#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef _WIN32
#include <direct.h>
#endif
#ifndef _MSC_VER
#include <stdint.h>
#else
typedef unsigned int uint32_t;
typedef unsigned int uint64_t;
#endif
static FILE *output_file = NULL;
static void write_int32(uint32_t i) {
fwrite(&i, 4, 1, output_file);
}
static void write_int64(uint64_t i) {
uint32_t lo = i >> 0;
uint32_t hi = i >> 32;
write_int32(lo);
write_int32(hi);
}
static uint32_t length_of_string(const char *s) {
return (strlen(s) / 4) + 1;
}
static void write_string(const char *s) {
uint32_t len = length_of_string(s);
write_int32(len);
fwrite(s, strlen(s), 1, output_file);
fwrite("\0\0\0\0", 4 - (strlen(s) % 4), 1, output_file);
}
static uint32_t read_int32() {
uint32_t tmp;
if (fread(&tmp, 1, 4, output_file) != 4)
return (uint32_t)-1;
return tmp;
}
static uint64_t read_int64() {
uint64_t tmp;
if (fread(&tmp, 1, 8, output_file) != 8)
return (uint64_t)-1;
return tmp;
}
static char *mangle_filename(const char *orig_filename) {
char *filename = 0;
int prefix_len = 0;
int prefix_strip = 0;
int level = 0;
const char *fname = orig_filename, *ptr = NULL;
const char *prefix = getenv("GCOV_PREFIX");
const char *tmp = getenv("GCOV_PREFIX_STRIP");
if (!prefix)
return strdup(orig_filename);
if (tmp) {
prefix_strip = atoi(tmp);
if (prefix_strip < 0)
prefix_strip = 0;
}
prefix_len = strlen(prefix);
filename = malloc(prefix_len + 1 + strlen(orig_filename) + 1);
strcpy(filename, prefix);
if (prefix[prefix_len - 1] != '/')
strcat(filename, "/");
for (ptr = fname + 1; *ptr != '\0' && level < prefix_strip; ++ptr) {
if (*ptr != '/') continue;
fname = ptr;
++level;
}
strcat(filename, fname);
return filename;
}
static void recursive_mkdir(char *filename) {
int i;
for (i = 1; filename[i] != '\0'; ++i) {
if (filename[i] != '/') continue;
filename[i] = '\0';
#ifdef _WIN32
_mkdir(filename);
#else
mkdir(filename, 0755);
#endif
filename[i] = '/';
}
}
void llvm_gcda_start_file(const char *orig_filename) {
char *filename = mangle_filename(orig_filename);
output_file = fopen(filename, "r+b");
if (!output_file) {
output_file = fopen(filename, "w+b");
if (!output_file) {
recursive_mkdir(filename);
output_file = fopen(filename, "w+b");
if (!output_file) {
fprintf(stderr, "profiling:%s: cannot open\n", filename);
free(filename);
return;
}
}
}
#ifdef __APPLE__
fwrite("adcg*204MVLL", 12, 1, output_file);
#else
fwrite("adcg*404MVLL", 12, 1, output_file);
#endif
free(filename);
#ifdef DEBUG_GCDAPROFILING
fprintf(stderr, "llvmgcda: [%s]\n", orig_filename);
#endif
}
void llvm_gcda_increment_indirect_counter(uint32_t *predecessor,
uint64_t **counters) {
uint64_t *counter;
uint32_t pred;
pred = *predecessor;
if (pred == 0xffffffff)
return;
counter = counters[pred];
if (counter)
++*counter;
#ifdef DEBUG_GCDAPROFILING
else
fprintf(stderr,
"llvmgcda: increment_indirect_counter counters=%08llx, pred=%u\n",
*counter, *predecessor);
#endif
}
void llvm_gcda_emit_function(uint32_t ident, const char *function_name) {
#ifdef DEBUG_GCDAPROFILING
fprintf(stderr, "llvmgcda: function id=0x%08x\n", ident);
#endif
if (!output_file) return;
fwrite("\0\0\0\1", 4, 1, output_file);
write_int32(3 + 1 + length_of_string(function_name));
write_int32(ident);
write_int32(0);
write_int32(0);
write_string(function_name);
}
void llvm_gcda_emit_arcs(uint32_t num_counters, uint64_t *counters) {
uint32_t i;
uint64_t *old_ctrs = NULL;
uint32_t val = 0;
long pos = 0;
if (!output_file) return;
pos = ftell(output_file);
val = read_int32();
if (val != (uint32_t)-1) {
uint32_t j;
if (val != 0x01a10000) {
fprintf(stderr, "profiling: invalid magic number (0x%08x)\n", val);
return;
}
val = read_int32();
if (val == (uint32_t)-1 || val / 2 != num_counters) {
fprintf(stderr, "profiling: invalid number of counters (%d)\n", val);
return;
}
old_ctrs = malloc(sizeof(uint64_t) * num_counters);
for (j = 0; j < num_counters; ++j)
old_ctrs[j] = read_int64();
}
fseek(output_file, pos, SEEK_SET);
fwrite("\0\0\xa1\1", 4, 1, output_file);
write_int32(num_counters * 2);
for (i = 0; i < num_counters; ++i)
write_int64(counters[i] + (old_ctrs ? old_ctrs[i] : 0));
free(old_ctrs);
#ifdef DEBUG_GCDAPROFILING
fprintf(stderr, "llvmgcda: %u arcs\n", num_counters);
for (i = 0; i < num_counters; ++i)
fprintf(stderr, "llvmgcda: %llu\n", (unsigned long long)counters[i]);
#endif
}
void llvm_gcda_end_file() {
if (!output_file) return;
fwrite("\0\0\0\0\0\0\0\0", 8, 1, output_file);
fclose(output_file);
output_file = NULL;
#ifdef DEBUG_GCDAPROFILING
fprintf(stderr, "llvmgcda: -----\n");
#endif
}