diff options
Diffstat (limited to 'src/gpgpu-sim/gpu-sim.cc')
| -rw-r--r-- | src/gpgpu-sim/gpu-sim.cc | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/gpgpu-sim/gpu-sim.cc b/src/gpgpu-sim/gpu-sim.cc index 4da76f9..2b4ebe3 100644 --- a/src/gpgpu-sim/gpu-sim.cc +++ b/src/gpgpu-sim/gpu-sim.cc @@ -87,6 +87,8 @@ #include <string.h> #define MAX(a,b) (((a)>(b))?(a):(b)) +bool g_interactive_debugger_enabled=false; + extern unsigned L2_write_miss; extern unsigned L2_write_hit; extern unsigned L2_read_hit; @@ -204,6 +206,7 @@ void check_time_vector_update(unsigned int uid,int slot ,long int latency,int ty void node_req_hist_clear(void *p); void node_req_hist_dump(void *p); void node_req_hist_update(void * p,int node, long long cycle); +static void gpgpu_debug(); /* functionally simulated memory */ extern struct mem_t *mem; @@ -1549,6 +1552,8 @@ void gpu_sim_loop( int grid_num ) sc[i]->gpu_cycle++; } gpu_sim_cycle++; + if( g_interactive_debugger_enabled ) + gpgpu_debug(); for (unsigned i=0;i<gpu_n_shader && more_thread;i++) { if (gpgpu_spread_blocks_across_cores) { @@ -1759,3 +1764,112 @@ void dump_pipeline() { dump_pipeline_impl(0,-1,-1); } + +/// interactive debugger + +static void gpgpu_debug() +{ + bool done=true; + + static bool single_step=true; + static unsigned next_brkpt=1; + static std::map<unsigned,brk_pt> breakpoints; + + /// if single stepping, go to interactive debugger + + if( single_step ) + done=false; + + /// check if we've reached a breakpoint + + for( std::map<unsigned,brk_pt>::iterator i=breakpoints.begin(); i!=breakpoints.end(); i++) { + unsigned num=i->first; + brk_pt &b=i->second; + if( b.is_watchpoint() ) { + unsigned addr = b.get_addr(); + unsigned new_value = read_location(addr); + if( new_value != b.get_value() ) { + printf( "GPGPU-Sim DBG: watch point %u triggered (old value=%x, new value=%x)\n", + num,b.get_value(),new_value ); + b.set_value(new_value); + done = false; + } + } else { + for( unsigned sid=0; sid < gpu_n_shader; sid++ ) { + inst_t *fvi = first_valid_thread(sc[sid]->pipeline_reg[IF_ID]); + if( !fvi ) continue; + if( thread_at_brkpt(fvi->ptx_thd_info, b) ) { + done = false; + printf("GPGPU-Sim DBG: reached breakpoint %u at %s (sm=%u, hwtid=%u)\n", + num, b.location().c_str(), sid, fvi->hw_thread_id ); + } + } + } + } + + /// enter interactive debugger loop + + while (!done) { + printf("(gpgpu-sim dbg) "); + fflush(stdout); + + char line[1024]; + fgets(line,1024,stdin); + + char *tok = strtok(line," \t\n"); + if( !strcmp(tok,"dp") ) { + int shader_num = 0; + tok = strtok(NULL," \t\n"); + sscanf(tok,"%d",&shader_num); + dump_pipeline_impl((0x40|0x4|0x1),shader_num,0); + printf("\n"); + fflush(stdout); + } else if( !strcmp(tok,"q") || !strcmp(tok,"quit") ) { + printf("\nreally quit GPGPU-Sim (y/n)?\n"); + fgets(line,1024,stdin); + tok = strtok(NULL," \t\n"); + if( !strcmp(tok,"y") ) { + exit(0); + } else { + printf("not quiting.\n"); + } + } else if( !strcmp(tok,"b") ) { + tok = strtok(NULL," \t\n"); + char brkpt[1024]; + sscanf(tok,"%s",brkpt); + tok = strtok(NULL," \t\n"); + unsigned uid; + sscanf(tok,"%u",&uid); + breakpoints[next_brkpt++] = brk_pt(brkpt,uid); + } else if( !strcmp(tok,"d") ) { + tok = strtok(NULL," \t\n"); + unsigned uid; + sscanf(tok,"%u",&uid); + breakpoints.erase(uid); + } else if( !strcmp(tok,"s") ) { + done = true; + } else if( !strcmp(tok,"c") ) { + single_step=false; + done = true; + } else if( !strcmp(tok,"w") ) { + tok = strtok(NULL," \t\n"); + unsigned addr; + sscanf(tok,"%x",&addr); + unsigned value = read_location(addr); + breakpoints[next_brkpt++] = brk_pt(addr,value); + } else if( !strcmp(tok,"h") ) { + printf("commands:\n"); + printf(" q - quit GPGPU-Sim\n"); + printf(" b <file>:<line> <thead uid> - set breakpoint\n"); + printf(" w <global address> - set watchpoint\n"); + printf(" del <n> - delete breakpoint\n"); + printf(" s - single step one shader cycle (all cores)\n"); + printf(" c - continue simulation without single stepping\n"); + printf(" dp <n> - display pipeline contents on SM <n>\n"); + printf(" h - print this message\n"); + } else { + printf("\ncommand not understood.\n"); + } + fflush(stdout); + } +} |