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#include "rust_internal.h"
bool
rust_crate_reader::mem_reader::is_ok()
{
return ok;
}
bool
rust_crate_reader::mem_reader::at_end()
{
return pos == mem.lim;
}
void
rust_crate_reader::mem_reader::fail()
{
ok = false;
}
void
rust_crate_reader::mem_reader::reset()
{
pos = mem.base;
ok = true;
}
rust_crate_reader::mem_reader::mem_reader(rust_crate::mem_area &m)
: mem(m),
ok(true),
pos(m.base)
{}
size_t
rust_crate_reader::mem_reader::tell_abs()
{
return pos;
}
size_t
rust_crate_reader::mem_reader::tell_off()
{
return pos - mem.base;
}
void
rust_crate_reader::mem_reader::seek_abs(uintptr_t p)
{
if (!ok || p < mem.base || p >= mem.lim)
ok = false;
else
pos = p;
}
void
rust_crate_reader::mem_reader::seek_off(uintptr_t p)
{
seek_abs(p + mem.base);
}
bool
rust_crate_reader::mem_reader::adv_zstr(size_t sz)
{
sz = 0;
while (ok) {
char c = 0;
get(c);
++sz;
if (c == '\0')
return true;
}
return false;
}
bool
rust_crate_reader::mem_reader::get_zstr(char const *&c, size_t &sz)
{
if (!ok)
return false;
c = (char const *)(pos);
return adv_zstr(sz);
}
void
rust_crate_reader::mem_reader::adv(size_t amt)
{
if (pos < mem.base
|| pos >= mem.lim
|| pos + amt > mem.lim)
ok = false;
if (!ok)
return;
// mem.DLOG(dom, mem, "adv %d bytes", amt);
pos += amt;
ok &= !at_end();
I(mem.dom, at_end() || (mem.base <= pos && pos < mem.lim));
}
rust_crate_reader::abbrev::abbrev(rust_dom *dom,
uintptr_t body_off,
size_t body_sz,
uintptr_t tag,
uint8_t has_children) :
dom(dom),
body_off(body_off),
tag(tag),
has_children(has_children),
idx(0)
{}
rust_crate_reader::abbrev_reader::abbrev_reader
(rust_crate::mem_area &abbrev_mem)
: mem_reader(abbrev_mem),
abbrevs(abbrev_mem.dom)
{
rust_dom *dom = mem.dom;
while (is_ok() && !at_end()) {
// DLOG(dom, dwarf, "reading new abbrev at 0x%" PRIxPTR,
// tell_off());
uintptr_t idx, tag;
uint8_t has_children = 0;
get_uleb(idx);
get_uleb(tag);
get(has_children);
uintptr_t attr, form;
size_t body_off = tell_off();
while (is_ok() && step_attr_form_pair(attr, form));
// DLOG(dom, dwarf,
// "finished scanning attr/form pairs, pos=0x%"
// PRIxPTR ", lim=0x%" PRIxPTR ", is_ok=%d, at_end=%d",
// pos, mem.lim, is_ok(), at_end());
if (is_ok() || at_end()) {
DLOG(dom, dwarf, "read abbrev: %" PRIdPTR, idx);
I(dom, idx = abbrevs.length() + 1);
abbrevs.push(new (dom) abbrev(dom, body_off,
tell_off() - body_off,
tag, has_children));
}
}
}
rust_crate_reader::abbrev *
rust_crate_reader::abbrev_reader::get_abbrev(size_t i) {
i -= 1;
if (i < abbrevs.length())
return abbrevs[i];
return NULL;
}
bool
rust_crate_reader::abbrev_reader::step_attr_form_pair(uintptr_t &attr,
uintptr_t &form)
{
attr = 0;
form = 0;
// mem.DLOG(dom, dwarf, "reading attr/form pair at 0x%" PRIxPTR,
// tell_off());
get_uleb(attr);
get_uleb(form);
// mem.DLOG(dom, dwarf, "attr 0x%" PRIxPTR ", form 0x%" PRIxPTR,
// attr, form);
return ! (attr == 0 && form == 0);
}
rust_crate_reader::abbrev_reader::~abbrev_reader() {
while (abbrevs.length()) {
delete abbrevs.pop();
}
}
bool
rust_crate_reader::attr::is_numeric() const
{
switch (form) {
case DW_FORM_ref_addr:
case DW_FORM_addr:
case DW_FORM_data4:
case DW_FORM_data1:
case DW_FORM_flag:
return true;
default:
break;
}
return false;
}
bool
rust_crate_reader::attr::is_string() const
{
return form == DW_FORM_string;
}
size_t
rust_crate_reader::attr::get_ssz(rust_dom *dom) const
{
I(dom, is_string());
return val.str.sz;
}
char const *
rust_crate_reader::attr::get_str(rust_dom *dom) const
{
I(dom, is_string());
return val.str.s;
}
uintptr_t
rust_crate_reader::attr::get_num(rust_dom *dom) const
{
I(dom, is_numeric());
return val.num;
}
bool
rust_crate_reader::attr::is_unknown() const {
return !(is_numeric() || is_string());
}
rust_crate_reader::rust_crate_reader(rust_dom *dom,
rust_crate const *crate)
: dom(dom),
abbrev_mem(crate->get_debug_abbrev(dom)),
abbrevs(abbrev_mem),
die_mem(crate->get_debug_info(dom))
{
DLOG(dom, mem, "crate_reader on crate: 0x%" PRIxPTR, this);
DLOG(dom, mem, "debug_abbrev: 0x%" PRIxPTR, abbrev_mem.base);
DLOG(dom, mem, "debug_info: 0x%" PRIxPTR, die_mem.base);
}
//
// 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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