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Diffstat (limited to 'tools/debugserver/source/DNBBreakpoint.h')
| -rw-r--r-- | tools/debugserver/source/DNBBreakpoint.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/tools/debugserver/source/DNBBreakpoint.h b/tools/debugserver/source/DNBBreakpoint.h new file mode 100644 index 000000000000..c764dbd6cf29 --- /dev/null +++ b/tools/debugserver/source/DNBBreakpoint.h @@ -0,0 +1,165 @@ +//===-- 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 <mach/mach.h> + +#include <map> +#include <vector> + +#include "DNBDefs.h" + +class MachProcess; + +class DNBBreakpoint +{ +public: + DNBBreakpoint(nub_addr_t m_addr, nub_size_t byte_size, bool hardware); + ~DNBBreakpoint(); + + 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; } + void Dump() const; + uint32_t Retain () + { + return ++m_retain_count; + } + uint32_t Release () + { + if (m_retain_count == 0) + return 0; + return --m_retain_count; + } + +private: + uint32_t m_retain_count; // Each breakpoint is maintained by address and is ref counted in case multiple people set a breakpoint at the same address + uint32_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 +}; + + +class DNBBreakpointList +{ +public: + DNBBreakpointList(); + ~DNBBreakpointList(); + + DNBBreakpoint * Add (nub_addr_t addr, nub_size_t length, bool hardware); + bool Remove (nub_addr_t addr); + DNBBreakpoint * FindByAddress (nub_addr_t addr); + const DNBBreakpoint * FindByAddress (nub_addr_t addr) const; + + size_t FindBreakpointsThatOverlapRange (nub_addr_t addr, + nub_addr_t size, + std::vector<DNBBreakpoint *> &bps); + + void Dump () const; + + size_t Size() const { return m_breakpoints.size(); } + void DisableAll (); + + void RemoveTrapsFromBuffer (nub_addr_t addr, + nub_size_t size, + void *buf) const; + + void DisableAllBreakpoints (MachProcess *process); + void DisableAllWatchpoints(MachProcess *process); + void RemoveDisabled (); +protected: + typedef std::map<nub_addr_t, DNBBreakpoint> collection; + typedef collection::iterator iterator; + typedef collection::const_iterator const_iterator; + collection m_breakpoints; +}; + +#endif + |