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Optimize cen64-profile2callgrind, 100x faster when not repeatedly calling addr2line

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This commit is contained in:
Lauri Kasanen 2018-12-16 20:53:36 +02:00
parent 9812f78917
commit 123cf2f76a
1 changed files with 70 additions and 27 deletions
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97
util/cen64-profile2callgrind.cpp
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@ -8,7 +8,8 @@
// 'LICENSE', which is part of this source code package.
//
#define PACKAGE "" // work around bfd.h requirement
#include <bfd.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
@ -29,6 +30,35 @@ static void die(const char fmt[], ...) {
exit(1);
}
static asymbol **syms = NULL;
static uint32_t num_syms = 0;
static bool found;
static const char *filename, *funcname;
static unsigned lineno, discriminator;
static void findsym(bfd *bin, asection *section, void *addrv) {
bfd_vma vma;
bfd_size_type size;
if (found)
return;
if ((bfd_get_section_flags(bin, section) & SEC_ALLOC) == 0)
return;
vma = bfd_get_section_vma(bin, section);
const uint32_t addr = *(uint32_t *) addrv;
if (addr < vma)
return;
size = bfd_get_section_size(section);
if (addr >= vma + size)
return;
found = bfd_find_nearest_line_discriminator(bin, section, syms, addr - vma,
&filename, &funcname,
&lineno, &discriminator);
}
int main(int argc, char **argv) {
string s;
@ -39,6 +69,23 @@ int main(int argc, char **argv) {
die("Usage: %s my.z64.profile my.elf\n", argv[0]);
}
bfd_init();
//bfd_set_default_target("elf32-big");
bfd *bin = bfd_openr(argv[2], NULL);
if (!bin) die("Failed to open elf file\n");
bin->flags |= BFD_DECOMPRESS;
if (bfd_check_format(bin, bfd_archive) ||
!bfd_check_format_matches(bin, bfd_object, NULL))
die("Unable to get addresses from elf file\n");
const uint32_t storage = bfd_get_symtab_upper_bound(bin);
if (storage) {
syms = (asymbol **) malloc(storage);
num_syms = bfd_canonicalize_symtab(bin, syms);
}
s = "nm ";
s += argv[2];
s += " | grep -i \" t \"";
@ -101,41 +148,37 @@ int main(int argc, char **argv) {
summary += num;
char *ptr = strchr(buf, ' ');
*ptr = '\0';
found = false;
bfd_map_over_sections(bin, findsym, &addr);
s = "addr2line -s -e ";
s += argv[2];
s += " ";
s += buf;
if (found) {
const char *ptr = filename ? strrchr(filename, '/') : NULL;
if (ptr) {
ptr++;
fprintf(out, "fl=%s\n", ptr);
} else {
fprintf(out, "fl=??\n");
}
char linebuf[PATH_MAX];
FILE *p = popen(s.c_str(), "r");
if (!fgets(linebuf, PATH_MAX, p))
die("Failed getting addr\n");
pclose(p);
fprintf(out, "fn=%s\n", funcname);
fprintf(out, "%u %lu\n\n", lineno, num);
} else {
fprintf(out, "fl=??\n");
map<uint32_t, string>::const_iterator it = funcs.lower_bound(addr);
it--;
fprintf(out, "fn=%s\n", it->second.c_str());
ptr = strchr(linebuf, ':');
*ptr = '\0';
ptr++;
uint32_t line = 0;
if (*ptr != '?' && sscanf(ptr, "%u", &line) != 1)
die("Failed getting addr\n");
// Okay, we have everything for this sample. Put it out
fprintf(out, "fl=%s\n", linebuf);
map<uint32_t, string>::const_iterator it = funcs.lower_bound(addr);
it--;
fprintf(out, "fn=%s\n", it->second.c_str());
fprintf(out, "%u %lu\n\n", line, num);
fprintf(out, "0 %lu\n\n", num);
}
}
bfd_close(bin);
fprintf(out, "totals: %lu\n", summary);
fclose(f);
fclose(out);
free(syms);
return 0;
}