350^\346\004"
}, [16] = {
f = 0x0,
i = 0,
s = 0x0
}, [17] = {
f = 0x42bd41 <malloc+81>,
i = 4373825,
s = 0x42bd41 <malloc+81> "H\205\300H\211\302\017\204", <incomplete
sequence \313>
}, [18] = {
f = 0x0,
i = 0,
s = 0x0
}, [19] = {
f = 0x41ed96 <getenv+22>,
i = 4320662,
s = 0x41ed96 <getenv+22> "H\213-\273\003,"
}, [20] = {
f = 0x7ffcd72751a0,
i = -685289056,
s = 0x7ffcd72751a0 ""
}, [21] = {
f = 0x4c4285,
i = 4997765,
s = 0x4c4285 ""
}, [22] = {
f = 0x7ffcd736f2dc,
i = -684264740,
s = 0x7ffcd736f2dc "linux-vdso.so.1"
}, [23] = {
f = 0x10,
i = 16,
s = 0x10 <error: Cannot access memory at address 0x10>
}, [24] = {
f = 0x1,
i = 1,
s = 0x1 <error: Cannot access memory at address 0x1>
}, [25] = {
f = 0x4007a9 <init_cacheinfo+489>,
i = 4196265,
s = 0x4007a9 <init_cacheinfo+489> "H\211Ǹ"
}, [26] = {
f = 0x0,
i = 0,
s = 0x0
}, [27] = {
f = 0x1,
i = 1,
s = 0x1 <error: Cannot access memory at address 0x1>
}, [28] = {
f = 0x2,
i = 2,
s = 0x2 <error: Cannot access memory at address 0x2>
}, [29] = {
f = 0x7ffcd7275338,
i = -685288648,
s = 0x7ffcd7275338 "$\\'\327\374\177"
}, [30] = {
f = 0x7ffcd7275350,
i = -685288624,
s = 0x7ffcd7275350 ".\\'\327\374\177"
}, [31] = {
f = 0x2,
i = 2,
s = 0x2 <error: Cannot access memory at address 0x2>
}}
num = "7973\000\000\000\000\063\000\000"
rcmain = 0xc69ac0 "/usr/local/plan9/etc/rcmain"
i = 0
I am running arch linux 4.8.12-3 with gcc 6.2.1 and 9base commit de27e3fba5
(which is HEAD). `make -n -f Makefile rc` in 9base/rc results this:
echo CC code.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 code.c
echo CC exec.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 exec.c
echo CC getflags.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 getflags.c
echo CC glob.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 glob.c
echo CC here.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 here.c
echo CC io.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 io.c
echo CC lex.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 lex.c
echo CC pcmd.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 pcmd.c
echo CC pfnc.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 pfnc.c
echo CC simple.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 simple.c
echo CC subr.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 subr.c
echo CC trap.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 trap.c
echo CC tree.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 tree.c
echo CC unixcrap.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 unixcrap.c
echo CC var.c
cc -c -I. -DPLAN9PORT -DPREFIX="\"/usr/local/plan9\"" -g -I../lib9
-I/usr/local/plan9/include -I../lib9 var.c
That's all information I could gather. I hope this can be reproduced.
Greetings,
pranomostro
