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#include "rust_internal.h"
rust_crate_cache::lib::lib(rust_dom *dom, char const *name)
: handle(0),
dom(dom)
{
#if defined(__WIN32__)
handle = (uintptr_t)LoadLibrary(_T(name));
#else
handle = (uintptr_t)dlopen(name, RTLD_GLOBAL|RTLD_LAZY);
#endif
DLOG(dom, cache, "loaded library '%s' as 0x%" PRIxPTR,
name, handle);
}
rust_crate_cache::lib::~lib() {
DLOG(dom, cache, "~rust_crate_cache::lib(0x%" PRIxPTR ")",
handle);
if (handle) {
#if defined(__WIN32__)
FreeLibrary((HMODULE)handle);
#else
dlclose((void*)handle);
#endif
}
}
uintptr_t
rust_crate_cache::lib::get_handle() {
return handle;
}
rust_crate_cache::c_sym::c_sym(rust_dom *dom, lib *library, char const *name)
: val(0),
library(library),
dom(dom)
{
library->ref();
uintptr_t handle = library->get_handle();
if (handle) {
#if defined(__WIN32__)
val = (uintptr_t)GetProcAddress((HMODULE)handle, _T(name));
#else
val = (uintptr_t)dlsym((void*)handle, name);
#endif
DLOG(dom, cache, "resolved symbol '%s' to 0x%" PRIxPTR,
name, val);
} else {
DLOG_ERR(dom, cache, "unresolved symbol '%s', null lib handle\n"
"(did you omit a -L flag?)", name);
}
}
rust_crate_cache::c_sym::~c_sym() {
DLOG(dom, cache,
"~rust_crate_cache::c_sym(0x%" PRIxPTR ")", val);
library->deref();
}
uintptr_t
rust_crate_cache::c_sym::get_val() {
return val;
}
rust_crate_cache::rust_sym::rust_sym(rust_dom *dom,
rust_crate const *curr_crate,
c_sym *crate_sym,
char const **path)
: val(0),
crate_sym(crate_sym),
dom(dom)
{
crate_sym->ref();
typedef rust_crate_reader::die die;
rust_crate const *crate = (rust_crate*)crate_sym->get_val();
if (!crate) {
DLOG_ERR(dom, cache, "failed to resolve symbol, null crate symbol");
return;
}
rust_crate_reader rdr(dom, crate);
bool found_root = false;
bool found_leaf = false;
for (die d = rdr.dies.first_die();
!(found_root || d.is_null());
d = d.next_sibling()) {
die t1 = d;
die t2 = d;
for (char const **c = crate_rel(curr_crate, path);
(*c
&& !t1.is_null()
&& t1.find_child_by_name(crate_rel(curr_crate, *c), t2));
++c, t1=t2) {
DLOG(dom, dwarf, "matched die <0x%" PRIxPTR
">, child '%s' = die<0x%" PRIxPTR ">",
t1.off, crate_rel(curr_crate, *c), t2.off);
found_root = found_root || true;
if (!*(c+1) && t2.find_num_attr(DW_AT_low_pc, val)) {
DLOG(dom, dwarf, "found relative address: 0x%" PRIxPTR, val);
DLOG(dom, dwarf, "plus image-base 0x%" PRIxPTR,
crate->get_image_base());
val += crate->get_image_base();
found_leaf = true;
break;
}
}
if (found_root || found_leaf)
break;
}
if (found_leaf) {
DLOG(dom, cache, "resolved symbol to 0x%" PRIxPTR, val);
} else {
DLOG_ERR(dom, cache, "failed to resolve symbol");
}
}
rust_crate_cache::rust_sym::~rust_sym() {
DLOG(dom, cache,
"~rust_crate_cache::rust_sym(0x%" PRIxPTR ")", val);
crate_sym->deref();
}
uintptr_t
rust_crate_cache::rust_sym::get_val() {
return val;
}
static inline void
adjust_disp(uintptr_t &disp, const void *oldp, const void *newp)
{
if (disp) {
disp += (uintptr_t)oldp;
disp -= (uintptr_t)newp;
}
}
type_desc *
rust_crate_cache::get_type_desc(size_t size,
size_t align,
size_t n_descs,
type_desc const **descs)
{
I(dom, n_descs > 1);
type_desc *td = NULL;
size_t keysz = n_descs * sizeof(type_desc*);
HASH_FIND(hh, this->type_descs, descs, keysz, td);
if (td) {
DLOG(dom, cache, "rust_crate_cache::get_type_desc hit");
return td;
}
DLOG(dom, cache, "rust_crate_cache::get_type_desc miss");
td = (type_desc*) dom->malloc(sizeof(type_desc) + keysz);
if (!td)
return NULL;
// By convention, desc 0 is the root descriptor.
// but we ignore the size and alignment of it and use the
// passed-in, computed values.
memcpy(td, descs[0], sizeof(type_desc));
td->first_param = &td->descs[1];
td->size = size;
td->align = align;
for (size_t i = 0; i < n_descs; ++i) {
DLOG(dom, cache,
"rust_crate_cache::descs[%" PRIdPTR "] = 0x%" PRIxPTR,
i, descs[i]);
td->descs[i] = descs[i];
// FIXME (issue #136): Below is a miscalculation.
td->is_stateful |= descs[i]->is_stateful;
}
HASH_ADD(hh, this->type_descs, descs, keysz, td);
return td;
}
rust_crate_cache::rust_crate_cache(rust_dom *dom,
rust_crate const *crate)
: rust_syms((rust_sym**)
dom->calloc(sizeof(rust_sym*) * crate->n_rust_syms)),
c_syms((c_sym**) dom->calloc(sizeof(c_sym*) * crate->n_c_syms)),
libs((lib**) dom->calloc(sizeof(lib*) * crate->n_libs)),
type_descs(NULL),
crate(crate),
dom(dom),
idx(0)
{
I(dom, rust_syms);
I(dom, c_syms);
I(dom, libs);
}
void
rust_crate_cache::flush() {
DLOG(dom, cache, "rust_crate_cache::flush()");
for (size_t i = 0; i < crate->n_rust_syms; ++i) {
rust_sym *s = rust_syms[i];
if (s) {
DLOG(dom, cache,
"rust_crate_cache::flush() deref rust_sym %"
PRIdPTR " (rc=%" PRIdPTR ")", i, s->ref_count);
s->deref();
}
rust_syms[i] = NULL;
}
for (size_t i = 0; i < crate->n_c_syms; ++i) {
c_sym *s = c_syms[i];
if (s) {
DLOG(dom, cache,
"rust_crate_cache::flush() deref c_sym %"
PRIdPTR " (rc=%" PRIdPTR ")", i, s->ref_count);
s->deref();
}
c_syms[i] = NULL;
}
for (size_t i = 0; i < crate->n_libs; ++i) {
lib *l = libs[i];
if (l) {
DLOG(dom, cache, "rust_crate_cache::flush() deref lib %"
PRIdPTR " (rc=%" PRIdPTR ")", i, l->ref_count);
l->deref();
}
libs[i] = NULL;
}
while (type_descs) {
type_desc *d = type_descs;
HASH_DEL(type_descs, d);
DLOG(dom, mem, "rust_crate_cache::flush() tydesc %" PRIxPTR, d);
dom->free(d);
}
}
rust_crate_cache::~rust_crate_cache()
{
flush();
dom->free(rust_syms);
dom->free(c_syms);
dom->free(libs);
}
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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