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Calculate branch coverage!

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This commit is contained in:
Ivan Baravy 2020-01-30 04:01:36 +03:00
parent 07ca60a749
commit 6ad7e5d909
1 changed files with 58 additions and 6 deletions
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64
covpreproc.c
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@ -14,7 +14,7 @@ branch branches[MAX_COVERED_CODE_SIZE];
uint32_t coverage_offset, coverage_begin, coverage_end;
void read_coverage_file(const char *fname) {
FILE *f = fopen(fname, "r+");
FILE *f = fopen(fname, "r");
fseeko(f, 0, SEEK_END);
off_t fsize = ftello(f);
fseeko(f, 0, SEEK_SET);
@ -56,6 +56,43 @@ size_t count_block_bytes(FILE *f) {
return cnt;
}
int is_cond_jump(const char *s) {
s += strspn(s, " \t");
int found = !strncasecmp(s, "jo", 2)
|| !strncasecmp(s, "jno", 3)
|| !strncasecmp(s, "js", 2)
|| !strncasecmp(s, "jns", 3)
|| !strncasecmp(s, "je", 2)
|| !strncasecmp(s, "jne", 3)
|| !strncasecmp(s, "jz", 2)
|| !strncasecmp(s, "jnz", 3)
|| !strncasecmp(s, "jb", 2)
|| !strncasecmp(s, "jnb", 3)
|| !strncasecmp(s, "jc", 2)
|| !strncasecmp(s, "jnc", 3)
|| !strncasecmp(s, "jae", 3)
|| !strncasecmp(s, "jnae", 4)
|| !strncasecmp(s, "jbe", 3)
|| !strncasecmp(s, "jna", 3)
|| !strncasecmp(s, "ja", 2)
|| !strncasecmp(s, "jnbe", 4)
|| !strncasecmp(s, "jl", 2)
|| !strncasecmp(s, "jnge", 4)
|| !strncasecmp(s, "jge", 3)
|| !strncasecmp(s, "jnl", 3)
|| !strncasecmp(s, "jle", 3)
|| !strncasecmp(s, "jng", 3)
|| !strncasecmp(s, "jg",2)
|| !strncasecmp(s, "jnle", 4)
|| !strncasecmp(s, "jp", 2)
|| !strncasecmp(s, "jpe", 3)
|| !strncasecmp(s, "jnp", 3)
|| !strncasecmp(s, "jpo", 3)
|| !strncasecmp(s, "jcxz", 4)
|| !strncasecmp(s, "jecxz", 5);
return found;
}
int main(int argc, char **argv) {
if (argc < 6) {
fprintf(stderr, "usage: covpreproc <listing file> <coverage_begin offset> <coverage_begin address> <coverage_end address> <coverage files ...>\n");
@ -71,7 +108,7 @@ int main(int argc, char **argv) {
FILE *f = fopen(argv[1], "r");
char tmp[1024];
uint64_t cur = 0;
uint64_t cur = 0, taken, not_taken;
while (1) {
off_t fpos_before = ftello(f);
if (!fgets(tmp, 1024, f)) {
@ -79,6 +116,7 @@ int main(int argc, char **argv) {
}
off_t fpos_after = ftello(f);
if (strspn(tmp, "0123456789ABCDEF") == 8) {
int is_cond = is_cond_jump(tmp + 64);
fseeko(f, fpos_before, SEEK_SET);
size_t inst_len = count_block_bytes(f);
fseeko(f, fpos_after, SEEK_SET);
@ -89,19 +127,33 @@ int main(int argc, char **argv) {
total_from += branches[pos + i].from_cnt;
}
cur += total_to;
if (is_cond) {
taken = total_from;
not_taken = cur - taken;
if (taken && not_taken) {
putchar(' ');
} else {
putchar('-');
}
} else {
putchar(' ');
}
if (cur) {
putchar(' ');
} else {
putchar('-');
}
if (total_from || total_to || cur) {
printf("%8" PRIu64 " %8" PRIu64 " %8" PRIu64, total_from, total_to, cur);
if (is_cond) {
int spaces = 19 - printf("%10" PRIu64 "/%" PRIu64, taken, not_taken);
while (spaces-- > 0)
putchar(' ');
} else {
printf(" - - -");
printf(" ");
}
printf(" %10" PRIu64, cur);
cur -= total_from;
} else {
printf(" ");
printf(" ");
}
printf(" : %s", tmp + 64);
}