From 901525b1079ac02da0122a76d8e4c3546a7f80f6 Mon Sep 17 00:00:00 2001
From: Samuel Williams <samuel.williams@oriontransfer.co.nz>
Date: Thu, 19 May 2022 23:03:49 +1200
Subject: Add support for address sanitizer for amd64 and arm64.

---
 coroutine/amd64/Context.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'coroutine/amd64')

diff --git a/coroutine/amd64/Context.h b/coroutine/amd64/Context.h
index f626a47225..44daa4e01a 100644
--- a/coroutine/amd64/Context.h
+++ b/coroutine/amd64/Context.h
@@ -19,10 +19,29 @@
 
 enum {COROUTINE_REGISTERS = 6};
 
+#if defined(__SANITIZE_ADDRESS__)
+    #define COROUTINE_SANITIZE_ADDRESS
+#elif defined(__has_feature)
+    #if __has_feature(address_sanitizer)
+        #define COROUTINE_SANITIZE_ADDRESS
+    #endif
+#endif
+
+#if defined(COROUTINE_SANITIZE_ADDRESS)
+#include <sanitizer/common_interface_defs.h>
+#include <sanitizer/asan_interface.h>
+#endif
+
 struct coroutine_context
 {
     void **stack_pointer;
     void *argument;
+
+#if defined(COROUTINE_SANITIZE_ADDRESS)
+    void *fake_stack;
+    void *stack_base;
+    size_t stack_size;
+#endif
 };
 
 typedef COROUTINE(* coroutine_start)(struct coroutine_context *from, struct coroutine_context *self);
@@ -39,6 +58,12 @@ static inline void coroutine_initialize(
 ) {
     assert(start && stack && size >= 1024);
 
+#if defined(COROUTINE_SANITIZE_ADDRESS)
+    context->fake_stack = NULL;
+    context->stack_base = stack;
+    context->stack_size = size;
+#endif
+
     // Stack grows down. Force 16-byte alignment.
     char * top = (char*)stack + size;
     context->stack_pointer = (void**)((uintptr_t)top & ~0xF);
-- 
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