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api.c
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api.c
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/*
Copyright (C) 2001-2011, Parrot Foundation.
This program is free software. It is subject to the same license as
Parrot itself.
=head1 NAME
src/packfile.c - Parrot PackFile API
=head1 DESCRIPTION
This file contains all the functions required for the processing of the
structure of a PackFile. It is not intended to understand the byte code
stream itself, but merely to dissect and reconstruct data from the
various segments. See F<docs/pdds/pdd13_bytecode.pod> for information
about the structure of the frozen bytecode.
=head2 PackFile Manipulation Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
#include "parrot/packfile.h"
#include "parrot/embed.h"
#include "parrot/extend.h"
#include "parrot/dynext.h"
#include "parrot/runcore_api.h"
#include "../compilers/imcc/imc.h"
#include "api.str"
#include "pmc/pmc_sub.h"
#include "pmc/pmc_key.h"
#include "pmc/pmc_callcontext.h"
#include "pmc/pmc_parrotlibrary.h"
#include "parrot/oplib/core_ops.h"
/* HEADERIZER HFILE: include/parrot/packfile.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
static void byte_code_destroy(PARROT_INTERP, ARGMOD(PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*self);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PackFile_Segment * byte_code_new(PARROT_INTERP,
SHIM(PackFile *pf),
SHIM(STRING *name),
SHIM(int add))
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static opcode_t * byte_code_pack(SHIM_INTERP,
ARGMOD(PackFile_Segment *self),
ARGOUT(opcode_t *cursor))
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self)
FUNC_MODIFIES(*cursor);
PARROT_WARN_UNUSED_RESULT
PARROT_PURE_FUNCTION
static size_t byte_code_packed_size(SHIM_INTERP,
ARGIN(PackFile_Segment *self))
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static const opcode_t * byte_code_unpack(PARROT_INTERP,
ARGMOD(PackFile_Segment *self),
ARGIN(const opcode_t *cursor))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self);
static void clone_constant(PARROT_INTERP, ARGIN(PMC **c))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void compile_file(PARROT_INTERP, ARGIN(STRING *path))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void const_destroy(PARROT_INTERP, ARGMOD(PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*self);
PARROT_MALLOC
PARROT_CANNOT_RETURN_NULL
static PackFile_Segment * const_new(PARROT_INTERP,
SHIM(PackFile *pf),
SHIM(STRING *name),
SHIM(int add))
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PackFile_Segment * create_seg(PARROT_INTERP,
ARGMOD(PackFile_Directory *dir),
pack_file_types t,
ARGIN(STRING *name),
ARGIN(STRING *file_name),
int add)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(4)
__attribute__nonnull__(5)
FUNC_MODIFIES(*dir);
static void default_destroy(PARROT_INTERP,
ARGFREE_NOTNULL(PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void default_dump(PARROT_INTERP, ARGIN(const PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static opcode_t * default_pack(
ARGIN(const PackFile_Segment *self),
ARGOUT(opcode_t *dest))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*dest);
static size_t default_packed_size(ARGIN(const PackFile_Segment *self))
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static const opcode_t * default_unpack(PARROT_INTERP,
ARGMOD(PackFile_Segment *self),
ARGIN(const opcode_t *cursor))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self);
static void directory_destroy(PARROT_INTERP, ARGMOD(PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*self);
static void directory_dump(PARROT_INTERP,
ARGIN(const PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PackFile_Segment * directory_new(PARROT_INTERP,
SHIM(PackFile *pf),
SHIM(STRING *name),
SHIM(int add))
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static opcode_t * directory_pack(PARROT_INTERP,
ARGIN(PackFile_Segment *self),
ARGOUT(opcode_t *cursor))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*cursor);
PARROT_WARN_UNUSED_RESULT
static size_t directory_packed_size(PARROT_INTERP,
ARGMOD(PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*self);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static const opcode_t * directory_unpack(PARROT_INTERP,
ARGMOD(PackFile_Segment *segp),
ARGIN(const opcode_t *cursor))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*segp);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC* do_1_sub_pragma(PARROT_INTERP,
ARGMOD(PMC *sub_pmc),
pbc_action_enum_t action)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*sub_pmc);
static INTVAL find_const_iter(PARROT_INTERP,
ARGIN(PackFile_Segment *seg),
ARGIN_NULLOK(void *user_data))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PackFile_ConstTable * find_constants(PARROT_INTERP,
ARGIN(PackFile_ConstTable *ct))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_PURE_FUNCTION
PARROT_WARN_UNUSED_RESULT
static INTVAL find_pf_ann_idx(
ARGIN(PackFile_Annotations *pfa),
ARGIN(PackFile_Annotations_Key *key),
UINTVAL offs)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void load_file(PARROT_INTERP, ARGIN(STRING *path))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void make_code_pointers(ARGMOD(PackFile_Segment *seg))
__attribute__nonnull__(1)
FUNC_MODIFIES(*seg);
static void mark_1_bc_seg(PARROT_INTERP, ARGMOD(PackFile_ByteCode *bc))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*bc);
static void mark_1_ct_seg(PARROT_INTERP, ARGMOD(PackFile_ConstTable *ct))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*ct);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PackFile * PackFile_append(PARROT_INTERP,
ARGIN_NULLOK(PackFile * const pf))
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PMC * PackFile_Constant_unpack_pmc(PARROT_INTERP,
ARGIN(PackFile_ConstTable *constt),
ARGIN(const opcode_t **cursor))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
PARROT_CANNOT_RETURN_NULL
static PMC * packfile_main(ARGIN(PackFile_ByteCode *bc))
__attribute__nonnull__(1);
static void PackFile_set_header(ARGOUT(PackFile_Header *header))
__attribute__nonnull__(1)
FUNC_MODIFIES(*header);
static void pf_debug_destroy(PARROT_INTERP, ARGMOD(PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*self);
static void pf_debug_dump(PARROT_INTERP,
ARGIN(const PackFile_Segment *self))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PackFile_Segment * pf_debug_new(PARROT_INTERP,
SHIM(PackFile *pf),
SHIM(STRING *name),
SHIM(int add))
__attribute__nonnull__(1);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static opcode_t * pf_debug_pack(PARROT_INTERP,
ARGMOD(PackFile_Segment *self),
ARGOUT(opcode_t *cursor))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self)
FUNC_MODIFIES(*cursor);
static size_t pf_debug_packed_size(SHIM_INTERP,
ARGIN(PackFile_Segment *self))
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static const opcode_t * pf_debug_unpack(PARROT_INTERP,
ARGOUT(PackFile_Segment *self),
ARGIN(const opcode_t *cursor))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self);
static void pf_register_standard_funcs(PARROT_INTERP, ARGMOD(PackFile *pf))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*pf);
static void push_context(PARROT_INTERP)
__attribute__nonnull__(1);
PARROT_IGNORABLE_RESULT
PARROT_CAN_RETURN_NULL
static PMC* run_sub(PARROT_INTERP, ARGIN(PMC *sub_pmc))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void segment_init(
ARGOUT(PackFile_Segment *self),
ARGIN(PackFile *pf),
ARGIN(STRING *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self);
static void sort_segs(ARGMOD(PackFile_Directory *dir))
__attribute__nonnull__(1)
FUNC_MODIFIES(*dir);
static int sub_pragma(PARROT_INTERP,
pbc_action_enum_t action,
ARGIN(const PMC *sub_pmc))
__attribute__nonnull__(1)
__attribute__nonnull__(3);
#define ASSERT_ARGS_byte_code_destroy __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_byte_code_new __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_byte_code_pack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_byte_code_packed_size __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_byte_code_unpack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_clone_constant __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(c))
#define ASSERT_ARGS_compile_file __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(path))
#define ASSERT_ARGS_const_destroy __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_const_new __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_create_seg __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(dir) \
, PARROT_ASSERT_ARG(name) \
, PARROT_ASSERT_ARG(file_name))
#define ASSERT_ARGS_default_destroy __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_default_dump __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_default_pack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(dest))
#define ASSERT_ARGS_default_packed_size __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_default_unpack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_directory_destroy __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_directory_dump __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_directory_new __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_directory_pack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_directory_packed_size __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_directory_unpack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(segp) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_do_1_sub_pragma __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(sub_pmc))
#define ASSERT_ARGS_find_const_iter __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(seg))
#define ASSERT_ARGS_find_constants __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(ct))
#define ASSERT_ARGS_find_pf_ann_idx __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(pfa) \
, PARROT_ASSERT_ARG(key))
#define ASSERT_ARGS_load_file __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(path))
#define ASSERT_ARGS_make_code_pointers __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(seg))
#define ASSERT_ARGS_mark_1_bc_seg __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(bc))
#define ASSERT_ARGS_mark_1_ct_seg __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(ct))
#define ASSERT_ARGS_PackFile_append __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_PackFile_Constant_unpack_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(constt) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_packfile_main __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(bc))
#define ASSERT_ARGS_PackFile_set_header __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(header))
#define ASSERT_ARGS_pf_debug_destroy __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_pf_debug_dump __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_pf_debug_new __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_pf_debug_pack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_pf_debug_packed_size __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(self))
#define ASSERT_ARGS_pf_debug_unpack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(cursor))
#define ASSERT_ARGS_pf_register_standard_funcs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(pf))
#define ASSERT_ARGS_push_context __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_run_sub __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(sub_pmc))
#define ASSERT_ARGS_segment_init __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(pf) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_sort_segs __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(dir))
#define ASSERT_ARGS_sub_pragma __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(sub_pmc))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/* Segment header:
1 op - Segment size
1 op - Internal type
1 op - Internal id
1 op - Size of theop array
See pdd13_bytecode: Packfile Segment Header
*/
#define SEGMENT_HEADER_SIZE 4
/* offset not in ptr diff, but in byte */
#define OFFS(pf, cursor) ((pf) ? ((const char *)(cursor) - (const char *)((pf)->src)) : 0)
/**
* Possible values for ALIGN_16
* 4 (32bit): 0 1 2 3
* 8 (64bit): 0 1
* e.g. reading 4 byte wordsize on 8 byte wordsize: possible ptrs end in 0 4 8 c.
* offs(c)/8 => 4/8 = 0 => impossible to align with 8 byte ptr.
* Limitation TT #254: ALIGN_16 may only be used native, e.g. in the writer,
* but not with 64bit reading 32bit!
*/
#define ROUND_16(val) (((val) & 0xf) ? 16 - ((val) & 0xf) : 0)
#define ALIGN_16(pf, cursor) \
(cursor) += ROUND_16(OFFS(pf, cursor))/sizeof (opcode_t)
/* pad to 16 in bytes */
#define PAD_16_B(size) ((size) % 16 ? 16 - (size) % 16 : 0)
/*
=item C<void PackFile_destroy(PARROT_INTERP, PackFile *pf)>
Deletes a C<PackFile>.
=cut
*/
PARROT_EXPORT
void
PackFile_destroy(PARROT_INTERP, ARGMOD(PackFile *pf))
{
ASSERT_ARGS(PackFile_destroy)
#ifdef PARROT_HAS_HEADER_SYSMMAN
if (pf->is_mmap_ped) {
DECL_CONST_CAST;
/* Cast the result to void to avoid a warning with
* some not-so-standard mmap headers
*/
munmap((void *)PARROT_const_cast(opcode_t *, pf->src), pf->size);
}
#endif
mem_gc_free(interp, pf->header);
pf->header = NULL;
mem_gc_free(interp, pf->dirp);
pf->dirp = NULL;
PackFile_Segment_destroy(interp, &pf->directory.base);
return;
}
/*
=item C<static void make_code_pointers(PackFile_Segment *seg)>
Makes compact/shorthand pointers.
The first segments read are the default segments.
=cut
*/
static void
make_code_pointers(ARGMOD(PackFile_Segment *seg))
{
ASSERT_ARGS(make_code_pointers)
PackFile * const pf = seg->pf;
switch (seg->type) {
case PF_BYTEC_SEG:
if (!pf->cur_cs)
pf->cur_cs = (PackFile_ByteCode *)seg;
break;
case PF_CONST_SEG:
if (!pf->cur_cs->const_table) {
pf->cur_cs->const_table = (PackFile_ConstTable *)seg;
pf->cur_cs->const_table->code = pf->cur_cs;
}
break;
case PF_UNKNOWN_SEG:
break;
case PF_DEBUG_SEG:
pf->cur_cs->debugs = (PackFile_Debug *)seg;
pf->cur_cs->debugs->code = pf->cur_cs;
break;
default:
break;
}
}
/*
=item C<static int sub_pragma(PARROT_INTERP, pbc_action_enum_t action, const PMC
*sub_pmc)>
Checks B<sub_pmc>'s pragmas (e.g. flags like C<:load>, C<:main>, etc.)
returning 1 if the sub should be run for C<action>, a C<pbc_action_enum_t>.
=cut
*/
static int
sub_pragma(PARROT_INTERP, pbc_action_enum_t action, ARGIN(const PMC *sub_pmc))
{
ASSERT_ARGS(sub_pragma)
/* Note: the const casting is only needed because of the
* internal details of the Sub_comp macros.
* The assumption is that the TEST versions are in fact const,
* so the casts are safe.
* These casts are a quick fix to allow parrot build with c++,
* a refactor of the macros will be a cleaner solution. */
DECL_CONST_CAST;
Parrot_Sub_attributes *sub;
int todo = 0;
const int pragmas = PObj_get_FLAGS(sub_pmc) & SUB_FLAG_PF_MASK
& ~SUB_FLAG_IS_OUTER;
PMC_get_sub(interp, PARROT_const_cast(PMC *, sub_pmc), sub);
if (!pragmas && !Sub_comp_INIT_TEST(sub))
return 0;
switch (action) {
case PBC_PBC:
case PBC_MAIN:
/* denote MAIN entry in first loaded PASM */
if (interp->resume_flag & RESUME_INITIAL)
todo = 1;
/* :init functions need to be called at MAIN time, so return 1 */
/* symreg.h:P_INIT */
if (Sub_comp_INIT_TEST(sub))
todo = 1;
break;
case PBC_LOADED:
/* symreg.h:P_LOAD */
if (pragmas & SUB_FLAG_PF_LOAD)
todo = 1;
break;
default:
break;
}
if (pragmas & (SUB_FLAG_PF_IMMEDIATE | SUB_FLAG_PF_POSTCOMP))
todo = 1;
return todo;
}
/*
=item C<static PMC* run_sub(PARROT_INTERP, PMC *sub_pmc)>
Runs the B<sub_pmc> due to its B<:load>, B<:immediate>, ... pragma
=cut
*/
PARROT_IGNORABLE_RESULT
PARROT_CAN_RETURN_NULL
static PMC*
run_sub(PARROT_INTERP, ARGIN(PMC *sub_pmc))
{
ASSERT_ARGS(run_sub)
Parrot_runcore_t * const old_core = interp->run_core;
PMC *retval = PMCNULL;
Parrot_pcc_set_constants(interp, CURRENT_CONTEXT(interp),
interp->code->const_table);
Parrot_ext_call(interp, sub_pmc, "->P", &retval);
interp->run_core = old_core;
return retval;
}
/*
=item C<static PMC* do_1_sub_pragma(PARROT_INTERP, PMC *sub_pmc,
pbc_action_enum_t action)>
Runs autoloaded or immediate bytecode, marking the MAIN subroutine entry.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC*
do_1_sub_pragma(PARROT_INTERP, ARGMOD(PMC *sub_pmc), pbc_action_enum_t action)
{
ASSERT_ARGS(do_1_sub_pragma)
Parrot_Sub_attributes *sub;
PMC_get_sub(interp, sub_pmc, sub);
switch (action) {
case PBC_IMMEDIATE:
/* run IMMEDIATE sub */
if (PObj_get_FLAGS(sub_pmc) & SUB_FLAG_PF_IMMEDIATE) {
void * const lo_var_ptr = interp->lo_var_ptr;
PMC *result;
PObj_get_FLAGS(sub_pmc) &= ~SUB_FLAG_PF_IMMEDIATE;
result = run_sub(interp, sub_pmc);
/* reset initial flag so MAIN detection works
* and reset lo_var_ptr to prev */
interp->resume_flag = RESUME_INITIAL;
interp->lo_var_ptr = lo_var_ptr;
return result;
}
break;
case PBC_POSTCOMP:
/* run POSTCOMP sub */
if (PObj_get_FLAGS(sub_pmc) & SUB_FLAG_PF_POSTCOMP) {
PObj_get_FLAGS(sub_pmc) &= ~SUB_FLAG_PF_POSTCOMP;
run_sub(interp, sub_pmc);
/* reset initial flag so MAIN detection works */
interp->resume_flag = RESUME_INITIAL;
return NULL;
}
break;
case PBC_LOADED:
if (PObj_get_FLAGS(sub_pmc) & SUB_FLAG_PF_LOAD) {
/* only run :init/:load subs once */
Sub_comp_INIT_CLEAR(sub);
PObj_get_FLAGS(sub_pmc) &= ~SUB_FLAG_PF_LOAD;
run_sub(interp, sub_pmc);
}
break;
case PBC_MAIN:
/* run :init/:load tagged functions */
if (Sub_comp_INIT_TEST(sub)) {
/* only run :init/:load subs once */
Sub_comp_INIT_CLEAR(sub);
PObj_get_FLAGS(sub_pmc) &= ~SUB_FLAG_PF_LOAD;
run_sub(interp, sub_pmc);
interp->resume_flag = RESUME_INITIAL;
}
break;
default:
break;
}
return NULL;
}
/*
=item C<static void mark_1_ct_seg(PARROT_INTERP, PackFile_ConstTable *ct)>
While the PMCs should be constant, their possible contents such as
properties aren't constructed const, so we have to mark them.
=cut
*/
static void
mark_1_ct_seg(PARROT_INTERP, ARGMOD(PackFile_ConstTable *ct))
{
ASSERT_ARGS(mark_1_ct_seg)
opcode_t i;
for (i = 0; i < ct->str.const_count; i++)
Parrot_gc_mark_STRING_alive(interp, ct->str.constants[i]);
for (i = 0; i < ct->pmc.const_count; i++)
Parrot_gc_mark_PMC_alive(interp, ct->pmc.constants[i]);
}
/*
=item C<static void mark_1_bc_seg(PARROT_INTERP, PackFile_ByteCode *bc)>
Mark gcables in bytecode header.
=cut
*/
static void
mark_1_bc_seg(PARROT_INTERP, ARGMOD(PackFile_ByteCode *bc))
{
ASSERT_ARGS(mark_1_bc_seg)
size_t i;
for (i = 0; i < bc->n_libdeps; i++)
Parrot_gc_mark_STRING_alive(interp, bc->libdeps[i]);
}
/*
=item C<static INTVAL find_const_iter(PARROT_INTERP, PackFile_Segment *seg, void
*user_data)>
Iterates over a PackFile_Directory, marking any constant segments. Internal
use only.
=cut
*/
static INTVAL
find_const_iter(PARROT_INTERP, ARGIN(PackFile_Segment *seg),
ARGIN_NULLOK(void *user_data))
{
ASSERT_ARGS(find_const_iter)
Parrot_gc_mark_STRING_alive(interp, seg->name);
switch (seg->type) {
case PF_DIR_SEG:
PackFile_map_segments(interp, (const PackFile_Directory *)seg,
find_const_iter, user_data);
break;
case PF_CONST_SEG:
mark_1_ct_seg(interp, (PackFile_ConstTable *)seg);
break;
case PF_BYTEC_SEG:
mark_1_bc_seg(interp, (PackFile_ByteCode *)seg);
break;
default:
break;
}
return 0;
}
/*
=item C<void mark_const_subs(PARROT_INTERP)>
Iterates over all directories and PackFile_Segments, finding and marking any
constant Subs.
=cut
*/
void
mark_const_subs(PARROT_INTERP)
{
ASSERT_ARGS(mark_const_subs)
PackFile * const self = interp->initial_pf;
if (!self)
return;
else {
/* locate top level dir */
PackFile_Directory * const dir = &self->directory;
/* iterate over all dir/segs */
PackFile_map_segments(interp, dir, find_const_iter, NULL);
}
}
/*
=item C<static PMC * packfile_main(PackFile_ByteCode *bc)>
Access the main function of a bytecode segment.
=cut
*/
PARROT_CANNOT_RETURN_NULL
static PMC *
packfile_main(ARGIN(PackFile_ByteCode *bc))
{
ASSERT_ARGS(packfile_main)
const PackFile_ConstTable * const ct = bc->const_table;
return ct->pmc.constants[bc->main_sub];
}
/*
=item C<void do_sub_pragmas(PARROT_INTERP, PackFile_ByteCode *self,
pbc_action_enum_t action, PMC *eval_pmc)>
C<action> is one of C<PBC_PBC>, C<PBC_LOADED>, C<PBC_INIT>, or C<PBC_MAIN>.
These determine which subs get executed at this point. Some rules:
:immediate subs always execute immediately
:postcomp subs always execute immediately
:main subs execute when we have the PBC_MAIN or PBC_PBC actions
:init subs execute when :main does
:load subs execute on PBC_LOAD
Also store the C<eval_pmc> in the sub structure, so that the eval PMC is kept
alive by living subs.
=cut
*/
PARROT_EXPORT
void
do_sub_pragmas(PARROT_INTERP, ARGIN(PackFile_ByteCode *self),
pbc_action_enum_t action, ARGIN_NULLOK(PMC *eval_pmc))
{
ASSERT_ARGS(do_sub_pragmas)
PackFile_ConstTable * const ct = self->const_table;
opcode_t i;
for (i = 0; i < ct->pmc.const_count; ++i) {
STRING * const SUB = CONST_STRING(interp, "Sub");
PMC * const sub_pmc = ct->pmc.constants[i];
if (VTABLE_isa(interp, sub_pmc, SUB)) {
Parrot_Sub_attributes *sub;
PMC_get_sub(interp, sub_pmc, sub);
sub->eval_pmc = eval_pmc;
if (((PObj_get_FLAGS(sub_pmc) & SUB_FLAG_PF_MASK)
|| (Sub_comp_get_FLAGS(sub) & SUB_COMP_FLAG_MASK))
&& sub_pragma(interp, action, sub_pmc)) {
PMC * const result = do_1_sub_pragma(interp, sub_pmc, action);
/* replace Sub PMC with computation results */
if (action == PBC_IMMEDIATE && !PMC_IS_NULL(result))
ct->pmc.constants[i] = result;
}
}
}
if (interp->resume_flag & RESUME_INITIAL) {
if (action == PBC_PBC
|| action == PBC_MAIN) {
if (self->main_sub < 0)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_LIBRARY_ERROR,
"No main sub found");
{
PMC * const mainsub = packfile_main(self);
opcode_t * const ptr = (opcode_t *)VTABLE_get_pointer(interp, mainsub);
Parrot_Sub_attributes *main_attrs;
PMC_get_sub(interp, mainsub, main_attrs);
interp->resume_offset = (ptr - main_attrs->seg->base.data);
Parrot_pcc_set_sub(interp, CURRENT_CONTEXT(interp), mainsub);
}
}
}
}
/*
=item C<void PackFile_Header_validate(PARROT_INTERP, const PackFile_Header
*self, INTVAL pf_options)>
Validates a C<PackFile_Header>, ensuring that the magic number is valid and
that Parrot can read this bytecode version.
Raises an exception if the header doesn't validate.
=cut
*/
PARROT_EXPORT
void
PackFile_Header_validate(PARROT_INTERP, ARGIN(const PackFile_Header *self),
INTVAL pf_options)
{
ASSERT_ARGS(PackFile_Header_validate)
/* Ensure the magic is correct. */
if (memcmp(self->magic, "\376PBC\r\n\032\n", 8) != 0) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_MALFORMED_PACKFILE,
"PackFile_Header_validate: This is not a valid Parrot bytecode file.");
}
/* Ensure the bytecode version is one we can read. Currently, we only
* support bytecode versions matching the current one.
*
* tools/dev/pbc_header.pl --upd t/native_pbc/(ASTERISK).pbc
* stamps version and fingerprint in the native tests.
* NOTE: (ASTERISK) is *, we don't want to fool the C preprocessor. */
if (self->bc_major != PARROT_PBC_MAJOR
|| self->bc_minor != PARROT_PBC_MINOR) {
if (!(pf_options & PFOPT_UTILS))
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_PARROT_USAGE_ERROR,
"PackFile_Header_validate: This Parrot cannot read bytecode "
"files with version %d.%d.",
self->bc_major, self->bc_minor);
}
/* Check wordsize, byte order and floating point number type are valid. */
if (self->wordsize != 4 && self->wordsize != 8) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_MALFORMED_PACKFILE,
"PackFile_Header_validate: Invalid wordsize %d\n", self->wordsize);