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igalic/strace -C hello # compiled as rustc -C opt-level=s hello.rs

Last active January 5, 2020 13:43
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87 syscalls; 7 of which result in an error; all of those are due to lookup attempts to /etc/ld.so.nohwcap (and one to /etc/ld.so.preload)
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strace -C hello # compiled as rustc -C opt-level=s hello.rs
execve("./hello", ["./hello"], 0x7ffd3cf13d58 /* 68 vars */) = 0
brk(NULL) = 0x56039295a000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=91244, ...}) = 0
mmap(NULL, 91244, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f4611488000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14560, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4611486000
mmap(NULL, 2109712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f4611074000
mprotect(0x7f4611077000, 2093056, PROT_NONE) = 0
mmap(0x7f4611276000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f4611276000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/librt.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\"\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=31680, ...}) = 0
mmap(NULL, 2128864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f4610e6c000
mprotect(0x7f4610e73000, 2093056, PROT_NONE) = 0
mmap(0x7f4611072000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f4611072000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000b\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=144976, ...}) = 0
mmap(NULL, 2221184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f4610c4d000
mprotect(0x7f4610c67000, 2093056, PROT_NONE) = 0
mmap(0x7f4610e66000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f4610e66000
mmap(0x7f4610e68000, 13440, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f4610e68000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300*\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=96616, ...}) = 0
mmap(NULL, 2192432, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f4610a35000
mprotect(0x7f4610a4c000, 2093056, PROT_NONE) = 0
mmap(0x7f4610c4b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7f4610c4b000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/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\0\260\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2030544, ...}) = 0
mmap(NULL, 4131552, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f4610644000
mprotect(0x7f461082b000, 2097152, PROT_NONE) = 0
mmap(0x7f4610a2b000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f4610a2b000
mmap(0x7f4610a31000, 15072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f4610a31000
close(3) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4611484000
arch_prctl(ARCH_SET_FS, 0x7f4611485300) = 0
mprotect(0x7f4610a2b000, 16384, PROT_READ) = 0
mprotect(0x7f4610c4b000, 4096, PROT_READ) = 0
mprotect(0x7f4610e66000, 4096, PROT_READ) = 0
mprotect(0x7f4611072000, 4096, PROT_READ) = 0
mprotect(0x7f4611276000, 4096, PROT_READ) = 0
mprotect(0x56039200d000, 8192, PROT_READ) = 0
mprotect(0x7f461149f000, 4096, PROT_READ) = 0
munmap(0x7f4611488000, 91244) = 0
set_tid_address(0x7f46114855d0) = 32193
set_robust_list(0x7f46114855e0, 24) = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7f4610c52cb0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f4610c5f890}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7f4610c52d50, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f4610c5f890}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=[PIPE], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f4610682f20}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
brk(NULL) = 0x56039295a000
brk(0x56039297b000) = 0x56039297b000
openat(AT_FDCWD, "/proc/self/maps", O_RDONLY|O_CLOEXEC) = 3
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
read(3, "560391dde000-560391e0d000 r-xp 0"..., 1024) = 1024
read(3, "24 /lib/x86_6"..., 1024) = 1024
read(3, " r--p 00006000 fd:02 4723827 "..., 1024) = 1024
read(3, "-p 00000000 00:00 0 \n7ffc566ca00"..., 1024) = 346
close(3) = 0
sched_getaffinity(32193, 32, [0, 2, 4, 6]) = 8
rt_sigaction(SIGSEGV, {sa_handler=0x560391deadf0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_SIGINFO, sa_restorer=0x7f4610c5f890}, NULL, 8) = 0
rt_sigaction(SIGBUS, {sa_handler=0x560391deadf0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_SIGINFO, sa_restorer=0x7f4610c5f890}, NULL, 8) = 0
sigaltstack(NULL, {ss_sp=NULL, ss_flags=SS_DISABLE, ss_size=0}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f461149d000
sigaltstack({ss_sp=0x7f461149d000, ss_flags=0, ss_size=8192}, NULL) = 0
write(1, "hello world!\n", 13) = 13
sigaltstack({ss_sp=NULL, ss_flags=SS_DISABLE, ss_size=8192}, NULL) = 0
munmap(0x7f461149d000, 8192) = 0
exit_group(0) = ?
+++ exited with 0 +++
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
0.00 0.000000 0 9 read
0.00 0.000000 0 1 write
0.00 0.000000 0 7 close
0.00 0.000000 0 7 fstat
0.00 0.000000 0 16 mmap
0.00 0.000000 0 12 mprotect
0.00 0.000000 0 2 munmap
0.00 0.000000 0 3 brk
0.00 0.000000 0 5 rt_sigaction
0.00 0.000000 0 1 rt_sigprocmask
0.00 0.000000 0 7 7 access
0.00 0.000000 0 1 execve
0.00 0.000000 0 3 sigaltstack
0.00 0.000000 0 1 arch_prctl
0.00 0.000000 0 1 sched_getaffinity
0.00 0.000000 0 1 set_tid_address
0.00 0.000000 0 7 openat
0.00 0.000000 0 1 set_robust_list
0.00 0.000000 0 2 prlimit64
------ ----------- ----------- --------- --------- ----------------
100.00 0.000000 87 7 total
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