Add flag to ignore errors in custom sections (#833)

If a wasm engine fails to parse a custom section, it must not be an
error. In wabt we often won't want to continue if a custom section can't
be parsed, but it still may be useful to be able to continue.

This change adds a new flag `--ignore-custom-section-errors` to
`wasm2wat` and `wasm-validate`, which will partially parse a custom
section with errors. This could lead to some strange behavior (partially
completed data structures), but generally should be safe to do.

See issue #378 and the discussion on pull #830 for more info.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/binary-reader-objdump.cc b/src/binary-reader-objdump.cc
index 6e3982e9..083ee29d 100644
--- a/src/binary-reader-objdump.cc
+++ b/src/binary-reader-objdump.cc
@@ -1425,8 +1425,9 @@ Result ReadBinaryObjdump(const uint8_t* data,
   features.EnableAll();
   const bool kReadDebugNames = true;
   const bool kStopOnFirstError = false;
+  const bool kFailOnCustomSectionError = false;
   ReadBinaryOptions read_options(features, options->log_stream, kReadDebugNames,
-                                 kStopOnFirstError);
+                                 kStopOnFirstError, kFailOnCustomSectionError);
 
   switch (options->mode) {
     case ObjdumpMode::Prepass: {