php / php/php-src

PTY read differences on Illumos

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Bug Extension: standard OS: Illumos SAPI: cli
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C
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Description

Description

When testing some other things on Illumos, I noticed that t/standard/tests/file/bug69442.phpt test hangs due to some pty incompatibility:

Truss output 

    # truss /usr/local/bin/php ext/standard/tests/file/bug69442.phpt
execvex("/usr/local/bin/php", 0xFFFFFC7FFFDFCC68, 0xFFFFFC7FFFDFCC80, 0)  argc = 2
sysinfo(SI_MACHINE, "i86pc", 257)               = 6
mmap(0x00000000, 56, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FE2ED0000
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FED070000
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FED0F0000
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEEB70000
memcntl(0xFFFFFC7FEF399000, 88824, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEECD0000
memcntl(0x00400000, 1632728, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
resolvepath("/usr/lib/amd64/ld.so.1", "/lib/amd64/ld.so.1", 1023) = 18
resolvepath("/usr/local/bin/php", "/usr/local/bin/php", 1023) = 18
stat("/usr/local/bin/php", 0xFFFFFC7FFFDFC8B0)  = 0
open("/var/ld/64/ld.config", O_RDONLY)          Err#2 ENOENT
stat("/usr/ucblib/libresolv.so.2", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/14/lib/amd64/libresolv.so.2", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libresolv.so.2", 0xFFFFFC7FFFDFBC80) = 0
resolvepath("/lib/64/libresolv.so.2", "/lib/amd64/libresolv.so.2", 1023) = 25
open("/lib/64/libresolv.so.2", O_RDONLY)        = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEECD0CC0, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF2C0000
memcntl(0xFFFFFC7FEF200000, 118392, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/ucblib/libproc.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/14/lib/amd64/libproc.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libproc.so.1", 0xFFFFFC7FFFDFBC80) = 0
resolvepath("/lib/64/libproc.so.1", "/lib/amd64/libproc.so.1", 1023) = 23
open("/lib/64/libproc.so.1", O_RDONLY)          = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF2C0C40, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF360000
memcntl(0xFFFFFC7FEF2F0000, 89320, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/ucblib/libm.so.2", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/14/lib/amd64/libm.so.2", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libm.so.2", 0xFFFFFC7FFFDFBC80)   = 0
resolvepath("/lib/64/libm.so.2", "/lib/amd64/libm.so.2", 1023) = 20
open("/lib/64/libm.so.2", O_RDONLY)             = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF360B58, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF370000
memcntl(0xFFFFFC7FEEEC0000, 81056, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/ucblib/libnsl.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/14/lib/amd64/libnsl.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libnsl.so.1", 0xFFFFFC7FFFDFBC80) = 0
resolvepath("/lib/64/libnsl.so.1", "/lib/amd64/libnsl.so.1", 1023) = 22
open("/lib/64/libnsl.so.1", O_RDONLY)           = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF370AB0, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF2E0000
memcntl(0xFFFFFC7FEF0A0000, 186416, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/ucblib/libsocket.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/14/lib/amd64/libsocket.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libsocket.so.1", 0xFFFFFC7FFFDFBC80) = 0
resolvepath("/lib/64/libsocket.so.1", "/lib/amd64/libsocket.so.1", 1023) = 25
open("/lib/64/libsocket.so.1", O_RDONLY)        = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF2E0B28, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF1A0000
memcntl(0xFFFFFC7FEF280000, 34808, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/ucblib/libgcc_s.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/14/lib/amd64/libgcc_s.so.1", 0xFFFFFC7FFFDFBC80) = 0
resolvepath("/usr/gcc/14/lib/amd64/libgcc_s.so.1", "/usr/gcc/14/lib/amd64/libgcc_s.so.1", 1023) = 35
open("/usr/gcc/14/lib/amd64/libgcc_s.so.1", O_RDONLY) = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF1A0AB0, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF1D0000
memcntl(0xFFFFFC7FEF040000, 40752, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/ucblib/libc.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/14/lib/amd64/libc.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libc.so.1", 0xFFFFFC7FFFDFBC80)   = 0
resolvepath("/lib/64/libc.so.1", "/lib/amd64/libc.so.1", 1023) = 20
open("/lib/64/libc.so.1", O_RDONLY)             = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF1D0A60, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF1F0000
memcntl(0xFFFFFC7FEECF0000, 445576, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/gcc/10/lib/amd64/libc.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/gcc/10/lib/amd64/libsaveargs.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libsaveargs.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/lib/64/libsaveargs.so.1", 0xFFFFFC7FFFDFBC80) = 0
resolvepath("/usr/lib/64/libsaveargs.so.1", "/usr/lib/amd64/libsaveargs.so.1", 1023) = 31
open("/usr/lib/64/libsaveargs.so.1", O_RDONLY)  = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF1D0E50, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF180000
memcntl(0xFFFFFC7FEF160000, 4456, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/gcc/10/lib/amd64/libdisasm.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/lib/64/libdisasm.so.1", 0xFFFFFC7FFFDFBC80) Err#2 ENOENT
stat("/usr/lib/64/libdisasm.so.1", 0xFFFFFC7FFFDFBC80) = 0
resolvepath("/usr/lib/64/libdisasm.so.1", "/usr/lib/amd64/libdisasm.so.1", 1023) = 29
open("/usr/lib/64/libdisasm.so.1", O_RDONLY)    = 3
mmapobj(3, MMOBJ_INTERPRET, 0xFFFFFC7FEF180D18, 0xFFFFFC7FFFDFBBDC, 0x00000000) = 0
close(3)                                        = 0
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF1C0000
memcntl(0xFFFFFC7FEEF90000, 106784, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
stat("/usr/gcc/10/lib/amd64/libnsl.so.1", 0xFFFFFC7FFFDFB690) Err#2 ENOENT
stat("/usr/gcc/10/lib/amd64/libsocket.so.1", 0xFFFFFC7FFFDFB7C0) Err#2 ENOENT
mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, 4294967295, 0) = 0xFFFFFC7FEF090000
mmap(0x00010000, 24576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON|MAP_ALIGN, -1, 0) = 0xFFFFFC7FEEF70000
getcontext(0xFFFFFC7FFFDFC3D0)
getrlimit(RLIMIT_STACK, 0xFFFFFC7FFFDFC3C0)     = 0
getpid()                                        = 11858 [11857]
lwp_private(0, 0, 0xFFFFFC7FEEF72A40)           = 0x00000000
getrandom("91F0\0ABB9 Warning: Undefined array key "TEST_PHP_EXECUTABLE" in /home/jakub/prog/php/master/ext/standard/tests/file/bug69442.phpt on line 16

write(1, "\n W a r n i n g :   U n".., 132)     = 132

access("/usr/bin/sh", X_OK)                     = 0

open("/dev/null", O_RDWR)                       = 4

fcntl(4, F_GETFD, 0xFFFFFE0BDD07CBE0)           = 0

pipe([5,6], 0)                                  = 0

access("/usr/bin/sh", X_OK)                     = 0

lwp_sigmask(SIG_SETMASK, 0xFFBFFEFF, 0xFFFFFFFF, 0x000003FF, 0x00000000) = 0x00000000 [0x00000000]

vforkx(FORK_NOSIGCHLD|FORK_WAITPID)             = 11859

lwp_sigmask(SIG_SETMASK, 0x00000000, 0x00000000, 0x00000000, 0x00000000) = 0xFFBFFEFF [0xFFFFFFFF]

close(6)                                        = 0

fcntl(5, F_DUP2FD, 0x00000004)                  = 4

close(5)                                        = 0

read(4, " s h :   - d :   n o t  ".., 8192)     = 46

read(4, 0xFFFFFC7FEE694000, 8192)               = 0

lseek(4, 0, SEEK_CUR)                           Err#29 ESPIPE

close(4)                                        = 0

waitid(P_PID, 11859, 0xFFFFFC7FFFDFA8F0, WEXITED|WTRAPPED) = 0

unlink("/var/tmp/bug69442a6htqkqpvjl8bLkaqkx")  = 0

--FILE--

write(1, " - - F I L E - -\n", 9)               = 9

open("/dev/ptmx", O_RDWR|O_NOCTTY)              = 4

ioctl(4, I_STR, 0xFFFFFC7FFFDFA8E0)             = 0

fstat(4, 0xFFFFFC7FFFDFA900)                    = 0

getuid()                                        = 0 [0]

getuid()                                        = 0 [0]

getpid()                                        = 11858 [11857]

open("/proc/11858/psinfo", O_RDONLY)            = 5

read(5, "\0\0\00201\0\0\0 R .\0\0".., 416)      = 416

close(5)                                        = 0

mmap(0x00010000, 65536, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON|MAP_ALIGN, 4294967295, 0) = 0xFFFFFC7FEECB0000

getuid()                                        = 0 [0]

getuid()                                        = 0 [0]

open("/var/run/name_service_door", O_RDONLY)    = 5

fcntl(5, F_SETFD, FD_CLOEXEC)                   = 0

door_info(5, 0xFFFFFC7FEEE7DC00)                = 0

door_call(5, 0xFFFFFC7FFFDFA5E0)                = 0

ioctl(4, I_STR, 0xFFFFFC7FFFDFA9C0)             = 0

ioctl(4, I_STR, 0xFFFFFC7FFFDFA9D0)             = 0

ioctl(4, I_STR, 0xFFFFFC7FFFDFA8D0)             = 0

fstat(4, 0xFFFFFC7FFFDFA8F0)                    = 0

access("/dev/pts/3", F_OK)                      = 0

open("/dev/pts/3", O_RDONLY|O_NOCTTY)           = 6

ioctl(6, I_PUSH, "ptem")                        = 0

fcntl(6, F_DUPFD, 0x00000000)                   = 7

fcntl(4, F_DUPFD, 0x00000000)                   = 8

fcntl(6, F_DUPFD, 0x00000000)                   = 9

fcntl(4, F_DUPFD, 0x00000000)                   = 10

fcntl(6, F_DUPFD, 0x00000000)                   = 11

fcntl(4, F_DUPFD, 0x00000000)                   = 12

pipe([13,14], 0)                                = 0

fcntl(13, F_SETFD, FD_CLOEXEC)                  = 0

lwp_sigmask(SIG_SETMASK, 0xFFBFFEFF, 0xFFFFFFFF, 0x000003FF, 0x00000000) = 0x00000000 [0x00000000]

vforkx(0)                                       = 11860

lwp_sigmask(SIG_SETMASK, 0x00000000, 0x00000000, 0x00000000, 0x00000000) = 0xFFBFFEFF [0xFFFFFFFF]

close(7)                                        = 0

fstat(8, 0xFFFFFC7FEE68A3B8)                    = 0

close(9)                                        = 0

fstat(10, 0xFFFFFC7FEE68A498)                   = 0

close(11)                                       = 0

fstat(12, 0xFFFFFC7FEE68A578)                   = 0

close(14)                                       = 0

fstat(13, 0xFFFFFC7FEE68A658)                   = 0

close(4)                                        = 0

close(6)                                        = 0

read(8, 0xFFFFFC7FEE699000, 8192)               = 0

Received signal #18, SIGCLD, in read() [default]

siginfo: SIGCLD CLD_EXITED pid=11860 status=0x002A

read(8, 0xFFFFFC7FEE699000, 8192) (sleeping...)

^[[B^[[B^[[Aq^C    Received signal #2, SIGINT, in read() [caught]

PHP Version
PHP 8.3
Operating System

OmniOS r151054

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Research direction

Reproduce the hang in t/standard/tests/file/bug69442.phpt on Illumos and use the included truss output as the starting evidence. Trace the PTY read behavior reached by this test, then verify that the test completes without hanging on Illumos.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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