Changeset 99930 in vbox for trunk/src/VBox/VMM/include

Timestamp:

May 23, 2023 9:53:04 AM (21 months ago)

Author:

vboxsync

Message:

VMM/IEM: More recompiler work. bugref:10369

File:

• trunk/src/VBox/VMM/include/IEMInternal.h (modified) (1 diff)

trunk/src/VBox/VMM/include/IEMInternal.h

@@ -957 +957 @@
 # define IEM_GET_INSTR_LEN(a_pVCpu)     ((a_pVCpu)->iem.s.offOpcode)
 #endif
+
+/** @def IEM_TRY_SETJMP
+ * Wrapper around setjmp / try, hiding all the ugly differences.
+ *
+ * @note Use with extreme care as this is a fragile macro.
+ * @param   a_pVCpu     The cross context virtual CPU structure of the calling EMT.
+ * @param   a_rcTarget  The variable that should receive the status code in case
+ *                      of a longjmp/throw.
+ */
+/** @def IEM_TRY_SETJMP_AGAIN
+ * For when setjmp / try is used again in the same variable scope as a previous
+ * IEM_TRY_SETJMP invocation.
+ */
+/** @def IEM_CATCH_LONGJMP_BEGIN
+ * Start wrapper for catch / setjmp-else.
+ *
+ * This will set up a scope.
+ *
+ * @note Use with extreme care as this is a fragile macro.
+ * @param   a_pVCpu     The cross context virtual CPU structure of the calling EMT.
+ * @param   a_rcTarget  The variable that should receive the status code in case
+ *                      of a longjmp/throw.
+ */
+/** @def IEM_CATCH_LONGJMP_END
+ * End wrapper for catch / setjmp-else.
+ *
+ * This will close the scope set up by IEM_CATCH_LONGJMP_BEGIN and clean up the
+ * state.
+ *
+ * @note Use with extreme care as this is a fragile macro.
+ * @param   a_pVCpu     The cross context virtual CPU structure of the calling EMT.
+ */
+#if defined(IEM_WITH_SETJMP) || defined(DOXYGEN_RUNNING)
+# ifdef IEM_WITH_THROW_CATCH
+#  define IEM_TRY_SETJMP(a_pVCpu, a_rcTarget) \
+        a_rcTarget = VINF_SUCCESS; \
+        try
+#  define IEM_TRY_SETJMP_AGAIN(a_pVCpu, a_rcTarget) \
+        IEM_TRY_SETJMP(a_pVCpu, a_rcTarget)
+#  define IEM_CATCH_LONGJMP_BEGIN(a_pVCpu, a_rcTarget) \
+        catch (int rcThrown) \
+        { \
+            a_rcTarget = rcThrown
+#  define IEM_CATCH_LONGJMP_END(a_pVCpu) \
+        } \
+        ((void)0)
+# else  /* !IEM_WITH_THROW_CATCH */
+#  define IEM_TRY_SETJMP(a_pVCpu, a_rcTarget) \
+        jmp_buf  JmpBuf; \
+        jmp_buf * volatile pSavedJmpBuf = pVCpu->iem.s.CTX_SUFF(pJmpBuf); \
+        pVCpu->iem.s.CTX_SUFF(pJmpBuf) = &JmpBuf; \
+        if ((rcStrict = setjmp(JmpBuf)) == 0)
+#  define IEM_TRY_SETJMP_AGAIN(a_pVCpu, a_rcTarget) \
+        pSavedJmpBuf = pVCpu->iem.s.CTX_SUFF(pJmpBuf); \
+        pVCpu->iem.s.CTX_SUFF(pJmpBuf) = &JmpBuf; \
+        if ((rcStrict = setjmp(JmpBuf)) == 0)
+#  define IEM_CATCH_LONGJMP_BEGIN(a_pVCpu, a_rcTarget) \
+        else \
+        { \
+            ((void)0)
+#  define IEM_CATCH_LONGJMP_END(a_pVCpu) \
+        } \
+        (a_pVCpu)->iem.s.CTX_SUFF(pJmpBuf) = pSavedJmpBuf
+# endif /* !IEM_WITH_THROW_CATCH */
+#endif  /* IEM_WITH_SETJMP */