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/* error.c
* (c) 2002 Mikulas Patocka
* This file is a part of the Links program, released under GPL.
*/
#include "links.h"
#if DEBUGLEVEL >= 2
#define RED_ZONE 'R'
#endif
#if DEBUGLEVEL >= 3
#define FREE_FILL 0xfe
#define REALLOC_FILL 0xfd
#define ALLOC_FILL 0xfc
#endif
#if DEBUGLEVEL < 0
#define FREE_FILL 0xfe
#endif
#if DEBUGLEVEL < 0
#define NO_IE
#endif
#ifdef RED_ZONE
#define RED_ZONE_INC 1
#else
#define RED_ZONE_INC 0
#endif
volatile char dummy_val;
volatile char * volatile dummy_ptr = &dummy_val;
volatile char * volatile x_ptr;
void *do_not_optimize_here(void *p)
{
/* break ANSI aliasing */
x_ptr = p;
*dummy_ptr = 0;
return p;
}
#ifdef LEAK_DEBUG
unsigned long mem_amount = 0;
unsigned long mem_blocks = 0;
#define ALLOC_MAGIC 0xa110c
#define ALLOC_FREE_MAGIC 0xf4ee
#define ALLOC_REALLOC_MAGIC 0x4ea110c
#ifndef LEAK_DEBUG_LIST
struct alloc_header {
int magic;
size_t size;
};
#else
struct alloc_header {
struct alloc_header *next;
struct alloc_header *prev;
size_t size;
int magic;
int line;
unsigned char *file;
unsigned char *comment;
};
static struct list_head memory_list = { &memory_list, &memory_list };
#endif
#define L_D_S ((sizeof(struct alloc_header) + 15) & ~15)
#endif
static inline void force_dump(void)
{
int rs;
fprintf(stderr, "\n\033[1m%s\033[0m\n", "Forcing core dump");
fflush(stdout);
fflush(stderr);
fatal_tty_exit();
EINTRLOOP(rs, raise(SIGSEGV));
}
void check_memory_leaks(void)
{
#if defined(NO_IE)
return;
#else
#ifdef LEAK_DEBUG
if (mem_amount || mem_blocks) {
fprintf(stderr, "\n\033[1mMemory leak by %lu bytes (%lu blocks)\033[0m\n", mem_amount, mem_blocks);
#ifdef LEAK_DEBUG_LIST
fprintf(stderr, "\nList of blocks: ");
{
int r = 0;
struct alloc_header *ah;
foreach (ah, memory_list) {
fprintf(stderr, "%s%p:%lu @ %s:%d", r ? ", ": "", (unsigned char *)ah + L_D_S, (unsigned long)ah->size, ah->file, ah->line), r = 1;
if (ah->comment) fprintf(stderr, ":\"%s\"", ah->comment);
}
fprintf(stderr, "\n");
}
#endif
force_dump();
}
#endif
#endif
}
static void er(int b, char *m, va_list l)
{
if (b) fprintf(stderr, "%c", (unsigned char)7);
#ifdef HAVE_VPRINTF
vfprintf(stderr, cast_const_char m, l);
#else
fprintf(stderr, "%s", m);
#endif
fprintf(stderr, "\n");
fflush(stderr);
sleep(1);
}
void error(char *m, ...)
{
va_list l;
va_start(l, m);
fprintf(stderr, "\n");
er(1, m, l);
va_end(l);
}
void fatal_exit(char *m, ...)
{
va_list l;
va_start(l, m);
fprintf(stderr, "\n");
er(1, m, l);
va_end(l);
fatal_tty_exit();
exit(RET_FATAL);
}
int errline;
unsigned char *errfile;
static unsigned char errbuf[4096];
void int_error(char *m, ...)
{
#ifdef NO_IE
return;
#else
va_list l;
va_start(l, m);
sprintf(cast_char errbuf, "\n\033[1mINTERNAL ERROR\033[0m at %s:%d: ", errfile, errline);
strcat(cast_char errbuf, cast_const_char m);
er(1, cast_char errbuf, l);
force_dump();
va_end(l);
#endif
}
void debug_msg(char *m, ...)
{
va_list l;
va_start(l, m);
sprintf(cast_char errbuf, "\nDEBUG MESSAGE at %s:%d: ", errfile, errline);
strcat(cast_char errbuf, cast_const_char m);
er(0, cast_char errbuf, l);
va_end(l);
}
#ifdef LEAK_DEBUG
void *debug_mem_alloc(unsigned char *file, int line, size_t size, int mayfail)
{
void *p;
#ifdef LEAK_DEBUG
struct alloc_header *ah;
#endif
debug_test_free(file, line);
if (!size) return DUMMY;
if (size > MAXINT) {
if (mayfail) return NULL;
overalloc();
}
#ifdef LEAK_DEBUG
mem_amount += size;
mem_blocks++;
size += L_D_S;
#endif
retry:
if (!(p = malloc(size + RED_ZONE_INC))) {
if (out_of_memory(0, !mayfail ? cast_uchar "malloc" : NULL, size + RED_ZONE_INC)) goto retry;
#ifdef LEAK_DEBUG
mem_amount -= (size - L_D_S);
mem_blocks--;
#endif
return NULL;
}
#ifdef RED_ZONE
*((unsigned char *)p + size + RED_ZONE_INC - 1) = RED_ZONE;
#endif
#ifdef LEAK_DEBUG
ah = p;
p = (unsigned char *)p + L_D_S;
ah->size = size - L_D_S;
ah->magic = ALLOC_MAGIC;
#ifdef LEAK_DEBUG_LIST
ah->file = file;
ah->line = line;
ah->comment = NULL;
add_to_list(memory_list, ah);
#endif
#endif
#ifdef ALLOC_FILL
memset(p, ALLOC_FILL, size - L_D_S);
#endif
return p;
}
void *debug_mem_calloc(unsigned char *file, int line, size_t size, int mayfail)
{
void *p;
#ifdef LEAK_DEBUG
struct alloc_header *ah;
#endif
debug_test_free(file, line);
if (!size) return DUMMY;
if (size > MAXINT) {
if (mayfail) return NULL;
overalloc();
}
#ifdef LEAK_DEBUG
mem_amount += size;
mem_blocks++;
size += L_D_S;
#endif
retry:
if (!(p = x_calloc(size + RED_ZONE_INC))) {
if (out_of_memory(0, !mayfail ? cast_uchar "calloc" : NULL, size + RED_ZONE_INC)) goto retry;
#ifdef LEAK_DEBUG
mem_amount -= (size - L_D_S);
mem_blocks--;
#endif
return NULL;
}
#ifdef RED_ZONE
*((unsigned char *)p + size + RED_ZONE_INC - 1) = RED_ZONE;
#endif
#ifdef LEAK_DEBUG
ah = p;
p = (unsigned char *)p + L_D_S;
ah->size = size - L_D_S;
ah->magic = ALLOC_MAGIC;
#ifdef LEAK_DEBUG_LIST
ah->file = file;
ah->line = line;
ah->comment = NULL;
add_to_list(memory_list, ah);
#endif
#endif
return p;
}
void debug_mem_free(unsigned char *file, int line, void *p)
{
#ifdef LEAK_DEBUG
struct alloc_header *ah;
#endif
if (p == DUMMY) return;
if (!p) {
errfile = file, errline = line, int_error("mem_free(NULL)");
return;
}
#ifdef LEAK_DEBUG
p = (unsigned char *)p - L_D_S;
ah = p;
if (ah->magic != ALLOC_MAGIC) {
errfile = file, errline = line, int_error("mem_free: magic doesn't match: %08x", ah->magic);
return;
}
#ifdef FREE_FILL
memset((unsigned char *)p + L_D_S, FREE_FILL, ah->size);
#endif
ah->magic = ALLOC_FREE_MAGIC;
#ifdef LEAK_DEBUG_LIST
del_from_list(ah);
if (ah->comment) free(ah->comment);
#endif
mem_amount -= ah->size;
mem_blocks--;
#endif
#ifdef RED_ZONE
if (*((unsigned char *)p + L_D_S + ah->size + RED_ZONE_INC - 1) != RED_ZONE) {
errfile = file, errline = line, int_error("mem_free: red zone damaged: %02x (block allocated at %s:%d%s%s)", *((unsigned char *)p + L_D_S + ah->size + RED_ZONE_INC - 1),
#ifdef LEAK_DEBUG_LIST
ah->file, ah->line, ah->comment ? ":" : "", ah->comment ? ah->comment : (unsigned char *)"");
#else
"-", 0, "-");
#endif
return;
}
#endif
free(p);
}
void *debug_mem_realloc(unsigned char *file, int line, void *p, size_t size, int mayfail)
{
#ifdef LEAK_DEBUG
struct alloc_header *ah;
#endif
void *np;
if (p == DUMMY) return debug_mem_alloc(file, line, size, mayfail);
debug_test_free(file, line);
if (!p) {
errfile = file, errline = line, int_error("mem_realloc(NULL, %lu)", (unsigned long)size);
return NULL;
}
if (!size) {
debug_mem_free(file, line, p);
return DUMMY;
}
if (size > MAXINT) {
if (mayfail) return NULL;
overalloc();
}
#ifdef LEAK_DEBUG
p = (unsigned char *)p - L_D_S;
ah = p;
if (ah->magic != ALLOC_MAGIC) {
errfile = file, errline = line, int_error("mem_realloc: magic doesn't match: %08x", ah->magic);
return NULL;
}
ah->magic = ALLOC_REALLOC_MAGIC;
#ifdef REALLOC_FILL
if (!mayfail && size < (size_t)ah->size) memset((unsigned char *)p + L_D_S + size, REALLOC_FILL, ah->size - size);
#endif
#endif
#ifdef RED_ZONE
if (*((unsigned char *)p + L_D_S + ah->size + RED_ZONE_INC - 1) != RED_ZONE) {
errfile = file, errline = line, int_error("mem_realloc: red zone damaged: %02x (block allocated at %s:%d%s%s)", *((unsigned char *)p + L_D_S + ah->size + RED_ZONE_INC - 1),
#ifdef LEAK_DEBUG_LIST
ah->file, ah->line, ah->comment ? ":" : "", ah->comment ? ah->comment : (unsigned char *)"");
#else
"-", 0, "-");
#endif
return (unsigned char *)p + L_D_S;
}
#endif
retry:
if (!(np = realloc(p, size + L_D_S + RED_ZONE_INC))) {
if (out_of_memory(0, !mayfail ? cast_uchar "realloc" : NULL, size + L_D_S + RED_ZONE_INC)) goto retry;
ah->magic = ALLOC_MAGIC;
return NULL;
}
p = np;
#ifdef RED_ZONE
*((unsigned char *)p + size + L_D_S + RED_ZONE_INC - 1) = RED_ZONE;
#endif
#ifdef LEAK_DEBUG
ah = p;
mem_amount += size - ah->size;
ah->size = size;
ah->magic = ALLOC_MAGIC;
#ifdef LEAK_DEBUG_LIST
ah->prev->next = ah;
ah->next->prev = ah;
#endif
#endif
return (unsigned char *)p + L_D_S;
}
void set_mem_comment(void *p, unsigned char *c, int l)
{
#ifdef LEAK_DEBUG_LIST
struct alloc_header *ah = (struct alloc_header *)((unsigned char *)p - L_D_S);
if (ah->comment) free(ah->comment);
if ((ah->comment = malloc(l + 1))) memcpy(ah->comment, c, l), ah->comment[l] = 0;
#endif
}
#ifdef JS
unsigned char *get_mem_comment(void *p)
{
#ifdef LEAK_DEBUG_LIST
/* perm je prase: return ((struct alloc_header*)((unsigned char*)((void*)((unsigned char*)p-sizeof(int))) - L_D_S))->comment;*/
struct alloc_header *ah = (struct alloc_header *)((unsigned char *)p - L_D_S);
if (!ah->comment) return cast_uchar "";
else return ah->comment;
#else
return cast_uchar "";
#endif
}
#endif
#else
void *mem_alloc_(size_t size, int mayfail)
{
void *p;
debug_test_free(NULL, 0);
if (!size) return DUMMY;
if (size > MAXINT) {
if (mayfail) return NULL;
overalloc();
}
retry:
if (!(p = malloc(size))) {
if (out_of_memory(0, !mayfail ? cast_uchar "malloc" : NULL, size)) goto retry;
return NULL;
}
return p;
}
void *mem_calloc_(size_t size, int mayfail)
{
void *p;
debug_test_free(NULL, 0);
if (!size) return DUMMY;
if (size > MAXINT) {
if (mayfail) return NULL;
overalloc();
}
retry:
if (!(p = x_calloc(size))) {
if (out_of_memory(0, !mayfail ? cast_uchar "calloc" : NULL, size)) goto retry;
return NULL;
}
return p;
}
void mem_free(void *p)
{
if (p == DUMMY) return;
if (!p) {
internal("mem_free(NULL)");
return;
}
free(p);
}
void *mem_realloc_(void *p, size_t size, int mayfail)
{
void *np;
if (p == DUMMY) return mem_alloc_(size, mayfail);
debug_test_free(NULL, 0);
if (!p) {
internal("mem_realloc(NULL, %lu)", (unsigned long)size);
return NULL;
}
if (!size) {
mem_free(p);
return DUMMY;
}
if (size > MAXINT) {
if (mayfail) return NULL;
overalloc();
}
retry:
if (!(np = realloc(p, size))) {
if (out_of_memory(0, !mayfail ? cast_uchar "realloc" : NULL, size)) goto retry;
return NULL;
}
return np;
}
#endif
#ifdef OOPS
struct prot {
struct prot *next;
struct prot *prev;
sigjmp_buf buf;
};
static struct list_head prot = {&prot, &prot };
static void fault(void *dummy)
{
struct prot *p;
/*fprintf(stderr, "FAULT: %d !\n", (int)(unsigned long)dummy);*/
if (list_empty(prot)) {
fatal_tty_exit();
exit(0);
}
p = prot.next;
del_from_list(p);
longjmp(p->buf, 1);
}
sigjmp_buf *new_stack_frame(void)
{
static int handled = 0;
struct prot *new;
if (!handled) {
install_signal_handler(SIGSEGV, fault, (void *)SIGSEGV, 1);
install_signal_handler(SIGBUS, fault, (void *)SIGBUS, 1);
install_signal_handler(SIGFPE, fault, (void *)SIGFPE, 1);
install_signal_handler(SIGILL, fault, (void *)SIGILL, 1);
install_signal_handler(SIGABRT, fault, (void *)SIGABRT, 1);
handled = 1;
}
if (!(new = mem_alloc(sizeof(struct prot)))) return NULL;
add_to_list(prot, new);
return &new->buf;
}
void xpr(void)
{
if (!list_empty(prot)) {
struct prot *next = prot.next;
del_from_list(next);
mem_free(next);
}
}
void nopr(void)
{
free_list(prot);
}
#endif
#if !(defined(LEAK_DEBUG) && defined(LEAK_DEBUG_LIST))
unsigned char *memacpy(const unsigned char *src, size_t len)
{
unsigned char *m;
m = (unsigned char *)mem_alloc(len + 1);
memcpy(m, src, len);
m[len] = 0;
return m;
}
unsigned char *stracpy(const unsigned char *src)
{
return src ? memacpy(src, src != DUMMY ? strlen(cast_const_char src) : 0) : NULL;
}
#else
unsigned char *debug_memacpy(unsigned char *f, int l, unsigned char *src, size_t len)
{
unsigned char *m;
m = (unsigned char *)debug_mem_alloc(f, l, len + 1, 0);
memcpy(m, src, len);
m[len] = 0;
return m;
}
unsigned char *debug_stracpy(unsigned char *f, int l, unsigned char *src)
{
return src ? (unsigned char *)debug_memacpy(f, l, src, src != DUMMY ? strlen(cast_const_char src) : 0L) : NULL;
}
#endif
int snprint(unsigned char *s, int n, unsigned long num)
{
unsigned long q = 1;
while (q <= num / 10) q *= 10;
while (n-- > 1 && q) *(s++) = (unsigned char)(num / q + '0'), num %= q, q /= 10;
*s = 0;
return !!q;
}
int snzprint(unsigned char *s, int n, off_t num)
{
off_t q = 1;
if (n > 1 && num < 0) *(s++) = '-', num = -num, n--;
while (q <= num / 10) q *= 10;
while (n-- > 1 && q) *(s++) = (unsigned char)(num / q + '0'), num %= q, q /= 10;
*s = 0;
return !!q;
}
void add_to_strn(unsigned char **s, unsigned char *a)
{
unsigned char *p;
size_t l1 = strlen(cast_const_char *s), l2 = strlen(cast_const_char a);
if (((l1 | l2) | (l1 + l2 + 1)) > MAXINT) overalloc();
p = (unsigned char *)mem_realloc(*s, l1 + l2 + 1);
strcat(cast_char p, cast_const_char a);
*s = p;
}
void extend_str(unsigned char **s, int n)
{
size_t l = strlen(cast_const_char *s);
if (((l | n) | (l + n + 1)) > MAXINT) overalloc();
*s = (unsigned char *)mem_realloc(*s, l + n + 1);
}
void add_to_str(unsigned char **s, int *l, unsigned char *a)
{
unsigned char *p=*s;
unsigned old_length;
size_t new_length;
unsigned x;
old_length=*l;
new_length=strlen(cast_const_char a);
if (new_length + old_length >= MAXINT / 2 || new_length + old_length < new_length) overalloc();
new_length+=old_length;
*l=new_length;
x=old_length^new_length;
if (x>=old_length){
/* Need to realloc */
new_length|=(new_length>>1);
new_length|=(new_length>>2);
new_length|=(new_length>>4);
new_length|=(new_length>>8);
new_length|=(new_length>>16);
p=(unsigned char *)mem_realloc(p,new_length+1L);
}
*s=p;
strcpy(cast_char (p+old_length), cast_const_char a);
}
void add_bytes_to_str(unsigned char **s, int *l, unsigned char *a, size_t ll)
{
unsigned char *p=*s;
unsigned long old_length;
unsigned long new_length;
unsigned long x;
old_length=*l;
if (ll + old_length >= (unsigned)MAXINT / 2 || ll + old_length < (unsigned)ll) overalloc();
new_length=old_length+ll;
*l=new_length;
x=old_length^new_length;
if (x>=old_length){
/* Need to realloc */
new_length|=(new_length>>1);
new_length|=(new_length>>2);
new_length|=(new_length>>4);
new_length|=(new_length>>8);
new_length|=(new_length>>16);
p=(unsigned char *)mem_realloc(p,new_length+1);
}
*s=p;
memcpy(p+old_length,a,ll);
p[*l]=0;
}
void add_chr_to_str(unsigned char **s, int *l, unsigned char a)
{
unsigned char *p=*s;
unsigned long old_length;
unsigned long new_length;
unsigned long x;
old_length=*l;
if (1 + old_length >= MAXINT / 2 || 1 + old_length < 1) overalloc();
new_length=old_length+1;
*l=new_length;
x=old_length^new_length;
if (x>=old_length){
p=(unsigned char *)mem_realloc(p,new_length<<1);
}
*s=p;
p[old_length]=a;
p[new_length]=0;
}
void add_unsigned_long_num_to_str(unsigned char **s, int *l, unsigned long n)
{
unsigned char a[64];
snprint(a, 64, n);
add_to_str(s, l, a);
}
void add_num_to_str(unsigned char **s, int *l, off_t n)
{
unsigned char a[64];
snzprint(a, 64, n);
add_to_str(s, l, a);
}
void add_knum_to_str(unsigned char **s, int *l, off_t n)
{
unsigned char a[13];
if (n && n / (1024 * 1024) * (1024 * 1024) == n) snzprint(a, 12, n / (1024 * 1024)), a[strlen(cast_const_char a) + 1] = 0, a[strlen(cast_const_char a)] = 'M';
else if (n && n / 1024 * 1024 == n) snzprint(a, 12, n / 1024), a[strlen(cast_const_char a) + 1] = 0, a[strlen(cast_const_char a)] = 'k';
else snzprint(a, 13, n);
add_to_str(s, l, a);
}
long strtolx(unsigned char *c, unsigned char **end)
{
long l;
if (c[0] == '0' && upcase(c[1]) == 'X' && c[2]) l = strtol(cast_const_char(c + 2), (char **)(void *)end, 16);
else l = strtol(cast_const_char c, (char **)(void *)end, 10);
if (!*end) return l;
if (upcase(**end) == 'K') {
(*end)++;
if (l < -MAXINT / 1024) return -MAXINT;
if (l > MAXINT / 1024) return MAXINT;
return l * 1024;
}
if (upcase(**end) == 'M') {
(*end)++;
if (l < -MAXINT / (1024 * 1024)) return -MAXINT;
if (l > MAXINT / (1024 * 1024)) return MAXINT;
return l * (1024 * 1024);
}
return l;
}
/* Copies at most dst_size chars into dst. Ensures null termination of dst. */
unsigned char *safe_strncpy(unsigned char *dst, const unsigned char *src, size_t dst_size)
{
size_t to_copy;
if (!dst_size) return dst;
to_copy = strlen(cast_const_char src);
if (to_copy >= dst_size) to_copy = dst_size - 1;
memcpy(dst, src, to_copy);
memset(dst + to_copy, 0, dst_size - to_copy);
return dst;
}
#ifdef JS
/* deletes all nonprintable characters from string */
void skip_nonprintable(unsigned char *txt)
{
unsigned char *txt1=txt;
if (!txt||!*txt)return;
for (;*txt;txt++)
switch(*txt)
{
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23:
case 24:
case 25:
case 26:
case 27:
case 28:
case 29:
case 30:
case 31:
break;
case 9:
*txt1=' ';
txt1++;
break;
default:
*txt1=*txt;
txt1++;
break;
}
*txt1=0;
}
#endif
/* case insensitive compare of 2 strings */
/* comparison ends after len (or less) characters */
/* return value: 1=strings differ, 0=strings are same */
int casecmp(unsigned char *c1, unsigned char *c2, size_t len)
{
size_t i;
for (i = 0; i < len; i++) if (upcase(c1[i]) != upcase(c2[i])) return 1;
return 0;
}
int casestrstr(unsigned char *h, unsigned char *n)
{
unsigned char *p;
for (p=h;*p;p++)
{
if (!srch_cmp(*p,*n)) /* same */
{
unsigned char *q, *r;
for (q=n, r=p;*r&&*q;)
{
if (!srch_cmp(*q,*r)) r++,q++; /* same */
else break;
}
if (!*q) return 1;
}
}
return 0;
}
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