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/* -*- Mode: pike; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ 
#pike __REAL_VERSION__ 
#require constant(get_profiling_info) 
 
private multiset(program) object_programs() 
{ 
    multiset x = (<>); 
    int orig_enabled = Pike.gc_parameters()->enabled; 
    Pike.gc_parameters( (["enabled":0]) ); 
    program prog = this_program; 
 
    void add_traverse( program start, function traverse ) 
    { 
        while(1) 
        { 
            x[start] = 1; 
            program next_prog; 
            if(catch(next_prog=traverse(start))) 
                break; 
            start = next_prog; 
        } 
    }; 
 
    add_traverse( _next(prog), _next ); 
    add_traverse( prog, _prev ); 
    Pike.gc_parameters( (["enabled":orig_enabled]) ); 
 
    return x; 
} 
 
private string remove_cwd(string from) 
{ 
    if( !from ) return 0; 
 
    if( has_prefix( from, getcwd() ) ) 
        from = from[strlen(getcwd())..]; 
    return from; 
} 
 
private string normalize_name( string from ) 
{ 
    from = remove_cwd( from ); 
    from = replace( from, ".pmod/", "." ); 
    from = replace( from, ".pmod", "" ); 
    from = replace( from, ".pike", "" ); 
    from = replace( from, ".so", "" ); 
    from = replace( from, "()->", "." ); 
    return from; 
} 
 
private array (program) all_modules() 
{ 
    return (array)object_programs(); 
} 
 
private string filter_obj_name( string x ) 
{ 
    string a, b; 
    while( sscanf( x, "%s(%*s)%s", a, b ) == 3 ) 
        x = a+b; 
    return x; 
} 
 
private mapping(program|object:string) pnc = set_weak_flag(([]),Pike.WEAK_INDICES); 
private string program_name(program|object what) 
{ 
    if( pnc[what] ) return pnc[what]; 
    string p; 
    if( (p = search(master()->programs,what)) && p != "main") 
        return pnc[what] = normalize_name(p); 
    return pnc[what] = filter_obj_name(sprintf("%O",what)-".pike"); 
} 
 
private string program_function_file( program prog, string key ) 
{ 
    return remove_cwd(Program.defined(prog, key)||"-"); 
} 
 
private mapping get_prof(bool avoid_overhead) 
{ 
    mapping res = ([]); 
    foreach(all_modules(), program prog) 
    { 
        if( prog && programp( prog ) ) 
        { 
            string n = pnc[prog] || program_name(prog); 
            int cnt = 1; 
            array pinf = get_profiling_info( prog ); 
            /* clones, ([ info }) */ 
            if( !avoid_overhead ) 
                foreach( pinf[1]; string key; array row ) 
                    pinf[1][key] += ({program_function_file(prog,key)}); 
            while( res[n] ) 
                n=pnc[prog]+"<"+(++cnt)+">"; 
            res[n] = pinf; 
        } 
    } 
    return res; 
} 
 
 
private string trim_obj( string x ) 
{ 
    sscanf( x, "/mod/%s", x ); 
    sscanf( x, "/modules/%s", x ); 
    if( has_prefix( x, "/main." ) ) 
        x = "Backend"+x[5..]; 
 
    int l; 
    if( sscanf( x, "%s__lambda_%*s_line_%d", x, l ) ) 
        x = x+" @ "+l; 
    x = replace( x, "().", "." ); 
    return x; 
}; 
 
private mapping oi = ([]); 
private int last_cpu_used; 
private mapping(string:mapping(string:string)) nc = ([]); 
 
private mapping low_get_prof_info( bool avoid_overhead ) 
{ 
    mapping as_functions = ([]); 
    mapping tmp = get_prof(avoid_overhead); 
 
    foreach(indices(tmp), string c) 
    { 
        // if( has_prefix( c, "/master" ) ) 
        //     continue; 
        if( has_value( c, "Profiling" ) ) 
            continue; 
        mapping g = tmp[c][1]; 
        mapping ce = nc[c] || (nc[c]=([])); 
 
        foreach(indices(g), string f) 
        { 
            string fn = ce[f]; 
            if( !fn ) 
            { 
                fn = c+"."+f; 
                if( has_prefix( f, "__lambda" ) ) 
                    fn = c+".lambda @ "+(f/"_")[-1]; 
                switch( f ) 
                { 
                    case "cast":   fn = "(cast)"+c; break; 
                    case "__INIT": fn = c;          break; 
                    case "create": case "`()": fn = c+"()"; break; 
                    case "`->":    fn = c+"->"; break; 
                    case "`[]":    fn = c+"[]"; break; 
                } 
                fn = replace( fn, "()->", "."); 
                fn = replace( fn, "->", "."); 
                fn = replace( fn, "_static_modules.", "" ); 
                fn = replace( fn, ".Builtin", "" ); 
                fn = trim_obj( fn ); 
                fn = replace( fn, "\0", ""); 
                ce[f] = fn; 
            } 
            if( !has_suffix(fn,"Program.defined" ) ) 
                as_functions[fn] = ({ g[f][2],g[f][0],g[f][1],g[f][-1] }); 
        } 
    } 
    return as_functions; 
} 
 
 
private void hide_compile_time() 
{ 
    get_prof_info(); 
} 
private mixed __when_pike_backend_started = call_out( hide_compile_time, 0.0 ); 
 
//! Collect profiling data. 
//! 
//! This will return the CPU usage, by function, since the last time 
//! the function was called. 
//! 
//! The returned array contains the following entries per entry: 
//! @array 
//! @elem string name 
//!   The name of the function 
//! @elem float number_of_calls 
//!   The number of calls 
//! @elem float self_time 
//!   The self CPU time 
//! @elem float cpu_time 
//!   The self CPU time, including children. 
//! @elem float self_time_pct 
//!   The self CPU time as percentage of total time. 
//! @elem float cpu_time_pct 
//!   The self CPU time, including children, as percentage of total 
//!   time. 
//! @elem string function_line 
//!   This is the location in the source of the start of the function 
//! @endarray 
array(array(string|float|int)) get_prof_info(string|array(string)|void include, 
                                             string|array(string)|void exclude) 
{ 
    array res = ({}); 
    int time_passed = gethrvtime()-last_cpu_used; 
    mapping as_functions = low_get_prof_info( false ); 
    foreach( as_functions; string key; array v ) 
    { 
        if( oi[key] ) 
        { 
            v[0] -= oi[key][0]; 
            v[1] -= oi[key][1]; 
            v[2] -= oi[key][2]; 
        } 
        if( v[1] && (v[0]||v[2]) ) 
        { 
            res += 
                ({ 
                    ({key, 
                      v[1], 
                      (float)v[0], 
                      (float)v[2], 
                      (float)(v[0])/v[1] * 1000, 
                      (float)(v[2])/v[1] * 1000, 
                      (int)((v[0]*100) / (time_passed/1000.0)), 
                      (int)((v[2]*100) / (time_passed/1000.0)), 
                      v[-1], 
                    }) 
                }); 
        } 
    } 
    if( include && sizeof(include) ) 
        res = filter( res, lambda( array q ) { return glob(include,q[0]); }); 
 
    if( exclude && sizeof(exclude) ) 
        res = filter( res, lambda( array q ) { return !glob(exclude,q[0]); }); 
 
    /* In order to avoid counting the act of profiling, get information again: */ 
    oi = low_get_prof_info( true ); 
    last_cpu_used = gethrvtime(); 
    return res; 
} 
 
int name_column_width = 32; 
 
private string format_number(string|int|float x ) 
{ 
    if( stringp( x ) ) 
    { 
        if( x[0..6] == "/master" ) 
            x = x[1..]; 
        x = replace((x-" "),"@",":"); 
        if( strlen( x ) > name_column_width ) 
            x = x[..5] + "[..]" + x[<(name_column_width-11)..]; 
        return x; 
    } 
    if( intp( x ) ) 
    { 
        if( x > 100000 ) 
            return x/1000+"k"; 
        return (string)x; 
    } 
 
    constant units = ({ "k", "M", "G", "T", "" }); 
    int unit = -1; 
    while( x >= 1000.0 ) 
    { 
        x/= 1000.0; 
        unit++; 
    } 
 
    if( (float)(int)x == x && (int)x == 0 ) 
        return "-"; 
 
    return sprintf("%.1f%s",x,units[unit] ); 
} 
 
 
private void output_result( array rows, int percentage_column ) 
{ 
    string line = "-"*(79-32+name_column_width)+"\n"; 
    werror(line); 
    werror("%-"+name_column_width+"s %7s %7s %7s %5s %7s %7s\n", 
           "Function", "Calls", "Time","+Child","%", "/call", "ch/call" ); 
    werror("%-"+name_column_width+"s %7s %7s %7s %5s %7s %7s\n", 
           "", "", "ms", "ms", "", "us", "us" ); 
    werror(line); 
    foreach( rows, array r ) 
        werror( "%[0]-"+name_column_width+"s %[1]7s %[2]7s %[3]7s" 
                " %["+percentage_column+"]5s %[4]7s %[5]7s\n", 
                @format_number(r[*]) ); 
    werror(line); 
} 
 
 
//! Show profiling information in a more-or-less readable manner. 
//! This only works if pike has been compiled with profiling support. 
//! 
//! The function will print to stderr using werror. 
//! 
//! This is mainly here for use from the @[Debug.Watchdog] class, if 
//! you want to do your own formatting or output to some other channel 
//! use @[get_prof_info] instead. 
void display(int|void num, 
             string|array(string)|void pattern, 
             string|array(string)|void exclude) 
{ 
    // Show top num. 
    if( !exclude ) 
    { 
        // Do not count ourselves by default. 
        exclude = ({"Debug.*", 
                    "/master.describe_program", 
                    "/master.describe_module", 
                    "/master.describe_function", 
                    "/master.describe_backtrace", 
                    "/master.program_path_to_name", 
                    "/master.describe_object" 
                  }); 
    } 
    array rows = get_prof_info( pattern,exclude ); 
    sort( (array(float))column(rows,1+(__MINOR__==6?0:2)), rows ); 
    if( pattern ) 
        rows = filter( rows, lambda(array row) { 
                                 return glob(pattern, row[0]); 
                             }); 
    werror("Most CPU-consuming functions " 
           "sorted by total (self + child) times.\n"); 
    output_result( reverse(rows)[..num||99], 7 ); 
 
    werror("\n" 
           "Most CPU-consuming functions sorted by self-time.\n"); 
    sort( (array(float))column(rows,1+(__MINOR__==6?0:1)), rows ); 
    output_result( reverse(rows)[..num||99], 6 ); 
}