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[Bug libc/21738] misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail


https://sourceware.org/bugzilla/show_bug.cgi?id=21738

--- Comment #4 from Markus Trippelsdorf <markus at trippelsdorf dot de> ---
markus@x4 misc % strace ./tst-preadvwritev64v2
execve("./tst-preadvwritev64v2", ["./tst-preadvwritev64v2"], 0x7ffceb4c3710 /*
54 vars */) = 0                                                                 
brk(NULL)                               = 0x75f000                              
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f4f5b0a8000
access("/etc/ld.so.preload", R_OK)      = 0 
openat(AT_FDCWD, "/etc/ld.so.preload", O_RDONLY|O_CLOEXEC) = 3                  
fstat(3, {st_mode=S_IFREG|0644, st_size=1, ...}) = 0                            
mmap(NULL, 1, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0x7f4f5b0a7000         
close(3)                                = 0 
munmap(0x7f4f5b0a7000, 1)               = 0 
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3                    
fstat(3, {st_mode=S_IFREG|0644, st_size=168310, ...}) = 0                       
mmap(NULL, 168310, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f4f5b07e000               
close(3)                                = 0 
openat(AT_FDCWD, "/lib/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\r\2\0\0\0\0\0"...,
832) = 832  
fstat(3, {st_mode=S_IFREG|0755, st_size=16590728, ...}) = 0                     
mmap(NULL, 3873088, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f4f5aad0000                                                                  
mprotect(0x7f4f5ac78000, 2097152, PROT_NONE) = 0                                
mmap(0x7f4f5ae78000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a8000) = 0x7f4f5ae78000              
mmap(0x7f4f5ae7e000, 14656, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f4f5ae7e000                    
close(3)                                = 0 
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f4f5b07b000                                                                  
arch_prctl(ARCH_SET_FS, 0x7f4f5b07b740) = 0 
mprotect(0x7f4f5ae78000, 16384, PROT_READ) = 0                                  
mprotect(0x603000, 4096, PROT_READ)     = 0 
mprotect(0x7f4f5b0aa000, 4096, PROT_READ) = 0                                   
munmap(0x7f4f5b07e000, 168310)          = 0 
mmap(NULL, 8, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0) =
0x7f4f5b0a7000    
brk(NULL)                               = 0x75f000                              
brk(0x780000)                           = 0x780000                              
getpid()                                = 14335                                 
openat(AT_FDCWD, "/tmp/tst-preadvwritev.WTFpsh", O_RDWR|O_CREAT|O_EXCL, 0600) =
3        
getpid()                                = 14335                                 
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7f4f5b07ba10) = 14336                                            
rt_sigaction(SIGALRM, {sa_handler=0x401c80, sa_mask=[ALRM],
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f4f5ab06eb0},
{sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0     
alarm(20)                               = 0 
error: tst-preadvwritev2-common.c:38: preadv2 did not fail with an invalid flag 
rt_sigaction(SIGINT, {sa_handler=0x401c80, sa_mask=[INT],
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f4f5ab06eb0},
{sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0       
wait4(14336, [{WIFEXITED(s) && WEXITSTATUS(s) == 1}], 0, NULL) = 14336          
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=14336, si_uid=1000,
si_status=1, si_utime=0, si_stime=0} ---                                        
write(1, "error: 1 test failures\n", 23error: 1 test failures                   
) = 23                                      
getpid()                                = 14335                                 
unlink("/tmp/tst-preadvwritev.WTFpsh")  = 0 
exit_group(1)                           = ? 
+++ exited with 1 +++

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