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-rw-r--r--erts/emulator/beam/code_ix.h86
1 files changed, 83 insertions, 3 deletions
diff --git a/erts/emulator/beam/code_ix.h b/erts/emulator/beam/code_ix.h
index 5f00b409ef..a28b0cd36e 100644
--- a/erts/emulator/beam/code_ix.h
+++ b/erts/emulator/beam/code_ix.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2012-2013. All Rights Reserved.
+ * Copyright Ericsson AB 2012-2017. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -56,12 +56,55 @@
# endif
# include "sys.h"
#endif
+
+#include "beam_opcodes.h"
+
struct process;
#define ERTS_NUM_CODE_IX 3
typedef unsigned ErtsCodeIndex;
+typedef struct ErtsCodeMFA_ {
+ Eterm module;
+ Eterm function;
+ Uint arity;
+} ErtsCodeMFA;
+
+/*
+ * The ErtsCodeInfo structure is used both in the Export entry
+ * and in the code as the function header.
+ */
+
+/* If you change the size of this, you also have to update the code
+ in ops.tab to reflect the new func_info size */
+typedef struct ErtsCodeInfo_ {
+ BeamInstr op; /* OpCode(i_func_info) */
+ union {
+ struct generic_bp* gen_bp; /* Trace breakpoint */
+#ifdef HIPE
+ void (*ncallee)(void);
+ struct hipe_call_count* hcc;
+#endif
+ }u;
+ ErtsCodeMFA mfa;
+} ErtsCodeInfo;
+
+/* Get the code associated with a ErtsCodeInfo ptr. */
+ERTS_GLB_INLINE
+BeamInstr *erts_codeinfo_to_code(ErtsCodeInfo *ci);
+
+/* Get the ErtsCodeInfo for from a code ptr. */
+ERTS_GLB_INLINE
+ErtsCodeInfo *erts_code_to_codeinfo(BeamInstr *I);
+
+/* Get the code associated with a ErtsCodeMFA ptr. */
+ERTS_GLB_INLINE
+BeamInstr *erts_codemfa_to_code(ErtsCodeMFA *mfa);
+
+/* Get the ErtsCodeMFA from a code ptr. */
+ERTS_GLB_INLINE
+ErtsCodeMFA *erts_code_to_codemfa(BeamInstr *I);
/* Called once at emulator initialization.
*/
@@ -100,7 +143,7 @@ void erts_release_code_write_permission(void);
* Must be followed by calls to either "end" and "commit" or "abort" before
* code write permission can be released.
*/
-void erts_start_staging_code_ix(void);
+void erts_start_staging_code_ix(int num_new);
/* End the staging.
* Preceded by "start" and must be followed by "commit".
@@ -121,10 +164,47 @@ void erts_abort_staging_code_ix(void);
int erts_has_code_write_permission(void);
#endif
-
+/* module/function/arity can be NIL/NIL/-1 when the MFA is pointing to some
+ invalid code, for instance unloaded_fun. */
+#define ASSERT_MFA(MFA) \
+ ASSERT((is_atom((MFA)->module) || is_nil((MFA)->module)) && \
+ (is_atom((MFA)->function) || is_nil((MFA)->function)) && \
+ (((MFA)->arity >= 0 && (MFA)->arity < 1024) || (MFA)->arity == -1))
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
+ERTS_GLB_INLINE
+BeamInstr *erts_codeinfo_to_code(ErtsCodeInfo *ci)
+{
+ ASSERT(ci->op == (BeamInstr) BeamOp(op_i_func_info_IaaI) || !ci->op);
+ ASSERT_MFA(&ci->mfa);
+ return (BeamInstr*)(ci + 1);
+}
+
+ERTS_GLB_INLINE
+ErtsCodeInfo *erts_code_to_codeinfo(BeamInstr *I)
+{
+ ErtsCodeInfo *ci = ((ErtsCodeInfo *)(((char *)(I)) - sizeof(ErtsCodeInfo)));
+ ASSERT(ci->op == (BeamInstr) BeamOp(op_i_func_info_IaaI) || !ci->op);
+ ASSERT_MFA(&ci->mfa);
+ return ci;
+}
+
+ERTS_GLB_INLINE
+BeamInstr *erts_codemfa_to_code(ErtsCodeMFA *mfa)
+{
+ ASSERT_MFA(mfa);
+ return (BeamInstr*)(mfa + 1);
+}
+
+ERTS_GLB_INLINE
+ErtsCodeMFA *erts_code_to_codemfa(BeamInstr *I)
+{
+ ErtsCodeMFA *mfa = ((ErtsCodeMFA *)(((char *)(I)) - sizeof(ErtsCodeMFA)));
+ ASSERT_MFA(mfa);
+ return mfa;
+}
+
extern erts_smp_atomic32_t the_active_code_index;
extern erts_smp_atomic32_t the_staging_code_index;