Sorry for the delayed response,@Mathieu,I have attached the build log. The Project I am working is Yocto Project based build system. My App uses the shared object "libhw.so". So, it built first. As I said before,below are the flag I addedAM_CFLAGS += -g -O0 -finstrument-functionsAM_CXXFLAGS += -g -O0 -finstrument-functionsFrom the log I found that "-finstrument-functions" flag included in compiling all the source files, ' libhw.la' file and 'my_test_app' binary, but not included for compiling 'libhw.so'. I am not sure why? My question is, as you see my shared object and binary includes following so's "libtinyalsa.so libexpat.so libbinder.so libutils.so libhwwrapper.so libhardware.so libcutils.so liblog.so". Are all these need to be compiled with finstrument flag. In that case, it will increase my workload, since some of them are custom build and some from the libs and each of them might have their own dependents.@gen,objdump doesn't support arm architecture. So, I used "arm-linux-gnueabi-objdump" tool. I could see cyg information to all my object files but I could not see for "libhw.so" and "my_test_app" files.cyg information of one of my source file,$ arm-linux-gnueabi-objdump -d libhw_la-hw_api.o | grep cyg20: ebfffffe bl 0 <__cyg_profile_func_enter>30: eafffffe b 0 <__cyg_profile_func_exit>64: ebfffffe bl 0 <__cyg_profile_func_enter>a4: ebfffffe bl 0 <__cyg_profile_func_exit>..........................................2548: ebfffffe bl 0 <__cyg_profile_func_exit>258c: ebfffffe bl 0 <__cyg_profile_func_enter>25d0: ebfffffe bl 0 <__cyg_profile_func_exit>25e8: ebfffffe bl 0 <__cyg_profile_func_exit>Please help me.Thanks in Advance,ParameshOn Mon, Jul 30, 2018 at 6:50 AM, Geneviève Bastien <gbastien@versatic.net> wrote:Hi Paramesh,
One way to know if your app is really compiled with -finstrument-functions is doing
$ objdump -d my_test_app | grep cyg
You would typically see something like this:
0000000000001250 <__cyg_profile_func_enter@plt>:
1250: ff 25 fa 2d 20 00 jmpq *0x202dfa(%rip) # 204050 <__cyg_profile_func_enter@GLIBC_2.2.5>
0000000000001260 <__cyg_profile_func_exit@plt>:
1260: ff 25 f2 2d 20 00 jmpq *0x202df2(%rip) # 204058 <__cyg_profile_func_exit@GLIBC_2.2.5>
14a8: e8 a3 fd ff ff callq 1250 <__cyg_profile_func_enter@plt>
16d8: e8 83 fb ff ff callq 1260 <__cyg_profile_func_exit@plt>
19c5: e8 86 f8 ff ff callq 1250 <__cyg_profile_func_enter@plt>
19e2: e9 79 f8 ff ff jmpq 1260 <__cyg_profile_func_exit@plt>
1a0d: e8 3e f8 ff ff callq 1250 <__cyg_profile_func_enter@plt>
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.
Geneviève
On 2018-07-29 09:29 PM, paramesh p wrote:
Hi,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
AM_CFLAGS += -g -O0 -finstrument-functionsAM_CXXFLAGS += -g -O0 -finstrument-functions
**(My App have both C && CPP files, So I added CFLAGS & CXXFLAGS).
I am running below commands,$lttng create session1$lttng enable-event -u -a --loglevel-only TRACE_DEBUG_FUNCTION$lttng start$LD_PRELOAD=liblttng-ust-cyg-profile.so.0.0.0 my_test_app $lttng start$babeltrace /home/root/lttng-traces/session1
Its showing nothing.
I tried with below event-enable command also. There is no data$lttng enable-event -u -a --loglevel TRACE_DEBUG_FUNCTION
But If I use the command, "lttng enable-event -u -a" for enabling the event, I am getting below output from babeltrace,
[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 } [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 }[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 }[22:25:30.812655219] (+0.000051042) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x4DC80000, sopath = "/lib/libpthread-2.22.so", size = 94976, mtime = 1532322845 }[22:25:30.812701677] (+0.000046458) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x4DB20000, sopath = "/lib/libc-2.22.so", size = 1304484, mtime = 1532322845 }[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 } [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 } [22:25:30.812860635] (+0.000046406) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x4DEC0000, sopath = "/lib/librt-2.22.so", size = 28380, mtime = 1532322845 }[22:25:30.812904438] (+0.000043803) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x4DCB0000, sopath = "/lib/libdl-2.22.so", size = 11236, mtime = 1532322845 }[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 } [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 } [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 } [22:25:30.813600792] (+0.000115313) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x4DAE0000, sopath = "/lib/ld-2.22.so", size = 139632, mtime = 1532322845 }[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 }[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 }[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 }[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 }[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 }[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 }[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 }[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 } [22:25:30.814094177] (+0.000044844) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x4DCD0000, sopath = "/lib/libm-2.22.so", size = 441372, mtime = 1532322845 }[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 }[22:25:30.814427615] (+0.000193438) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x8000, sopath = "/usr/bin/my_test_app", size = 54540, mtime = 1532369202 }[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 } [22:25:30.828634958] (+0.000198281) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 1 }, { baddr = 0x4DCD0000, sopath = "/lib/libm-2.22.so", size = 441372, mtime = 1532322845 }[22:25:30.829786104] (+0.001151146) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr = 0x4DB20000, sopath = "/lib/libc-2.22.so", size = 1304484, mtime = 1532322845 }[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 } [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 } [22:25:30.830067510] (+0.000071510) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr = 0x4DEC0000, sopath = "/lib/librt-2.22.so", size = 28380, mtime = 1532322845 }[22:25:30.830118031] (+0.000050521) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 0 }, { baddr = 0x4DCB0000, sopath = "/lib/libdl-2.22.so", size = 11236, mtime = 1532322845 }[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 } [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 } [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 } [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 } [22:25:34.385048967] (+0.000590468) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr = 0x4DCD0000, sopath = "/lib/libm-2.22.so", size = 441372, mtime = 1532322845 }[22:25:34.385146415] (+0.000097448) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr = 0x4DB20000, sopath = "/lib/libc-2.22.so", size = 1304484, mtime = 1532322845 }[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 } [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 } [22:25:34.385444384] (+0.000090156) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr = 0x4DEC0000, sopath = "/lib/librt-2.22.so", size = 28380, mtime = 1532322845 }[22:25:34.385530165] (+0.000085781) ZZZ ust_baddr_statedump:soinfo: { cpu_id = 2 }, { baddr = 0x4DCB0000, sopath = "/lib/libdl-2.22.so", size = 11236, mtime = 1532322845 }[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 } [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 } [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 }
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.
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,
/usr/bin # gdb my_test_appGNU gdb (GDB) 7.9.1Copyright (C) 2015 Free Software Foundation, Inc.License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html >This is free software: you are free to change and redistribute it.There is NO WARRANTY, to the extent permitted by law. Type "show copying"and "show warranty" for details.This GDB was configured as "arm-oe-linux-gnueabi".Type "show configuration" for configuration details.For bug reporting instructions, please see:Find the GDB manual and other documentation resources online at:For help, type "help".Type "apropos word" to search for commands related to "word"...Reading symbols from my_test_app...done.(gdb)(gdb) exitI am not sure whether it is compiled with finstrumentation information.
Thanks in Advance,Paramesh
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