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Add simple function-tracing support. Prints a message

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every time the committed PC changes from one symbol scope
to another.
Set function_trace=y on target CPU to enable.
To defer start, use function_trace_start=<tick>
(in addition to setting function_trace=y).

cpu/base_cpu.cc:
cpu/base_cpu.hh:
    Add simple function-tracing support.
cpu/simple_cpu/simple_cpu.cc:
    Add function_trace, function_trace_start params
    Call traceFunctions() on instruction completion
cpu/simple_cpu/simple_cpu.hh:
    Add function_trace, function_trace_start params

--HG--
extra : convert_revision : 8a7f84028ccbaee585253629007f32fc8eae35e1
This commit is contained in:
Steve Reinhardt
2004-11-16 17:20:38 -05:00
parent 34b2014463
commit c9b0204e28
4 changed files with 110 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
cpu/base_cpu.cc
View File

@@ -30,10 +30,11 @@
#include <sstream>
#include <iostream>
#include "cpu/base_cpu.hh"
#include "base/cprintf.hh"
#include "cpu/exec_context.hh"
#include "base/loader/symtab.hh"
#include "base/misc.hh"
#include "cpu/base_cpu.hh"
#include "cpu/exec_context.hh"
#include "sim/param.hh"
#include "sim/sim_events.hh"
@@ -52,7 +53,8 @@ BaseCPU::BaseCPU(const string &_name, int _number_of_threads, bool _def_reg,
Counter max_insts_all_threads,
Counter max_loads_any_thread,
Counter max_loads_all_threads,
System *_system, Tick freq)
System *_system, Tick freq,
bool _function_trace, Tick _function_trace_start)
: SimObject(_name), frequency(freq), checkInterrupts(true),
deferRegistration(_def_reg), number_of_threads(_number_of_threads),
system(_system)
@@ -61,7 +63,8 @@ BaseCPU::BaseCPU(const string &_name, int _number_of_threads, bool _def_reg,
Counter max_insts_any_thread,
Counter max_insts_all_threads,
Counter max_loads_any_thread,
Counter max_loads_all_threads)
Counter max_loads_all_threads,
bool _function_trace, Tick _function_trace_start)
: SimObject(_name), deferRegistration(_def_reg),
number_of_threads(_number_of_threads)
#endif
@@ -126,8 +129,39 @@ BaseCPU::BaseCPU(const string &_name, int _number_of_threads, bool _def_reg,
memset(interrupts, 0, sizeof(interrupts));
intstatus = 0;
#endif
functionTracingEnabled = false;
if (_function_trace) {
std::string filename = csprintf("ftrace.%s", name());
functionTraceStream = makeOutputStream(filename);
currentFunctionStart = currentFunctionEnd = 0;
functionEntryTick = _function_trace_start;
if (_function_trace_start == 0) {
functionTracingEnabled = true;
} else {
Event *e =
new EventWrapper<BaseCPU, &BaseCPU::enableFunctionTrace>(this,
true);
e->schedule(_function_trace_start);
}
}
}
void
BaseCPU::enableFunctionTrace()
{
functionTracingEnabled = true;
}
BaseCPU::~BaseCPU()
{
if (functionTracingEnabled)
closeOutputStream(functionTraceStream);
}
void
BaseCPU::init()
{
@@ -267,4 +301,32 @@ BaseCPU::unserialize(Checkpoint *cp, const std::string &section)
#endif // FULL_SYSTEM
void
BaseCPU::traceFunctionsInternal(Addr pc)
{
if (!debugSymbolTable)
return;
// if pc enters different function, print new function symbol and
// update saved range. Otherwise do nothing.
if (pc < currentFunctionStart || pc >= currentFunctionEnd) {
string sym_str;
bool found = debugSymbolTable->findNearestSymbol(pc, sym_str,
currentFunctionStart,
currentFunctionEnd);
if (!found) {
// no symbol found: use addr as label
sym_str = csprintf("0x%x", pc);
currentFunctionStart = pc;
currentFunctionEnd = pc + 1;
}
ccprintf(*functionTraceStream, " (%d)\n%d: %s",
curTick - functionEntryTick, curTick, sym_str);
functionEntryTick = curTick;
}
}
DEFINE_SIM_OBJECT_CLASS_NAME("BaseCPU", BaseCPU)