/* Add a never-delete-me Spec. This is a bit of a kludge. On the
assumption that this is called only at startup, only handle the
case where topSpecs is completely empty, or if it isn't, it has
just one entry and that is the one with NULL seginfo -- that is the
entry that holds these initial specs. */
__attribute__((unused)) /* not used on all platforms */
static void add_hardwired_spec ( HChar* sopatt, HChar* fnpatt,
Addr to_addr,
const HChar** mandatory )
{
Spec* spec = dinfo_zalloc("redir.ahs.1", sizeof(Spec));
vg_assert(spec);
if (topSpecs == NULL) {
topSpecs = dinfo_zalloc("redir.ahs.2", sizeof(TopSpec));
vg_assert(topSpecs);
/* symtab_zalloc sets all fields to zero */
}
vg_assert(topSpecs != NULL);
vg_assert(topSpecs->next == NULL);
vg_assert(topSpecs->seginfo == NULL);
/* FIXED PARTS */
spec->from_sopatt = sopatt;
spec->from_fnpatt = fnpatt;
spec->to_addr = to_addr;
spec->isWrap = False;
spec->mandatory = mandatory;
/* VARIABLE PARTS */
spec->mark = False; /* not significant */
spec->done = False; /* not significant */
spec->next = topSpecs->specs;
topSpecs->specs = spec;
}
void VG_(redir_notify_new_DebugInfo)( DebugInfo* newsi )
{
Bool ok, isWrap;
Int i, nsyms;
Spec* specList;
Spec* spec;
TopSpec* ts;
TopSpec* newts;
HChar* sym_name;
Addr sym_addr, sym_toc;
HChar demangled_sopatt[N_DEMANGLED];
HChar demangled_fnpatt[N_DEMANGLED];
Bool check_ppcTOCs = False;
Bool isText;
const UChar* newsi_soname;
# if defined(VG_PLAT_USES_PPCTOC)
check_ppcTOCs = True;
# endif
vg_assert(newsi);
newsi_soname = VG_(DebugInfo_get_soname)(newsi);
vg_assert(newsi_soname != NULL);
/* stay sane: we don't already have this. */
for (ts = topSpecs; ts; ts = ts->next)
vg_assert(ts->seginfo != newsi);
/* scan this DebugInfo's symbol table, pulling out and demangling
any specs found */
specList = NULL; /* the spec list we're building up */
nsyms = VG_(DebugInfo_syms_howmany)( newsi );
for (i = 0; i < nsyms; i++) {
VG_(DebugInfo_syms_getidx)( newsi, i, &sym_addr, &sym_toc,
NULL, &sym_name, &isText );
ok = VG_(maybe_Z_demangle)( sym_name, demangled_sopatt, N_DEMANGLED,
demangled_fnpatt, N_DEMANGLED, &isWrap );
/* ignore data symbols */
if (!isText)
continue;
if (!ok) {
/* It's not a full-scale redirect, but perhaps it is a load-notify
fn? Let the load-notify department see it. */
handle_maybe_load_notifier( newsi_soname, sym_name, sym_addr );
continue;
}
if (check_ppcTOCs && sym_toc == 0) {
/* This platform uses toc pointers, but none could be found
for this symbol, so we can't safely redirect/wrap to it.
Just skip it; we'll make a second pass over the symbols in
the following loop, and complain at that point. */
continue;
}
spec = dinfo_zalloc("redir.rnnD.1", sizeof(Spec));
vg_assert(spec);
spec->from_sopatt = dinfo_strdup("redir.rnnD.2", demangled_sopatt);
spec->from_fnpatt = dinfo_strdup("redir.rnnD.3", demangled_fnpatt);
vg_assert(spec->from_sopatt);
vg_assert(spec->from_fnpatt);
spec->to_addr = sym_addr;
spec->isWrap = isWrap;
/* check we're not adding manifestly stupid destinations */
vg_assert(is_plausible_guest_addr(sym_addr));
spec->next = specList;
spec->mark = False; /* not significant */
spec->done = False; /* not significant */
specList = spec;
}
if (check_ppcTOCs) {
for (i = 0; i < nsyms; i++) {
VG_(DebugInfo_syms_getidx)( newsi, i, &sym_addr, &sym_toc,
NULL, &sym_name, &isText );
ok = isText
&& VG_(maybe_Z_demangle)(
sym_name, demangled_sopatt, N_DEMANGLED,
demangled_fnpatt, N_DEMANGLED, &isWrap );
if (!ok)
/* not a redirect. Ignore. */
continue;
if (sym_toc != 0)
/* has a valid toc pointer. Ignore. */
continue;
for (spec = specList; spec; spec = spec->next)
if (0 == VG_(strcmp)(spec->from_sopatt, demangled_sopatt)
&& 0 == VG_(strcmp)(spec->from_fnpatt, demangled_fnpatt))
break;
if (spec)
/* a redirect to some other copy of that symbol, which
does have a TOC value, already exists */
continue;
/* Complain */
VG_(message)(Vg_DebugMsg,
"WARNING: no TOC ptr for redir/wrap to %s %s\n",
demangled_sopatt, demangled_fnpatt);
}
}
/* Ok. Now specList holds the list of specs from the DebugInfo.
Build a new TopSpec, but don't add it to topSpecs yet. */
newts = dinfo_zalloc("redir.rnnD.4", sizeof(TopSpec));
vg_assert(newts);
newts->next = NULL; /* not significant */
newts->seginfo = newsi;
newts->specs = specList;
newts->mark = False; /* not significant */
/* We now need to augment the active set with the following partial
cross product:
(1) actives formed by matching the new specs in specList against
all symbols currently listed in topSpecs
(2) actives formed by matching the new symbols in newsi against
all specs currently listed in topSpecs
(3) actives formed by matching the new symbols in newsi against
the new specs in specList
This is necessary in order to maintain the invariant that
Actives contains all bindings generated by matching ALL specs in
topSpecs against ALL symbols in topSpecs (that is, a cross
product of ALL known specs against ALL known symbols).
*/
/* Case (1) */
for (ts = topSpecs; ts; ts = ts->next) {
if (ts->seginfo)
generate_and_add_actives( specList, newts,
ts->seginfo, ts );
}
/* Case (2) */
for (ts = topSpecs; ts; ts = ts->next) {
generate_and_add_actives( ts->specs, ts,
newsi, newts );
}
/* Case (3) */
generate_and_add_actives( specList, newts,
newsi, newts );
/* Finally, add the new TopSpec. */
newts->next = topSpecs;
topSpecs = newts;
if (VG_(clo_trace_redir))
show_redir_state("after VG_(redir_notify_new_DebugInfo)");
}
void VG_(redir_notify_new_DebugInfo)( DebugInfo* newdi )
{
Bool ok, isWrap;
Int i, nsyms, becTag, becPrio;
Spec* specList;
Spec* spec;
TopSpec* ts;
TopSpec* newts;
UChar* sym_name_pri;
UChar** sym_names_sec;
Addr sym_addr, sym_toc;
HChar demangled_sopatt[N_DEMANGLED];
HChar demangled_fnpatt[N_DEMANGLED];
Bool check_ppcTOCs = False;
Bool isText;
const UChar* newdi_soname;
# if defined(VG_PLAT_USES_PPCTOC)
check_ppcTOCs = True;
# endif
vg_assert(newdi);
newdi_soname = VG_(DebugInfo_get_soname)(newdi);
vg_assert(newdi_soname != NULL);
#ifdef ENABLE_INNER
{
const UChar* newdi_filename = VG_(DebugInfo_get_filename)(newdi);
const UChar* newdi_basename = VG_(basename) (newdi_filename);
if (VG_(strncmp) (newdi_basename, "vgpreload_", 10) == 0) {
struct vg_stat newdi_stat;
SysRes newdi_res;
Char in_vglib_filename[VKI_PATH_MAX];
struct vg_stat in_vglib_stat;
SysRes in_vglib_res;
newdi_res = VG_(stat)(newdi_filename, &newdi_stat);
VG_(strncpy) (in_vglib_filename, VG_(libdir), VKI_PATH_MAX);
VG_(strncat) (in_vglib_filename, "/", VKI_PATH_MAX);
VG_(strncat) (in_vglib_filename, newdi_basename, VKI_PATH_MAX);
in_vglib_res = VG_(stat)(in_vglib_filename, &in_vglib_stat);
if (!sr_isError(in_vglib_res)
&& !sr_isError(newdi_res)
&& (newdi_stat.dev != in_vglib_stat.dev
|| newdi_stat.ino != in_vglib_stat.ino)) {
if ( VG_(clo_verbosity) > 1 ) {
VG_(message)( Vg_DebugMsg,
"Skipping vgpreload redir in %s"
" (not from VALGRIND_LIB_INNER)\n",
newdi_filename);
}
return;
} else {
if ( VG_(clo_verbosity) > 1 ) {
VG_(message)( Vg_DebugMsg,
"Executing vgpreload redir in %s"
" (from VALGRIND_LIB_INNER)\n",
newdi_filename);
}
}
}
}
#endif
for (ts = topSpecs; ts; ts = ts->next)
vg_assert(ts->seginfo != newdi);
specList = NULL;
nsyms = VG_(DebugInfo_syms_howmany)( newdi );
for (i = 0; i < nsyms; i++) {
VG_(DebugInfo_syms_getidx)( newdi, i, &sym_addr, &sym_toc,
NULL, &sym_name_pri, &sym_names_sec,
&isText, NULL );
UChar* twoslots[2];
UChar** names_init = alloc_symname_array(sym_name_pri, sym_names_sec,
&twoslots[0]);
UChar** names;
for (names = names_init; *names; names++) {
ok = VG_(maybe_Z_demangle)( *names,
demangled_sopatt, N_DEMANGLED,
demangled_fnpatt, N_DEMANGLED,
&isWrap, &becTag, &becPrio );
if (!isText)
continue;
if (!ok) {
handle_maybe_load_notifier( newdi_soname, *names, sym_addr );
continue;
}
if (check_ppcTOCs && sym_toc == 0) {
continue;
}
if (0 == VG_(strncmp) (demangled_sopatt,
VG_SO_SYN_PREFIX, VG_SO_SYN_PREFIX_LEN)) {
if (!VG_(clo_soname_synonyms))
continue;
SizeT const sopatt_syn_len
= VG_(strlen)(demangled_sopatt+VG_SO_SYN_PREFIX_LEN);
HChar const* last = VG_(clo_soname_synonyms);
while (*last) {
HChar const* first = last;
last = advance_to_equal(first);
if ((last - first) == sopatt_syn_len
&& 0 == VG_(strncmp)(demangled_sopatt+VG_SO_SYN_PREFIX_LEN,
first,
sopatt_syn_len)) {
first = last + 1;
last = advance_to_comma(first);
VG_(strncpy)(demangled_sopatt, first, last - first);
demangled_sopatt[last - first] = '\0';
break;
}
last = advance_to_comma(last);
if (*last == ',')
last++;
}
if (0 == VG_(strncmp) (demangled_sopatt,
VG_SO_SYN_PREFIX, VG_SO_SYN_PREFIX_LEN))
continue;
}
spec = dinfo_zalloc("redir.rnnD.1", sizeof(Spec));
vg_assert(spec);
spec->from_sopatt = dinfo_strdup("redir.rnnD.2", demangled_sopatt);
spec->from_fnpatt = dinfo_strdup("redir.rnnD.3", demangled_fnpatt);
vg_assert(spec->from_sopatt);
vg_assert(spec->from_fnpatt);
spec->to_addr = sym_addr;
spec->isWrap = isWrap;
spec->becTag = becTag;
spec->becPrio = becPrio;
vg_assert(is_plausible_guest_addr(sym_addr));
spec->next = specList;
spec->mark = False;
spec->done = False;
specList = spec;
}
free_symname_array(names_init, &twoslots[0]);
}
if (check_ppcTOCs) {
for (i = 0; i < nsyms; i++) {
VG_(DebugInfo_syms_getidx)( newdi, i, &sym_addr, &sym_toc,
NULL, &sym_name_pri, &sym_names_sec,
&isText, NULL );
UChar* twoslots[2];
UChar** names_init = alloc_symname_array(sym_name_pri, sym_names_sec,
&twoslots[0]);
UChar** names;
for (names = names_init; *names; names++) {
ok = isText
&& VG_(maybe_Z_demangle)(
*names, demangled_sopatt, N_DEMANGLED,
demangled_fnpatt, N_DEMANGLED, &isWrap, NULL, NULL );
if (!ok)
continue;
if (sym_toc != 0)
continue;
for (spec = specList; spec; spec = spec->next)
if (0 == VG_(strcmp)(spec->from_sopatt, demangled_sopatt)
&& 0 == VG_(strcmp)(spec->from_fnpatt, demangled_fnpatt))
break;
if (spec)
continue;
VG_(message)(Vg_DebugMsg,
"WARNING: no TOC ptr for redir/wrap to %s %s\n",
demangled_sopatt, demangled_fnpatt);
}
free_symname_array(names_init, &twoslots[0]);
}
}
newts = dinfo_zalloc("redir.rnnD.4", sizeof(TopSpec));
vg_assert(newts);
newts->next = NULL;
newts->seginfo = newdi;
newts->specs = specList;
newts->mark = False;
for (ts = topSpecs; ts; ts = ts->next) {
if (ts->seginfo)
generate_and_add_actives( specList, newts,
ts->seginfo, ts );
}
for (ts = topSpecs; ts; ts = ts->next) {
generate_and_add_actives( ts->specs, ts,
newdi, newts );
}
generate_and_add_actives( specList, newts,
newdi, newts );
newts->next = topSpecs;
topSpecs = newts;
if (VG_(clo_trace_redir))
show_redir_state("after VG_(redir_notify_new_DebugInfo)");
handle_require_text_symbols(newdi);
}
