From 77fa3988c7e272425c72bcc04c8a10e02b3a12ec Mon Sep 17 00:00:00 2001
From: Ingvar Stepanyan <rreverser@google.com>
Date: Fri, 6 Sep 2019 18:16:59 +0200
Subject: Print custom section contents if printable (#2326)

This helps with debugging human-readable sections like sourceMappingURL.
---
 src/passes/Print.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src')

diff --git a/src/passes/Print.cpp b/src/passes/Print.cpp
index ad4d20bae..20c585859 100644
--- a/src/passes/Print.cpp
+++ b/src/passes/Print.cpp
@@ -2122,6 +2122,25 @@ struct PrintSExpression : public OverriddenVisitor<PrintSExpression> {
       doIndent(o, indent);
       o << ";; custom section \"" << section.name << "\", size "
         << section.data.size();
+      bool isPrintable = true;
+      for (auto c : section.data) {
+        if (!isprint(c)) {
+          isPrintable = false;
+          break;
+        }
+      }
+      if (isPrintable) {
+        o << ", contents: ";
+        // std::quoted is not available in all the supported compilers yet.
+        o << '"';
+        for (auto c : section.data) {
+          if (c == '\\' || c == '"') {
+            o << '\\';
+          }
+          o << c;
+        }
+        o << '"';
+      }
       o << maybeNewLine;
     }
     decIndent();
-- 
cgit v1.2.3