150 lines
4.6 KiB
C++
150 lines
4.6 KiB
C++
/*
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* \file trc_ret_stack.cpp
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* \brief OpenCSD : trace decoder return stack feature.
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*
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* \copyright Copyright (c) 2017, ARM Limited. All Rights Reserved.
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*/
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/*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "common/trc_ret_stack.h"
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#ifdef TRC_RET_STACK_DEBUG
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#include <sstream>
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#include <iostream>
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#include "common/trc_component.h"
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#define LOG_POP(A,O,I) LogOp("Pop",A,O,I)
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#define LOG_PUSH(A,O,I) LogOp("Push",A,O,I)
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#define LOG_FLUSH() LogOp("Flush",0,-1000,(const ocsd_isa)0)
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// uncomment for forced std::cout log, bypassing normal library debug logger.
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// useful perhaps when perf is decoding w/o printing.
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// #define FORCE_STD_COUT
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#else
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#define LOG_POP(A,O,I)
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#define LOG_PUSH(A,O,I)
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#define LOG_FLUSH()
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#endif
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TrcAddrReturnStack::TrcAddrReturnStack() :
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m_active(false),
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m_pop_pending(false),
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head_idx(0),
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num_entries(0)
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{
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#ifdef TRC_RET_STACK_DEBUG
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m_p_debug_logger = 0;
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#endif
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}
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void TrcAddrReturnStack::push(const ocsd_vaddr_t addr, const ocsd_isa isa)
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{
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if (is_active())
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{
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head_idx++;
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head_idx &= 0xF;
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m_stack[head_idx].ret_addr = addr;
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m_stack[head_idx].ret_isa = isa;
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num_entries++;
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if (num_entries > 16)
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num_entries = 16;
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LOG_PUSH(addr,0,isa);
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m_pop_pending = false;
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}
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}
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ocsd_vaddr_t TrcAddrReturnStack::pop(ocsd_isa &isa)
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{
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ocsd_vaddr_t addr = (ocsd_vaddr_t)-1;
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if (is_active())
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{
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if (num_entries > 0)
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{
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addr = m_stack[head_idx].ret_addr;
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isa = m_stack[head_idx].ret_isa;
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head_idx--;
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head_idx &= 0xF;
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}
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num_entries--;
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LOG_POP(addr,1,isa);
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m_pop_pending = false;
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}
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return addr;
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}
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void TrcAddrReturnStack::flush()
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{
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num_entries = 0;
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m_pop_pending = false;
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LOG_FLUSH();
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}
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#ifdef TRC_RET_STACK_DEBUG
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void TrcAddrReturnStack::LogOp(const char * pszOpString, ocsd_vaddr_t addr, int head_off, ocsd_isa isa)
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{
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static const char *isa_names[] =
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{
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"A32", /**< V7 ARM 32, V8 AArch32 */
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"T32", /**< Thumb2 -> 16/32 bit instructions */
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"A64", /**< V8 AArch64 */
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"TEE", /**< Thumb EE - unsupported */
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"JZL", /**< Jazelle - unsupported in trace */
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"custom", /**< Instruction set - custom arch decoder */
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"unknown" /**< ISA not yet known */
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};
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if (m_p_debug_logger)
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{
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std::ostringstream oss;
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if(head_off == -1000)
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{
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oss << "Return stack " << pszOpString << "\n";
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}
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else
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{
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int name_idx = (int)isa;
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if (name_idx > 6)
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name_idx = 6;
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oss << "Return stack " << pszOpString << "[" << std::dec << (head_idx+head_off) << "](0x" << std::hex << addr << "), " << isa_names[name_idx] << ";";
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oss << "current entries = " << std::dec << num_entries << ";";
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oss << "new head idx = " << head_idx << ";";
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oss << "pop pend (pre op) = " << (m_pop_pending ? "true\n" : "false\n");
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}
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#ifdef FORCE_STD_COUT
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std::cout << oss.str();
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std::cout.flush();
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#endif
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m_p_debug_logger->LogDefMessage(oss.str());
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}
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}
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#endif
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/* End of File trc_ret_stack.cpp */
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