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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 represents the public API for the packfile subsystem. It provides
several routines for working with PackFile* structures, and various
packfile-related PMC types. Any PMC type for which VTABLE_get_pointer returns
a PackFile* structure, and VTABLE_set_pointer takes a PackFile* can be used
with this system to represent a PackFile*.
See F<docs/pdds/pdd13_bytecode.pod> for details about the subsystem and the
format of bytecode.
=head2 PackFile Manipulation Functions
=over 4
=cut
*/
#include "pf_private.h"
#include "api.str"
#include "pmc/pmc_sub.h"
#include "pmc/pmc_packfileview.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 compile_file(PARROT_INTERP, ARGIN(STRING *path), INTVAL is_pasm)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
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);
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,
ARGMOD(PackFile_Segment *seg),
ARGIN_NULLOK(void *user_data))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*seg);
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 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);
static void PackFile_Header_read_uuid(PARROT_INTERP,
ARGMOD(PackFile_Header *self),
ARGIN(const opcode_t *packed),
size_t packed_size)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self);
PARROT_WARN_UNUSED_RESULT
static int PackFile_Header_unpack(PARROT_INTERP,
ARGMOD(PackFile_Header *self),
ARGIN(const opcode_t *packed),
size_t packed_size,
INTVAL pf_options)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*self);
static void PackFile_Header_validate(PARROT_INTERP,
ARGIN(const PackFile_Header *self),
INTVAL pf_options)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
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 push_context(PARROT_INTERP)
__attribute__nonnull__(1);
PARROT_CAN_RETURN_NULL
static char * read_pbc_file_bytes_handle(PARROT_INTERP,
PIOHANDLE io,
INTVAL program_size)
__attribute__nonnull__(1);
PARROT_CAN_RETURN_NULL
static PackFile * read_pbc_file_packfile(PARROT_INTERP,
ARGIN(STRING * const fullname),
INTVAL program_size)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_CANNOT_RETURN_NULL
static PackFile* read_pbc_file_packfile_handle(PARROT_INTERP,
ARGIN(STRING * const fullname),
PIOHANDLE io,
INTVAL program_size)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_CANNOT_RETURN_NULL
static PMC* set_current_sub(PARROT_INTERP)
__attribute__nonnull__(1);
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_compile_file __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(path))
#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_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_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_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_Header_read_uuid __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(packed))
#define ASSERT_ARGS_PackFile_Header_unpack __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self) \
, PARROT_ASSERT_ARG(packed))
#define ASSERT_ARGS_PackFile_Header_validate __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(self))
#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_push_context __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_read_pbc_file_bytes_handle __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#define ASSERT_ARGS_read_pbc_file_packfile __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(fullname))
#define ASSERT_ARGS_read_pbc_file_packfile_handle __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(fullname))
#define ASSERT_ARGS_set_current_sub __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp))
#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 */
/*
=item C<void Parrot_pf_destroy(PARROT_INTERP, PackFile *pf)>
Destroys a C<PackFile>, and frees resources. This does not automatically free
garbage collectable objects contained in that packfile (STRING and PMC) if
they are referenced from other places.
Notice that this can cause problems, if a Packfile is destroyed, but some of
its contents are not destroyed, but those contents contain indirect references
to other things in the packfile which are destroyed. Use with caution.
=item C<void PackFile_destroy(PARROT_INTERP, PackFile *pf)>
Deprecated. Same as C<Parrot_pf_destroy>. Use Parrot_pf_destroy instead.
=cut
*/
PARROT_EXPORT
void
Parrot_pf_destroy(PARROT_INTERP, ARGMOD(PackFile *pf))
{
ASSERT_ARGS(Parrot_pf_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;
}
PARROT_EXPORT
void
PackFile_destroy(PARROT_INTERP, ARGMOD(PackFile *pf))
{
ASSERT_ARGS(PackFile_destroy)
Parrot_pf_destroy(interp, pf);
}
/*
=item C<INTVAL Parrot_pf_serialized_size(PARROT_INTERP, PackFile * pf)>
Returns the size, in bytes, that a packfile will be if serialized
=item C<STRING * Parrot_pf_serialize(PARROT_INTERP, PackFile * const pf)>
Serialize a PackFile * into a STRING buffer
=item C<PackFile * Parrot_pf_deserialize(PARROT_INTERP, STRING *str)>
Deserialize a packfile which is stored in a STRING buffer
=cut
*/
PARROT_EXPORT
INTVAL
Parrot_pf_serialized_size(PARROT_INTERP, ARGIN(PackFile * pf))
{
ASSERT_ARGS(Parrot_pf_serialized_size)
return PackFile_pack_size(interp, pf);
}
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
STRING *
Parrot_pf_serialize(PARROT_INTERP, ARGIN(PackFile * const pf))
{
ASSERT_ARGS(Parrot_pf_serialize)
STRING *str;
/* Calculate required memory */
const opcode_t length = PackFile_pack_size(interp, pf) * sizeof (opcode_t);
opcode_t * const ptr = (opcode_t*)Parrot_gc_allocate_memory_chunk(interp, length);
/* And pack it! */
PackFile_pack(interp, pf, ptr);
str = Parrot_str_new_init(interp, (const char*)ptr, length,
Parrot_binary_encoding_ptr, 0);
Parrot_gc_free_memory_chunk(interp, ptr);
return str;
}
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PackFile *
Parrot_pf_deserialize(PARROT_INTERP, ARGIN(STRING *str))
{
ASSERT_ARGS(Parrot_pf_deserialize)
PackFile * const pf = PackFile_new(interp, 0);
const opcode_t * const ptr =
(const opcode_t *)Parrot_str_cstring(interp, str);
const int length = Parrot_str_byte_length(interp, str);
if (!PackFile_unpack(interp, pf, ptr, length)) {
PackFile_destroy(interp, pf);
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_MALFORMED_PACKFILE, "Can't unpack packfile.");
}
return pf;
}
/*
=item C<void Parrot_pf_tag_constant(PARROT_INTERP, PackFile_ConstTable *ct,
const int tag_idx, const int const_idx)>
Tag a constant PMC with a constant STRING
=cut
*/
void
Parrot_pf_tag_constant(PARROT_INTERP, ARGIN(PackFile_ConstTable *ct),
const int tag_idx, const int const_idx)
{
ASSERT_ARGS(Parrot_pf_tag_constant)
int lo, hi, cur;
const STRING *tag = ct->str.constants[tag_idx];
/* allocate space */
if (ct->tag_map == NULL) {
ct->tag_map = mem_gc_allocate_n_zeroed_typed(interp, 1, PackFile_ConstTagPair);
ct->ntags = 1;
}
else {
ct->tag_map = mem_gc_realloc_n_typed_zeroed(interp, ct->tag_map, ct->ntags + 1, ct->ntags,
PackFile_ConstTagPair);
ct->ntags++;
}
/* find the slot to insert into */
lo = 0;
cur = 0;
hi = ct->ntags - 1;
while (lo < hi) {
cur = (lo + hi)/2;
switch (STRING_compare(interp, tag, ct->str.constants[ct->tag_map[cur].tag_idx])) {
case -1:
lo = ++cur;
break;
case 0:
lo = hi = cur;
break;
case 1:
hi = cur;
break;
}
}
memmove(&ct->tag_map[cur + 1], &ct->tag_map[cur],
((ct->ntags - 1) - cur) * sizeof (PackFile_ConstTagPair));
ct->tag_map[cur].tag_idx = tag_idx;
ct->tag_map[cur].const_idx = const_idx;
}
/*
=item C<PMC * Parrot_pf_subs_by_tag(PARROT_INTERP, PMC * pfpmc, STRING * flag)>
Get an array of Subs in the packfile by named flag.
=cut
*/
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_pf_subs_by_tag(PARROT_INTERP, ARGIN(PMC * pfpmc), ARGIN(STRING * flag))
{
ASSERT_ARGS(Parrot_pf_subs_by_tag)
PackFile * const pf = (PackFile*)VTABLE_get_pointer(interp, pfpmc);
int mode = 0;
PMC * const subs = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
if (!pf || !pf->cur_cs || !pf->cur_cs->const_table)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_UNEXPECTED_NULL,
"NULL or invalid packfile");
if (STRING_equal(interp, flag, CONST_STRING(interp, "load")))
mode = 1;
else if (STRING_equal(interp, flag, CONST_STRING(interp, "init")))
mode = 2;
{
PackFile_ConstTable * const ct = pf->cur_cs->const_table;
opcode_t flag_idx = -1;
int bottom_lo, bottom_hi, top_lo, top_hi, cur;
int i;
bottom_lo = top_lo = cur = 0;
bottom_hi = top_hi = ct->ntags;
/* find the first match (if any) */
while (flag_idx < 0) {
if (bottom_lo == top_hi) {
/* tag not present */
goto done_find_bounds;
}
cur = (bottom_lo + top_hi)/2;
switch (STRING_compare(interp, flag, ct->str.constants[ct->tag_map[cur].tag_idx])) {
case -1:
bottom_lo = cur + 1;
break;
case 0:
flag_idx = ct->tag_map[cur].tag_idx;
bottom_hi = cur;
top_lo = cur + 1;
break;
case 1:
top_hi = cur;
break;
}
}
/* find the bottom of the map's range with this tag */
while (bottom_lo < bottom_hi) {
cur = (bottom_lo + bottom_hi)/2;
if (ct->tag_map[cur].tag_idx == flag_idx)
bottom_hi = cur;
else
bottom_lo = cur + 1;
}
/* find the top */
while (top_lo < top_hi) {
cur = (top_lo + top_hi)/2;
if (ct->tag_map[cur].tag_idx == flag_idx)
top_lo = cur + 1;
else
top_hi = cur;
}
done_find_bounds:
for (i = bottom_lo; i < top_hi; i++)
VTABLE_push_pmc(interp, subs, ct->pmc.constants[ct->tag_map[i].const_idx]);
}
/* Backwards compatibility. :load is equivalent to "load" tag. :init is
equivalent to "init" tag */
if (mode == 1 || mode == 2) {
PackFile_ByteCode * const self = pf->cur_cs;
PackFile_ConstTable * const ct = self->const_table;
STRING * const SUB = CONST_STRING(interp, "Sub");
opcode_t i;
for (i = 0; i < ct->pmc.const_count; ++i) {
PMC * const sub_pmc = ct->pmc.constants[i];
Parrot_Sub_attributes *sub;
int pragmas;
if (!VTABLE_isa(interp, sub_pmc, SUB))
continue;
PMC_get_sub(interp, sub_pmc, sub);
pragmas = PObj_get_FLAGS(sub_pmc) & SUB_FLAG_PF_MASK & ~SUB_FLAG_IS_OUTER;
if (mode == 1 && (pragmas & SUB_FLAG_PF_LOAD))
VTABLE_push_pmc(interp, subs, sub_pmc);
else if (mode == 2 && Sub_comp_INIT_TEST(sub))
VTABLE_push_pmc(interp, subs, sub_pmc);
}
}
return subs;
}
/*
=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_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* 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 = PMCNULL;
PObj_get_FLAGS(sub_pmc) &= ~SUB_FLAG_PF_IMMEDIATE;
Parrot_pcc_invoke_sub_from_c_args(interp, sub_pmc, "->P", &result);
/* 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;
Parrot_pcc_invoke_sub_from_c_args(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;
Parrot_pcc_invoke_sub_from_c_args(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;
Parrot_pcc_invoke_sub_from_c_args(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)>
Mark one ConstTable segment for GC.
=cut
*/
static void
mark_1_ct_seg(PARROT_INTERP, ARGMOD(PackFile_ConstTable *ct))
{
ASSERT_ARGS(mark_1_ct_seg)
opcode_t i;
if (ct->string_hash)
Parrot_hash_mark(interp, ct->string_hash);
if (ct->pmc_hash)
Parrot_hash_mark(interp, ct->pmc_hash);
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, ARGMOD(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 Parrot_pf_mark_packfile(PARROT_INTERP, PackFile * pf)>
Mark the contents of a C<PackFile>.
=cut
*/
void
Parrot_pf_mark_packfile(PARROT_INTERP, ARGMOD_NULLOK(PackFile * pf))
{
ASSERT_ARGS(Parrot_pf_mark_packfile)
if (!pf)
return;
else {
/* locate top level dir */
PackFile_Directory * const dir = &pf->directory;
/* iterate over all dir/segs */
PackFile_map_segments(interp, dir, find_const_iter, NULL);
}
}
/*
=item C<PMC * Parrot_pf_get_packfile_main_sub(PARROT_INTERP, PMC * pbc)>
Get the main function of the bytecode segment, if any.
=item C<static PMC * packfile_main(PackFile_ByteCode *bc)>
Access the main function of a bytecode segment.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_pf_get_packfile_main_sub(PARROT_INTERP, ARGIN(PMC * pbc))
{
ASSERT_ARGS(Parrot_pf_get_packfile_main_sub)
PackFile * const pf = (PackFile*)VTABLE_get_pointer(interp, pbc);
if (pf == NULL || pf->cur_cs == NULL || pf->cur_cs->const_table == NULL)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_UNEXPECTED_NULL,
"Null or invalid PackFile");
return packfile_main(pf->cur_cs);
}
PARROT_CANNOT_RETURN_NULL
static PMC *
packfile_main(ARGIN(PackFile_ByteCode *bc))
{
ASSERT_ARGS(packfile_main)
const PackFile_ConstTable * const ct = bc->const_table;
if (!ct || !ct->pmc.constants || bc->main_sub < 0)
return PMCNULL;
return ct->pmc.constants[bc->main_sub];
}
/*
=item C<void do_sub_pragmas(PARROT_INTERP, PMC *pfpmc, pbc_action_enum_t action,
PMC *eval_pmc)>
C<action> is one of 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 action
: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.
This function and the entire underlying mechanism should be deprecated and
removed. See GH #428 for details.
=cut
*/
PARROT_EXPORT
void
do_sub_pragmas(PARROT_INTERP, ARGIN(PMC *pfpmc),
pbc_action_enum_t action, ARGIN_NULLOK(PMC *eval_pmc))
{
ASSERT_ARGS(do_sub_pragmas)
PackFile * const pf = (PackFile*)VTABLE_get_pointer(interp, pfpmc);
PackFile_ByteCode * const self = pf->cur_cs;
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);
if (action == 0)
continue;
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;
PARROT_GC_WRITE_BARRIER(interp, pfpmc);
}
}
}
}
if (interp->resume_flag & RESUME_INITIAL) {
if (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);
}
}
}
}
/*
=item C<static 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
*/
static 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);
}
if (self->byteorder != 0 && self->byteorder != 1) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_MALFORMED_PACKFILE,
"PackFile_Header_validate: Invalid byte ordering %d\n", self->byteorder);
}
if (self->floattype > FLOATTYPE_MAX) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_MALFORMED_PACKFILE,
"PackFile_Header_validate: Invalid floattype %d\n", self->floattype);
}
}
/*
=item C<static void PackFile_Header_read_uuid(PARROT_INTERP, PackFile_Header
*self, const opcode_t *packed, size_t packed_size)>
Reads a C<PackFile_Header>'s UUID from a block of memory and verifies that it
is valid.
=cut
*/
static void
PackFile_Header_read_uuid(PARROT_INTERP, ARGMOD(PackFile_Header *self),
ARGIN(const opcode_t *packed), size_t packed_size)
{
ASSERT_ARGS(PackFile_Header_read_uuid)
/* Check the UUID type is valid and, if needed, read a UUID. */
if (self->uuid_type == 0) {
/* No UUID; fine, nothing more to do. */
}
else if (self->uuid_type == 1) {
if (packed_size < (size_t) PACKFILE_HEADER_BYTES + self->uuid_size) {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_MALFORMED_PACKFILE,
"PackFile_Header_read_uuid: Buffer length %d is shorter than PACKFILE_HEADER_BYTES "
"+ uuid_size %d\n", packed_size, PACKFILE_HEADER_BYTES + self->uuid_size);
}
/* Read in the UUID. We'll put it in a NULL-terminated string, just in
* case people use it that way. */
self->uuid_data = mem_gc_allocate_n_typed(interp,
self->uuid_size + 1, unsigned char);
memcpy(self->uuid_data, packed + PACKFILE_HEADER_BYTES,
self->uuid_size);
/* NULL terminate */
self->uuid_data[self->uuid_size] = '\0';
}
else
/* Don't know this UUID type. */
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_MALFORMED_PACKFILE,
"PackFile_unpack: Invalid UUID type %d\n", self->uuid_type);
}
/*
=item C<static int PackFile_Header_unpack(PARROT_INTERP, PackFile_Header *self,
const opcode_t *packed, size_t packed_size, INTVAL pf_options)>
Unpacks a C<PackFile_Header> from a block of memory and perform some validation
to check that the head is correct.
Returns size of unpacked header.
=cut
*/
PARROT_WARN_UNUSED_RESULT
static int
PackFile_Header_unpack(PARROT_INTERP, ARGMOD(PackFile_Header *self),
ARGIN(const opcode_t *packed), size_t packed_size,
INTVAL pf_options)
{
ASSERT_ARGS(PackFile_Header_unpack)