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L4Sys: fix use of L4SYS_NUMINSTR

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* L4SYS_NUMINSTR counts the instructions that were selected for
  injection and is used by the campaign server to generate experiments
* L4SYS_TOTINSTR counts the total number of instructions executed.
  It is used by the experiment to determine the timeout value.

Change-Id: Ibf37aea2a1f5ad5afad2b1232ce22fe070b08490
This commit is contained in:
Bjoern Doebel
2013-08-09 14:59:45 +02:00
parent 2c35ac6235
commit ed772429f9
3 changed files with 44 additions and 15 deletions
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28
src/experiments/l4-sys/experiment.cc
View File

@ -118,8 +118,8 @@ void L4SysExperiment::logInjection() {
address_t injection_ip = param->msg.injection_ip();
log << "job " << id << " exp_type " << exp_type << endl;
log << "inject @ ip " << injection_ip << " (offset " << dec << instr_offset
<< ")" << " bit " << bit_offset << endl;
log << "inject @ ip " << hex << injection_ip << " (offset " << dec << instr_offset
<< ")" << " bit " << bit_offset << endl;
}
BaseListener *L4SysExperiment::singleStep(bool preserveAddressSpace) {
@ -257,6 +257,8 @@ bool L4SysExperiment::run() {
reinterpret_cast<char const*>(calculateInstructionAddress()))) {
accepted++;
TraceInstr new_instr;
log << "writing IP " << hex << curr_addr << " counter "
<< dec << times_called << endl;
new_instr.trigger_addr = curr_addr;
new_instr.bp_counter = times_called;
@ -267,7 +269,7 @@ bool L4SysExperiment::run() {
log << "saving instructions triggered during normal execution" << endl;
instr_list_file.close();
log << "test function calculation position reached after "
<< dec << count << " instructions; " << accepted << " accepted" << endl;
<< dec << count << " instructions; " << accepted << " accepted" << endl;
#else
int count = 0;
int ul = 0, kernel = 0;
@ -353,6 +355,9 @@ bool L4SysExperiment::run() {
int bit_offset = param->msg.bit_offset();
int exp_type = param->msg.exp_type();
log << " got job parameters: offs " << hex << instr_offset
<< " bit " << bit_offset << " exp " << exp_type << endl;
#ifdef L4SYS_FILTER_INSTRUCTIONS
ifstream instr_list_file(L4SYS_INSTRUCTION_LIST, ios::binary);
@ -363,10 +368,18 @@ bool L4SysExperiment::run() {
TraceInstr curr_instr;
instr_list_file.seekg(instr_offset * sizeof(TraceInstr));
log << instr_list_file.eof() << " " << instr_list_file.bad() << " "
<< instr_list_file.fail() << endl;
if (instr_list_file.eof()) {
log << "Job parameters indicate position outside the traced instruction list." << endl;
terminate(1);
}
instr_list_file.read(reinterpret_cast<char*>(&curr_instr), sizeof(TraceInstr));
instr_list_file.close();
log << "setting watchpoint at " << hex << curr_instr.trigger_addr << endl;
bp.setWatchInstructionPointer(curr_instr.trigger_addr);
log << "setting bp counter " << hex << curr_instr.bp_counter << endl;
bp.setCounter(curr_instr.bp_counter);
#else
bp.setWatchInstructionPointer(ANY_ADDR);
@ -409,8 +422,9 @@ bool L4SysExperiment::run() {
// do the logging in case everything worked out
logInjection();
log << "register data: 0x" << hex << ((int) data) << " -> 0x"
<< ((int) newdata) << endl;
log << "IP " << hex << simulator.getCPU(0).getInstructionPointer()
<< " register data: 0x" << hex << ((int) data) << " -> 0x"
<< ((int) newdata) << endl;
} else if (exp_type == param->msg.IDCFLIP) {
// this is a twisted one
@ -626,11 +640,13 @@ bool L4SysExperiment::run() {
// aftermath
BPSingleListener ev_done(L4SYS_FUNC_EXIT, L4SYS_ADDRESS_SPACE);
simulator.addListener(&ev_done);
unsigned instr_left = L4SYS_NUMINSTR - instr_offset;
unsigned instr_left = L4SYS_TOTINSTR - instr_offset; // XXX offset is in NUMINSTR, TOTINSTR is higher
BPSingleListener ev_incomplete(ANY_ADDR, L4SYS_ADDRESS_SPACE);
ev_incomplete.setCounter(
static_cast<unsigned>(instr_left * 1.1));
simulator.addListener(&ev_incomplete);
TimerListener ev_timeout(calculateTimeout(instr_left));
simulator.addListener(&ev_timeout);

19
src/experiments/l4-sys/experimentInfo.hpp
View File

@ -5,11 +5,20 @@
#define MAX_INSTR_BYTES 15
// the bounds of the program (space, instructions and time)
#define L4SYS_ADDRESS_SPACE 0x1fe0000
#define L4SYS_FUNC_ENTRY 0x10025ca
#define L4SYS_FUNC_EXIT 0x1002810
#define L4SYS_ADDRESS_SPACE 0x1fd6e000
#define L4SYS_FUNC_ENTRY 0x01000200
#define L4SYS_FUNC_EXIT 0x01000245
// Instruction filtering: Allows to specify a range within
// which to perform injection experiments. If in doubt, set
// to the whole user-addressable area (0, 0xC0000000)
#define L4SYS_FILTER_INSTRUCTIONS 1
#define L4SYS_ADDRESS_LBOUND 0
#define L4SYS_ADDRESS_UBOUND 0xC0000000
// kernel: 2377547, userland: 79405472
#define L4SYS_NUMINSTR 81783019
#define L4SYS_NUMINSTR 3281
#define L4SYS_TOTINSTR 228218
#define L4SYS_BOCHS_IPS 5000000
// several file names used
@ -21,6 +30,6 @@
// flags
// 0 - preparation complete
// >0 - next step to execute
#define PREPARATION_STEP 0
#define PREPARATION_STEP 0
#endif // __L4SYS_EXPERIMENT_INFO_HPP__