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//===-- WatchpointResource.cpp --------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <assert.h>
#include "lldb/Breakpoint/WatchpointResource.h"
#include "lldb/Utility/Stream.h"
#include <algorithm>
using namespace lldb;
using namespace lldb_private;
WatchpointResource::WatchpointResource(lldb::addr_t addr, size_t size,
bool read, bool write)
: m_id(GetNextID()), m_addr(addr), m_size(size),
m_watch_read(read), m_watch_write(write) {}
WatchpointResource::~WatchpointResource() {
std::lock_guard<std::mutex> guard(m_constituents_mutex);
m_constituents.clear();
}
addr_t WatchpointResource::GetLoadAddress() const { return m_addr; }
size_t WatchpointResource::GetByteSize() const { return m_size; }
bool WatchpointResource::WatchpointResourceRead() const { return m_watch_read; }
bool WatchpointResource::WatchpointResourceWrite() const {
return m_watch_write;
}
void WatchpointResource::SetType(bool read, bool write) {
m_watch_read = read;
m_watch_write = write;
}
wp_resource_id_t WatchpointResource::GetID() const { return m_id; }
bool WatchpointResource::Contains(addr_t addr) {
if (addr >= m_addr && addr < m_addr + m_size)
return true;
return false;
}
void WatchpointResource::AddConstituent(const WatchpointSP &wp_sp) {
std::lock_guard<std::mutex> guard(m_constituents_mutex);
m_constituents.push_back(wp_sp);
}
void WatchpointResource::RemoveConstituent(WatchpointSP &wp_sp) {
std::lock_guard<std::mutex> guard(m_constituents_mutex);
auto it = llvm::find(m_constituents, wp_sp);
if (it != m_constituents.end())
m_constituents.erase(it);
}
size_t WatchpointResource::GetNumberOfConstituents() {
std::lock_guard<std::mutex> guard(m_constituents_mutex);
return m_constituents.size();
}
bool WatchpointResource::ConstituentsContains(const WatchpointSP &wp_sp) {
return ConstituentsContains(wp_sp.get());
}
bool WatchpointResource::ConstituentsContains(const Watchpoint *wp) {
std::lock_guard<std::mutex> guard(m_constituents_mutex);
return llvm::any_of(m_constituents,
[&wp](const WatchpointSP &x) { return x.get() == wp; });
}
WatchpointSP WatchpointResource::GetConstituentAtIndex(size_t idx) {
std::lock_guard<std::mutex> guard(m_constituents_mutex);
assert(idx < m_constituents.size());
if (idx >= m_constituents.size())
return {};
return m_constituents[idx];
}
WatchpointResource::WatchpointCollection
WatchpointResource::CopyConstituentsList() {
std::lock_guard<std::mutex> guard(m_constituents_mutex);
return m_constituents;
}
bool WatchpointResource::ShouldStop(StoppointCallbackContext *context) {
// LWP_TODO: Need to poll all Watchpoint constituents and see if
// we should stop, like BreakpointSites do.
#if 0
m_hit_counter.Increment();
// ShouldStop can do a lot of work, and might even come back and hit
// this breakpoint site again. So don't hold the m_constituents_mutex the
// whole while. Instead make a local copy of the collection and call
// ShouldStop on the copy.
WatchpointResourceCollection constituents_copy;
{
std::lock_guard<std::recursive_mutex> guard(m_constituents_mutex);
constituents_copy = m_constituents;
}
return constituents_copy.ShouldStop(context);
#endif
return true;
}
void WatchpointResource::Dump(Stream *s) const {
s->Printf("addr = 0x%8.8" PRIx64 " size = %zu", m_addr, m_size);
}
wp_resource_id_t WatchpointResource::GetNextID() {
static wp_resource_id_t g_next_id = 0;
return ++g_next_id;
}
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