On Wed, Feb 18, 2015 at 10:44:27AM +0100, Josef Weidendorfer wrote: > Am 17.02.2015 um 21:22 schrieb Raul Garcia: > > I am a new user, I am doing a "hello world" test of Valgrind but i keep > > hitting this error: > > ... > > 2,709 *???*:getenv [/home/otro/arm_emulator/hello_x86] > > The "???" are not really any errors, but a sign that for these functions, > valgrind could not locate debug information providing a source file name. > > > This is the command that I used, as you can see I used -g and -O0 > > options as suggested. > > > > $ gcc -static -g -O0 hello.c -o hello_x86 > > getenv above is from glibc, and you seem not to have debug information > installed for the statically linkable glibc. > "-O0" or "-g" does not help here, because the issue is with an already > compiled library. > Does it work if you remove "-static"? I have no idea if Ubuntu provides > debug info for libc.a ...
Debian do provides, so I guess that ubuntu too: libc6-dev: /usr/lib/x86_64-linux-gnu/libc.a > > > But when I try to see the analysis with callgrind I get: > > > > Ir > > -------------------------------------------------------------------------------- > > 11,737 PROGRAM TOTALS > > > > -------------------------------------------------------------------------------- > > Ir file:function > > -------------------------------------------------------------------------------- > > 2,709 ???:getenv [/home/otro/arm_emulator/hello_x86] > > 1,133 ???:_int_malloc [/home/otro/arm_emulator/hello_x86] > > 813 ???:intel_check_word [/home/otro/arm_emulator/hello_x86] > > 792 ???:malloc_consolidate [/home/otro/arm_emulator/hello_x86] > > 783 ???:_IO_file_overflow [/home/otro/arm_emulator/hello_x86] > > 555 ???:strncmp [/home/otro/arm_emulator/hello_x86] > > 435 ???:ptmalloc_init.part.7 [/home/otro/arm_emulator/hello_x86] > > 361 ???:(below main) [/home/otro/arm_emulator/hello_x86] > > 342 ???:_IO_default_xsputn [/home/otro/arm_emulator/hello_x86] > > 311 ???:_dl_init_paths [/home/otro/arm_emulator/hello_x86] > > > > And I cant see the cost of the functions . What can be the problem? Some > > logs are attached, i hope they are helpful. > > Self cost is there. > To see inclusive costs, you need to use "callgrind_annotate > --inclusive=yes ...". > And "--tree=both" shows a butterfly output of the call graph. > > I would suggest do use kcachegrind/qcachegrind to visualize callgrind > results. > > Josef ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
