Source line numbers in perf call graph?

Question

I'm using perf record -a --call-graph dwarf -p XXX sleep 1 to record some function calls then perf report to view that data, however it would be very helpful if I could also see source line numbers to know exactly where each function call was made. For example:

-   4.18%  testbinary  testbinary                [.] malloc 
   - malloc 
      - 99.57% operator new(unsigned long)
         + 7.28% MyFunction()

I want to know where exactly in MyFunction() are those new operators called (without me guessing by looking at the whole function source code)

P.S.: Binary is compiled with -m64 -O2 -ggdb3

Answer 1

I accidentally found it loosely documented in perf script, but it applies to other commands as well: -F option accepts srcline. So you can do -F+srcline to add the line number to existing columns.

Example: perf report -g fractal -F+period,srcline

Samples: 22K of event 'cycles:u', Event count (approx.): 13031011295
  Children      Self        Period  Source:Line                           Command  Shared Object        Symbol
+   99.98%    38.76%    5051224000  test.cpp:7                            a        a                    [.] fib
+   96.42%     0.00%             0  _start+94372992700461                 a        a                    [.] _start
+   96.42%     0.00%             0  __libc_start_main+140304673091826     a        libc-2.29.so         [.] __libc_start_main
+   96.42%     0.00%             0  test.cpp:13                           a        a                    [.] main
+   21.47%    21.47%    2797741850  test.cpp:8                            a        a                    [.] fib
+   16.69%    16.69%    2174469736  test.cpp:4                            a        a                    [.] fib
+   16.37%    16.36%    2132462705  test.cpp:6                            a        a                    [.] fib
+    6.69%     6.69%     871128215  test.cpp:5                            a        a                    [.] fib