272 lines
8.1 KiB
Text
272 lines
8.1 KiB
Text
# debug.nas -- debugging helpers
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#------------------------------------------------------------------------------
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#
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# debug.color(<enabled>); ... turns terminal colors on (1) or off (0)
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#
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# debug.dump(<variable>) ... dumps contents of variable to terminal;
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# abbreviation for print(debug.string(v))
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#
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# debug.local([<frame:int>]) ... dump local variables of current
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# or given frame
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#
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# debug.backtrace([<comment:string>]} ... writes backtrace with local variables
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# (similar to gdb's "bt full)
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#
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# debug.tree([<property> [, <mode>]) ... dump property tree under property path
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# or props.Node hash (default: root). If
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# <mode> is unset or 0, use flat mode
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# (similar to props.dump()), otherwise
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# use space indentation
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#
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# debug.exit() ... exits fgfs
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#
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# debug.bt ... abbreviation for debug.backtrace
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#
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# debug.string(<variable>) ... returns contents of variable as string
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#
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# debug.load_nasal(<file> [, <module>])) ... load and run Nasal file (under namespace
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# <module> if defined, or the basename
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# otherwise)
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#
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# debug.benchmark(<label:string>, <func> [<args>])
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# ... calls function with optional args and
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# prints execution time in seconds,
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# prefixed with <label>.
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#
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# debug.printerror(<err-vector>) ... prints error vector as set by call()
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#
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#
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# CAVE: this file makes extensive use of ANSI color codes. These are
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# interpreted by UNIX shells and MS Windows with ANSI.SYS extension
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# installed. If the color codes aren't interpreted correctly, then
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# set property /sim/startup/terminal-ansi-colors=0
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var _c = func {}
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var color = func(enabled) {
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if (enabled) {
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_c = func(color, s) { "\x1b[" ~ color ~ "m" ~ s ~ "\x1b[m" }
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} else {
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_c = func(dummy, s) { s }
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}
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}
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# for color codes see $ man console_codes
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#
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var _title = func(s) { _c("33;42;1", s) } # backtrace header
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var _section = func(s) { _c("37;41;1", s) } # backtrace frame
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var _error = func(s) { _c("31;1", s) } # internal errors
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var _bench = func(s) { _c("37;45;1", s) } # benchmark info
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var _nil = func(s) { _c("32", s) } # nil
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var _string = func(s) { _c("31", s) } # "foo"
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var _num = func(s) { _c("31", s) } # 0.0
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var _bracket = func(s) { _c("", s) } # [ ]
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var _brace = func(s) { _c("", s) } # { }
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var _angle = func(s) { _c("", s) } # < >
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var _vartype = func(s) { _c("33", s) } # func ghost
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var _proptype = func(s) { _c("34", s) } # BOOL INT LONG DOUBLE ...
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var _path = func(s) { _c("36", s) } # /some/property/path
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var _internal = func(s) { _c("35", s) } # me parents
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var _varname = func(s) { _c("1", s) } # variable_name
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var tree = func(p = "", graph = 1) {
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var n = isa(p, props.Node) ? p : props.globals.getNode(p, 0);
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if (n == nil)
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dump(n);
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else
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_tree(n, graph);
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}
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var _tree = func(n, graph = 1, prefix = "", level = 0) {
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var path = n.getPath();
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var children = n.getChildren();
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var s = "";
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if (graph) {
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s = prefix ~ n.getName();
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var index = n.getIndex();
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if (index)
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s ~= "[" ~ index ~ "]";
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} else {
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s = n.getPath();
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}
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if (size(children)) {
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s ~= "/";
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if (n.getType() != "NONE")
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s ~= " = " ~ string(n.getValue()) ~ " " ~ _attrib(n)
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~ " " ~ _section(" PARENT-VALUE ");
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} else {
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s ~= " = " ~ string(n.getValue()) ~ " " ~ _attrib(n);
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}
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print(s);
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if (n.getType() != "ALIAS")
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forindex (var i; children)
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_tree(children[i], graph, prefix ~ ". ", level + 1);
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}
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var _attrib = func(p) {
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var r = p.getAttribute("read") ? "" : "r";
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var w = p.getAttribute("write") ? "" : "w";
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var R = p.getAttribute("trace-read") ? "R" : "";
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var W = p.getAttribute("trace-write") ? "W" : "";
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var A = p.getAttribute("archive") ? "A" : "";
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var U = p.getAttribute("userarchive") ? "U" : "";
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var T = p.getAttribute("tied") ? "T" : "";
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var attr = r ~ w ~ R ~ W ~ A ~ U ~ T;
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var type = "(" ~ _proptype(p.getType());
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if (size(attr))
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type ~= ", " ~ attr;
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if (var l = p.getAttribute("listeners"))
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type ~= ", L" ~ l;
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return type ~ ")";
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}
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var _dump_prop = func(p) {
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_path(p.getPath()) ~ " = " ~ string(p.getValue()) ~ " " ~ _attrib(p);
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}
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var _dump_var = func(v) {
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if (v == "me" or v == "parents")
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return _internal(v);
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else
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return _varname(v);
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}
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var string = func(o) {
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var t = typeof(o);
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if (t == "nil") {
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return _nil("nil");
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} elsif (t == "scalar") {
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return num(o) == nil ? _string('"' ~ o ~ '"') : _num(o);
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} elsif (t == "vector") {
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var s = "";
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forindex (var i; o)
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s ~= (i == 0 ? "" : ", ") ~ string(o[i]);
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return _bracket("[") ~ " " ~ s ~ " " ~ _bracket("]");
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} elsif (t == "hash") {
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if (contains(o, "parents") and typeof(o.parents) == "vector"
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and size(o.parents) == 1 and o.parents[0] == props.Node)
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return _angle("<") ~ _dump_prop(o) ~ _angle(">");
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var k = keys(o);
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var s = "";
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forindex (var i; k)
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s ~= (i == 0 ? "" : ", ") ~ _dump_var(k[i]) ~ " : " ~ string(o[k[i]]);
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return _brace("{") ~ " " ~ s ~ " " ~ _brace("}");
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} elsif (t == "ghost") {
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return _angle("<") ~ _nil(ghosttype(o)) ~ _angle(">");
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} else {
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return _angle("<") ~ _vartype(t) ~ _angle(">");
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}
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}
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var dump = func { size(arg) ? print(string(arg[0])) : local(1) }
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var local = func(frame = 0) {
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var v = caller(frame + 1);
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print(v == nil ? _error("<no such frame>") : string(v[0]));
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return v;
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}
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var backtrace = func(desc = nil) {
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var d = desc == nil ? "" : " '" ~ desc ~ "'";
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print("\n" ~ _title("\n### backtrace" ~ d ~ " ###"));
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for (var i = 1; 1; i += 1) {
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v = caller(i);
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if (v == nil)
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return;
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print(_section(sprintf("#%-2d called from %s, line %s:", i - 1, v[2], v[3])));
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dump(v[0]);
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}
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}
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var bt = backtrace;
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##
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# Executes function f with optional arguments and prints execution
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# time in seconds. Examples:
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#
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# var test = func(n) { for (var i = 0; i < n; i +=1) { print(i) }
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# debug.benchmark("test()/1", test, 10);
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# debug.benchmark("test()/2", func { test(10) });
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#
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var benchmark = func(label, f, arg...) {
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var start = systime();
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call(f, arg);
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print(_bench(sprintf(" %s --> %.6f s ", label, systime() - start)));
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}
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var exit = func { fgcommand("exit") }
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# print error vector as set by call(). By using call() one can execute
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# code that catches "exceptions" (by a die() call or errors). The Nasal
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# code doesn't abort in this case. Example:
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#
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# call(func { possibly_buggy() }, nil, var err = []);
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# debug.printerror(err);
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#
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var printerror = func(err) {
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if (!size(err))
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return;
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print(sprintf("%s at %s line %d", err[0], err[1], err[2]));
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for (var i = 3; i < size(err); i += 2)
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print(sprintf(" called from %s line %d", err[i], err[i + 1]));
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}
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if (getprop("/sim/logging/priority") != "alert") {
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_setlistener("/sim/signals/nasal-dir-initialized", func { print(_c("32", "** NASAL initialized **")) });
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_setlistener("/sim/signals/fdm-initialized", func { print(_c("36", "** FDM initialized **")) });
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}
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##
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# Loads Nasal file into namespace and executes it. The namespace
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# (module name) is taken from the optional second argument, or
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# derived from the Nasal file's name.
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#
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# Usage: debug.load_nasal(<filename> [, <modulename>]);
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#
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# Example:
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#
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# debug.load_nasal(getprop("/sim/fg-root") ~ "/Local/test.nas");
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# debug.load_nasal("/tmp/foo.nas", "test");
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#
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var load_nasal = func(file, module = nil) {
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if (module == nil)
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module = split(".", split("/", file)[-1])[0];
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if (!contains(globals, module))
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globals[module] = {};
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printlog("info", "loading ", file, " into namespace ", module);
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call(compile(io.readfile(file), file), nil, nil, globals[module]);
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}
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_setlistener("/sim/signals/nasal-dir-initialized", func {
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setlistener("/sim/startup/terminal-ansi-colors", func {
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color(cmdarg().getBoolValue());
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}, 1);
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});
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