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<p>Hi Paramesh,</p>
<p><br>
</p>
<p>One way to know if your app is really compiled with
-finstrument-functions is doing</p>
<p><br>
</p>
<p>$ objdump -d my_test_app | grep cyg<br>
</p>
<br>
You would typically see something like this: <br>
<br>
0000000000001250 <__cyg_profile_func_enter@plt>:<br>
1250: ff 25 fa 2d 20 00 jmpq *0x202dfa(%rip)
# 204050 <a class="moz-txt-link-rfc2396E" href="mailto:__cyg_profile_func_enter@GLIBC_2.2.5"><__cyg_profile_func_enter@GLIBC_2.2.5></a><br>
0000000000001260 <__cyg_profile_func_exit@plt>:<br>
1260: ff 25 f2 2d 20 00 jmpq *0x202df2(%rip)
# 204058 <a class="moz-txt-link-rfc2396E" href="mailto:__cyg_profile_func_exit@GLIBC_2.2.5"><__cyg_profile_func_exit@GLIBC_2.2.5></a><br>
14a8: e8 a3 fd ff ff callq 1250
<__cyg_profile_func_enter@plt><br>
16d8: e8 83 fb ff ff callq 1260
<__cyg_profile_func_exit@plt><br>
19c5: e8 86 f8 ff ff callq 1250
<__cyg_profile_func_enter@plt><br>
19e2: e9 79 f8 ff ff jmpq 1260
<__cyg_profile_func_exit@plt><br>
1a0d: e8 3e f8 ff ff callq 1250
<__cyg_profile_func_enter@plt><br>
<br>
If you see nothing, as Mathieu said, you can check the individual
make commands and see what flags are being used on the command line.<br>
<br>
Geneviève<br>
<br>
<br>
<div class="moz-cite-prefix">On 2018-07-29 09:29 PM, paramesh p
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOG=51zc2Xu2yNd-3YWhOXZiMb7_c1xYzN_ZS1x+PHP0kRz=LA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div dir="ltr">
<div>
<div>
<div>
<div>
<div>Hi,</div>
<div> I am trying to use Function Tracing for my
application running in 32-bit ARM Platform. I have
added below lines in my makefile for enabling Trace
Data for function tracing </div>
<div><br>
</div>
<div>AM_CFLAGS += -g -O0 -finstrument-functions</div>
<div>AM_CXXFLAGS += -g -O0 -finstrument-functions </div>
<div><br>
</div>
<div>**(My App have both C && CPP files, So I
added CFLAGS & CXXFLAGS). </div>
<div><br>
</div>
<div>I am running below commands,</div>
<div><span style="white-space:pre"> </span>$lttng create
session1</div>
<div><span style="white-space:pre"> </span>$lttng
enable-event -u -a --loglevel-only
TRACE_DEBUG_FUNCTION</div>
<div><span style="white-space:pre"> </span>$lttng start</div>
<div><span style="white-space:pre"> </span>$LD_PRELOAD=liblttng-ust-cyg-profile.so.0.0.0
my_test_app </div>
<div><span style="white-space:pre"> </span>$lttng start</div>
<div><span style="white-space:pre"> </span>$babeltrace
/home/root/lttng-traces/session1</div>
<div><br>
</div>
<div>Its showing nothing.</div>
<div><br>
</div>
<div>I tried with below event-enable command also. There
is no data</div>
<div><span style="white-space:pre"> </span>$lttng
enable-event -u -a --loglevel TRACE_DEBUG_FUNCTION </div>
<div><br>
</div>
<div>But If I use the command, "lttng enable-event -u
-a" for enabling the event, I am getting below output
from babeltrace,</div>
<div><br>
</div>
<div>[22:25:30.812389281] (+?.?????????) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0xAD1A9000, sopath =
"/usr/lib/liblttng-ust-cyg-profile.so.0.0.0", size =
10004, mtime = 1532324280 }</div>
<div>[22:25:30.812496469] (+0.000107188) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DFF0000, sopath = "/usr/lib/xxx.so", size = 19540,
mtime = 1532369202 }</div>
<div>[22:25:30.812604177] (+0.000107708) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4E120000, sopath = "/usr/lib/libcutils.so.0.0.0",
size = 48624, mtime = 1532323462 }</div>
<div>[22:25:30.812655219] (+0.000051042) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DC80000, sopath = "/lib/<a
href="http://libpthread-2.22.so"
moz-do-not-send="true">libpthread-2.22.so</a>", size
= 94976, mtime = 1532322845 }</div>
<div>[22:25:30.812701677] (+0.000046458) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DB20000, sopath = "/lib/<a
href="http://libc-2.22.so" moz-do-not-send="true">libc-2.22.so</a>",
size = 1304484, mtime = 1532322845 }</div>
<div>[22:25:30.812757927] (+0.000056250) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0xAD15B000, sopath = "/usr/lib/liblttng-ust.so.0.0.0",
size = 315248, mtime = 1532324280 }</div>
<div>[22:25:30.812814229] (+0.000056302) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0xAD149000, sopath =
"/usr/lib/liblttng-ust-tracepoint.so.0.0.0", size =
35624, mtime = 1532324280 }</div>
<div>[22:25:30.812860635] (+0.000046406) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DEC0000, sopath = "/lib/<a
href="http://librt-2.22.so" moz-do-not-send="true">librt-2.22.so</a>",
size = 28380, mtime = 1532322845 }</div>
<div>[22:25:30.812904438] (+0.000043803) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DCB0000, sopath = "/lib/<a
href="http://libdl-2.22.so" moz-do-not-send="true">libdl-2.22.so</a>",
size = 11236, mtime = 1532322845 }</div>
<div>[22:25:30.812959125] (+0.000054687) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DE10000, sopath = "/usr/lib/liburcu-bp.so.2.0.0",
size = 29052, mtime = 1532323584 }</div>
<div>[22:25:30.813013969] (+0.000054844) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DE00000, sopath = "/usr/lib/liburcu-cds.so.2.0.0",
size = 26152, mtime = 1532323584 }</div>
<div>[22:25:30.813485479] (+0.000471510) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DD60000, sopath =
"/usr/lib/liburcu-common.so.2.0.0", size = 13084,
mtime = 1532323584 }</div>
<div>[22:25:30.813600792] (+0.000115313) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DAE0000, sopath = "/lib/<a href="http://ld-2.22.so"
moz-do-not-send="true">ld-2.22.so</a>", size =
139632, mtime = 1532322845 }</div>
<div>[22:25:30.813663656] (+0.000062864) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DFC0000, sopath = "/usr/lib/xxx.so.1.0.0", size =
19456, mtime = 1532323510 }</div>
<div>[22:25:30.813720635] (+0.000056979) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4E030000, sopath = "/usr/lib/xxx.so.1.6.0", size =
142164, mtime = 1532323441 }</div>
<div>[22:25:30.813776990] (+0.000056355) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4E060000, sopath = "/usr/lib/xxx.so.0.0.0", size =
265304, mtime = 1532324468 }</div>
<div>[22:25:30.813843917] (+0.000066927) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DEA0000, sopath = "/usr/lib/xxx.so.0.0.0", size =
84016, mtime = 1532324363 }</div>
<div>[22:25:30.813884385] (+0.000040468) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DFE0000, sopath = "/usr/lib/xxx.so", size = 34204,
mtime = 1532324426 }</div>
<div>[22:25:30.813940479] (+0.000056094) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DFD0000, sopath = "/usr/lib/xxx.so", size = 7388,
mtime = 1532324388 }</div>
<div>[22:25:30.813993604] (+0.000053125) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4E000000, sopath = "/usr/lib/xxx.so", size = 33152,
mtime = 1532323414 }</div>
<div>[22:25:30.814049333] (+0.000055729) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DEE0000, sopath = "/usr/lib/libstdc++.so.6.0.20",
size = 869236, mtime = 1532323320 }</div>
<div>[22:25:30.814094177] (+0.000044844) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DCD0000, sopath = "/lib/<a
href="http://libm-2.22.so" moz-do-not-send="true">libm-2.22.so</a>",
size = 441372, mtime = 1532322845 }</div>
<div>[22:25:30.814234177] (+0.000140000) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DE80000, sopath = "/lib/libgcc_s.so.1", size =
118608, mtime = 1532323098 }</div>
<div>[22:25:30.814427615] (+0.000193438) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x8000, sopath = "<span
style="background-color:rgb(255,255,0)">/usr/bin/my_test_app</span>",
size = 54540, mtime = 1532369202 }</div>
<div>[22:25:30.828436677] (+0.014009062) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0xAEC57000, sopath =
"/usr/lib/liblttng-ust-cyg-profile.so.0.0.0", size =
10004, mtime = 1532324280 }</div>
<div>[22:25:30.828634958] (+0.000198281) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr =
0x4DCD0000, sopath = "/lib/<a
href="http://libm-2.22.so" moz-do-not-send="true">libm-2.22.so</a>",
size = 441372, mtime = 1532322845 }</div>
<div>[22:25:30.829786104] (+0.001151146) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0x4DB20000, sopath = "/lib/<a
href="http://libc-2.22.so" moz-do-not-send="true">libc-2.22.so</a>",
size = 1304484, mtime = 1532322845 }</div>
<div>[22:25:30.829910219] (+0.000124115) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0xAEC09000, sopath = "/usr/lib/liblttng-ust.so.0.0.0",
size = 315248, mtime = 1532324280 }</div>
<div>[22:25:30.829996000] (+0.000085781) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0xAEBF7000, sopath =
"/usr/lib/liblttng-ust-tracepoint.so.0.0.0", size =
35624, mtime = 1532324280 }</div>
<div>[22:25:30.830067510] (+0.000071510) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0x4DEC0000, sopath = "/lib/<a
href="http://librt-2.22.so" moz-do-not-send="true">librt-2.22.so</a>",
size = 28380, mtime = 1532322845 }</div>
<div>[22:25:30.830118031] (+0.000050521) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0x4DCB0000, sopath = "/lib/<a
href="http://libdl-2.22.so" moz-do-not-send="true">libdl-2.22.so</a>",
size = 11236, mtime = 1532322845 }</div>
<div>[22:25:30.830175010] (+0.000056979) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0x4DE10000, sopath = "/usr/lib/liburcu-bp.so.2.0.0",
size = 29052, mtime = 1532323584 }</div>
<div>[22:25:30.830245271] (+0.000070261) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0x4DE00000, sopath = "/usr/lib/liburcu-cds.so.2.0.0",
size = 26152, mtime = 1532323584 }</div>
<div>[22:25:30.830316521] (+0.000071250) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr =
0x4DD60000, sopath =
"/usr/lib/liburcu-common.so.2.0.0", size = 13084,
mtime = 1532323584 }</div>
<div>[22:25:34.384458499] (+3.554141978) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0xAF584000, sopath =
"/usr/lib/liblttng-ust-cyg-profile.so.0.0.0", size =
10004, mtime = 1532324280 }</div>
<div>[22:25:34.385048967] (+0.000590468) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0x4DCD0000, sopath = "/lib/<a
href="http://libm-2.22.so" moz-do-not-send="true">libm-2.22.so</a>",
size = 441372, mtime = 1532322845 }</div>
<div>[22:25:34.385146415] (+0.000097448) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0x4DB20000, sopath = "/lib/<a
href="http://libc-2.22.so" moz-do-not-send="true">libc-2.22.so</a>",
size = 1304484, mtime = 1532322845 }</div>
<div>[22:25:34.385251832] (+0.000105417) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0xAF536000, sopath = "/usr/lib/liblttng-ust.so.0.0.0",
size = 315248, mtime = 1532324280 }</div>
<div>[22:25:34.385354228] (+0.000102396) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0xAF524000, sopath =
"/usr/lib/liblttng-ust-tracepoint.so.0.0.0", size =
35624, mtime = 1532324280 }</div>
<div>[22:25:34.385444384] (+0.000090156) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0x4DEC0000, sopath = "/lib/<a
href="http://librt-2.22.so" moz-do-not-send="true">librt-2.22.so</a>",
size = 28380, mtime = 1532322845 }</div>
<div>[22:25:34.385530165] (+0.000085781) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0x4DCB0000, sopath = "/lib/<a
href="http://libdl-2.22.so" moz-do-not-send="true">libdl-2.22.so</a>",
size = 11236, mtime = 1532322845 }</div>
<div>[22:25:34.385607613] (+0.000077448) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0x4DE10000, sopath = "/usr/lib/liburcu-bp.so.2.0.0",
size = 29052, mtime = 1532323584 }</div>
<div>[22:25:34.385677978] (+0.000070365) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0x4DE00000, sopath = "/usr/lib/liburcu-cds.so.2.0.0",
size = 26152, mtime = 1532323584 }</div>
<div>[22:25:34.385773655] (+0.000095677) ZZZ
ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr =
0x4DD60000, sopath =
"/usr/lib/liburcu-common.so.2.0.0", size = 13084,
mtime = 1532323584 }</div>
<div><br>
</div>
<div>Note: I have changed the Target Name as 'ZZZ' and
some of the library name as 'xxx' in the above log for
some confidential issues.</div>
<div><br>
</div>
<div><br>
</div>
<div>Please guide me where I am making mistake and
Please give your input on how to check the application
compiled with function instrument information for
tracing. I verified that application compiled with
debugging information, by running gdb command. Below
is the output of gdb command,</div>
<div><br>
</div>
<div><span style="white-space:pre"> </span>/usr/bin #
gdb <span style="background-color:rgb(255,255,0)">my_test_app</span></div>
<div><span style="white-space:pre"> </span>GNU gdb (GDB)
7.9.1</div>
<div><span style="white-space:pre"> </span>Copyright (C)
2015 Free Software Foundation, Inc.</div>
<div><span style="white-space:pre"> </span>License
GPLv3+: GNU GPL version 3 or later <<a
href="http://gnu.org/licenses/gpl.html"
moz-do-not-send="true">http://gnu.org/licenses/gpl.html</a>></div>
<div><span style="white-space:pre"> </span>This is free
software: you are free to change and redistribute it.</div>
<div><span style="white-space:pre"> </span>There is NO
WARRANTY, to the extent permitted by law. Type "show
copying"</div>
<div><span style="white-space:pre"> </span>and "show
warranty" for details.</div>
<div><span style="white-space:pre"> </span>This GDB was
configured as "arm-oe-linux-gnueabi".</div>
<div><span style="white-space:pre"> </span>Type "show
configuration" for configuration details.</div>
<div><span style="white-space:pre"> </span>For bug
reporting instructions, please see:</div>
<div><span style="white-space:pre"> </span><<a
href="http://www.gnu.org/software/gdb/bugs/"
moz-do-not-send="true">http://www.gnu.org/software/gdb/bugs/</a>>.</div>
<div><span style="white-space:pre"> </span>Find the GDB
manual and other documentation resources online at:</div>
<div><span style="white-space:pre"> </span><<a
href="http://www.gnu.org/software/gdb/documentation/"
moz-do-not-send="true">http://www.gnu.org/software/gdb/documentation/</a>>.</div>
<div><span style="white-space:pre"> </span>For help,
type "help".</div>
<div><span style="white-space:pre"> </span>Type "apropos
word" to search for commands related to "word"...</div>
<div><span style="white-space:pre"> </span>Reading
symbols from <span
style="background-color:rgb(255,255,0)">my_test_app</span>...done.</div>
<div><span style="white-space:pre"> </span>(gdb)</div>
<div><span style="white-space:pre"> </span>(gdb) exit</div>
<div><span style="white-space:pre"> </span></div>
<div>I am not sure whether it is compiled with
finstrumentation information.</div>
<div><br>
</div>
<div>Thanks in Advance,</div>
<div>Paramesh </div>
<div><br>
</div>
<div><br>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
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