blob: d0e867957dc010686d529db653aa245bfbafc033 [file] [log] [blame]
//===-------------------------- debug.cpp ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#define _LIBCPP_DEBUG 1
#include "__config"
#include "__debug"
#include "functional"
#include "algorithm"
#include "__hash_table"
#include "mutex"
_LIBCPP_BEGIN_NAMESPACE_STD
_LIBCPP_FUNC_VIS
__libcpp_db*
__get_db()
{
static __libcpp_db db;
return &db;
}
_LIBCPP_FUNC_VIS
const __libcpp_db*
__get_const_db()
{
return __get_db();
}
namespace
{
typedef mutex mutex_type;
typedef lock_guard<mutex_type> WLock;
typedef lock_guard<mutex_type> RLock;
mutex_type&
mut()
{
static mutex_type m;
return m;
}
} // unnamed namespace
__i_node::~__i_node()
{
if (__next_)
{
__next_->~__i_node();
free(__next_);
}
}
__c_node::~__c_node()
{
free(beg_);
if (__next_)
{
__next_->~__c_node();
free(__next_);
}
}
__libcpp_db::__libcpp_db()
: __cbeg_(nullptr),
__cend_(nullptr),
__csz_(0),
__ibeg_(nullptr),
__iend_(nullptr),
__isz_(0)
{
}
__libcpp_db::~__libcpp_db()
{
if (__cbeg_)
{
for (__c_node** p = __cbeg_; p != __cend_; ++p)
{
if (*p != nullptr)
{
(*p)->~__c_node();
free(*p);
}
}
free(__cbeg_);
}
if (__ibeg_)
{
for (__i_node** p = __ibeg_; p != __iend_; ++p)
{
if (*p != nullptr)
{
(*p)->~__i_node();
free(*p);
}
}
free(__ibeg_);
}
}
void*
__libcpp_db::__find_c_from_i(void* __i) const
{
RLock _(mut());
__i_node* i = __find_iterator(__i);
_LIBCPP_ASSERT(i != nullptr, "iterator not found in debug database.");
return i->__c_ != nullptr ? i->__c_->__c_ : nullptr;
}
void
__libcpp_db::__insert_ic(void* __i, const void* __c)
{
WLock _(mut());
if (__cbeg_ == __cend_)
return;
size_t hc = hash<const void*>()(__c) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* c = __cbeg_[hc];
if (c == nullptr)
return;
while (c->__c_ != __c)
{
c = c->__next_;
if (c == nullptr)
return;
}
__i_node* i = __insert_iterator(__i);
c->__add(i);
i->__c_ = c;
}
__c_node*
__libcpp_db::__insert_c(void* __c)
{
WLock _(mut());
if (__csz_ + 1 > static_cast<size_t>(__cend_ - __cbeg_))
{
size_t nc = __next_prime(2*static_cast<size_t>(__cend_ - __cbeg_) + 1);
__c_node** cbeg = static_cast<__c_node**>(calloc(nc, sizeof(void*)));
if (cbeg == nullptr)
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#else
abort();
#endif
for (__c_node** p = __cbeg_; p != __cend_; ++p)
{
__c_node* q = *p;
while (q != nullptr)
{
size_t h = hash<void*>()(q->__c_) % nc;
__c_node* r = q->__next_;
q->__next_ = cbeg[h];
cbeg[h] = q;
q = r;
}
}
free(__cbeg_);
__cbeg_ = cbeg;
__cend_ = __cbeg_ + nc;
}
size_t hc = hash<void*>()(__c) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* p = __cbeg_[hc];
__c_node* r = __cbeg_[hc] =
static_cast<__c_node*>(malloc(sizeof(__c_node)));
if (__cbeg_[hc] == nullptr)
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#else
abort();
#endif
r->__c_ = __c;
r->__next_ = p;
++__csz_;
return r;
}
void
__libcpp_db::__erase_i(void* __i)
{
WLock _(mut());
if (__ibeg_ != __iend_)
{
size_t hi = hash<void*>()(__i) % static_cast<size_t>(__iend_ - __ibeg_);
__i_node* p = __ibeg_[hi];
if (p != nullptr)
{
__i_node* q = nullptr;
while (p->__i_ != __i)
{
q = p;
p = p->__next_;
if (p == nullptr)
return;
}
if (q == nullptr)
__ibeg_[hi] = p->__next_;
else
q->__next_ = p->__next_;
__c_node* c = p->__c_;
free(p);
--__isz_;
if (c != nullptr)
c->__remove(p);
}
}
}
void
__libcpp_db::__invalidate_all(void* __c)
{
WLock _(mut());
if (__cend_ != __cbeg_)
{
size_t hc = hash<void*>()(__c) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* p = __cbeg_[hc];
if (p == nullptr)
return;
while (p->__c_ != __c)
{
p = p->__next_;
if (p == nullptr)
return;
}
while (p->end_ != p->beg_)
{
--p->end_;
(*p->end_)->__c_ = nullptr;
}
}
}
__c_node*
__libcpp_db::__find_c_and_lock(void* __c) const
{
mut().lock();
if (__cend_ == __cbeg_)
{
mut().unlock();
return nullptr;
}
size_t hc = hash<void*>()(__c) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* p = __cbeg_[hc];
if (p == nullptr)
{
mut().unlock();
return nullptr;
}
while (p->__c_ != __c)
{
p = p->__next_;
if (p == nullptr)
{
mut().unlock();
return nullptr;
}
}
return p;
}
__c_node*
__libcpp_db::__find_c(void* __c) const
{
size_t hc = hash<void*>()(__c) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* p = __cbeg_[hc];
_LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __find_c A");
while (p->__c_ != __c)
{
p = p->__next_;
_LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __find_c B");
}
return p;
}
void
__libcpp_db::unlock() const
{
mut().unlock();
}
void
__libcpp_db::__erase_c(void* __c)
{
WLock _(mut());
if (__cend_ != __cbeg_)
{
size_t hc = hash<void*>()(__c) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* p = __cbeg_[hc];
if (p == nullptr)
return;
__c_node* q = nullptr;
_LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __erase_c A");
while (p->__c_ != __c)
{
q = p;
p = p->__next_;
if (p == nullptr)
return;
_LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __erase_c B");
}
if (q == nullptr)
__cbeg_[hc] = p->__next_;
else
q->__next_ = p->__next_;
while (p->end_ != p->beg_)
{
--p->end_;
(*p->end_)->__c_ = nullptr;
}
free(p->beg_);
free(p);
--__csz_;
}
}
void
__libcpp_db::__iterator_copy(void* __i, const void* __i0)
{
WLock _(mut());
__i_node* i = __find_iterator(__i);
__i_node* i0 = __find_iterator(__i0);
__c_node* c0 = i0 != nullptr ? i0->__c_ : nullptr;
if (i == nullptr && i0 != nullptr)
i = __insert_iterator(__i);
__c_node* c = i != nullptr ? i->__c_ : nullptr;
if (c != c0)
{
if (c != nullptr)
c->__remove(i);
if (i != nullptr)
{
i->__c_ = nullptr;
if (c0 != nullptr)
{
i->__c_ = c0;
i->__c_->__add(i);
}
}
}
}
bool
__libcpp_db::__dereferenceable(const void* __i) const
{
RLock _(mut());
__i_node* i = __find_iterator(__i);
return i != nullptr && i->__c_ != nullptr && i->__c_->__dereferenceable(__i);
}
bool
__libcpp_db::__decrementable(const void* __i) const
{
RLock _(mut());
__i_node* i = __find_iterator(__i);
return i != nullptr && i->__c_ != nullptr && i->__c_->__decrementable(__i);
}
bool
__libcpp_db::__addable(const void* __i, ptrdiff_t __n) const
{
RLock _(mut());
__i_node* i = __find_iterator(__i);
return i != nullptr && i->__c_ != nullptr && i->__c_->__addable(__i, __n);
}
bool
__libcpp_db::__subscriptable(const void* __i, ptrdiff_t __n) const
{
RLock _(mut());
__i_node* i = __find_iterator(__i);
return i != nullptr && i->__c_ != nullptr && i->__c_->__subscriptable(__i, __n);
}
bool
__libcpp_db::__less_than_comparable(const void* __i, const void* __j) const
{
RLock _(mut());
__i_node* i = __find_iterator(__i);
__i_node* j = __find_iterator(__j);
__c_node* ci = i != nullptr ? i->__c_ : nullptr;
__c_node* cj = j != nullptr ? j->__c_ : nullptr;
return ci != nullptr && ci == cj;
}
void
__libcpp_db::swap(void* c1, void* c2)
{
WLock _(mut());
size_t hc = hash<void*>()(c1) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* p1 = __cbeg_[hc];
_LIBCPP_ASSERT(p1 != nullptr, "debug mode internal logic error swap A");
while (p1->__c_ != c1)
{
p1 = p1->__next_;
_LIBCPP_ASSERT(p1 != nullptr, "debug mode internal logic error swap B");
}
hc = hash<void*>()(c2) % static_cast<size_t>(__cend_ - __cbeg_);
__c_node* p2 = __cbeg_[hc];
_LIBCPP_ASSERT(p2 != nullptr, "debug mode internal logic error swap C");
while (p2->__c_ != c2)
{
p2 = p2->__next_;
_LIBCPP_ASSERT(p2 != nullptr, "debug mode internal logic error swap D");
}
std::swap(p1->beg_, p2->beg_);
std::swap(p1->end_, p2->end_);
std::swap(p1->cap_, p2->cap_);
for (__i_node** p = p1->beg_; p != p1->end_; ++p)
(*p)->__c_ = p1;
for (__i_node** p = p2->beg_; p != p2->end_; ++p)
(*p)->__c_ = p2;
}
void
__libcpp_db::__insert_i(void* __i)
{
WLock _(mut());
__insert_iterator(__i);
}
void
__c_node::__add(__i_node* i)
{
if (end_ == cap_)
{
size_t nc = 2*static_cast<size_t>(cap_ - beg_);
if (nc == 0)
nc = 1;
__i_node** beg =
static_cast<__i_node**>(malloc(nc * sizeof(__i_node*)));
if (beg == nullptr)
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#else
abort();
#endif
if (nc > 1)
memcpy(beg, beg_, nc/2*sizeof(__i_node*));
free(beg_);
beg_ = beg;
end_ = beg_ + nc/2;
cap_ = beg_ + nc;
}
*end_++ = i;
}
// private api
_LIBCPP_HIDDEN
__i_node*
__libcpp_db::__insert_iterator(void* __i)
{
if (__isz_ + 1 > static_cast<size_t>(__iend_ - __ibeg_))
{
size_t nc = __next_prime(2*static_cast<size_t>(__iend_ - __ibeg_) + 1);
__i_node** ibeg = static_cast<__i_node**>(calloc(nc, sizeof(void*)));
if (ibeg == nullptr)
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#else
abort();
#endif
for (__i_node** p = __ibeg_; p != __iend_; ++p)
{
__i_node* q = *p;
while (q != nullptr)
{
size_t h = hash<void*>()(q->__i_) % nc;
__i_node* r = q->__next_;
q->__next_ = ibeg[h];
ibeg[h] = q;
q = r;
}
}
free(__ibeg_);
__ibeg_ = ibeg;
__iend_ = __ibeg_ + nc;
}
size_t hi = hash<void*>()(__i) % static_cast<size_t>(__iend_ - __ibeg_);
__i_node* p = __ibeg_[hi];
__i_node* r = __ibeg_[hi] =
static_cast<__i_node*>(malloc(sizeof(__i_node)));
if (r == nullptr)
#ifndef _LIBCPP_NO_EXCEPTIONS
throw bad_alloc();
#else
abort();
#endif
::new(r) __i_node(__i, p, nullptr);
++__isz_;
return r;
}
_LIBCPP_HIDDEN
__i_node*
__libcpp_db::__find_iterator(const void* __i) const
{
__i_node* r = nullptr;
if (__ibeg_ != __iend_)
{
size_t h = hash<const void*>()(__i) % static_cast<size_t>(__iend_ - __ibeg_);
for (__i_node* nd = __ibeg_[h]; nd != nullptr; nd = nd->__next_)
{
if (nd->__i_ == __i)
{
r = nd;
break;
}
}
}
return r;
}
_LIBCPP_HIDDEN
void
__c_node::__remove(__i_node* p)
{
__i_node** r = find(beg_, end_, p);
_LIBCPP_ASSERT(r != end_, "debug mode internal logic error __c_node::__remove");
if (--end_ != r)
memmove(r, r+1, static_cast<size_t>(end_ - r)*sizeof(__i_node*));
}
_LIBCPP_END_NAMESPACE_STD