Sourcemap support for Binaryen C/JS (#1392)

* Initial source map support for C/JS

* Also test getDebugInfoFileName

2 files changed, 47 insertions, 0 deletions

diff --git a/test/binaryen.js/sourcemap.js b/test/binaryen.js/sourcemap.js
new file mode 100644
index 000000000..b184f73ab
--- /dev/null
+++ b/test/binaryen.js/sourcemap.js
@@ -0,0 +1,39 @@
+var module = new Binaryen.Module();
+
+var signature = module.addFunctionType("i", Binaryen.i32, []);
+
+var fileIndex = module.addDebugInfoFileName("module.c");
+
+console.log(module.getDebugInfoFileName(fileIndex));
+console.log();
+
+var expr = module.i32.const(1);
+var body = module.block("", [
+  expr
+], Binaryen.i32);
+
+var func = module.addFunction("main", signature, [], body);
+
+module.setDebugLocation(func, expr, fileIndex, 1, 2);
+module.setDebugLocation(func, body, fileIndex, 0, 3);
+
+var output = module.emitBinaryWithSourceMap("module.wasm.map");
+
+function dumpBinary(buffer) {
+  var hex = [], o, b, h;
+  for (var i = 0; i < buffer.length; ++i) {
+    o = i.toString(16);
+    while (o.length < 3) o = "0" + o;
+    if ((i & 15) === 0) hex.push((i ? "\n" : "") + o + ":");
+    if ((b = buffer[i]) >= 0x21 && b <= 0x7e)
+      h = String.fromCharCode(b) + ' ';
+    else if ((h = b.toString(16)).length < 2)
+      h = "0" + h;
+    hex.push(h);
+  }
+  console.log(hex.join(" "));
+}
+
+dumpBinary(output.binary);
+console.log();
+console.log(output.sourceMap);
diff --git a/test/binaryen.js/sourcemap.js.txt b/test/binaryen.js/sourcemap.js.txt
new file mode 100644
index 000000000..0065a09db
--- /dev/null
+++ b/test/binaryen.js/sourcemap.js.txt
@@ -0,0 +1,8 @@
+module.c
+
+000: 00 a  s  m  01 00 00 00 01 05 01 `  00 01 7f 03 
+010: 02 01 00 0a 06 01 04 00 A  01 0b 00 !  10 s  o  
+020: u  r  c  e  M  a  p  p  i  n  g  U  R  L  0f m  
+030: o  d  u  l  e  .  w  a  s  m  .  m  a  p 
+
+{"version":3,"sources":["module.c"],"names":[],"mappings":"gCAAE"}