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-rw-r--r--tools/linedebug.lua18
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/linedebug.lua b/tools/linedebug.lua
new file mode 100644
index 00000000..96214cc8
--- /dev/null
+++ b/tools/linedebug.lua
@@ -0,0 +1,18 @@
+local data = {}
+local getinfo = debug.getinfo;
+local function linehook(ev, li)
+ local S = getinfo(2, "S");
+ if S and S.source and S.source:match"^@" then
+ local file = S.source:sub(2);
+ local lines = data[file];
+ if not lines then
+ lines = {};
+ data[file] = lines;
+ for line in io.lines(file) do
+ lines[#lines+1] = line;
+ end
+ end
+ io.stderr:write(ev, " ", file, " ", li, " ", lines[li], "\n");
+ end
+end
+debug.sethook(linehook, "l");