static void
wrap_unwindtest_addr(OUT app_pc *addr, const char *name, const module_data_t *mod)
{
bool ok;
*addr = (app_pc) dr_get_proc_address(mod->handle, name);
CHECK(*addr != NULL, "cannot find lib export");
ok = drwrap_wrap(*addr, wrap_unwindtest_pre, wrap_unwindtest_post);
CHECK(ok, "wrap unwindtest failed");
CHECK(drwrap_is_wrapped(*addr, wrap_unwindtest_pre, wrap_unwindtest_post),
"drwrap_is_wrapped query failed");
}
static void
wrap_addr(OUT app_pc *addr, const char *name, const module_data_t *mod,
bool pre, bool post)
{
bool ok;
*addr = (app_pc) dr_get_proc_address(mod->handle, name);
CHECK(*addr != NULL, "cannot find lib export");
ok = drwrap_wrap(*addr, pre ? wrap_pre : NULL, post ? wrap_post : NULL);
CHECK(ok, "wrap failed");
CHECK(drwrap_is_wrapped(*addr, pre ? wrap_pre : NULL, post ? wrap_post : NULL),
"drwrap_is_wrapped query failed");
}
static void
module_load_event(void *drcontext, const module_data_t *mod, bool loaded)
{
app_pc towrap = (app_pc)dr_get_proc_address(mod->handle, "SSL_write");
if (towrap != NULL) {
bool ok = drwrap_wrap(towrap, wrap_pre_SSL_write, NULL);
if (!ok) {
dr_fprintf(STDERR, "Couldn’t wrap SSL_write\n");
DR_ASSERT(ok);
}
}
towrap = (app_pc)dr_get_proc_address(mod->handle, "SSL_read");
if (towrap != NULL) {
bool ok = drwrap_wrap(towrap, wrap_pre_SSL_read, wrap_post_SSL_read);
if (!ok) {
dr_fprintf(STDERR, "Couldn’t wrap SSL_read\n");
DR_ASSERT(ok);
}
}
towrap = (app_pc)dr_get_proc_address(mod->handle, "gnutls_record_send");
if (towrap != NULL) {
bool ok = drwrap_wrap(towrap, wrap_pre_SSL_write, NULL);
if (!ok) {
dr_fprintf(STDERR, "Couldn’t wrap gnutls_record_send\n");
DR_ASSERT(ok);
}
}
towrap = (app_pc)dr_get_proc_address(mod->handle, "gnutls_record_recv");
if (towrap != NULL) {
bool ok = drwrap_wrap(towrap, wrap_pre_SSL_read, wrap_post_SSL_read);
if (!ok) {
dr_fprintf(STDERR, "Couldn’t wrap gnutls_record_recv\n");
DR_ASSERT(ok);
}
}
}
/*
* Helper function for bulk use of drwrap.
*/
static void try_wrap_fn(const module_data_t *module, const char *name,
prewrapper_t pre, postwrapper_t post, bool *done)
{
if (*done)
return;
size_t offset;
drsym_error_t status = drsym_lookup_symbol(
module->full_path, name, &offset, DRSYM_DEFAULT_FLAGS);
if (status == DRSYM_SUCCESS) {
app_pc notify_fn = module->start + offset;
bool ok = drwrap_wrap(notify_fn, pre, post);
DR_ASSERT(ok);
*done = true;
}
}
void funcwrap_module_load(void * drcontext, module_data_t * module, bool loaded){
module_t * md = md_lookup_module(head, module->full_path);
int i = 0;
app_pc address;
if (md != NULL){
for (int i = 1; i <= md->bbs[0].start_addr; i++){
address = md->bbs[i].start_addr + module->start;
DEBUG_PRINT("funcwrap: %s module %x function wrapping\n", md->module, address);
drwrap_wrap(address, pre_func_cb, post_func_cb);
}
}
}
static
void module_load_event(void *drcontext, const module_data_t *mod, bool loaded)
{
app_pc towrap = (app_pc)
dr_get_proc_address(mod->start, IF_WINDOWS_ELSE("HeapAlloc", "malloc"));
if (towrap != NULL) {
#ifdef SHOW_RESULTS
bool ok =
#endif
drwrap_wrap(towrap, wrap_pre, wrap_post);
#ifdef SHOW_RESULTS
if (ok)
dr_fprintf(STDERR, "<wrapped HeapAlloc @"PFX"\n", towrap);
else {
/* We expect this w/ forwarded exports (e.g., on win7 both
* kernel32!HeapAlloc and kernelbase!HeapAlloc forward to
* the same routine in ntdll.dll)
*/
dr_fprintf(STDERR, "<FAILED to wrap HeapAlloc @"PFX": already wrapped?\n",
towrap);
}
#endif
}
}
/** Installs wrapper for a given symbol. */
static void wrapSymbol( const char* sym,
module_data_t* module,
size_t offset,
struct demangle_component* qual,
struct demangle_component* info ) {
app_pc pc = module->start + offset;
if( offset == 0 || pc == 0 ) {
dr_printf( "Skipping symbol %s\n", sym );
return;
}
size_t size;
char* className = cplus_demangle_print( DMGL_NO_OPTS, qual, 64, &size );
hashtable_lock( &wraps );
struct wrap* wrap = ( struct wrap* )hashtable_lookup( &wraps, (void*)pc );
if( wrap == NULL ) {
// Not wrapped yet.
if( !drwrap_wrap( pc, &wrapperPre, NULL ) ) {
dr_printf( "drwrap_wrap(%s %s of kind %i = +%p = %p) failed\n",
className,
info->type == DEMANGLE_COMPONENT_CTOR ? "ctor" : "dtor",
info->type == DEMANGLE_COMPONENT_CTOR ? info->u.s_ctor.kind :
info->u.s_dtor.kind,
(void*)offset,
(void*)pc );
exit( 1 );
}
wrap = alloc_wrap();
memset( wrap, 0, sizeof( struct wrap ) );
wrap->address = pc;
hashtable_add( &wraps, (void*)pc, wrap );
} else {
// Already wrapped - do nothing.
}
char* eventType = "?";
if( info->type == DEMANGLE_COMPONENT_CTOR ) {
switch( info->u.s_ctor.kind ) {
case gnu_v3_complete_object_allocating_ctor:
wrap->flags |= FLAG_ALLOCATING_CONSTRUCTOR;
eventType = "A";
break;
case gnu_v3_complete_object_ctor:
wrap->flags |= FLAG_COMPLETE_OBJECT_CONSTRUCTOR;
eventType = "C";
break;
case gnu_v3_base_object_ctor:
wrap->flags |= FLAG_BASE_OBJECT_CONSTRUCTOR;
eventType = "B";
break;
}
} else {
switch( info->u.s_dtor.kind ) {
case gnu_v3_deleting_dtor:
wrap->flags |= FLAG_DEALLOCATING_DESTRUCTOR;
eventType ="a";
break;
case gnu_v3_complete_object_dtor:
wrap->flags |= FLAG_COMPLETE_OBJECT_DESTRUCTOR;
eventType = "c";
break;
case gnu_v3_base_object_dtor:
wrap->flags |= FLAG_BASE_OBJECT_DESTRUCTOR;
eventType = "b";
break;
}
}
hashtable_unlock( &wraps );
dr_mutex_lock( outMutex );
dr_fprintf( outFile, "%s %p %s\n", eventType, (void*)pc, className );
dr_mutex_unlock( outMutex );
free( className );
}