Exception logging (win32): Handle error codes correctly, add some more strings.

lib/clif-backend/src/signal/unix.rs

@@ -107,7 +107,7 @@ pub fn call_protected<T>(
                         Ok(SIGSEGV) => "segmentation violation",
                         Ok(SIGBUS) => "bus error",
                         Err(_) => "error while getting the Signal",
-                        _ => "unkown trapped signal",
+                        _ => "unknown trapped signal",
                     };
                     // When the trap-handler is fully implemented, this will return more information.
                     let s = format!("unknown trap at {:p} - {}", faulting_addr, signal);

lib/clif-backend/src/signal/windows.rs

@@ -4,7 +4,6 @@ use crate::trampoline::Trampoline;
 use std::cell::Cell;
 use std::ffi::c_void;
 use std::ptr::{self, NonNull};
-use wasmer_runtime_core::error::{RuntimeError, RuntimeResult};
 use wasmer_runtime_core::typed_func::WasmTrapInfo;
 use wasmer_runtime_core::vm::Ctx;
 use wasmer_runtime_core::vm::Func;
@@ -12,10 +11,14 @@ use wasmer_win_exception_handler::CallProtectedData;
 pub use wasmer_win_exception_handler::_call_protected;
 use winapi::shared::minwindef::DWORD;
 use winapi::um::minwinbase::{
-    EXCEPTION_ACCESS_VIOLATION, EXCEPTION_FLT_DENORMAL_OPERAND, EXCEPTION_FLT_DIVIDE_BY_ZERO,
+    EXCEPTION_ACCESS_VIOLATION, EXCEPTION_ARRAY_BOUNDS_EXCEEDED, EXCEPTION_BREAKPOINT,
+    EXCEPTION_DATATYPE_MISALIGNMENT, EXCEPTION_FLT_DENORMAL_OPERAND, EXCEPTION_FLT_DIVIDE_BY_ZERO,
     EXCEPTION_FLT_INEXACT_RESULT, EXCEPTION_FLT_INVALID_OPERATION, EXCEPTION_FLT_OVERFLOW,
-    EXCEPTION_FLT_STACK_CHECK, EXCEPTION_FLT_UNDERFLOW, EXCEPTION_ILLEGAL_INSTRUCTION,
+    EXCEPTION_FLT_STACK_CHECK, EXCEPTION_FLT_UNDERFLOW, EXCEPTION_GUARD_PAGE,
-    EXCEPTION_INT_DIVIDE_BY_ZERO, EXCEPTION_INT_OVERFLOW, EXCEPTION_STACK_OVERFLOW,
+    EXCEPTION_ILLEGAL_INSTRUCTION, EXCEPTION_INT_DIVIDE_BY_ZERO, EXCEPTION_INT_OVERFLOW,
+    EXCEPTION_INVALID_HANDLE, EXCEPTION_IN_PAGE_ERROR, EXCEPTION_NONCONTINUABLE_EXCEPTION,
+    EXCEPTION_POSSIBLE_DEADLOCK, EXCEPTION_PRIV_INSTRUCTION, EXCEPTION_SINGLE_STEP,
+    EXCEPTION_STACK_OVERFLOW,
 };
 
 thread_local! {
@@ -43,7 +46,7 @@ pub fn call_protected(
     }
 
     let CallProtectedData {
-        code: signum,
+        code,
         exception_address,
         instruction_pointer,
     } = result.unwrap_err();
@@ -53,7 +56,7 @@ pub fn call_protected(
         srcloc: _,
     }) = handler_data.lookup(instruction_pointer as _)
     {
-        Err(CallProtError::Trap(match signum as DWORD {
+        Err(CallProtError::Trap(match code as DWORD {
             EXCEPTION_ACCESS_VIOLATION => WasmTrapInfo::MemoryOutOfBounds,
             EXCEPTION_ILLEGAL_INSTRUCTION => match trapcode {
                 TrapCode::BadSignature => WasmTrapInfo::IncorrectCallIndirectSignature,
@@ -70,7 +73,7 @@ pub fn call_protected(
             _ => WasmTrapInfo::Unknown,
         }))
     } else {
-        let signal = match signum as DWORD {
+        let signal = match code as DWORD {
             EXCEPTION_FLT_DENORMAL_OPERAND
             | EXCEPTION_FLT_DIVIDE_BY_ZERO
             | EXCEPTION_FLT_INEXACT_RESULT
@@ -80,10 +83,26 @@ pub fn call_protected(
             | EXCEPTION_FLT_UNDERFLOW => "floating-point exception",
             EXCEPTION_ILLEGAL_INSTRUCTION => "illegal instruction",
             EXCEPTION_ACCESS_VIOLATION => "segmentation violation",
-            _ => "unkown trapped signal",
+            EXCEPTION_DATATYPE_MISALIGNMENT => "datatype misalignment",
+            EXCEPTION_BREAKPOINT => "breakpoint",
+            EXCEPTION_SINGLE_STEP => "single step",
+            EXCEPTION_ARRAY_BOUNDS_EXCEEDED => "array bounds exceeded",
+            EXCEPTION_INT_DIVIDE_BY_ZERO => "int div by zero",
+            EXCEPTION_INT_OVERFLOW => "int overflow",
+            EXCEPTION_PRIV_INSTRUCTION => "priv instruction",
+            EXCEPTION_IN_PAGE_ERROR => "in page error",
+            EXCEPTION_NONCONTINUABLE_EXCEPTION => "non continuable exception",
+            EXCEPTION_STACK_OVERFLOW => "stack overflow",
+            EXCEPTION_GUARD_PAGE => "guard page",
+            EXCEPTION_INVALID_HANDLE => "invalid handle",
+            EXCEPTION_POSSIBLE_DEADLOCK => "possible deadlock",
+            _ => "unknown exception code",
         };
 
-        let s = format!("unknown trap at {} - {}", exception_address, signal);
+        let s = format!(
+            "unhandled trap at {:x} - code #{:x}: {}",
+            exception_address, code, signal,
+        );
 
         Err(CallProtError::Error(Box::new(s)))
     }

lib/singlepass-backend/src/protect_unix.rs

@@ -111,7 +111,7 @@ pub fn call_protected<T>(f: impl FnOnce() -> T) -> Result<T, CallProtError> {
                 //     Ok(SIGSEGV) => "segmentation violation",
                 //     Ok(SIGBUS) => "bus error",
                 //     Err(_) => "error while getting the Signal",
-                //     _ => "unkown trapped signal",
+                //     _ => "unknown trapped signal",
                 // };
                 // // When the trap-handler is fully implemented, this will return more information.
                 // Err(RuntimeError::Trap {

lib/win-exception-handler/exception_handling/exception_handling.c

@@ -5,6 +5,7 @@
 #define CALL_FIRST 1
 
 __declspec(thread) jmp_buf jmpBuf;
+__declspec(thread) DWORD caughtExceptionCode;
 __declspec(thread) PVOID caughtExceptionAddress;
 __declspec(thread) DWORD64 caughtInstructionPointer;
 __declspec(thread) PVOID savedStackPointer;
@@ -25,6 +26,7 @@ static LONG WINAPI
 exceptionHandler(struct _EXCEPTION_POINTERS *ExceptionInfo) {
     EXCEPTION_RECORD* pExceptionRecord = ExceptionInfo->ExceptionRecord;
     PCONTEXT pCONTEXT = ExceptionInfo->ContextRecord;
+    caughtExceptionCode = pExceptionRecord->ExceptionCode;
     caughtExceptionAddress = pExceptionRecord->ExceptionAddress;
     caughtInstructionPointer = pCONTEXT->Rip;
     if (alreadyHandlingException == TRUE) {
@@ -61,8 +63,9 @@ uint8_t callProtected(trampoline_t trampoline,
     }
 
     // jmp jmp jmp!
-    int signum = setjmp(jmpBuf);
+    int status = setjmp(jmpBuf);
-    if (signum == 0) {
+    if (status == 0) // 0 means the original call
+    {
         // save the stack pointer
         savedStackPointer = get_callee_frame_address();
         trampoline(ctx, func, param_vec, return_vec);
@@ -74,7 +77,7 @@ uint8_t callProtected(trampoline_t trampoline,
         return TRUE;
     }
 
-    out_result->code = (uint64_t)signum;
+    out_result->code = (uint64_t)caughtExceptionCode;
     out_result->exception_address = (uint64_t)caughtExceptionAddress;
     out_result->instruction_pointer = caughtInstructionPointer;