https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89000
Bug ID: 89000
Summary: gcov --function-summaries says No branches/No calls,
only the File summary is correct
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: steven.w.carmer at lmco dot com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
gcc -v output
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/appl/lucy_local_sde/Linux-RHEL7-x86_64/gcc-8.2.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/8.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/appl/lucy_local_sde/src/gcc/gcc-8.2.0/x86_64-Linux-3.10/gcc-8.2.0-obj/../gcc-8.2.0/configure
--prefix=/usr/local/sde/gcc-8.2.0 --disable-nls --enable-shared --enable-static
--enable-multilib --with-multilib-list=m32,m64 --enable-languages=c,c++,fortran
Thread model: posix
gcc version 8.2.0 (GCC)
When using the -f (--function-summaries) option with gcov, it does not provide
the branch/call statistics for the functions. The file summary is correct, and
the *gcov output file that gets created shows it has the branch/call
information that the -f option relies upon, but the gcov -f output just shows
"No branches/No calls" for all the function summaries.
A trivial example source code file gcov_test.c that produces these results:
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
void foo(void);
void foo(void)
{
static bool firstPass = true;
if (firstPass)
{
firstPass = false;
printf ("First Pass\n");
}
else
{
printf ("Not First Pass\n");
}
}
int main (int argc, char *argv[])
{
foo();
foo();
foo();
return 0;
}
Compile that C file with the following:
gcc -fprofile-arcs -ftest-coverage gcov_test.c
Run the executable to produce the gcov artifacts
./a.out
And then run the following to view the coverage report
gcov -b gcov_test.c -f
Function 'main'
Lines executed:100.00% of 5
No branches
No calls
Function 'foo'
Lines executed:100.00% of 6
No branches
No calls
File 'gcov_test.c'
Lines executed:100.00% of 11
Branches executed:100.00% of 2
Taken at least once:100.00% of 2
Calls executed:100.00% of 5
Creating 'gcov_test.c.gcov'
Note the "No branches" and "No calls" output. With gcc/gcov 7.4 (and older),
the output looks like this:
Function 'main'
Lines executed:100.00% of 5
No branches
Calls executed:100.00% of 3
Function 'foo'
Lines executed:100.00% of 6
Branches executed:100.00% of 2
Taken at least once:100.00% of 2
Calls executed:100.00% of 2
File 'gcov_test.c'
Lines executed:100.00% of 11
Branches executed:100.00% of 2
Taken at least once:100.00% of 2
Calls executed:100.00% of 5
Creating 'gcov_test.c.gcov'
