static Val mkList (Task* task, int ngrps, gid gidset[]) {
// ======
//
// Convert array of gid_t into a list of gid_t
Val w;
// NOTE: We should do something about possible cleaning!!! XXX BUGGO FIXME
Val p = LIST_NIL;
while (ngrps-- > 0) {
//
WORD_ALLOC (task, w, (Val_Sized_Unt)(gidset[ngrps]));
LIST_CONS(task, p, w, p);
}
return p;
}
Val raise_error__may_heapclean (
//==========================
//
Task* task,
const char* altMsg,
const char* at, // C sourcefile and line number raising this error: "<foo.c:37>"
Roots* extra_roots
) {
// Raise the Mythryl exception RUNTIME_EXCEPTION, which is defined as:
//
// exception RUNTIME_EXCEPTION (String, Null_Or(System_Error) );
//
// We normally get invoked via either the
// RAISE_SYSERR__MAY_HEAPCLEAN or RAISE_ERROR__MAY_HEAPCLEAN macro from
//
// src/c/lib/raise-error.h
//
// For the time being, we use the errno value as the System_Error; eventually that
// will be represented by an (Int, String) pair. If alt_msg is non-zero,
// then use it as the error string and use NULL for the System_Error.
int error_number = errno; // Various calls can trash this value so preserve it early.
const char* msg;
char buf[32];
Val null_or_errno;
if (altMsg != NULL) {
//
msg = altMsg;
null_or_errno = OPTION_NULL;
} else if ((msg = strerror(error_number)) != NULL) {
null_or_errno = OPTION_THE( task, TAGGED_INT_FROM_C_INT(error_number) );
} else {
sprintf(buf, "<unknown error %d>", error_number);
msg = buf;
null_or_errno = OPTION_THE( task, TAGGED_INT_FROM_C_INT(error_number) );
}
#if (defined(DEBUG_OS_INTERFACE) || defined(DEBUG_TRACE_CCALL))
debug_say ("RaiseSysError: errno = %d, msg = \"%s\"\n",
(altMsg != NULL) ? -1 : error_number, msg);
#endif
Roots roots1 = { &null_or_errno, extra_roots };
Val errno_string = make_ascii_string_from_c_string__may_heapclean (task, msg, &roots1 );
Val at_list; // [] or [ "<foo.c:187>" ].
//
if (at != NULL) {
//
Roots roots2 = { &errno_string, &roots1 };
Val at_cstring
=
make_ascii_string_from_c_string__may_heapclean (task, at, &roots2 );
at_list = LIST_CONS(task, at_cstring, LIST_NIL);
} else {
at_list = LIST_NIL;
}
Val arg = make_two_slot_record( task, errno_string, null_or_errno);
Val syserr_exception = MAKE_EXCEPTION(task, PTR_CAST( Val, RUNTIME_EXCEPTION__GLOBAL), arg, at_list);
// Modify the task state so that 'syserr_exception'
// will be raised when Mythryl execution resumes:
//
raise_mythryl_exception( task, syserr_exception ); // raise_mythryl_exception is from src/c/main/run-mythryl-code-and-runtime-eventloop.c
return syserr_exception;
} // fun raise_error__may_heapclean
static Val read_in_compiled_file_list__may_heapclean (
// =========================================
//
Task* task,
const char* compiled_files_to_load_filename,
int* return_max_boot_path_len,
Roots* extra_roots
){
// Open given file and read from it the list of
// filenames of compiled_files to be later loaded.
// Return them as a Mythryl list of Mythryl strings:
#define BUF_LEN 1024 // "This should be plenty for two numbers." "640K should be enough for anyone."
char buf[ BUF_LEN ];
// Val* file_names = NULL;
char* name_buf = NULL;
int max_num_boot_files = MAX_NUMBER_OF_BOOT_FILES;
int max_boot_path_len = MAX_LENGTH_FOR_A_BOOTFILE_PATHNAME;
int file_count = 0;
FILE* list_fd = open_file( compiled_files_to_load_filename, FALSE );
fprintf (
stderr,
" load-compiledfiles.c: Reading file %s\n",
compiled_files_to_load_filename
);
if (log_fd) {
//
fprintf (
log_fd,
" load-compiledfiles.c: Reading file %s\n",
compiled_files_to_load_filename
);
}
Val file_list = LIST_NIL; Roots roots1 = { &file_list, extra_roots };
if (list_fd) {
// Read header:
//
for (;;) {
//
if (!fgets (buf, BUF_LEN, list_fd)) {
die (
"compiled_files_to_load file \"%s\" ends before end-of-header (first empty line)",
compiled_files_to_load_filename
);
}
{ char* p = buf;
while (*p == ' ' || *p == '\t') ++p; // Skip leading whitespace.
if (p[0] == '\n') break; // Header ends at first empty line.
if (p[0] == '#') continue; // Ignore comment lines.
if (strstr( p,"FILES=") == p) {
//
max_num_boot_files = strtoul(p+6, NULL, 0);
continue;
}
if (strstr(p,"MAX_LINE_LENGTH=") == p) {
//
max_boot_path_len = strtoul(p+16, NULL, 0) +2;
continue;
}
die (
"compiled_files_to_load file \"%s\" contains unrecognized header line \"%s\"",
compiled_files_to_load_filename,
p
);
}
}
if (max_num_boot_files < 0) {
//
die("compiled_files_to_load file \"%s\" contains negative files count?! (%d)",
compiled_files_to_load_filename,
max_num_boot_files
);
}
if (max_boot_path_len < 0) {
//
die("compiled_file_to_load file \"%s\" contains negative boot path len?! (%d)",
compiled_files_to_load_filename,
max_boot_path_len
);
}
*return_max_boot_path_len = max_boot_path_len; // Tell the calling function.
if (!(name_buf = MALLOC( max_boot_path_len ))) {
//
die ("unable to allocate space for .compiled file filenames");
}
// if (!(file_names = MALLOC( max_num_boot_files * sizeof(char*) ))) {
// //
// die ("Unable to allocate space for compiledfiles-to-load name table");
// }
// Read in the file names, converting them to
// Mythryl strings and saving them in a list:
//
while (fgets( name_buf, max_boot_path_len, list_fd )) {
// Skip leading whitespace:
//
char* p = name_buf;
while (*p == ' ' || *p == '\t') ++p;
// Ignore empty lines and comment lines:
//
if (*p == '\n') continue;
if (*p == '#') continue;
// Strip any trailing newline:
//
{ int j = strlen(p)-1;
//
if (p[j] == '\n') p[j] = '\0';
}
if (file_count >= max_num_boot_files) die ("too many files\n");
// If our agegroup0 buffer is more than half full,
// empty it by doing a heapcleaning. This is very
// conservative -- which is the way I like it. *grin*
//
if (agegroup0_freespace_in_bytes( task )
< agegroup0_usedspace_in_bytes( task )
){
call_heapcleaner_with_extra_roots( task, 0, &roots1 );
}
Val file_name = make_ascii_string_from_c_string__may_heapclean(task, p, &roots1 );
file_list = LIST_CONS(task, file_name, file_list);
}
if (name_buf) FREE( name_buf );
fclose( list_fd );
}
// Reverse filename list (to restore
// original order) and return it:
//
{ Val file_list2 = LIST_NIL; Roots roots2 = { &file_list2, &roots1 };
//
for (; file_list != LIST_NIL; file_list = LIST_TAIL(file_list)) {
//
Val file_name = LIST_HEAD(file_list);
//
file_list2 = LIST_CONS(task, file_name, file_list2);
// Again, if our agegroup0 buffer is more than
// half full, empty it by doing a heapcleaning:
//
if (agegroup0_freespace_in_bytes( task )
< agegroup0_usedspace_in_bytes( task )
){
call_heapcleaner_with_extra_roots( task, 0, &roots2 );
}
}
return file_list2;
}
}
Val make_package_literals_via_bytecode_interpreter (Task* task, Unt8* bytecode_vector, int bytecode_vector_length_in_bytes) {
//==============
//
// NOTE: We allocate all of the chunks in agegroup 1,
// but allocate the vector of literals in agegroup0.
//
// This fn gets exported to the Mythryl level as
//
// make_package_literals_via_bytecode_interpreter
// in
// src/lib/compiler/execution/code-segments/code-segment.pkg
// via
// src/c/lib/heap/make-package-literals-via-bytecode-interpreter.c
//
// Our ultimate invocation is in
//
// src/lib/compiler/execution/main/execute.pkg
int pc = 0;
// Check that sufficient space is available for the
// literal chunk that we are about to allocate.
// Note that the cons cell has already been accounted
// for in space_available (but not in space_needed).
//
#define GC_CHECK \
do { \
if (space_needed > space_available \
&& need_to_call_heapcleaner( task, space_needed + LIST_CONS_CELL_BYTESIZE) \
){ \
call_heapcleaner_with_extra_roots (task, 0, (Val *)&bytecode_vector, &stk, NULL); \
space_available = 0; \
\
} else { \
\
space_available -= space_needed; \
} \
} while (0)
#ifdef DEBUG_LITERALS
debug_say("make_package_literals_via_bytecode_interpreter: bytecode_vector = %#x, bytecode_vector_length_in_bytes = %d\n", bytecode_vector, bytecode_vector_length_in_bytes);
#endif
if (bytecode_vector_length_in_bytes <= 8) return HEAP_NIL;
Val_Sized_Unt magic
=
GET32(bytecode_vector); pc += 4;
Val_Sized_Unt max_depth /* This variable is currently unused, so suppress 'unused var' compiler warning: */ __attribute__((unused))
=
GET32(bytecode_vector); pc += 4;
if (magic != V1_MAGIC) {
die("bogus literal magic number %#x", magic);
}
Val stk = HEAP_NIL;
int space_available = 0;
for (;;) {
//
ASSERT(pc < bytecode_vector_length_in_bytes);
space_available -= LIST_CONS_CELL_BYTESIZE; // Space for stack cons cell.
if (space_available < ONE_K_BINARY) {
//
if (need_to_call_heapcleaner(task, 64*ONE_K_BINARY)) {
//
call_heapcleaner_with_extra_roots (task, 0, (Val *)&bytecode_vector, &stk, NULL);
}
space_available = 64*ONE_K_BINARY;
}
switch (bytecode_vector[ pc++ ]) {
//
case I_INT:
{ int i = GET32(bytecode_vector); pc += 4;
#ifdef DEBUG_LITERALS
debug_say("[%2d]: INT(%d)\n", pc-5, i);
#endif
LIST_CONS(task, stk, TAGGED_INT_FROM_C_INT(i), stk);
}
break;
case I_RAW32:
{
int i = GET32(bytecode_vector); pc += 4;
#ifdef DEBUG_LITERALS
debug_say("[%2d]: RAW32[%d]\n", pc-5, i);
#endif
Val result;
INT1_ALLOC(task, result, i);
LIST_CONS(task, stk, result, stk);
space_available -= 2*WORD_BYTESIZE;
}
break;
case I_RAW32L:
{
int n = GET32(bytecode_vector); pc += 4;
#ifdef DEBUG_LITERALS
debug_say("[%2d]: RAW32L(%d) [...]\n", pc-5, n);
#endif
ASSERT(n > 0);
int space_needed = 4*(n+1);
GC_CHECK;
LIB7_AllocWrite (task, 0, MAKE_TAGWORD(n, FOUR_BYTE_ALIGNED_NONPOINTER_DATA_BTAG));
for (int j = 1; j <= n; j++) {
//
int i = GET32(bytecode_vector); pc += 4;
LIB7_AllocWrite (task, j, (Val)i);
}
Val result = LIB7_Alloc(task, n );
LIST_CONS(task, stk, result, stk);
}
break;
case I_RAW64:
{
double d = get_double(&(bytecode_vector[pc])); pc += 8;
Val result;
REAL64_ALLOC(task, result, d);
#ifdef DEBUG_LITERALS
debug_say("[%2d]: RAW64[%f] @ %#x\n", pc-5, d, result);
#endif
LIST_CONS(task, stk, result, stk);
space_available -= 4*WORD_BYTESIZE; // Extra 4 bytes for alignment padding.
}
break;
case I_RAW64L:
{
int n = GET32(bytecode_vector); pc += 4;
#ifdef DEBUG_LITERALS
debug_say("[%2d]: RAW64L(%d) [...]\n", pc-5, n);
#endif
ASSERT(n > 0);
int space_needed = 8*(n+1);
GC_CHECK;
#ifdef ALIGN_FLOAT64S
// Force FLOAT64_BYTESIZE alignment (descriptor is off by one word)
//
task->heap_allocation_pointer = (Val*)((Punt)(task->heap_allocation_pointer) | WORD_BYTESIZE);
#endif
int j = 2*n; // Number of words.
LIB7_AllocWrite (task, 0, MAKE_TAGWORD(j, EIGHT_BYTE_ALIGNED_NONPOINTER_DATA_BTAG));
Val result = LIB7_Alloc(task, j );
for (int j = 0; j < n; j++) {
//
PTR_CAST(double*, result)[j] = get_double(&(bytecode_vector[pc])); pc += 8;
}
LIST_CONS(task, stk, result, stk);
}
break;
case I_STR:
{
int n = GET32(bytecode_vector); pc += 4;
#ifdef DEBUG_LITERALS
debug_say("[%2d]: STR(%d) [...]", pc-5, n);
#endif
if (n == 0) {
#ifdef DEBUG_LITERALS
debug_say("\n");
#endif
LIST_CONS(task, stk, ZERO_LENGTH_STRING__GLOBAL, stk);
break;
}
int j = BYTES_TO_WORDS(n+1); // '+1' to include space for '\0'.
// The space request includes space for the data-chunk header word and
// the sequence header chunk.
//
int space_needed = WORD_BYTESIZE*(j+1+3);
GC_CHECK;
// Allocate the data chunk:
//
LIB7_AllocWrite(task, 0, MAKE_TAGWORD(j, FOUR_BYTE_ALIGNED_NONPOINTER_DATA_BTAG));
LIB7_AllocWrite (task, j, 0); // So word-by-word string equality works.
Val result = LIB7_Alloc (task, j);
#ifdef DEBUG_LITERALS
debug_say(" @ %#x (%d words)\n", result, j);
#endif
memcpy (PTR_CAST(void*, result), &bytecode_vector[pc], n); pc += n;
// Allocate the header chunk:
//
SEQHDR_ALLOC(task, result, STRING_TAGWORD, result, n);
// Push on stack:
//
LIST_CONS(task, stk, result, stk);
}
break;
case I_LIT:
{
int n = GET32(bytecode_vector); pc += 4;
Val result = stk;
for (int j = 0; j < n; j++) {
//
result = LIST_TAIL(result);
}
#ifdef DEBUG_LITERALS
debug_say("[%2d]: LIT(%d) = %#x\n", pc-5, n, LIST_HEAD(result));
#endif
LIST_CONS(task, stk, LIST_HEAD(result), stk);
}
break;
case I_VECTOR:
{
int n = GET32(bytecode_vector); pc += 4;
#ifdef DEBUG_LITERALS
debug_say("[%2d]: VECTOR(%d) [", pc-5, n);
#endif
if (n == 0) {
#ifdef DEBUG_LITERALS
debug_say("]\n");
#endif
LIST_CONS(task, stk, ZERO_LENGTH_VECTOR__GLOBAL, stk);
break;
}
// The space request includes space
// for the data-chunk header word and
// the sequence header chunk.
//
int space_needed = WORD_BYTESIZE*(n+1+3);
GC_CHECK;
// Allocate the data chunk:
//
LIB7_AllocWrite(task, 0, MAKE_TAGWORD(n, RO_VECTOR_DATA_BTAG));
// Top of stack is last element in vector:
//
for (int j = n; j > 0; j--) {
//
LIB7_AllocWrite(task, j, LIST_HEAD(stk));
stk = LIST_TAIL(stk);
}
Val result = LIB7_Alloc(task, n );
// Allocate the header chunk:
//
SEQHDR_ALLOC(task, result, TYPEAGNOSTIC_RO_VECTOR_TAGWORD, result, n);
#ifdef DEBUG_LITERALS
debug_say("...] @ %#x\n", result);
#endif
LIST_CONS(task, stk, result, stk);
}
break;
case I_RECORD:
{
int n = GET32(bytecode_vector); pc += 4;
#ifdef DEBUG_LITERALS
debug_say("[%2d]: RECORD(%d) [", pc-5, n);
#endif
if (n == 0) {
#ifdef DEBUG_LITERALS
debug_say("]\n");
#endif
LIST_CONS(task, stk, HEAP_VOID, stk);
break;
} else {
int space_needed = 4*(n+1);
GC_CHECK;
LIB7_AllocWrite(task, 0, MAKE_TAGWORD(n, PAIRS_AND_RECORDS_BTAG));
}
// Top of stack is last element in record:
//
for (int j = n; j > 0; j--) {
//
LIB7_AllocWrite(task, j, LIST_HEAD(stk));
stk = LIST_TAIL(stk);
}
Val result = LIB7_Alloc(task, n );
#ifdef DEBUG_LITERALS
debug_say("...] @ %#x\n", result);
#endif
LIST_CONS(task, stk, result, stk);
}
break;
case I_RETURN:
ASSERT(pc == bytecode_vector_length_in_bytes);
#ifdef DEBUG_LITERALS
debug_say("[%2d]: RETURN(%#x)\n", pc-5, LIST_HEAD(stk));
#endif
return LIST_HEAD( stk );
break;
default:
die ("bogus literal opcode #%x @ %d", bytecode_vector[pc-1], pc-1);
} // switch
} // while
} // fun make_package_literals_via_bytecode_interpreter
