| //===-- DNBBreakpoint.h -----------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Created by Greg Clayton on 6/29/07. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef __DNBBreakpoint_h__ |
| #define __DNBBreakpoint_h__ |
| |
| #include <list> |
| |
| #include "DNBDefs.h" |
| |
| class DNBBreakpoint |
| { |
| public: |
| DNBBreakpoint(nub_addr_t m_addr, nub_size_t byte_size, nub_thread_t tid, bool hardware); |
| ~DNBBreakpoint(); |
| |
| nub_break_t GetID() const { return m_breakID; } |
| nub_size_t ByteSize() const { return m_byte_size; } |
| uint8_t * SavedOpcodeBytes() { return &m_opcode[0]; } |
| const uint8_t * |
| SavedOpcodeBytes() const { return &m_opcode[0]; } |
| nub_addr_t Address() const { return m_addr; } |
| nub_thread_t ThreadID() const { return m_tid; } |
| bool IsEnabled() const { return m_enabled; } |
| bool IntersectsRange(nub_addr_t addr, nub_size_t size, nub_addr_t *intersect_addr, nub_size_t *intersect_size, nub_size_t *opcode_offset) const |
| { |
| // We only use software traps for software breakpoints |
| if (IsBreakpoint() && IsEnabled() && !IsHardware()) |
| { |
| if (m_byte_size > 0) |
| { |
| const nub_addr_t bp_end_addr = m_addr + m_byte_size; |
| const nub_addr_t end_addr = addr + size; |
| // Is the breakpoint end address before the passed in start address? |
| if (bp_end_addr <= addr) |
| return false; |
| // Is the breakpoint start address after passed in end address? |
| if (end_addr <= m_addr) |
| return false; |
| if (intersect_addr || intersect_size || opcode_offset) |
| { |
| if (m_addr < addr) |
| { |
| if (intersect_addr) |
| *intersect_addr = addr; |
| if (intersect_size) |
| *intersect_size = std::min<nub_addr_t>(bp_end_addr, end_addr) - addr; |
| if (opcode_offset) |
| *opcode_offset = addr - m_addr; |
| } |
| else |
| { |
| if (intersect_addr) |
| *intersect_addr = m_addr; |
| if (intersect_size) |
| *intersect_size = std::min<nub_addr_t>(bp_end_addr, end_addr) - m_addr; |
| if (opcode_offset) |
| *opcode_offset = 0; |
| } |
| } |
| return true; |
| } |
| } |
| return false; |
| } |
| void SetEnabled(bool enabled) |
| { |
| if (!enabled) |
| SetHardwareIndex(INVALID_NUB_HW_INDEX); |
| m_enabled = enabled; |
| } |
| void SetIsWatchpoint (uint32_t type) |
| { |
| m_is_watchpoint = 1; |
| m_watch_read = (type & WATCH_TYPE_READ) != 0; |
| m_watch_write = (type & WATCH_TYPE_WRITE) != 0; |
| } |
| bool IsBreakpoint() const { return m_is_watchpoint == 0; } |
| bool IsWatchpoint() const { return m_is_watchpoint == 1; } |
| bool WatchpointRead() const { return m_watch_read != 0; } |
| bool WatchpointWrite() const { return m_watch_write != 0; } |
| bool HardwarePreferred() const { return m_hw_preferred; } |
| bool IsHardware() const { return m_hw_index != INVALID_NUB_HW_INDEX; } |
| uint32_t GetHardwareIndex() const { return m_hw_index; } |
| void SetHardwareIndex(uint32_t hw_index) { m_hw_index = hw_index; } |
| // StateType GetState() const { return m_state; } |
| // void SetState(StateType newState) { m_state = newState; } |
| int32_t GetHitCount() const { return m_hit_count; } |
| int32_t GetIgnoreCount() const { return m_ignore_count; } |
| void SetIgnoreCount(int32_t n) { m_ignore_count = n; } |
| bool BreakpointHit(nub_process_t pid, nub_thread_t tid); |
| void SetCallback(DNBCallbackBreakpointHit callback, void *callback_baton); |
| void Dump() const; |
| |
| private: |
| nub_break_t m_breakID; // The unique identifier for this breakpoint |
| nub_thread_t m_tid; // Thread ID for the breakpoint (can be INVALID_NUB_THREAD for all threads) |
| nub_size_t m_byte_size; // Length in bytes of the breakpoint if set in memory |
| uint8_t m_opcode[8]; // Saved opcode bytes |
| nub_addr_t m_addr; // Address of this breakpoint |
| uint32_t m_enabled:1, // Flags for this breakpoint |
| m_hw_preferred:1, // 1 if this point has been requested to be set using hardware (which may fail due to lack of resources) |
| m_is_watchpoint:1, // 1 if this is a watchpoint |
| m_watch_read:1, // 1 if we stop when the watched data is read from |
| m_watch_write:1; // 1 if we stop when the watched data is written to |
| uint32_t m_hw_index; // The hardware resource index for this breakpoint/watchpoint |
| int32_t m_hit_count; // Number of times this breakpoint has been hit |
| int32_t m_ignore_count; // Number of times to ignore this breakpoint |
| DNBCallbackBreakpointHit |
| m_callback; // Callback to call when this breakpoint gets hit |
| void * m_callback_baton; // Callback user data to pass to callback |
| |
| static nub_break_t GetNextID(); |
| |
| }; |
| |
| |
| class DNBBreakpointList |
| { |
| public: |
| DNBBreakpointList(); |
| ~DNBBreakpointList(); |
| |
| nub_break_t Add (const DNBBreakpoint& bp); |
| nub_break_t FindIDByAddress (nub_addr_t addr); |
| bool ShouldStop (nub_process_t pid, nub_thread_t tid, nub_break_t breakID); |
| bool Remove (nub_break_t breakID); |
| bool SetCallback (nub_break_t breakID, DNBCallbackBreakpointHit callback, void *callback_baton); |
| DNBBreakpoint * FindByAddress (nub_addr_t addr); |
| const DNBBreakpoint * FindByAddress (nub_addr_t addr) const; |
| DNBBreakpoint * FindByID (nub_break_t breakID); |
| const DNBBreakpoint * FindByID (nub_break_t breakID) const; |
| void Dump () const; |
| |
| size_t Size() const { return m_breakpoints.size(); } |
| DNBBreakpoint * GetByIndex (uint32_t i); |
| const DNBBreakpoint * GetByIndex (uint32_t i) const; |
| |
| protected: |
| typedef std::list<DNBBreakpoint> collection; |
| typedef collection::iterator iterator; |
| typedef collection::const_iterator const_iterator; |
| iterator GetBreakIDIterator(nub_break_t breakID); |
| const_iterator GetBreakIDConstIterator(nub_break_t breakID) const; |
| collection m_breakpoints; |
| }; |
| |
| #endif |
| |
