1. Article purpose[edit source]
This article provides the basic information needed to start using the Linux tool: strace[1].
2. Introduction[edit source]
The following table provides a brief description of the tool, as well as its availability depending on the software packages:
: this tool is either present (ready to use or to be activated), or can be integrated and activated on the software package.
: this tool is not present and cannot be integrated, or it is present but cannot be activated on the software package.
| Tool | STM32MPU Embedded Software distribution | STM32MPU Embedded Software distribution for Android™ | ||||||
|---|---|---|---|---|---|---|---|---|
| Name | Category | Purpose | Starter Package | Developer Package | Distribution Package | Starter Package | Developer Package | Distribution Package |
| strace | Tracing tools | strace[1] is able to intercept and record the system calls which are called by a process and the signals which are received by another process. | |
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3. Installing the trace and debug tool on your target board[edit source]
3.1. Using the STM32MPU Embedded Software distribution[edit source]
strace is installed by default and ready to be used with all STM32MPU Embedded Software Packages.
which strace /usr/bin/strace
strace is integrated in weston image distribution through meta-st package: meta-st/meta-st-openstlinux/recipes-st/packagegroups/packagegroup-framework-tools.bb.
RDEPENDS_packagegroup-framework-tools-kernel-base = "\
can-utils \
i2c-tools \
strace \
usbutils \
\
evtest \
memtester \
mtd-utils \
v4l-utils \
"
3.2. Using the STM32MPU Embedded Software distribution for Android™[edit source]
strace is installed by default (/system/bin/strace) and is ready to be used with all STM32MPU software packages for Android™.
which strace /system/bin/strace
It is integrated in Android image distribution through Android base makefile: build/make/target/product/base.mk:
# Packages included only for eng or userdebug builds, previously debug tagged
PRODUCT_PACKAGES_DEBUG := \
logpersist.start \
perfprofd \
sqlite3 \
strace
4. Getting started[edit source]
To use strace, two main methods:
- by giving, as parameter, the name of program for which you want to list system calls, and its arguments if required:
strace <Program> [Prog_Args]
- by giving, as parameter, the PID of the process to be studied:
strace -p <PID>
Some of useful command options:
-a <num> : alignment num COLUMN for printing syscall results -r : print relative timestamp -t : print absolute timestamp -T : print time spent in each syscall
Other options can be set. For detail, please refer to manual page[2].
5. To go further[edit source]
5.1. Example[edit source]
As example, this is possible to get system call for a multimedia file playback with gst-play:
strace -rT -a 100 gst-play-1.0 /usr/local/demo/media/ST2297_visionv3.webm
0.000000 execve("/usr/bin/gst-play-1.0", ["gst-play-1.0", "[...]"...], 0xbeb10c00 /* 24 vars */) = 0 <0.001485>
0.002800 brk(NULL) = 0x28000 <0.000069>
0.000717 uname({sysname="Linux", nodename="stm32mp1", ...}) = 0 <0.000069>
0.000591 mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6fa2000 <0.000093>
0.000673 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) <0.000109>
0.000734 openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 <0.000115>
0.000669 fstat64(3, {st_mode=S_IFREG|0644, st_size=24533, ...}) = 0 <0.000069>
0.000619 mmap2(NULL, 24533, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb6f9c000 <0.000091>
0.000599 close(3) = 0 <0.000065>
0.000668 openat(AT_FDCWD, "/usr/lib/libgstpbutils-1.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000114>
0.000646 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\300\234\0\0004\0\0\0"..., 512) = 512 <0.000083>
0.000611 fstat64(3, {st_mode=S_IFREG|0755, st_size=195640, ...}) = 0 <0.000080>
0.000712 mmap2(NULL, 260004, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6f34000 <0.000088>
0.000596 mprotect(0xb6f62000, 61440, PROT_NONE) = 0 <0.000098>
0.000609 mmap2(0xb6f71000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2d000) = 0xb6f71000 <0.000147>
0.000811 close(3) = 0 <0.000070>
0.000706 openat(AT_FDCWD, "/usr/lib/libgstvideo-1.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000138>
0.000754 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0P\317\0\0004\0\0\0"..., 512) = 512 <0.000079>
0.000612 fstat64(3, {st_mode=S_IFREG|0755, st_size=486440, ...}) = 0 <0.000070>
0.000618 mmap2(NULL, 552344, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6ead000 <0.000087>
0.000601 mprotect(0xb6f1c000, 61440, PROT_NONE) = 0 <0.000092>
0.000610 mmap2(0xb6f2b000, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6e000) = 0xb6f2b000 <0.000132>
0.000709 close(3) = 0 <0.000067>
0.000712 openat(AT_FDCWD, "/usr/lib/libgstaudio-1.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000121>
0.000673 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\0\236\0\0004\0\0\0"..., 512) = 512 <0.000078>
0.000606 fstat64(3, {st_mode=S_IFREG|0755, st_size=375816, ...}) = 0 <0.000067>
0.000623 mmap2(NULL, 440684, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6e41000 <0.000150>
0.000692 mprotect(0xb6e9b000, 61440, PROT_NONE) = 0 <0.000096>
0.000606 mmap2(0xb6eaa000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x59000) = 0xb6eaa000 <0.000130>
0.000722 close(3) = 0 <0.000071>
0.000700 openat(AT_FDCWD, "/usr/lib/libgsttag-1.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000135>
0.000755 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\370d\0\0004\0\0\0"..., 512) = 512 <0.000080>
0.000613 fstat64(3, {st_mode=S_IFREG|0755, st_size=215824, ...}) = 0 <0.000068>
0.000617 mmap2(NULL, 280136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6dfc000 <0.000087>
0.000597 mprotect(0xb6e2f000, 65536, PROT_NONE) = 0 <0.000090>
0.000617 mmap2(0xb6e3f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x33000) = 0xb6e3f000 <0.000121>
0.000702 close(3) = 0 <0.000070>
0.009092 openat(AT_FDCWD, "/usr/lib/libgstreamer-1.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000146>
0.010000 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\270\371\1\0004\0\0\0"..., 512) = 512 <0.000088>
0.010392 fstat64(3, {st_mode=S_IFREG|0755, st_size=1116268, ...}) = 0 <0.000072>
0.010210 mmap2(NULL, 1184392, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6cda000 <0.000107>
0.010879 mprotect(0xb6de7000, 61440, PROT_NONE) = 0 <0.000106>
0.010048 mmap2(0xb6df6000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x10c000) = 0xb6df6000 <0.000186>
0.011926 mmap2(0xb6dfb000, 648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6dfb000 <0.000141>
0.011239 close(3) = 0 <0.000073>
0.010260 openat(AT_FDCWD, "/usr/lib/libgobject-2.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000147>
0.009916 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\250\212\0\0004\0\0\0"..., 512) = 512 <0.000095>
0.010372 fstat64(3, {st_mode=S_IFREG|0755, st_size=294000, ...}) = 0 <0.000075>
0.010086 mmap2(NULL, 359636, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6c82000 <0.000102>
0.010916 mprotect(0xb6cc9000, 61440, PROT_NONE) = 0 <0.000103>
0.010033 mmap2(0xb6cd8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x46000) = 0xb6cd8000 <0.000143>
0.011876 close(3) = 0 <0.000074>
0.010153 openat(AT_FDCWD, "/usr/lib/libglib-2.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000146>
0.009983 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0XX\1\0004\0\0\0"..., 512) = 512 <0.000088>
0.010209 fstat64(3, {st_mode=S_IFREG|0755, st_size=990348, ...}) = 0 <0.000075>
0.010215 mmap2(NULL, 1056232, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6b80000 <0.000103>
0.010881 mprotect(0xb6c71000, 61440, PROT_NONE) = 0 <0.000100>
0.010032 mmap2(0xb6c80000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf0000) = 0xb6c80000 <0.000150>
0.011792 close(3) = 0 <0.000073>
0.010218 openat(AT_FDCWD, "/lib/libm.so.6", O_RDONLY|O_CLOEXEC) = 3 <0.000140>
0.010000 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\220E\0\0004\0\0\0"..., 512) = 512 <0.000084>
0.010212 fstat64(3, {st_mode=S_IFREG|0755, st_size=452028, ...}) = 0 <0.000073>
0.010207 mmap2(NULL, 516216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6b01000 <0.000101>
0.010877 mprotect(0xb6b6f000, 61440, PROT_NONE) = 0 <0.000110>
0.010035 mmap2(0xb6b7e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6d000) = 0xb6b7e000 <0.000152>
0.011806 close(3) = 0 <0.000075>
0.010130 openat(AT_FDCWD, "/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000134>
0.010086 read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\214H\0\0004\0\0\0"..., 512) = 512 <0.000085>
0.010211 fstat64(3, {st_mode=S_IFREG|0755, st_size=92656, ...}) = 0 <0.000074>
0.010208 mmap2(NULL, 164424, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6ad8000 <0.000100>
0.010813 mprotect(0xb6aee000, 61440, PROT_NONE) = 0 <0.000108>
0.010205 mmap2(0xb6afd000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0xb6afd000 <0.000172>
0.011742 mmap2(0xb6aff000, 4680, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6aff000 <0.000137>
0.011249 close(3) = 0 <0.000072>
0.010170 openat(AT_FDCWD, "/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 <0.000149>
0.009988 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\34l\1\0004\0\0\0"..., 512) = 512 <0.000088>
0.010219 fstat64(3, {st_mode=S_IFREG|0755, st_size=1218336, ...}) = 0 <0.000075>
0.010198 mmap2(NULL, 1287556, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb699d000 <0.000105>
0.010876 mprotect(0xb6ac3000, 61440, PROT_NONE) = 0 <0.000132>
0.010123 mmap2(0xb6ad2000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x125000) = 0xb6ad2000 <0.000177>
0.011925 mmap2(0xb6ad5000, 9604, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6ad5000 <0.000141>
0.011252 close(3) = 0 <0.000077>
0.010267 openat(AT_FDCWD, "/usr/lib/liborc-0.4.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000150>
0.009799 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0`u\0\0004\0\0\0"..., 512) = 512 <0.000090>
0.010386 fstat64(3, {st_mode=S_IFREG|0755, st_size=402508, ...}) = 0 <0.000073>
0.010032 mmap2(NULL, 466900, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb692b000 <0.000098>
0.010893 mprotect(0xb698a000, 61440, PROT_NONE) = 0 <0.000103>
0.010193 mmap2(0xb6999000, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5e000) = 0xb6999000 <0.000141>
0.011890 close(3) = 0 <0.000073>
0.010150 openat(AT_FDCWD, "/lib/libz.so.1", O_RDONLY|O_CLOEXEC) = 3 <0.000149>
0.009972 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\300\32\0\0004\0\0\0"..., 512) = 512 <0.000090>
0.010203 fstat64(3, {st_mode=S_IFREG|0755, st_size=79468, ...}) = 0 <0.000074>
0.010227 mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f9a000 <0.000105>
0.010939 mmap2(NULL, 143584, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6907000 <0.000098>
0.010737 mprotect(0xb691a000, 61440, PROT_NONE) = 0 <0.000104>
0.010209 mmap2(0xb6929000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x12000) = 0xb6929000 <0.000152>
0.011788 close(3) = 0 <0.000075>
0.010144 openat(AT_FDCWD, "/usr/lib/libgstbase-1.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000149>
0.009981 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\20\244\0\0004\0\0\0"..., 512) = 512 <0.000083>
0.010217 fstat64(3, {st_mode=S_IFREG|0755, st_size=375700, ...}) = 0 <0.000073>
0.010125 mmap2(NULL, 440032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb689b000 <0.000104>
0.010882 mprotect(0xb68f6000, 61440, PROT_NONE) = 0 <0.000110>
0.010198 mmap2(0xb6905000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5a000) = 0xb6905000 <0.000149>
0.011807 close(3) = 0 <0.000075>
0.010290 openat(AT_FDCWD, "/usr/lib/libgmodule-2.0.so.0", O_RDONLY|O_CLOEXEC) = 3 <0.000143>
0.009822 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\230\f\0\0004\0\0\0"..., 512) = 512 <0.000081>
0.010205 fstat64(3, {st_mode=S_IFREG|0755, st_size=13764, ...}) = 0 <0.000074>
0.010219 mmap2(NULL, 78056, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6887000 <0.000099>
0.010891 mprotect(0xb6889000, 65536, PROT_NONE) = 0 <0.000106>
0.010105 mmap2(0xb6899000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xb6899000 <0.000229>
0.011760 close(3) = 0 <0.000076>
0.009988 openat(AT_FDCWD, "/lib/librt.so.1", O_RDONLY|O_CLOEXEC) = 3 <0.000160>
0.010017 read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0@\27\0\0004\0\0\0"..., 512) = 512 <0.000092>
0.010371 fstat64(3, {st_mode=S_IFREG|0755, st_size=26520, ...}) = 0 <0.000076>
0.010039 mmap2(NULL, 90640, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb6870000 <0.000113>
0.010881 mprotect(0xb6876000, 61440, PROT_NONE) = 0 <0.000116>
0.010223 mmap2(0xb6885000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5000) = 0xb6885000 <0.000169>
0.011617 close(3) = 0 <0.000073>
0.010093 openat(AT_FDCWD, "/lib/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3 <0.000151>
0.010016 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0l\t\0\0004\0\0\0"..., 512) = 512 <0.000088>
0.010390 fstat64(3, {st_mode=S_IFREG|0755, st_size=9688, ...}) = 0 <0.000075>
0.010039 mmap2(NULL, 73916, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb685d000 <0.000123>
0.010884 mprotect(0xb685f000, 61440, PROT_NONE) = 0 <0.000108>
0.010192 mmap2(0xb686e000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0xb686e000 <0.000152>
0.011636 close(3) = 0 <0.000073>
0.010119 openat(AT_FDCWD, "/usr/lib/libpcre.so.1", O_RDONLY|O_CLOEXEC) = 3 <0.000151>
0.010004 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\10\16\0\0004\0\0\0"..., 512) = 512 <0.000091>
0.010378 fstat64(3, {st_mode=S_IFREG|0755, st_size=263672, ...}) = 0 <0.000075>
0.010090 mmap2(NULL, 327900, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb680c000 <0.000107>
0.010920 mprotect(0xb684c000, 61440, PROT_NONE) = 0 <0.000104>
0.010024 mmap2(0xb685b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3f000) = 0xb685b000 <0.000146>
0.011805 close(3) = 0 <0.000074>
0.010104 openat(AT_FDCWD, "/usr/lib/libffi.so.6", O_RDONLY|O_CLOEXEC) = 3 <0.000143>
0.010024 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\\\23\0\0004\0\0\0"..., 512) = 512 <0.000086>
0.010382 fstat64(3, {st_mode=S_IFREG|0755, st_size=26232, ...}) = 0 <0.000073>
0.010051 mmap2(NULL, 90920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb67f5000 <0.000105>
0.010872 mprotect(0xb67fb000, 61440, PROT_NONE) = 0 <0.000102>
0.010200 mmap2(0xb680a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5000) = 0xb680a000 <0.000148>
0.011641 close(3) = 0 <0.000075>
0.010292 openat(AT_FDCWD, "/lib/libgcc_s.so.1", O_RDONLY|O_CLOEXEC) = 3 <0.000137>
0.009911 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\340\320\0\0004\0\0\0"..., 512) = 512 <0.000086>
0.010385 fstat64(3, {st_mode=S_IFREG|0644, st_size=116300, ...}) = 0 <0.000074>
0.010041 mmap2(NULL, 180524, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb67c8000 <0.000104>
0.010880 mprotect(0xb67e4000, 61440, PROT_NONE) = 0 <0.000118>
0.010201 mmap2(0xb67f3000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b000) = 0xb67f3000 <0.000148>
0.011796 close(3) = 0 <0.000086>
0.010379 mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f98000 <0.000101>
0.010683 set_tls(0xb6f98b20, 0xb6f99218, 0xb6fa5000, 0xb6f98b20, 0xb6fa5000) = 0 <0.000072>
0.010361 mprotect(0xb6ad2000, 8192, PROT_READ) = 0 <0.000142>
0.009734 mprotect(0xb67f3000, 4096, PROT_READ) = 0 <0.000106>
0.010069 mprotect(0xb680a000, 4096, PROT_READ) = 0 <0.000097>
0.010222 mprotect(0xb685b000, 4096, PROT_READ) = 0 <0.000093>
0.010220 mprotect(0xb686e000, 4096, PROT_READ) = 0 <0.000103>
0.010384 mprotect(0xb6afd000, 4096, PROT_READ) = 0 <0.000112>
0.010054 mprotect(0xb6885000, 4096, PROT_READ) = 0 <0.000103>
0.009813 mprotect(0xb6c80000, 4096, PROT_READ) = 0 <0.000100>
0.010081 mprotect(0xb6899000, 4096, PROT_READ) = 0 <0.000098>
0.010369 mprotect(0xb6cd8000, 4096, PROT_READ) = 0 <0.000126>
0.009958 mprotect(0xb6b7e000, 4096, PROT_READ) = 0 <0.000106>
0.010580 mprotect(0xb6df6000, 12288, PROT_READ) = 0 <0.000124>
0.009648 mprotect(0xb6905000, 4096, PROT_READ) = 0 <0.000105>
0.010043 mprotect(0xb6929000, 4096, PROT_READ) = 0 <0.000104>
0.010156 mprotect(0xb6999000, 4096, PROT_READ) = 0 <0.000107>
0.010271 mprotect(0xb6e3f000, 4096, PROT_READ) = 0 <0.000105>
0.010043 mprotect(0xb6eaa000, 8192, PROT_READ) = 0 <0.000106>
0.010246 mprotect(0xb6f2b000, 32768, PROT_READ) = 0 <0.000132>
0.010042 mprotect(0xb6f71000, 8192, PROT_READ) = 0 <0.000108>
0.009957 mprotect(0x26000, 4096, PROT_READ) = 0 <0.000105>
0.010137 mprotect(0xb6fa4000, 4096, PROT_READ) = 0 <0.000107>
0.010023 munmap(0xb6f9c000, 24533) = 0 <0.000165>
0.010125 set_tid_address(0xb6f986c8) = 865 <0.000069>
0.010190 set_robust_list(0xb6f986d0, 12) = 0 <0.000066>
0.010395 rt_sigaction(SIGRTMIN, {sa_handler=0xb6adc24c, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0xb69c8a60}, NULL, 8) = 0 <0.000084>
0.013419 rt_sigaction(SIGRT_1, {sa_handler=0xb6adc308, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0xb69c8a60}, NULL, 8) = 0 <0.000074>
0.014382 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 <0.000067>
0.010288 ugetrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0 <0.000071>
0.011172 brk(NULL) = 0x28000 <0.000079>
0.009511 brk(0x49000) = 0x49000 <0.000099>
0.012309 futex(0xb6c81cac, FUTEX_WAKE_PRIVATE, 2147483647) = 0 <0.000087>
0.008552 futex(0xb6c81cac, FUTEX_WAKE_PRIVATE, 2147483647) = 0 <0.000075>
0.011329 uname({sysname="Linux", nodename="stm32mp1", ...}) = 0 <0.000079>
0.009512 futex(0xb6c81cac, FUTEX_WAKE_PRIVATE, 2147483647) = 0 <0.000084>
0.009496 futex(0xb6c81cac, FUTEX_WAKE_PRIVATE, 2147483647) = 0 <0.000076>
0.010059 futex(0xb6c81cac, FUTEX_WAKE_PRIVATE, 2147483647) = 0 <0.000090>
...
0.000866 poll([{fd=0, events=POLLIN}, {fd=3, events=POLLIN}, {fd=5, events=POLLIN}], 3, 95) = 0 (Timeout) <0.103064>
0.103921 getpid() = 865 <0.000090>
0.001614 getpid() = 865 <0.000104>
0.001243 futex(0xb50715f0, FUTEX_WAKE_PRIVATE, 1) = 1 <0.000108>
) = 29 <0.000213> 290:00:01.7 / 0:00:04.0
0.000921 poll([{fd=0, events=POLLIN}, {fd=3, events=POLLIN}, {fd=5, events=POLLIN}], 3, 94) = 0 (Timeout) <0.102831>
0.103744 getpid() = 865 <0.000117>
0.000806 futex(0xb50715f0, FUTEX_WAKE_PRIVATE, 1) = 1 <0.000129>
0.000953 getpid() = 865 <0.000101>
) = 29 <0.000230> 290:00:01.8 / 0:00:04.0
0.000919 poll([{fd=0, events=POLLIN}, {fd=3, events=POLLIN}, {fd=5, events=POLLIN}], 3, 94) = 0 (Timeout) <0.103294>
0.104092 getpid() = 865 <0.000085>
0.000768 getpid() = 865 <0.000076>
) ) = ? ERESTART_RESTARTBLOCK (Interrupted by signal) <0.028771>
strace: Process 865 detached
6. References[edit source]
- Useful external links
| Document link | Document Type | Description |
|---|---|---|
| strace linux.die.net | Standard | linux.die.net |
| strace wikipedia.org | Standard | wikipedia.org |
| How to use strace | User Guide | go4expert.com |
| strace examples | Training | thegeekstuff.com |