core/emit.h

/* **********************************************************
 * Copyright (c) 2000-2009 VMware, Inc.  All rights reserved.
 * **********************************************************/

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 * * Redistributions in binary form must reproduce the above copyright notice,
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 * * Neither the name of VMware, Inc. nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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/* Copyright (c) 2003-2007 Determina Corp. */
/* Copyright (c) 2001-2003 Massachusetts Institute of Technology */
/* Copyright (c) 2000-2001 Hewlett-Packard Company */

/*
 * emit.h - fragment code generation interfaces
 */

#ifndef _EMIT_H_
#define _EMIT_H_ 1

/* Emits code for ilist into the fcache, returns the created
 * fragment.  Adds the fragment to the fragment hashtable and
 * links it as a new fragment.
 */
fragment_t *
emit_fragment(dcontext_t *dcontext, app_pc tag,
              instrlist_t *ilist, uint flags, void *vmlist,
              bool link);

fragment_t *
emit_fragment_ex(dcontext_t *dcontext, app_pc tag,
                 instrlist_t *ilist, uint flags, void *vmlist,
                 bool link, bool visible);

/* Emits code for ilist into the fcache, returns the created fragment.
 * Does not add the fragment to the ftable, leaving it as an "invisible"
 * fragment.  This means it is the caller's responsibility to ensure
 * it is properly disposed of when done with.
 * The fragment is also not linked, to give the caller more flexibility.
 */
fragment_t *
emit_invisible_fragment(dcontext_t *dcontext, app_pc tag,
                        instrlist_t *ilist, uint flags, void *vmlist);

fragment_t *
emit_fragment_as_replacement(dcontext_t *dcontext, app_pc tag, instrlist_t *ilist,
                             uint flags, void *vmlist, fragment_t *replace);

# ifdef INTERNAL
void stress_test_recreate(dcontext_t *dcontext, fragment_t *f,
                          instrlist_t *ilist);
# endif

bool
final_exit_shares_prev_stub(dcontext_t *dcontext, instrlist_t *ilist, uint frag_flags);

/* Walks ilist and f's linkstubs, setting each linkstub_t's fields appropriately
 * for the corresponding exit cti in ilist.
 * If emit is true, also encodes each instr in ilist to f's cache slot,
 * increments stats for new fragments, and returns the final pc after all encodings.
 */
cache_pc
set_linkstub_fields(dcontext_t *dcontext, fragment_t *f, instrlist_t *ilist,
                    uint num_direct_stubs, uint num_indirect_stubs, bool emit);

#endif /* _EMIT_H_ */