diff options
Diffstat (limited to 'gcc-4.9/libvtv/scripts/sum-vtv-counts.c')
| -rw-r--r-- | gcc-4.9/libvtv/scripts/sum-vtv-counts.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/gcc-4.9/libvtv/scripts/sum-vtv-counts.c b/gcc-4.9/libvtv/scripts/sum-vtv-counts.c new file mode 100644 index 000000000..fc99498e7 --- /dev/null +++ b/gcc-4.9/libvtv/scripts/sum-vtv-counts.c @@ -0,0 +1,150 @@ +/* +This script sums up the counters for seeing how many virtual calls are +actually being verified. The flag for generating the count data is +"-fvtv-counts". This flag will generate two files in /tmp, +"vtv_count_data.log" and "vtv_class_set_sizes.log". The first file is +the one that contains the info I mentioned; the second one is one I +generated because I was curious about how big the average set size was +for the vtable verification work. + +After compiling the attached program, run it on the vtv_count_data.log +file: + +$ sum-counters /tmp/vtv_count_data.log + +One can optionally pass a "--verbose" flag. This file generates an +output file whose name is the same as the input file, with ".summary" +appended to it, e.g. /tmp/vtv_count_data.log.summary . Without the +verbose flag, it will just contain something like this: + +Total # virtual calls: 349123 +Total # verified calls: 348236 +Percent verified: 99 % + +Total calls to __VLTRegisterSet: 42236 +Total calls to __VLTRegisterPair: 84371 +Total # unused vtable map vars: 1536333 + +With the --verbose flag it will also output one line for each +compilation unit for which it verified less than 90% of the virtual +calls (and there were more than 20 virtual calls in the file), +something like this: + +Verified 1 out of 25 (4.00%) : foo.cc +Verified 27 out of 43 (62.00%) : bar.cc +*/ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +void +usage (const char *error_text) +{ + fprintf (stderr, "%s", error_text); + fprintf (stderr, "Usage: \n"); + fprintf (stderr, "sum-counters <input-file> [--verbose]\n"); +} + +int +main (int argc, char **argv) +{ + FILE *fp_in = NULL; + FILE *fp_out = NULL; + int sum_vcalls = 0; + int sum_verified = 0; + int sum_regset = 0; + int sum_regpair = 0; + int sum_unused = 0; + char fname_in[1024]; + char fname_out[1024]; + int total; + int verified; + int regset; + int regpair; + int unused; + float pct; + char buffer[1024]; + int verbose = 0; + + if (argc < 2) + { + usage ("Error: Need an input file.\n"); + return 1; + } + + fp_in = fopen (argv[1], "r"); + if (!fp_in) + { + snprintf (buffer, 1024, "Error: Unable to open input file '%s'.\n", + argv[1]); + usage (buffer); + return 1; + } + + if (argc == 3) + { + if (strcmp (argv[2], "--verbose") == 0) + verbose = 1; + else + { + snprintf (buffer, 1024, "Error: Unrecognized option '%s'.\n", + argv[2]); + usage (buffer); + return 1; + } + } + + snprintf (fname_out, 1024, "%s.summary", argv[1]); + + fp_out = fopen (fname_out, "w"); + if (!fp_out) + { + fprintf (stderr, "Error: Unable to open output file '%s'\n", + fname_out); + return 1; + } + + while (fscanf (fp_in, "%s %d %d %d %d %d\n", fname_in, &total, + &verified, ®set, ®pair, &unused) != EOF) + { + sum_vcalls += total; + sum_verified += verified; + sum_regset += regset; + sum_regpair += regpair; + sum_unused += unused; + + float tmp_pct = 0.0; + + if (total > 0) + tmp_pct = (verified * 100) / total; + + if (verbose && tmp_pct < 90 && total >= 20) + { + fprintf (fp_out, "Verified %d out of %d (%.2f%%) : %s\n", + verified, total, tmp_pct, fname_in); + } + + } + + fclose (fp_in); + + fprintf (fp_out, "\n\n"); + fprintf (fp_out, "Total # virtual calls: %d\n", sum_vcalls); + fprintf (fp_out, "Total # verified calls: %d\n", sum_verified); + if (sum_vcalls > 0) + fprintf (fp_out, "Percent verified: %d %%\n", + sum_verified * 100 / sum_vcalls); + else + fprintf (fp_out, "Percent verified: NA %%\n"); + + fprintf (fp_out, "\nTotal calls to __VLTRegisterSet: %d\n", + sum_regset); + fprintf (fp_out, "Total calls to __VLTRegisterPair: %d\n", + sum_regpair); + fprintf (fp_out, "Total # unused vtable map vars: %d\n", sum_unused); + + fclose (fp_out); + + return 0; +} |