test: add unreachable.wasm, only passes on extism a91846a or later

.gitignore

@@ -1,4 +1,5 @@
 Extism/host.wasm
+Extism/unreachable.wasm
 Extism/MYMETA.json
 Extism/MYMETA.yml
 Extism/Makefile
@@ -17,3 +18,9 @@ examples/Extism-AudioDecoder/*.wav
 examples/Extism-AudioDecoder/*.pcm
 examples/Extism-AudioDecoder/.vscode
 examples/CountVowels/.vscode
+Alien-libextism/MYMETA.json
+Alien-libextism/MYMETA.yml
+Alien-libextism/Makefile
+Alien-libextism/_alien/
+Alien-libextism/blib/
+Alien-libextism/pm_to_blib

Extism/t/02-extism.t

@@ -7,7 +7,7 @@ use Extism ':all';
 use JSON::PP qw(encode_json decode_json);
 use File::Temp qw(tempfile);
 use Devel::Peek qw(Dump);
-plan tests => 40;
+plan tests => 44;
 
 # ...
 ok(Extism::version());
@@ -180,3 +180,18 @@ ok($decoded[1]{total} == 6);
 # Verify both sets of results are the same
 is($highlevel[0], $lowlevel[0]);
 is($highlevel[1], $lowlevel[1]);
+
+# test unreachable plugin
+my $unreachable = encode_json({
+    wasm => [
+        {
+            path => 'unreachable.wasm',
+        }
+    ],
+});
+my $uplugin = Extism::Plugin->new($unreachable, {wasi => 1});
+ok($uplugin);
+my ($ures, $urc, $uinfo) = $uplugin->call('do_unreachable');
+ok(!defined $ures);
+ok($urc != 0);
+ok($uinfo);

Makefile

@@ -1,9 +1,12 @@
 .PHONY: all
-all: Extism Extism/host.wasm
+all: Extism Extism/host.wasm Extism/unreachable.wasm
 
 Extism/host.wasm: host.c
 	$(WASI_SDK_PATH)/bin/clang -o $@ $^ -mexec-model=reactor
 
+Extism/unreachable.wasm: unreachable.cpp
+	$(WASI_SDK_PATH)/bin/clang++ -fno-exceptions -o $@ $^ -mexec-model=reactor
+
 Extism/Makefile: Extism/Makefile.PL
 	cd Extism && perl Makefile.PL
 .PHONY: Extism

unreachable.cpp

@@ -0,0 +1,10 @@
+// #define EXTISM_IMPLEMENTATION
+#include "extism-pdk.h"
+#include <stdexcept>
+#include <stdint.h>
+
+int32_t EXTISM_EXPORTED_FUNCTION(do_unreachable)
+{
+    std::terminate();
+    return -1;
+}