Re: compiling mmap?

On May 24, 2004, at 9:15 AM, ts wrote:

>>>>>> "M" == Mark Hubbart <[e-mail]> writes:
>
> M> test_13_div(TestMmap) [mmapt.rb:304]:
> M> empty.
> M> <true> expected but was
> M> <false>.
>
>  Well, it's normal : the test is not adapted with "rw" it will not 
> truncate
>  the file. This is not the good correction, try with
>
> svg% diff -u mmap.c~ mmap.c
> --- mmap.c~     2004-05-24 11:20:04.000000000 +0200
> +++ mmap.c      2004-05-24 18:13:45.000000000 +0200
> @@ -420,10 +420,7 @@
>         }
>         else if (strcmp(mode, "w") == 0) {
>             smode = O_RDWR | O_TRUNC;
> -           pmode = PROT_WRITE;
> -           if (!NIL_P(fdv)) {
> -               pmode |= PROT_READ;
> -           }
> +           pmode = PROT_READ | PROT_WRITE;
>         }
>         else if (strcmp(mode, "rw") == 0 || strcmp(mode, "wr") == 0) {
>             smode = O_RDWR;
> svg%
>
>  and in tests/mmapt.rb reverse the modification
>
>    assert_kind_of(Mmap, m1 = Mmap.new("tmp/bb", "w"), "new a")

well, patch failed, are you working with a cvs version? anyway, I made 
the change by hand, and I got a bus error:

(gdb) run -d tests/mmapt.rb
Starting program: /usr/local/bin/ruby -d tests/mmapt.rb
Reading symbols for shared libraries +... done
tests/mmapt.rb:2: warning: `*' interpreted as argument prefix
Reading symbols for shared libraries . done
Loaded suite tests/mmapt
Started
.............
Program received signal EXC_BAD_ACCESS, Could not access memory.
0xffff87b8 in __memcpy ()
(gdb) bt
#0  0xffff87b8 in __memcpy ()
#1  0x0004dc6c in mm_cat (str=1760744, ptr=0x62edf0 
"azertyuiopqsdfghjklm", len=20) at mmap.c:1100
#2  0x0004dcd0 in mm_append (str1=1760744, str2=1761584) at mmap.c:1112
#3  0x0004dd24 in mm_concat (str1=970752, str2=6483440) at mmap.c:1127
#4  0x00202370 in rb_call0 (klass=105488, recv=1760744, id=334, 
oid=334, argc=1, argv=0xbffda490, body=0x19080, nosuper=0) at 
eval.c:5479
#5  0x00202ca4 in rb_call (klass=105488, recv=334, mid=3221069616, 
argc=1, argv=0xbffda490, scope=2708276) at eval.c:5696
#6  0x001fd1d0 in rb_eval (self=3222536192, n=0x62edf0) at ruby.h:634
#7  0x001fd288 in rb_eval (self=0, n=0x62edf0) at eval.c:3233
#8  0x002027fc in rb_call0 (klass=1127219200, recv=2147483648, 
id=1082247168, oid=3221070996, argc=-1072431104, argv=0x0, 
body=0xbffdd3e0, nosuper=0) at eval.c:5603
#9  0x00202ca4 in rb_call (klass=520656, recv=3221070996, 
mid=3221070960, argc=1760744, argv=0x1, scope=0) at eval.c:5696
#10 0x00202ed0 in rb_f_send (argc=0, argv=0xbffdd9b4, recv=490336) at 
ruby.h:634
#11 0x00202370 in rb_call0 (klass=232608, recv=490336, id=3905, 
oid=490336, argc=1, argv=0xbffdd9b0, body=0x36d60, nosuper=0) at 
eval.c:5479
#12 0x00202ca4 in rb_call (klass=232608, recv=490336, mid=3221084596, 
argc=491816, argv=0x2a2dc8, scope=520656) at eval.c:5696
#13 0x001fd434 in rb_eval (self=3222536192, n=0x62edf0) at ruby.h:634
#14 0x001fc850 in rb_eval (self=490336, n=0x62edf0) at eval.c:3054
#15 0x001fc99c in rb_eval (self=490336, n=0x62edf0) at eval.c:3079
#16 0x002027fc in rb_call0 (klass=1127219200, recv=2147483648, 
id=1082247168, oid=3221084596, argc=-1072431104, argv=0x0, 
body=0xbffe1cf0, nosuper=0) at eval.c:5603
#17 0x00202ca4 in rb_call (klass=688776, recv=3221084596, 
mid=3221084560, argc=1, argv=0xbffdd9b0, scope=0) at eval.c:5696
#18 0x001fd1d0 in rb_eval (self=3222536192, n=0x62edf0) at ruby.h:634
#19 0x00208434 in block_pass (self=491556, node=0xa93e0) at eval.c:8357
#20 0x001fc194 in rb_eval (self=491556, n=0x62edf0) at eval.c:2929
#21 0x00200724 in rb_yield_0 (val=490336, self=491556, klass=0, 
flags=-1073858896, avalue=0) at eval.c:4687
#22 0x001e6464 in rb_ary_each (ary=3221113792) at array.c:1155
#23 0x00202370 in rb_call0 (klass=204848, recv=490916, id=3849, oid=0, 
argc=0, argv=0x0, body=0x31c0c, nosuper=0) at eval.c:5479
#24 0x00202ca4 in rb_call (klass=204848, recv=0, mid=3221108400, 
argc=0, argv=0x0, scope=-1073853504) at eval.c:5696
#25 0x001fd1d0 in rb_eval (self=491556, n=0x62edf0) at ruby.h:634
#26 0x001fc350 in rb_eval (self=491556, n=0x62edf0) at eval.c:2943
#27 0x002027fc in rb_call0 (klass=1127219200, recv=2147483648, 
id=1082247168, oid=0, argc=-1072431104, argv=0x0, body=0xbffe8760, 
nosuper=0) at eval.c:5603
#28 0x00202ca4 in rb_call (klass=689956, recv=0, mid=3221117104, 
argc=490916, argv=0x0, scope=2708280) at eval.c:5696
#29 0x001fd1d0 in rb_eval (self=3222536192, n=0x62edf0) at ruby.h:634
#30 0x00208434 in block_pass (self=493516, node=0xa93e0) at eval.c:8357
#31 0x001fc194 in rb_eval (self=493516, n=0x62edf0) at eval.c:2929
#32 0x00200724 in rb_yield_0 (val=491556, self=493516, klass=0, 
flags=-1073831648, avalue=0) at eval.c:4687
#33 0x001e6464 in rb_ary_each (ary=3221141040) at array.c:1155
#34 0x00202370 in rb_call0 (klass=204848, recv=493476, id=3849, oid=0, 
argc=0, argv=0x0, body=0x31c0c, nosuper=0) at eval.c:5479
#35 0x00202ca4 in rb_call (klass=204848, recv=0, mid=3221135648, 
argc=0, argv=0x0, scope=-1073826256) at eval.c:5696
#36 0x001fd1d0 in rb_eval (self=493516, n=0x62edf0) at ruby.h:634
#37 0x001fc350 in rb_eval (self=493516, n=0x62edf0) at eval.c:2943
#38 0x002027fc in rb_call0 (klass=1127219200, recv=2147483648, 
id=1082247168, oid=0, argc=-1072431104, argv=0x0, body=0xbffef1d0, 
nosuper=0) at eval.c:5603
#39 0x00202ca4 in rb_call (klass=689956, recv=0, mid=3221144352, 
argc=493476, argv=0x0, scope=2708280) at eval.c:5696
#40 0x001fd1d0 in rb_eval (self=3222536192, n=0x62edf0) at ruby.h:634
#41 0x001fc350 in rb_eval (self=3259744661, n=0x62edf0) at eval.c:2943
#42 0x002027fc in rb_call0 (klass=3259744661, recv=2273678227, 
id=3259744661, oid=3221156372, argc=1127219200, argv=0x80000000, 
body=0x4081c800, nosuper=0) at eval.c:5603
#43 0x00202ca4 in rb_call (klass=455416, recv=3221156372, 
mid=3221156336, argc=493516, argv=0x1, scope=0) at eval.c:5696
#44 0x001fd1d0 in rb_eval (self=454776, n=0x62edf0) at ruby.h:634
#45 0x002027fc in rb_call0 (klass=454616, recv=454776, id=13777, 
oid=484956, argc=0, argv=0x0, body=0x765bc, nosuper=0) at eval.c:5603
#46 0x00202ca4 in rb_call (klass=454616, recv=484956, mid=3221168400, 
argc=453876, argv=0x0, scope=0) at eval.c:5696
#47 0x001fd4f8 in rb_eval (self=454776, n=0x62edf0) at ruby.h:634
#48 0x002027fc in rb_call0 (klass=454616, recv=454776, id=5041, 
oid=487856, argc=0, argv=0x0, body=0x7714c, nosuper=0) at eval.c:5603
#49 0x00202ca4 in rb_call (klass=454616, recv=487856, mid=3221175008, 
argc=0, argv=0x0, scope=0) at eval.c:5696
#50 0x001fd1d0 in rb_eval (self=454616, n=0x62edf0) at ruby.h:634
#51 0x002027fc in rb_call0 (klass=1127219200, recv=2147483648, 
id=1082247168, oid=664116, argc=-1072431104, argv=0x0, body=0xbfff6eb0, 
nosuper=0) at eval.c:5603
#52 0x00202ca4 in rb_call (klass=662296, recv=664116, mid=3221181616, 
argc=454776, argv=0x0, scope=0) at eval.c:5696
#53 0x001fd1d0 in rb_eval (self=3222536192, n=0x62edf0) at ruby.h:634
#54 0x001fcfcc in rb_eval (self=519676, n=0x62edf0) at eval.c:3217
#55 0x002027fc in rb_call0 (klass=3222536192, recv=0, id=3221200240, 
oid=3221188344, argc=2108580, argv=0x87859393, body=0xc24bc195, 
nosuper=0) at eval.c:5603
#56 0x00202ca4 in rb_call (klass=522456, recv=3221188344, 
mid=3221188304, argc=454616, argv=0x2, scope=0) at eval.c:5696
#57 0x001fd1d0 in rb_eval (self=522456, n=0x62edf0) at ruby.h:634
#58 0x002027fc in rb_call0 (klass=1127219200, recv=2147483648, 
id=1082247168, oid=686876, argc=-1072431104, argv=0x0, body=0xbfffb770, 
nosuper=0) at eval.c:5603
#59 0x00202ca4 in rb_call (klass=522436, recv=686876, mid=3221200240, 
argc=519676, argv=0x0, scope=2708280) at eval.c:5696
#60 0x001fd1d0 in rb_eval (self=3222536192, n=0x62edf0) at ruby.h:634
#61 0x001fd288 in rb_eval (self=3222536192, n=0x62edf0) at eval.c:3233
#62 0x00200724 in rb_yield_0 (val=520556, self=227808, klass=0, 
flags=-1073760368, avalue=2) at eval.c:4687
#63 0x00207bf4 in proc_invoke (proc=521396, args=520556, self=6, 
klass=3221206928) at ruby.h:634
#64 0x002061d4 in call_end_proc (data=522456) at eval.c:7363
#65 0x00206524 in rb_exec_end_proc () at eval.c:7444
#66 0x001f8a9c in ruby_finalize_0 () at eval.c:1390
#67 0x001f8b78 in ruby_cleanup (ex=0) at eval.c:1418
#68 0x001f8dc4 in ruby_stop (ex=970752) at eval.c:1465
#69 0x001f8e28 in ruby_run () at eval.c:1477
#70 0x00001d84 in main (argc=0, argv=0x0, envp=0x617a6572) at main.c:50
#71 0x00001a84 in _start (argc=3, argv=0xbffffd30, envp=0xbffffd40) at 
/SourceCache/Csu/Csu-46/crt.c:267
#72 0x000018f8 in start ()

Thanks,
Mark