From e41f22b992dc0bbeb8a2f262e6d677644166d9f0 Mon Sep 17 00:00:00 2001
From: Yousaf Nabi <you@saf.dev>
Date: Wed, 3 Jul 2024 00:08:10 +0100
Subject: [PATCH] fix: plugin verification panics due to missing SA_ONSTACK
 signal

---
 internal/native/message_server.go |  3 +-
 internal/native/mock_server.go    |  1 +
 internal/native/signal.go         | 87 +++++++++++++++++++++++++++++++
 internal/native/verifier.go       |  2 +-
 4 files changed, 91 insertions(+), 2 deletions(-)
 create mode 100644 internal/native/signal.go

diff --git a/internal/native/message_server.go b/internal/native/message_server.go
index 723ff6952..8102e7370 100644
--- a/internal/native/message_server.go
+++ b/internal/native/message_server.go
@@ -329,7 +329,8 @@ func (m *MessageServer) UsingPlugin(pluginName string, pluginVersion string) err
 	defer free(cPluginName)
 	cPluginVersion := C.CString(pluginVersion)
 	defer free(cPluginVersion)
-
+	
+	InstallSignalHandlers()
 	r := C.pactffi_using_plugin(m.messagePact.handle, cPluginName, cPluginVersion)
 
 	// 1 - A general panic was caught.
diff --git a/internal/native/mock_server.go b/internal/native/mock_server.go
index 17b148e9c..d3adcfc85 100644
--- a/internal/native/mock_server.go
+++ b/internal/native/mock_server.go
@@ -555,6 +555,7 @@ func (m *MockServer) UsingPlugin(pluginName string, pluginVersion string) error
 	cPluginVersion := C.CString(pluginVersion)
 	defer free(cPluginVersion)
 
+	InstallSignalHandlers()
 	r := C.pactffi_using_plugin(m.pact.handle, cPluginName, cPluginVersion)
 
 	// 1 - A general panic was caught.
diff --git a/internal/native/signal.go b/internal/native/signal.go
new file mode 100644
index 000000000..8757e47d7
--- /dev/null
+++ b/internal/native/signal.go
@@ -0,0 +1,87 @@
+//go:build cgo
+// +build cgo
+
+package native
+
+/*
+#if defined(__APPLE__) || defined(__linux__)
+// https://github.com/wailsapp/wails/pull/2152/files#diff-d4a0fa73df7b0ab971e550f95249e358b634836e925ace96f7400480916ac09e
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+
+static void fix_signal(int signum)
+{
+    struct sigaction st;
+
+    if (sigaction(signum, NULL, &st) < 0) {
+        goto fix_signal_error;
+    }
+    st.sa_flags |= SA_ONSTACK;
+    if (sigaction(signum, &st,  NULL) < 0) {
+        goto fix_signal_error;
+    }
+    return;
+fix_signal_error:
+        fprintf(stderr, "error fixing handler for signal %d, please "
+                "report this issue to "
+                "https://github.com/pact-foundation/pact-go: %s\n",
+                signum, strerror(errno));
+}
+
+static void install_signal_handlers()
+{
+#if defined(SIGCHLD)
+    fix_signal(SIGCHLD);
+#endif
+#if defined(SIGHUP)
+    fix_signal(SIGHUP);
+#endif
+#if defined(SIGINT)
+    fix_signal(SIGINT);
+#endif
+#if defined(SIGQUIT)
+    fix_signal(SIGQUIT);
+#endif
+#if defined(SIGABRT)
+    fix_signal(SIGABRT);
+#endif
+#if defined(SIGFPE)
+    fix_signal(SIGFPE);
+#endif
+#if defined(SIGTERM)
+    fix_signal(SIGTERM);
+#endif
+#if defined(SIGBUS)
+    fix_signal(SIGBUS);
+#endif
+#if defined(SIGSEGV)
+    fix_signal(SIGSEGV);
+#endif
+#if defined(SIGXCPU)
+    fix_signal(SIGXCPU);
+#endif
+#if defined(SIGXFSZ)
+    fix_signal(SIGXFSZ);
+#endif
+}
+#else
+	static void install_signal_handlers()
+	{
+	}
+#endif
+*/
+import "C"
+import (
+	"os"
+	"runtime"
+)
+
+func InstallSignalHandlers() {
+	if os.Getenv("PACT_GO_INSTALL_SIGNAL_HANDLERS") != "0" {
+		if runtime.GOOS != "windows" {
+			C.install_signal_handlers()
+		}
+	}
+}
diff --git a/internal/native/verifier.go b/internal/native/verifier.go
index ae781840a..8fc948c4b 100644
--- a/internal/native/verifier.go
+++ b/internal/native/verifier.go
@@ -226,7 +226,7 @@ func (v *Verifier) SetPublishOptions(providerVersion string, buildUrl string, pr
 
 func (v *Verifier) Execute() error {
 	// TODO: Validate
-
+	InstallSignalHandlers()
 	result := C.pactffi_verifier_execute(v.handle)
 
 	/// | Error | Description |