<div><pre>Version:strace-4.14, strace-4.13, strace-4.5.20
Environment: ubuntu 16.04.1 LTS x86_64
I use strace to trace a program with time() system call,
but it not print time() system call. I also do the same
test on ubuntu 14.04 LTS i386, it can trace time() system call.
I can find the time() system in strace-4.14/linux/x86_64/syscallent.h
and strace-4.14/linux/dummy.h.
So I think it may be a bug and report it.Thank you.
test program: test.c
#include <stdlib.h>
#include <time.h>
int main()
{
time_t t;
t = time(NULL);
return 0;
}
$strace -o output.txt ./test
output.txt:
execve("./a.out", ["./a.out"], [/* 72 vars */]) = 0
brk(NULL) = 0xb5c000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2284ddc000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=112807, ...}) = 0
mmap(NULL, 112807, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2284dc0000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/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\0P\t\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f22847f0000
mprotect(0x7f22849b0000, 2093056, PROT_NONE) = 0
mmap(0x7f2284baf000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7f2284baf000
mmap(0x7f2284bb5000, 14848, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2284bb5000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2284dbf000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2284dbe000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2284dbd000
arch_prctl(ARCH_SET_FS, 0x7f2284dbe700) = 0
mprotect(0x7f2284baf000, 16384, PROT_READ) = 0
mprotect(0x600000, 4096, PROT_READ) = 0
mprotect(0x7f2284dde000, 4096, PROT_READ) = 0
munmap(0x7f2284dc0000, 112807) = 0
exit_group(0) = ?
+++ exited with 0 +++
$strace -e time ./test
only print:
+++ exited with 0 +++
This is my first time send email to mail list, if something wrong, please point it out.
Thank you.</pre></div>