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make dladdr consistently produce the first symbol in presence of aliases 

the early-exit condition for the symbol match loop on exact matches
caused dladdr to produce the first match for an exact match, but the
last match for an inexact match. in the interest of consistency,
require a strictly-closer match to replace an already-found one.
This commit is contained in:
Rich Felker 2018-06-28 12:07:51 -04:00
parent c8b49b2fbc
commit f6870d6b4f
1 changed files with 1 additions and 1 deletions
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2
ldso/dynlink.c
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@ -1978,7 +1978,7 @@ int dladdr(const void *addr_arg, Dl_info *info)
&& (1<<(sym->st_info&0xf) & OK_TYPES) && (1<<(sym->st_info&0xf) & OK_TYPES)
&& (1<<(sym->st_info>>4) & OK_BINDS)) { && (1<<(sym->st_info>>4) & OK_BINDS)) {
size_t symaddr = (size_t)laddr(p, sym->st_value); size_t symaddr = (size_t)laddr(p, sym->st_value);
if (symaddr > addr || symaddr < best) if (symaddr > addr || symaddr <= best)
continue; continue;
best = symaddr; best = symaddr;
bestsym = sym; bestsym = sym;