Round trip source map (#2810)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Make output of obfuscation locs work in a slang-module.

* Tidy up detection for writing serialized source locs.

* Support for .zip references.
Handling of obfuscated source maps read from containers.
A test to check obfuscated source map working on a module.

* When using obfuscation, always obfuscate locs instead of stripping them. We keep a source map, so we can still produce reasonable errors.

* Write out source locs if debug information is enabled.

* Check output without sourcemap.

* Small fixes.

* Small improvements around hash calculation for source map name.

* Disable test that fails on x86 gcc linux for now.

* Fix issues around obfuscated source map using lines rather than columns.
Fix some issues around encoding/decoding.

* Make column calculation of source locs take into account utf8/tabs.
Don't special case obfuscated source map for lookup for source loc.

* Support following multiple source maps.

* Small fixes/improvements around SourceMap lookup.

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/serialization/obfuscated-loc-module.slang b/tests/serialization/obfuscated-loc-module.slang
new file mode 100644
index 000000000..63c4f61ee
--- /dev/null
+++ b/tests/serialization/obfuscated-loc-module.slang
@@ -0,0 +1,21 @@
+//TEST_IGNORE_FILE:
+
+// obfuscated-loc-module.slang
+
+
+int billy(int v)
+{
+    return v + 1;
+}
+
+// This function is designed to fail during IR passes/emit. 
+int silly(int a)
+{
+    int t = 0;
+    [ForceUnroll(10)]
+    while ( a > 0)
+    {
+        t = t + t + a;
+    }
+    return t;
+}