I'm interested in profiling the function grep_source_is_binary()[1], whose code goes as following:
static int grep_source_is_binary(struct grep_source *gs,
struct index_state *istate)
{
grep_source_load_driver(gs, istate);
if (gs->driver->binary != -1)
return gs->driver->binary;
if (!grep_source_load(gs))
return buffer_is_binary(gs->buf, gs->size);
return 0;
}
gprof's call graph gives me this information:
0.00 1.58 304254/304254 grep_source_1 [6]
[7] 72.9 0.00 1.58 304254 grep_source_is_binary [7]
0.01 1.20 304254/304254 show_line_header [8]
0.00 0.37 303314/607568 grep_source_load [15]
This seems weird to me, as show_line_header() is not called by grep_source_binary() nor any of its children. Am I misinterpreting gprof's output?
Check if your code is being optimized by the compiler. If yes, then disable it by using -O0.