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Code Issues Releases Wiki Activity

Remove support for internal symbol table

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Since we can no longer generate an internal symbol table, there
doesn't seem to be much reason to retain the code that reads it.
This commit is contained in:
Evan Hunt
2020-03-10 21:15:43 -07:00
committed by Ondřej Surý
parent 1628f5865a
commit ad5250ff9c
24 changed files with 18 additions and 341 deletions
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77
lib/isc/backtrace.c
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@@ -221,80 +221,3 @@ isc_backtrace_gettrace(void **addrs, int maxaddrs, int *nframes) {
return (ISC_R_NOTIMPLEMENTED);
}
#endif /* ifdef BACKTRACE_LIBC */
isc_result_t
isc_backtrace_getsymbolfromindex(int idx, const void **addrp,
const char **symbolp) {
REQUIRE(addrp != NULL && *addrp == NULL);
REQUIRE(symbolp != NULL && *symbolp == NULL);
if (idx < 0 || idx >= isc__backtrace_nsymbols) {
return (ISC_R_RANGE);
}
*addrp = isc__backtrace_symtable[idx].addr;
*symbolp = isc__backtrace_symtable[idx].symbol;
return (ISC_R_SUCCESS);
}
static int
symtbl_compare(const void *addr, const void *entryarg) {
const isc_backtrace_symmap_t *entry = entryarg;
const isc_backtrace_symmap_t *end =
&isc__backtrace_symtable[isc__backtrace_nsymbols - 1];
if (isc__backtrace_nsymbols == 1 || entry == end) {
if (addr >= entry->addr) {
/*
* If addr is equal to or larger than that of the last
* entry of the table, we cannot be sure if this is
* within a valid range so we consider it valid.
*/
return (0);
}
return (-1);
}
/* entry + 1 is a valid entry from now on. */
if (addr < entry->addr) {
return (-1);
} else if (addr >= (entry + 1)->addr) {
return (1);
}
return (0);
}
isc_result_t
isc_backtrace_getsymbol(const void *addr, const char **symbolp,
unsigned long *offsetp) {
isc_result_t result = ISC_R_SUCCESS;
isc_backtrace_symmap_t *found;
/*
* Validate the arguments: intentionally avoid using REQUIRE().
* See notes in backtrace.h.
*/
if (symbolp == NULL || *symbolp != NULL || offsetp == NULL) {
return (ISC_R_FAILURE);
}
if (isc__backtrace_nsymbols < 1) {
return (ISC_R_NOTFOUND);
}
/*
* Search the table for the entry that meets:
* entry.addr <= addr < next_entry.addr.
*/
found = bsearch(addr, isc__backtrace_symtable, isc__backtrace_nsymbols,
sizeof(isc__backtrace_symtable[0]), symtbl_compare);
if (found == NULL) {
result = ISC_R_NOTFOUND;
} else {
*symbolp = found->symbol;
*offsetp = (unsigned long)((const char *)addr -
(char *)found->addr);
}
return (result);
}