Fix bound checking dlcose problem
The main problem is that an application called dlclose and then had a bound checking problem. The list of dll's in tccrun was not updated an caused a crash. Also fixed some minor other things. tccdbg.c: - Allow filenames like ../file.c - Rewrite DWARF_ABBREV_MEMBER_BF/DWARF_ABBREV_MEMBER a bit tccelf.c: - Add call to __bt_exit. This solves problem when dlclose is called tccrun.c: - Rewrite rt_printline_dwarf a litlle to use opcode_length correctly - Do not stop at DW_LNE_end_sequence - Fix DW_LNE_set_address again. Works now in *bsd. lib/bt-exe.c lib/bt-dll.c: - Add __bt_exit/__bound_exit_dll lib/bcheck.c: - Add __bound_exit_dll
This commit is contained in:
herman ten brugge
parent
4c82b00342
commit
aaec564a82
6 changed files with 192 additions and 149 deletions
20
lib/bcheck.c
20
lib/bcheck.c
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@ -270,6 +270,7 @@ DLL_EXPORT void FASTCALL __bound_local_delete(void *p1);
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void __bound_init(size_t *, int);
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void __bound_main_arg(int argc, char **argv, char **envp);
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void __bound_exit(void);
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void __bound_exit_dll(size_t *);
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#if !defined(_WIN32)
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void *__bound_mmap (void *start, size_t size, int prot, int flags, int fd,
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off_t offset);
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@ -1255,6 +1256,25 @@ void __attribute__((destructor)) __bound_exit(void)
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}
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}
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void __bound_exit_dll(size_t *p)
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{
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dprintf(stderr, "%s, %s()\n", __FILE__, __FUNCTION__);
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if (p) {
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while (p[0] != 0) {
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tree = splay_delete(p[0], tree);
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#if BOUND_DEBUG
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if (print_calls) {
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dprintf(stderr, "%s, %s(): remove static var %p 0x%lx\n",
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__FILE__, __FUNCTION__,
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(void *) p[0], (unsigned long) p[1]);
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}
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#endif
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p += 2;
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}
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}
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}
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#if HAVE_PTHREAD_CREATE
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typedef struct {
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void *(*start_routine) (void *);
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@ -6,6 +6,8 @@
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#define REDIR_ALL \
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REDIR(__bt_init) \
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REDIR(__bt_exit) \
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REDIR(__bound_exit_dll) \
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REDIR(tcc_backtrace) \
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\
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REDIR(__bound_ptr_add) \
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18
lib/bt-exe.c
18
lib/bt-exe.c
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@ -30,11 +30,27 @@ void __bt_init(rt_context *p, int num_callers)
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__rt_error = _rt_error;
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set_exception_handler();
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} else {
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p->num_callers = -1;
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p->next = rc->next, rc->next = p;
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}
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}
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__declspec(dllexport)
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void __bt_exit(rt_context *p)
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{
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__attribute__((weak)) void __bound_exit_dll(void*);
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struct rt_context *rc = &g_rtctxt;
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if (__bound_exit_dll && p->bounds_start)
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__bound_exit_dll(p->bounds_start);
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while (rc) {
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if (rc->next == p) {
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rc->next = rc->next->next;
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break;
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}
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rc = rc->next;
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}
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}
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/* copy a string and truncate it. */
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ST_FUNC char *pstrcpy(char *buf, size_t buf_size, const char *s)
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{
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66
tccdbg.c
66
tccdbg.c
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@ -541,7 +541,7 @@ static void dwarf_file(TCCState *s1)
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filename = strrchr(file->filename, '/');
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if (filename == NULL) {
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for (i = 1; i < dwarf_line.filename_size; i++)
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for (i = 0; i < dwarf_line.filename_size; i++)
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if (dwarf_line.filename_table[i].dir_entry == 0 &&
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strcmp(dwarf_line.filename_table[i].name,
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file->filename) == 0) {
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@ -685,6 +685,7 @@ ST_FUNC void tcc_debug_start(TCCState *s1)
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if (s1->dwarf) {
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int start_abbrev;
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unsigned char *ptr;
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char *undo;
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/* dwarf_abbrev */
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start_abbrev = dwarf_abbrev_section->data_offset;
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@ -775,18 +776,32 @@ ST_FUNC void tcc_debug_start(TCCState *s1)
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dwarf_data1(dwarf_line_section, DWARF_OPCODE_BASE);
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ptr = section_ptr_add(dwarf_line_section, sizeof(dwarf_line_opcodes));
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memcpy(ptr, dwarf_line_opcodes, sizeof(dwarf_line_opcodes));
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dwarf_line.dir_size = 1;
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dwarf_line.dir_table = (char **) tcc_malloc(sizeof (char *));
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undo = strrchr(filename, '/');
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if (undo)
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*undo = 0;
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dwarf_line.dir_size = 1 + (undo != NULL);
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dwarf_line.dir_table = (char **) tcc_malloc(sizeof (char *) *
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dwarf_line.dir_size);
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dwarf_line.dir_table[0] = tcc_strdup(buf);
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/* line state machine starts with file 1 instead of 0 */
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if (undo)
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dwarf_line.dir_table[1] = tcc_strdup(filename);
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dwarf_line.filename_size = 2;
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dwarf_line.filename_table =
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(struct dwarf_filename_struct *)
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tcc_malloc(2*sizeof (struct dwarf_filename_struct));
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dwarf_line.filename_table[0].dir_entry = 0;
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dwarf_line.filename_table[0].name = tcc_strdup(filename);
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dwarf_line.filename_table[1].dir_entry = 0;
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dwarf_line.filename_table[1].name = tcc_strdup(filename);
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if (undo) {
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dwarf_line.filename_table[0].name = tcc_strdup(filename);
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dwarf_line.filename_table[1].dir_entry = 1;
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dwarf_line.filename_table[1].name = tcc_strdup(undo + 1);
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*undo = '/';
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dwarf_line.filename_table[0].name = tcc_strdup(filename);
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}
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else {
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dwarf_line.filename_table[0].name = tcc_strdup(filename);
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dwarf_line.filename_table[1].dir_entry = 0;
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dwarf_line.filename_table[1].name = tcc_strdup(filename);
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}
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dwarf_line.line_size = dwarf_line.line_max_size = 0;
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dwarf_line.line_data = NULL;
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dwarf_line.cur_file = 1;
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@ -1020,7 +1035,8 @@ ST_FUNC void tcc_debug_bincl(TCCState *s1)
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}
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if (strcmp(filename, "<command line>")) {
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for (j = 0; j < dwarf_line.filename_size; j++)
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if (strcmp (dwarf_line.filename_table[j].name, filename) == 0)
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if (dwarf_line.filename_table[j].dir_entry == i &&
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strcmp (dwarf_line.filename_table[j].name, filename) == 0)
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break;
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if (j == dwarf_line.filename_size) {
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dwarf_line.filename_table =
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@ -1428,32 +1444,25 @@ static int tcc_get_dwarf_info(TCCState *s1, Sym *s)
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i = 0;
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while (e->next) {
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e = e->next;
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dwarf_data1(dwarf_info_section,
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e->type.t & VT_BITFIELD ? DWARF_ABBREV_MEMBER_BF
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: DWARF_ABBREV_MEMBER);
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dwarf_strp(dwarf_info_section,
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(e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
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? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
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dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
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dwarf_uleb128(dwarf_info_section, file->line_num);
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pos_type[i++] = dwarf_info_section->data_offset;
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dwarf_data4(dwarf_info_section, 0);
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if (e->type.t & VT_BITFIELD) {
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int pos = e->c * 8 + BIT_POS(e->type.t);
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int size = BIT_SIZE(e->type.t);
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dwarf_data1(dwarf_info_section, DWARF_ABBREV_MEMBER_BF);
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dwarf_strp(dwarf_info_section,
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(e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
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? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
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dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
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dwarf_uleb128(dwarf_info_section, file->line_num);
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pos_type[i++] = dwarf_info_section->data_offset;
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dwarf_data4(dwarf_info_section, 0);
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dwarf_uleb128(dwarf_info_section, size);
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dwarf_uleb128(dwarf_info_section, pos);
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}
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else {
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dwarf_data1(dwarf_info_section, DWARF_ABBREV_MEMBER);
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dwarf_strp(dwarf_info_section,
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(e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
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? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
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dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
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dwarf_uleb128(dwarf_info_section, file->line_num);
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pos_type[i++] = dwarf_info_section->data_offset;
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dwarf_data4(dwarf_info_section, 0);
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else
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dwarf_uleb128(dwarf_info_section, e->c);
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}
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}
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dwarf_data1(dwarf_info_section, 0);
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write32le(dwarf_info_section->data + pos_sib,
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@ -1785,12 +1794,13 @@ ST_FUNC void tcc_debug_funcstart(TCCState *s1, Sym *sym)
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dwarf_info.func = sym;
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dwarf_info.line = file->line_num;
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if (s1->do_backtrace) {
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int i;
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int i, len;
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dwarf_line_op(s1, 0); // extended
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dwarf_uleb128_op(s1, strlen(funcname) + 2);
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dwarf_line_op(s1, DW_LNE_hi_user - 1);
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for (i = 0; i < strlen(funcname) + 1; i++)
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len = strlen(funcname) + 1;
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for (i = 0; i < len; i++)
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dwarf_line_op(s1, funcname[i]);
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}
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}
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9
tccelf.c
9
tccelf.c
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@ -1389,15 +1389,14 @@ ST_FUNC void tcc_add_btstub(TCCState *s1)
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put_ptr(s1, dwarf_line_str_section, 0);
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else
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put_ptr(s1, dwarf_str_section, 0);
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put_ptr(s1, text_section, 0);
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}
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else
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{
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put_ptr(s1, stab_section, 0);
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put_ptr(s1, stab_section, -1);
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put_ptr(s1, stab_section->link, 0);
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section_ptr_add(s, PTR_SIZE);
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}
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*(addr_t *)section_ptr_add(s, PTR_SIZE) = s1->dwarf;
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/* skip esym_start/esym_end/elf_str (not loaded) */
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section_ptr_add(s, 3 * PTR_SIZE);
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/* prog_base : local nameless symbol with offset 0 at SHN_ABS */
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@ -1412,7 +1411,7 @@ ST_FUNC void tcc_add_btstub(TCCState *s1)
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section_ptr_add(s, n);
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cstr_new(&cstr);
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cstr_printf(&cstr,
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"extern void __bt_init(),__bt_init_dll();"
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"extern void __bt_init(),__bt_exit(),__bt_init_dll();"
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"static void *__rt_info[];"
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"__attribute__((constructor)) static void __bt_init_rt(){");
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#ifdef TCC_TARGET_PE
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@ -1425,6 +1424,10 @@ ST_FUNC void tcc_add_btstub(TCCState *s1)
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#endif
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cstr_printf(&cstr, "__bt_init(__rt_info,%d);}",
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s1->output_type == TCC_OUTPUT_DLL ? 0 : s1->rt_num_callers + 1);
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/* In case dlcose is called by application */
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cstr_printf(&cstr,
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"__attribute__((destructor)) static void __bt_exit_rt(){"
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"__bt_exit(__rt_info);}");
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tcc_compile_string_no_debug(s1, cstr.data);
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cstr_free(&cstr);
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set_local_sym(s1, &"___rt_info"[!s1->leading_underscore], s, o);
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226
tccrun.c
226
tccrun.c
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@ -34,9 +34,9 @@ typedef struct rt_context
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};
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struct {
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unsigned char *dwarf_line, *dwarf_line_end, *dwarf_line_str;
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addr_t dwarf_text;
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};
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};
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addr_t dwarf;
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ElfW(Sym) *esym_start, *esym_end;
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char *elf_str;
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addr_t prog_base;
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@ -182,15 +182,14 @@ LIBTCCAPI int tcc_run(TCCState *s1, int argc, char **argv)
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rc->dwarf_line_end = dwarf_line_section->data + dwarf_line_section->data_offset;
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if (dwarf_line_str_section)
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rc->dwarf_line_str = dwarf_line_str_section->data;
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rc->dwarf_text = text_section->sh_addr;
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}
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else
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{
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rc->stab_sym = (Stab_Sym *)stab_section->data;
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rc->stab_sym_end = (Stab_Sym *)(stab_section->data + stab_section->data_offset);
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rc->stab_str = (char *)stab_section->link->data;
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rc->dwarf_text = 0;
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}
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rc->dwarf = s1->dwarf;
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rc->esym_start = (ElfW(Sym) *)(symtab_section->data);
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rc->esym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
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rc->elf_str = (char *)symtab_section->link->data;
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@ -666,7 +665,9 @@ static addr_t rt_printline_dwarf (rt_context *rc, addr_t wanted_pc,
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unsigned char *ln;
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unsigned char *cp;
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unsigned char *end;
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unsigned int size;
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unsigned char *opcode_length;
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unsigned long long size;
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unsigned int length;
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unsigned char version;
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unsigned int min_insn_length;
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unsigned int max_ops_per_insn;
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@ -678,7 +679,7 @@ static addr_t rt_printline_dwarf (rt_context *rc, addr_t wanted_pc,
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unsigned int i;
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unsigned int j;
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unsigned int len;
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unsigned int value;
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unsigned long long value;
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struct {
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unsigned int type;
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unsigned int form;
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@ -695,13 +696,11 @@ static addr_t rt_printline_dwarf (rt_context *rc, addr_t wanted_pc,
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addr_t last_pc;
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addr_t pc;
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addr_t func_addr;
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addr_t offset_dll;
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int line;
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char *filename;
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char *function;
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next:
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offset_dll = 0;
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ln = rc->dwarf_line;
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while (ln < rc->dwarf_line_end) {
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dir_size = 0;
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@ -712,13 +711,18 @@ next:
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line = 1;
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filename = NULL;
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function = NULL;
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length = 4;
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size = dwarf_read_4(ln, rc->dwarf_line_end);
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if (size == 0xffffffffu) // dwarf 64
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length = 8, size = dwarf_read_8(ln, rc->dwarf_line_end);
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end = ln + size;
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if (end < ln || end > rc->dwarf_line_end)
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break;
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version = dwarf_read_2(ln, end);
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if (version >= 5)
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ln += 6; // address size, segment selector, prologue Length
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ln += length + 2; // address size, segment selector, prologue Length
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else
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ln += 4; // prologue Length
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ln += length; // prologue Length
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min_insn_length = dwarf_read_1(ln, end);
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if (version >= 4)
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max_ops_per_insn = dwarf_read_1(ln, end);
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@ -729,8 +733,9 @@ next:
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line_base |= line_base >= 0x80 ? ~0xff : 0;
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line_range = dwarf_read_1(ln, end);
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opcode_base = dwarf_read_1(ln, end);
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opcode_length = ln;
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ln += opcode_base - 1;
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opindex = 0;
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ln += 12;
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if (version >= 5) {
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col = dwarf_read_1(ln, end);
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for (i = 0; i < col; i++) {
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@ -744,11 +749,13 @@ next:
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if (entry_format[j].form != DW_FORM_line_strp)
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goto next_line;
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#if 0
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value = dwarf_read_4(ln, end);
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value = length == 4 ? dwarf_read_4(ln, end)
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: dwarf_read_8(ln, end);
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if (i < DIR_TABLE_SIZE)
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dirs[i] = (char *)rc->dwarf_line_str + value;
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#else
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dwarf_read_4(ln, end);
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length == 4 ? dwarf_read_4(ln, end)
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: dwarf_read_8(ln, end);
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#endif
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}
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else
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@ -766,7 +773,8 @@ next:
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if (entry_format[j].type == DW_LNCT_path) {
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if (entry_format[j].form != DW_FORM_line_strp)
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goto next_line;
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value = dwarf_read_4(ln, end);
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value = length == 4 ? dwarf_read_4(ln, end)
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: dwarf_read_8(ln, end);
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if (i < FILE_TABLE_SIZE)
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filename_table[i].name =
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(char *)rc->dwarf_line_str + value;
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@ -813,108 +821,8 @@ next:
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filename = filename_table[0].name;
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while (ln < end) {
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last_pc = pc;
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switch (dwarf_read_1(ln, end)) {
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case 0:
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len = dwarf_read_uleb128(&ln, end);
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cp = ln;
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ln += len;
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if (len == 0)
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goto next_line;
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switch (dwarf_read_1(cp, end)) {
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case DW_LNE_end_sequence:
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goto next_line;
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case DW_LNE_set_address:
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#if PTR_SIZE == 4
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pc = dwarf_read_4(cp, end);
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#else
|
||||
pc = dwarf_read_8(cp, end);
|
||||
#endif
|
||||
if (rc->num_callers < 0) {
|
||||
/* dll */
|
||||
if (!offset_dll)
|
||||
offset_dll = pc;
|
||||
pc = rc->dwarf_text + (pc - offset_dll);
|
||||
}
|
||||
opindex = 0;
|
||||
break;
|
||||
case DW_LNE_define_file: /* deprecated */
|
||||
if (++filename_size < FILE_TABLE_SIZE) {
|
||||
filename_table[filename_size - 1].name = (char *)ln - 1;
|
||||
while (dwarf_read_1(ln, end)) {}
|
||||
filename_table[filename_size - 1].dir_entry =
|
||||
dwarf_read_uleb128(&ln, end);
|
||||
}
|
||||
else {
|
||||
while (dwarf_read_1(ln, end)) {}
|
||||
dwarf_read_uleb128(&ln, end);
|
||||
}
|
||||
dwarf_read_uleb128(&ln, end); // time
|
||||
dwarf_read_uleb128(&ln, end); // size
|
||||
break;
|
||||
case DW_LNE_hi_user - 1:
|
||||
function = (char *)cp;
|
||||
func_addr = pc;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case DW_LNS_copy:
|
||||
break;
|
||||
case DW_LNS_advance_pc:
|
||||
if (max_ops_per_insn == 1)
|
||||
pc += dwarf_read_uleb128(&ln, end) * min_insn_length;
|
||||
else {
|
||||
unsigned long long off = dwarf_read_uleb128(&ln, end);
|
||||
|
||||
pc += (opindex + off) / max_ops_per_insn *
|
||||
min_insn_length;
|
||||
opindex = (opindex + off) % max_ops_per_insn;
|
||||
}
|
||||
i = 0;
|
||||
goto check_pc;
|
||||
case DW_LNS_advance_line:
|
||||
line += dwarf_read_sleb128(&ln, end);
|
||||
break;
|
||||
case DW_LNS_set_file:
|
||||
i = dwarf_read_uleb128(&ln, end);
|
||||
if (i < FILE_TABLE_SIZE && i < filename_size)
|
||||
filename = filename_table[i].name;
|
||||
break;
|
||||
case DW_LNS_set_column:
|
||||
dwarf_read_uleb128(&ln, end);
|
||||
break;
|
||||
case DW_LNS_negate_stmt:
|
||||
break;
|
||||
case DW_LNS_set_basic_block:
|
||||
break;
|
||||
case DW_LNS_const_add_pc:
|
||||
if (max_ops_per_insn == 1)
|
||||
pc += ((255 - opcode_base) / line_range) * min_insn_length;
|
||||
else {
|
||||
unsigned int off = (255 - opcode_base) / line_range;
|
||||
|
||||
pc += ((opindex + off) / max_ops_per_insn) *
|
||||
min_insn_length;
|
||||
opindex = (opindex + off) % max_ops_per_insn;
|
||||
}
|
||||
i = 0;
|
||||
goto check_pc;
|
||||
case DW_LNS_fixed_advance_pc:
|
||||
i = dwarf_read_2(ln, end);
|
||||
pc += i;
|
||||
opindex = 0;
|
||||
i = 0;
|
||||
goto check_pc;
|
||||
case DW_LNS_set_prologue_end:
|
||||
break;
|
||||
case DW_LNS_set_epilogue_begin:
|
||||
break;
|
||||
case DW_LNS_set_isa:
|
||||
dwarf_read_uleb128(&ln, end);
|
||||
break;
|
||||
default:
|
||||
i = ln[-1];
|
||||
i = dwarf_read_1(ln, end);
|
||||
if (i >= opcode_base) {
|
||||
if (max_ops_per_insn == 1)
|
||||
pc += ((i - opcode_base) / line_range) * min_insn_length;
|
||||
else {
|
||||
|
|
@ -928,7 +836,91 @@ check_pc:
|
|||
if (pc >= wanted_pc && wanted_pc >= last_pc)
|
||||
goto found;
|
||||
line += i;
|
||||
break;
|
||||
}
|
||||
else {
|
||||
switch (i) {
|
||||
case 0:
|
||||
len = dwarf_read_uleb128(&ln, end);
|
||||
cp = ln;
|
||||
ln += len;
|
||||
if (len == 0)
|
||||
goto next_line;
|
||||
switch (dwarf_read_1(cp, end)) {
|
||||
case DW_LNE_end_sequence:
|
||||
break;
|
||||
case DW_LNE_set_address:
|
||||
#if PTR_SIZE == 4
|
||||
pc = dwarf_read_4(cp, end);
|
||||
#else
|
||||
pc = dwarf_read_8(cp, end);
|
||||
#endif
|
||||
opindex = 0;
|
||||
break;
|
||||
case DW_LNE_define_file: /* deprecated */
|
||||
if (++filename_size < FILE_TABLE_SIZE) {
|
||||
filename_table[filename_size - 1].name = (char *)ln - 1;
|
||||
while (dwarf_read_1(ln, end)) {}
|
||||
filename_table[filename_size - 1].dir_entry =
|
||||
dwarf_read_uleb128(&ln, end);
|
||||
}
|
||||
else {
|
||||
while (dwarf_read_1(ln, end)) {}
|
||||
dwarf_read_uleb128(&ln, end);
|
||||
}
|
||||
dwarf_read_uleb128(&ln, end); // time
|
||||
dwarf_read_uleb128(&ln, end); // size
|
||||
break;
|
||||
case DW_LNE_hi_user - 1:
|
||||
function = (char *)cp;
|
||||
func_addr = pc;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case DW_LNS_advance_pc:
|
||||
if (max_ops_per_insn == 1)
|
||||
pc += dwarf_read_uleb128(&ln, end) * min_insn_length;
|
||||
else {
|
||||
unsigned long long off = dwarf_read_uleb128(&ln, end);
|
||||
|
||||
pc += (opindex + off) / max_ops_per_insn *
|
||||
min_insn_length;
|
||||
opindex = (opindex + off) % max_ops_per_insn;
|
||||
}
|
||||
i = 0;
|
||||
goto check_pc;
|
||||
case DW_LNS_advance_line:
|
||||
line += dwarf_read_sleb128(&ln, end);
|
||||
break;
|
||||
case DW_LNS_set_file:
|
||||
i = dwarf_read_uleb128(&ln, end);
|
||||
if (i < FILE_TABLE_SIZE && i < filename_size)
|
||||
filename = filename_table[i].name;
|
||||
break;
|
||||
case DW_LNS_const_add_pc:
|
||||
if (max_ops_per_insn == 1)
|
||||
pc += ((255 - opcode_base) / line_range) * min_insn_length;
|
||||
else {
|
||||
unsigned int off = (255 - opcode_base) / line_range;
|
||||
|
||||
pc += ((opindex + off) / max_ops_per_insn) *
|
||||
min_insn_length;
|
||||
opindex = (opindex + off) % max_ops_per_insn;
|
||||
}
|
||||
i = 0;
|
||||
goto check_pc;
|
||||
case DW_LNS_fixed_advance_pc:
|
||||
i = dwarf_read_2(ln, end);
|
||||
pc += i;
|
||||
opindex = 0;
|
||||
i = 0;
|
||||
goto check_pc;
|
||||
default:
|
||||
for (j = 0; j < opcode_length[i - 1]; j++)
|
||||
dwarf_read_uleb128 (&ln, end);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
next_line:
|
||||
|
|
@ -988,7 +980,7 @@ static int _rt_error(void *fp, void *ip, const char *fmt, va_list ap)
|
|||
ret = rt_get_caller_pc(&pc, rc, i);
|
||||
a = "%s";
|
||||
if (ret != -1) {
|
||||
if ((addr_t)rc->dwarf_text)
|
||||
if (rc->dwarf)
|
||||
pc = rt_printline_dwarf(rc, pc, level ? "by" : "at", skip);
|
||||
else
|
||||
pc = rt_printline(rc, pc, level ? "by" : "at", skip);
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue