--- /dev/null
+/*
+ * Custom formatter for debug printing, allowing Duktape specific data
+ * structures (such as tagged values and heap objects) to be printed with
+ * a nice format string. Because debug printing should not affect execution
+ * state, formatting here must be independent of execution (see implications
+ * below) and must not allocate memory.
+ *
+ * Custom format tags begin with a '%!' to safely distinguish them from
+ * standard format tags. The following conversions are supported:
+ *
+ * %!T tagged value (duk_tval *)
+ * %!O heap object (duk_heaphdr *)
+ * %!I decoded bytecode instruction
+ * %!C bytecode instruction opcode name (arg is long)
+ *
+ * Everything is serialized in a JSON-like manner. The default depth is one
+ * level, internal prototype is not followed, and internal properties are not
+ * serialized. The following modifiers change this behavior:
+ *
+ * @ print pointers
+ * # print binary representations (where applicable)
+ * d deep traversal of own properties (not prototype)
+ * p follow prototype chain (useless without 'd')
+ * i include internal properties (other than prototype)
+ * x hexdump buffers
+ * h heavy formatting
+ *
+ * For instance, the following serializes objects recursively, but does not
+ * follow the prototype chain nor print internal properties: "%!dO".
+ *
+ * Notes:
+ *
+ * * Standard snprintf return value semantics seem to vary. This
+ * implementation returns the number of bytes it actually wrote
+ * (excluding the null terminator). If retval == buffer size,
+ * output was truncated (except for corner cases).
+ *
+ * * Output format is intentionally different from Ecmascript
+ * formatting requirements, as formatting here serves debugging
+ * of internals.
+ *
+ * * Depth checking (and updating) is done in each type printer
+ * separately, to allow them to call each other freely.
+ *
+ * * Some pathological structures might take ages to print (e.g.
+ * self recursion with 100 properties pointing to the object
+ * itself). To guard against these, each printer also checks
+ * whether the output buffer is full; if so, early exit.
+ *
+ * * Reference loops are detected using a loop stack.
+ */
+
+#include "duk_internal.h"
+
+#ifdef DUK_USE_DEBUG
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+/* list of conversion specifiers that terminate a format tag;
+ * this is unfortunately guesswork.
+ */
+#define DUK__ALLOWED_STANDARD_SPECIFIERS "diouxXeEfFgGaAcsCSpnm"
+
+/* maximum length of standard format tag that we support */
+#define DUK__MAX_FORMAT_TAG_LENGTH 32
+
+/* heapobj recursion depth when deep printing is selected */
+#define DUK__DEEP_DEPTH_LIMIT 8
+
+/* maximum recursion depth for loop detection stacks */
+#define DUK__LOOP_STACK_DEPTH 256
+
+/* must match bytecode defines now; build autogenerate? */
+DUK_LOCAL const char *duk__bc_optab[64] = {
+ "LDREG", "STREG", "LDCONST", "LDINT", "LDINTX", "MPUTOBJ", "MPUTOBJI", "MPUTARR", "MPUTARRI", "NEW",
+ "NEWI", "REGEXP", "CSREG", "CSREGI", "GETVAR", "PUTVAR", "DECLVAR", "DELVAR", "CSVAR", "CSVARI",
+ "CLOSURE", "GETPROP", "PUTPROP", "DELPROP", "CSPROP", "CSPROPI", "ADD", "SUB", "MUL", "DIV",
+ "MOD", "BAND", "BOR", "BXOR", "BASL", "BLSR", "BASR", "EQ", "NEQ", "SEQ",
+ "SNEQ", "GT", "GE", "LT", "LE", "IF", "JUMP", "RETURN", "CALL", "CALLI",
+ "TRYCATCH", "EXTRA", "PREINCR", "PREDECR", "POSTINCR", "POSTDECR", "PREINCV", "PREDECV", "POSTINCV", "POSTDECV",
+ "PREINCP", "PREDECP", "POSTINCP", "POSTDECP"
+};
+
+DUK_LOCAL const char *duk__bc_extraoptab[256] = {
+ "NOP", "INVALID", "LDTHIS", "LDUNDEF", "LDNULL", "LDTRUE", "LDFALSE", "NEWOBJ", "NEWARR", "SETALEN",
+ "TYPEOF", "TYPEOFID", "INITENUM", "NEXTENUM", "INITSET", "INITSETI", "INITGET", "INITGETI", "ENDTRY", "ENDCATCH",
+ "ENDFIN", "THROW", "INVLHS", "UNM", "UNP", "DEBUGGER", "BREAK", "CONTINUE", "BNOT", "LNOT",
+ "INSTOF", "IN", "LABEL", "ENDLABEL", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
+
+ "XXX", "XXX", "XXX", "XXX", "XXX", "XXX"
+};
+
+typedef struct duk__dprint_state duk__dprint_state;
+struct duk__dprint_state {
+ duk_fixedbuffer *fb;
+
+ /* loop_stack_index could be perhaps be replaced by 'depth', but it's nice
+ * to not couple these two mechanisms unnecessarily.
+ */
+ duk_hobject *loop_stack[DUK__LOOP_STACK_DEPTH];
+ duk_int_t loop_stack_index;
+ duk_int_t loop_stack_limit;
+
+ duk_int_t depth;
+ duk_int_t depth_limit;
+
+ duk_bool_t pointer;
+ duk_bool_t heavy;
+ duk_bool_t binary;
+ duk_bool_t follow_proto;
+ duk_bool_t internal;
+ duk_bool_t hexdump;
+};
+
+/* helpers */
+DUK_LOCAL_DECL void duk__print_hstring(duk__dprint_state *st, duk_hstring *k, duk_bool_t quotes);
+DUK_LOCAL_DECL void duk__print_hobject(duk__dprint_state *st, duk_hobject *h);
+DUK_LOCAL_DECL void duk__print_hbuffer(duk__dprint_state *st, duk_hbuffer *h);
+DUK_LOCAL_DECL void duk__print_tval(duk__dprint_state *st, duk_tval *tv);
+DUK_LOCAL_DECL void duk__print_instr(duk__dprint_state *st, duk_instr_t ins);
+DUK_LOCAL_DECL void duk__print_heaphdr(duk__dprint_state *st, duk_heaphdr *h);
+DUK_LOCAL_DECL void duk__print_shared_heaphdr(duk__dprint_state *st, duk_heaphdr *h);
+DUK_LOCAL_DECL void duk__print_shared_heaphdr_string(duk__dprint_state *st, duk_heaphdr_string *h);
+
+DUK_LOCAL void duk__print_shared_heaphdr(duk__dprint_state *st, duk_heaphdr *h) {
+ duk_fixedbuffer *fb = st->fb;
+
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "(%p)", (void *) h);
+ }
+
+ if (!h) {
+ return;
+ }
+
+ if (st->binary) {
+ duk_size_t i;
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET);
+ for (i = 0; i < (duk_size_t) sizeof(*h); i++) {
+ duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)h)[i]);
+ }
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET);
+ }
+
+#ifdef DUK_USE_REFERENCE_COUNTING /* currently implicitly also DUK_USE_DOUBLE_LINKED_HEAP */
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "[h_next=%p,h_prev=%p,h_refcount=%lu,h_flags=%08lx,type=%ld,"
+ "reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
+ (void *) DUK_HEAPHDR_GET_NEXT(NULL, h),
+ (void *) DUK_HEAPHDR_GET_PREV(NULL, h),
+ (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(h),
+ (unsigned long) DUK_HEAPHDR_GET_FLAGS(h),
+ (long) DUK_HEAPHDR_GET_TYPE(h),
+ (long) (DUK_HEAPHDR_HAS_REACHABLE(h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_TEMPROOT(h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZABLE(h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZED(h) ? 1 : 0));
+ }
+#else
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "[h_next=%p,h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
+ (void *) DUK_HEAPHDR_GET_NEXT(NULL, h),
+ (unsigned long) DUK_HEAPHDR_GET_FLAGS(h),
+ (long) DUK_HEAPHDR_GET_TYPE(h),
+ (long) (DUK_HEAPHDR_HAS_REACHABLE(h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_TEMPROOT(h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZABLE(h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZED(h) ? 1 : 0));
+ }
+#endif
+}
+
+DUK_LOCAL void duk__print_shared_heaphdr_string(duk__dprint_state *st, duk_heaphdr_string *h) {
+ duk_fixedbuffer *fb = st->fb;
+
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "(%p)", (void *) h);
+ }
+
+ if (!h) {
+ return;
+ }
+
+ if (st->binary) {
+ duk_size_t i;
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET);
+ for (i = 0; i < (duk_size_t) sizeof(*h); i++) {
+ duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)h)[i]);
+ }
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET);
+ }
+
+#ifdef DUK_USE_REFERENCE_COUNTING
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "[h_refcount=%lu,h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
+ (unsigned long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h),
+ (unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) h),
+ (long) DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h),
+ (long) (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_TEMPROOT((duk_heaphdr *) h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZABLE((duk_heaphdr *) h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) h) ? 1 : 0));
+ }
+#else
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "[h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
+ (unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) h),
+ (long) DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h),
+ (long) (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_TEMPROOT((duk_heaphdr *) h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZABLE((duk_heaphdr *) h) ? 1 : 0),
+ (long) (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) h) ? 1 : 0));
+ }
+#endif
+}
+
+DUK_LOCAL void duk__print_hstring(duk__dprint_state *st, duk_hstring *h, duk_bool_t quotes) {
+ duk_fixedbuffer *fb = st->fb;
+ const duk_uint8_t *p;
+ const duk_uint8_t *p_end;
+
+ /* terminal type: no depth check */
+
+ if (duk_fb_is_full(fb)) {
+ return;
+ }
+
+ duk__print_shared_heaphdr_string(st, &h->hdr);
+
+ if (!h) {
+ duk_fb_put_cstring(fb, "NULL");
+ return;
+ }
+
+ p = DUK_HSTRING_GET_DATA(h);
+ p_end = p + DUK_HSTRING_GET_BYTELEN(h);
+
+ if (p_end > p && p[0] == DUK_ASC_UNDERSCORE) {
+ /* if property key begins with underscore, encode it with
+ * forced quotes (e.g. "_Foo") to distinguish it from encoded
+ * internal properties (e.g. \xffBar -> _Bar).
+ */
+ quotes = 1;
+ }
+
+ if (quotes) {
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_DOUBLEQUOTE);
+ }
+ while (p < p_end) {
+ duk_uint8_t ch = *p++;
+
+ /* two special escapes: '\' and '"', other printables as is */
+ if (ch == '\\') {
+ duk_fb_sprintf(fb, "\\\\");
+ } else if (ch == '"') {
+ duk_fb_sprintf(fb, "\\\"");
+ } else if (ch >= 0x20 && ch <= 0x7e) {
+ duk_fb_put_byte(fb, ch);
+ } else if (ch == 0xff && !quotes) {
+ /* encode \xffBar as _Bar if no quotes are applied, this is for
+ * readable internal keys.
+ */
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_UNDERSCORE);
+ } else {
+ duk_fb_sprintf(fb, "\\x%02lx", (unsigned long) ch);
+ }
+ }
+ if (quotes) {
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_DOUBLEQUOTE);
+ }
+#ifdef DUK_USE_REFERENCE_COUNTING
+ /* XXX: limit to quoted strings only, to save keys from being cluttered? */
+ duk_fb_sprintf(fb, "/%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(&h->hdr));
+#endif
+}
+
+#ifdef DUK__COMMA
+#undef DUK__COMMA
+#endif
+#define DUK__COMMA() do { \
+ if (first) { \
+ first = 0; \
+ } else { \
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COMMA); \
+ } \
+ } while (0)
+
+DUK_LOCAL void duk__print_hobject(duk__dprint_state *st, duk_hobject *h) {
+ duk_fixedbuffer *fb = st->fb;
+ duk_uint_fast32_t i;
+ duk_tval *tv;
+ duk_hstring *key;
+ duk_bool_t first = 1;
+ const char *brace1 = "{";
+ const char *brace2 = "}";
+ duk_bool_t pushed_loopstack = 0;
+
+ if (duk_fb_is_full(fb)) {
+ return;
+ }
+
+ duk__print_shared_heaphdr(st, &h->hdr);
+
+ if (h && DUK_HOBJECT_HAS_ARRAY_PART(h)) {
+ brace1 = "[";
+ brace2 = "]";
+ }
+
+ if (!h) {
+ duk_fb_put_cstring(fb, "NULL");
+ goto finished;
+ }
+
+ if (st->depth >= st->depth_limit) {
+ if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
+ duk_fb_sprintf(fb, "%sobject/compiledfunction %p%s", (const char *) brace1, (void *) h, (const char *) brace2);
+ } else if (DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
+ duk_fb_sprintf(fb, "%sobject/nativefunction %p%s", (const char *) brace1, (void *) h, (const char *) brace2);
+ } else if (DUK_HOBJECT_IS_THREAD(h)) {
+ duk_fb_sprintf(fb, "%sobject/thread %p%s", (const char *) brace1, (void *) h, (const char *) brace2);
+ } else {
+ duk_fb_sprintf(fb, "%sobject %p%s", (const char *) brace1, (void *) h, (const char *) brace2); /* may be NULL */
+ }
+ return;
+ }
+
+ for (i = 0; i < (duk_uint_fast32_t) st->loop_stack_index; i++) {
+ if (st->loop_stack[i] == h) {
+ duk_fb_sprintf(fb, "%sLOOP:%p%s", (const char *) brace1, (void *) h, (const char *) brace2);
+ return;
+ }
+ }
+
+ /* after this, return paths should 'goto finished' for decrement */
+ st->depth++;
+
+ if (st->loop_stack_index >= st->loop_stack_limit) {
+ duk_fb_sprintf(fb, "%sOUT-OF-LOOP-STACK%s", (const char *) brace1, (const char *) brace2);
+ goto finished;
+ }
+ st->loop_stack[st->loop_stack_index++] = h;
+ pushed_loopstack = 1;
+
+ /*
+ * Notation: double underscore used for internal properties which are not
+ * stored in the property allocation (e.g. '__valstack').
+ */
+
+ duk_fb_put_cstring(fb, brace1);
+
+ if (DUK_HOBJECT_GET_PROPS(NULL, h)) {
+ duk_uint32_t a_limit;
+
+ a_limit = DUK_HOBJECT_GET_ASIZE(h);
+ if (st->internal) {
+ /* dump all allocated entries, unused entries print as 'unused',
+ * note that these may extend beyond current 'length' and look
+ * a bit funny.
+ */
+ } else {
+ /* leave out trailing 'unused' elements */
+ while (a_limit > 0) {
+ tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, a_limit - 1);
+ if (!DUK_TVAL_IS_UNUSED(tv)) {
+ break;
+ }
+ a_limit--;
+ }
+ }
+
+ for (i = 0; i < a_limit; i++) {
+ tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, i);
+ DUK__COMMA();
+ duk__print_tval(st, tv);
+ }
+ for (i = 0; i < DUK_HOBJECT_GET_ENEXT(h); i++) {
+ key = DUK_HOBJECT_E_GET_KEY(NULL, h, i);
+ if (!key) {
+ continue;
+ }
+ if (!st->internal &&
+ DUK_HSTRING_GET_BYTELEN(key) > 0 &&
+ DUK_HSTRING_GET_DATA(key)[0] == 0xff) {
+ /* XXX: use DUK_HSTRING_FLAG_INTERNAL? */
+ continue;
+ }
+ DUK__COMMA();
+ duk__print_hstring(st, key, 0);
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COLON);
+ if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(NULL, h, i)) {
+ duk_fb_sprintf(fb, "[get:%p,set:%p]",
+ (void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.get,
+ (void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.set);
+ } else {
+ tv = &DUK_HOBJECT_E_GET_VALUE(NULL, h, i).v;
+ duk__print_tval(st, tv);
+ }
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "<%02lx>", (unsigned long) DUK_HOBJECT_E_GET_FLAGS(NULL, h, i));
+ }
+ }
+ }
+ if (st->internal) {
+ if (DUK_HOBJECT_HAS_EXTENSIBLE(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__extensible:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_CONSTRUCTABLE(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__constructable:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_BOUND(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__bound:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_COMPILEDFUNCTION(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__compiledfunction:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_NATIVEFUNCTION(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__nativefunction:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_THREAD(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__thread:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_ARRAY_PART(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__array_part:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_STRICT(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__strict:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_NEWENV(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__newenv:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_NAMEBINDING(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__namebinding:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_CREATEARGS(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__createargs:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_ENVRECCLOSED(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__envrecclosed:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_array:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_stringobj:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_arguments:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_EXOTIC_DUKFUNC(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_dukfunc:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_bufferobj:true");
+ } else {
+ ;
+ }
+ if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h)) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_proxyobj:true");
+ } else {
+ ;
+ }
+ }
+ if (st->internal && DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
+ duk_hcompiledfunction *f = (duk_hcompiledfunction *) h;
+ DUK__COMMA(); duk_fb_put_cstring(fb, "__data:");
+ duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPILEDFUNCTION_GET_DATA(NULL, f));
+ DUK__COMMA(); duk_fb_sprintf(fb, "__nregs:%ld", (long) f->nregs);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs);
+#if defined(DUK_USE_DEBUGGER_SUPPORT)
+ DUK__COMMA(); duk_fb_sprintf(fb, "__start_line:%ld", (long) f->start_line);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__end_line:%ld", (long) f->end_line);
+#endif
+ DUK__COMMA(); duk_fb_put_cstring(fb, "__data:");
+ duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPILEDFUNCTION_GET_DATA(NULL, f));
+ } else if (st->internal && DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
+ duk_hnativefunction *f = (duk_hnativefunction *) h;
+ DUK__COMMA(); duk_fb_sprintf(fb, "__func:");
+ duk_fb_put_funcptr(fb, (duk_uint8_t *) &f->func, sizeof(f->func));
+ DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__magic:%ld", (long) f->magic);
+ } else if (st->internal && DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
+ duk_hbufferobject *b = (duk_hbufferobject *) h;
+ DUK__COMMA(); duk_fb_sprintf(fb, "__buf:");
+ duk__print_hbuffer(st, (duk_hbuffer *) b->buf);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__offset:%ld", (long) b->offset);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__length:%ld", (long) b->length);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__shift:%ld", (long) b->shift);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__elemtype:%ld", (long) b->elem_type);
+ } else if (st->internal && DUK_HOBJECT_IS_THREAD(h)) {
+ duk_hthread *t = (duk_hthread *) h;
+ DUK__COMMA(); duk_fb_sprintf(fb, "__strict:%ld", (long) t->strict);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__state:%ld", (long) t->state);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__unused1:%ld", (long) t->unused1);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__unused2:%ld", (long) t->unused2);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_max:%ld", (long) t->valstack_max);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_max:%ld", (long) t->callstack_max);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_max:%ld", (long) t->catchstack_max);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__valstack:%p", (void *) t->valstack);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_end:%p/%ld", (void *) t->valstack_end, (long) (t->valstack_end - t->valstack));
+ DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_bottom:%p/%ld", (void *) t->valstack_bottom, (long) (t->valstack_bottom - t->valstack));
+ DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_top:%p/%ld", (void *) t->valstack_top, (long) (t->valstack_top - t->valstack));
+ DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack:%p", (void *) t->catchstack);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_size:%ld", (long) t->catchstack_size);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_top:%ld", (long) t->catchstack_top);
+ DUK__COMMA(); duk_fb_sprintf(fb, "__resumer:"); duk__print_hobject(st, (duk_hobject *) t->resumer);
+ /* XXX: print built-ins array? */
+
+ }
+#ifdef DUK_USE_REFERENCE_COUNTING
+ if (st->internal) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__refcount:%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h));
+ }
+#endif
+ if (st->internal) {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__class:%ld", (long) DUK_HOBJECT_GET_CLASS_NUMBER(h));
+ }
+
+ DUK__COMMA(); duk_fb_sprintf(fb, "__heapptr:%p", (void *) h); /* own pointer */
+
+ /* prototype should be last, for readability */
+ if (DUK_HOBJECT_GET_PROTOTYPE(NULL, h)) {
+ if (st->follow_proto) {
+ DUK__COMMA(); duk_fb_put_cstring(fb, "__prototype:"); duk__print_hobject(st, DUK_HOBJECT_GET_PROTOTYPE(NULL, h));
+ } else {
+ DUK__COMMA(); duk_fb_sprintf(fb, "__prototype:%p", (void *) DUK_HOBJECT_GET_PROTOTYPE(NULL, h));
+ }
+ }
+
+ duk_fb_put_cstring(fb, brace2);
+
+#if defined(DUK_USE_HOBJECT_HASH_PART)
+ if (st->heavy && DUK_HOBJECT_GET_HSIZE(h) > 0) {
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE);
+ for (i = 0; i < DUK_HOBJECT_GET_HSIZE(h); i++) {
+ duk_uint_t h_idx = DUK_HOBJECT_H_GET_INDEX(NULL, h, i);
+ if (i > 0) {
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COMMA);
+ }
+ if (h_idx == DUK_HOBJECT_HASHIDX_UNUSED) {
+ duk_fb_sprintf(fb, "u");
+ } else if (h_idx == DUK_HOBJECT_HASHIDX_DELETED) {
+ duk_fb_sprintf(fb, "d");
+ } else {
+ duk_fb_sprintf(fb, "%ld", (long) h_idx);
+ }
+ }
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE);
+ }
+#endif
+
+ finished:
+ st->depth--;
+ if (pushed_loopstack) {
+ st->loop_stack_index--;
+ st->loop_stack[st->loop_stack_index] = NULL;
+ }
+}
+
+#undef DUK__COMMA
+
+DUK_LOCAL void duk__print_hbuffer(duk__dprint_state *st, duk_hbuffer *h) {
+ duk_fixedbuffer *fb = st->fb;
+ duk_size_t i, n;
+ duk_uint8_t *p;
+
+ if (duk_fb_is_full(fb)) {
+ return;
+ }
+
+ /* terminal type: no depth check */
+
+ if (!h) {
+ duk_fb_put_cstring(fb, "NULL");
+ return;
+ }
+
+ if (DUK_HBUFFER_HAS_DYNAMIC(h)) {
+ if (DUK_HBUFFER_HAS_EXTERNAL(h)) {
+ duk_hbuffer_external *g = (duk_hbuffer_external *) h;
+ duk_fb_sprintf(fb, "buffer:external:%p:%ld",
+ (void *) DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(NULL, g),
+ (long) DUK_HBUFFER_EXTERNAL_GET_SIZE(g));
+ } else {
+ duk_hbuffer_dynamic *g = (duk_hbuffer_dynamic *) h;
+ duk_fb_sprintf(fb, "buffer:dynamic:%p:%ld",
+ (void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(NULL, g),
+ (long) DUK_HBUFFER_DYNAMIC_GET_SIZE(g));
+ }
+ } else {
+ duk_fb_sprintf(fb, "buffer:fixed:%ld", (long) DUK_HBUFFER_GET_SIZE(h));
+ }
+
+#ifdef DUK_USE_REFERENCE_COUNTING
+ duk_fb_sprintf(fb, "/%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(&h->hdr));
+#endif
+
+ if (st->hexdump) {
+ duk_fb_sprintf(fb, "=[");
+ n = DUK_HBUFFER_GET_SIZE(h);
+ p = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(NULL, h);
+ for (i = 0; i < n; i++) {
+ duk_fb_sprintf(fb, "%02lx", (unsigned long) p[i]);
+ }
+ duk_fb_sprintf(fb, "]");
+ }
+}
+
+DUK_LOCAL void duk__print_heaphdr(duk__dprint_state *st, duk_heaphdr *h) {
+ duk_fixedbuffer *fb = st->fb;
+
+ if (duk_fb_is_full(fb)) {
+ return;
+ }
+
+ if (!h) {
+ duk_fb_put_cstring(fb, "NULL");
+ return;
+ }
+
+ switch (DUK_HEAPHDR_GET_TYPE(h)) {
+ case DUK_HTYPE_STRING:
+ duk__print_hstring(st, (duk_hstring *) h, 1);
+ break;
+ case DUK_HTYPE_OBJECT:
+ duk__print_hobject(st, (duk_hobject *) h);
+ break;
+ case DUK_HTYPE_BUFFER:
+ duk__print_hbuffer(st, (duk_hbuffer *) h);
+ break;
+ default:
+ duk_fb_sprintf(fb, "[unknown htype %ld]", (long) DUK_HEAPHDR_GET_TYPE(h));
+ break;
+ }
+}
+
+DUK_LOCAL void duk__print_tval(duk__dprint_state *st, duk_tval *tv) {
+ duk_fixedbuffer *fb = st->fb;
+
+ if (duk_fb_is_full(fb)) {
+ return;
+ }
+
+ /* depth check is done when printing an actual type */
+
+ if (st->heavy) {
+ duk_fb_sprintf(fb, "(%p)", (void *) tv);
+ }
+
+ if (!tv) {
+ duk_fb_put_cstring(fb, "NULL");
+ return;
+ }
+
+ if (st->binary) {
+ duk_size_t i;
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET);
+ for (i = 0; i < (duk_size_t) sizeof(*tv); i++) {
+ duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)tv)[i]);
+ }
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET);
+ }
+
+ if (st->heavy) {
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE);
+ }
+ switch (DUK_TVAL_GET_TAG(tv)) {
+ case DUK_TAG_UNDEFINED: {
+ duk_fb_put_cstring(fb, "undefined");
+ break;
+ }
+ case DUK_TAG_UNUSED: {
+ duk_fb_put_cstring(fb, "unused");
+ break;
+ }
+ case DUK_TAG_NULL: {
+ duk_fb_put_cstring(fb, "null");
+ break;
+ }
+ case DUK_TAG_BOOLEAN: {
+ duk_fb_put_cstring(fb, DUK_TVAL_GET_BOOLEAN(tv) ? "true" : "false");
+ break;
+ }
+ case DUK_TAG_STRING: {
+ /* Note: string is a terminal heap object, so no depth check here */
+ duk__print_hstring(st, DUK_TVAL_GET_STRING(tv), 1);
+ break;
+ }
+ case DUK_TAG_OBJECT: {
+ duk__print_hobject(st, DUK_TVAL_GET_OBJECT(tv));
+ break;
+ }
+ case DUK_TAG_BUFFER: {
+ duk__print_hbuffer(st, DUK_TVAL_GET_BUFFER(tv));
+ break;
+ }
+ case DUK_TAG_POINTER: {
+ duk_fb_sprintf(fb, "pointer:%p", (void *) DUK_TVAL_GET_POINTER(tv));
+ break;
+ }
+ case DUK_TAG_LIGHTFUNC: {
+ duk_c_function func;
+ duk_small_uint_t lf_flags;
+
+ DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags);
+ duk_fb_sprintf(fb, "lightfunc:");
+ duk_fb_put_funcptr(fb, (duk_uint8_t *) &func, sizeof(func));
+ duk_fb_sprintf(fb, ":%04lx", (long) lf_flags);
+ break;
+ }
+#if defined(DUK_USE_FASTINT)
+ case DUK_TAG_FASTINT:
+#endif
+ default: {
+ /* IEEE double is approximately 16 decimal digits; print a couple extra */
+ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
+ DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
+ duk_fb_sprintf(fb, "%.18g", (double) DUK_TVAL_GET_NUMBER(tv));
+ break;
+ }
+ }
+ if (st->heavy) {
+ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE);
+ }
+}
+
+DUK_LOCAL void duk__print_instr(duk__dprint_state *st, duk_instr_t ins) {
+ duk_fixedbuffer *fb = st->fb;
+ duk_small_int_t op;
+ const char *op_name;
+ const char *extraop_name;
+
+ op = (duk_small_int_t) DUK_DEC_OP(ins);
+ op_name = duk__bc_optab[op];
+
+ /* XXX: option to fix opcode length so it lines up nicely */
+
+ if (op == DUK_OP_EXTRA) {
+ extraop_name = duk__bc_extraoptab[DUK_DEC_A(ins)];
+
+ duk_fb_sprintf(fb, "%s %ld, %ld",
+ (const char *) extraop_name, (long) DUK_DEC_B(ins), (long) DUK_DEC_C(ins));
+ } else if (op == DUK_OP_JUMP) {
+ duk_int_t diff1 = DUK_DEC_ABC(ins) - DUK_BC_JUMP_BIAS; /* from next pc */
+ duk_int_t diff2 = diff1 + 1; /* from curr pc */
+
+ duk_fb_sprintf(fb, "%s %ld (to pc%c%ld)",
+ (const char *) op_name, (long) diff1,
+ (int) (diff2 >= 0 ? '+' : '-'), /* char format: use int */
+ (long) (diff2 >= 0 ? diff2 : -diff2));
+ } else {
+ duk_fb_sprintf(fb, "%s %ld, %ld, %ld",
+ (const char *) op_name, (long) DUK_DEC_A(ins),
+ (long) DUK_DEC_B(ins), (long) DUK_DEC_C(ins));
+ }
+}
+
+DUK_LOCAL void duk__print_opcode(duk__dprint_state *st, duk_small_int_t opcode) {
+ duk_fixedbuffer *fb = st->fb;
+
+ if (opcode < DUK_BC_OP_MIN || opcode > DUK_BC_OP_MAX) {
+ duk_fb_sprintf(fb, "?(%ld)", (long) opcode);
+ } else {
+ duk_fb_sprintf(fb, "%s", (const char *) duk__bc_optab[opcode]);
+ }
+}
+
+DUK_INTERNAL duk_int_t duk_debug_vsnprintf(char *str, duk_size_t size, const char *format, va_list ap) {
+ duk_fixedbuffer fb;
+ const char *p = format;
+ const char *p_end = p + DUK_STRLEN(format);
+ duk_int_t retval;
+
+ DUK_MEMZERO(&fb, sizeof(fb));
+ fb.buffer = (duk_uint8_t *) str;
+ fb.length = size;
+ fb.offset = 0;
+ fb.truncated = 0;
+
+ while (p < p_end) {
+ char ch = *p++;
+ const char *p_begfmt = NULL;
+ duk_bool_t got_exclamation = 0;
+ duk_bool_t got_long = 0; /* %lf, %ld etc */
+ duk__dprint_state st;
+
+ if (ch != DUK_ASC_PERCENT) {
+ duk_fb_put_byte(&fb, (duk_uint8_t) ch);
+ continue;
+ }
+
+ /*
+ * Format tag parsing. Since we don't understand all the
+ * possible format tags allowed, we just scan for a terminating
+ * specifier and keep track of relevant modifiers that we do
+ * understand. See man 3 printf.
+ */
+
+ DUK_MEMZERO(&st, sizeof(st));
+ st.fb = &fb;
+ st.depth = 0;
+ st.depth_limit = 1;
+ st.loop_stack_index = 0;
+ st.loop_stack_limit = DUK__LOOP_STACK_DEPTH;
+
+ p_begfmt = p - 1;
+ while (p < p_end) {
+ ch = *p++;
+
+ if (ch == DUK_ASC_STAR) {
+ /* unsupported: would consume multiple args */
+ goto error;
+ } else if (ch == DUK_ASC_PERCENT) {
+ duk_fb_put_byte(&fb, (duk_uint8_t) DUK_ASC_PERCENT);
+ break;
+ } else if (ch == DUK_ASC_EXCLAMATION) {
+ got_exclamation = 1;
+ } else if (!got_exclamation && ch == DUK_ASC_LC_L) {
+ got_long = 1;
+ } else if (got_exclamation && ch == DUK_ASC_LC_D) {
+ st.depth_limit = DUK__DEEP_DEPTH_LIMIT;
+ } else if (got_exclamation && ch == DUK_ASC_LC_P) {
+ st.follow_proto = 1;
+ } else if (got_exclamation && ch == DUK_ASC_LC_I) {
+ st.internal = 1;
+ } else if (got_exclamation && ch == DUK_ASC_LC_X) {
+ st.hexdump = 1;
+ } else if (got_exclamation && ch == DUK_ASC_LC_H) {
+ st.heavy = 1;
+ } else if (got_exclamation && ch == DUK_ASC_ATSIGN) {
+ st.pointer = 1;
+ } else if (got_exclamation && ch == DUK_ASC_HASH) {
+ st.binary = 1;
+ } else if (got_exclamation && ch == DUK_ASC_UC_T) {
+ duk_tval *t = va_arg(ap, duk_tval *);
+ if (st.pointer && !st.heavy) {
+ duk_fb_sprintf(&fb, "(%p)", (void *) t);
+ }
+ duk__print_tval(&st, t);
+ break;
+ } else if (got_exclamation && ch == DUK_ASC_UC_O) {
+ duk_heaphdr *t = va_arg(ap, duk_heaphdr *);
+ if (st.pointer && !st.heavy) {
+ duk_fb_sprintf(&fb, "(%p)", (void *) t);
+ }
+ duk__print_heaphdr(&st, t);
+ break;
+ } else if (got_exclamation && ch == DUK_ASC_UC_I) {
+ duk_instr_t t = va_arg(ap, duk_instr_t);
+ duk__print_instr(&st, t);
+ break;
+ } else if (got_exclamation && ch == DUK_ASC_UC_C) {
+ long t = va_arg(ap, long);
+ duk__print_opcode(&st, (duk_small_int_t) t);
+ break;
+ } else if (!got_exclamation && strchr(DUK__ALLOWED_STANDARD_SPECIFIERS, (int) ch)) {
+ char fmtbuf[DUK__MAX_FORMAT_TAG_LENGTH];
+ duk_size_t fmtlen;
+
+ DUK_ASSERT(p >= p_begfmt);
+ fmtlen = (duk_size_t) (p - p_begfmt);
+ if (fmtlen >= sizeof(fmtbuf)) {
+ /* format is too large, abort */
+ goto error;
+ }
+ DUK_MEMZERO(fmtbuf, sizeof(fmtbuf));
+ DUK_MEMCPY(fmtbuf, p_begfmt, fmtlen);
+
+ /* assume exactly 1 arg, which is why '*' is forbidden; arg size still
+ * depends on type though.
+ */
+
+ if (ch == DUK_ASC_LC_F || ch == DUK_ASC_LC_G || ch == DUK_ASC_LC_E) {
+ /* %f and %lf both consume a 'long' */
+ double arg = va_arg(ap, double);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else if (ch == DUK_ASC_LC_D && got_long) {
+ /* %ld */
+ long arg = va_arg(ap, long);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else if (ch == DUK_ASC_LC_D) {
+ /* %d; only 16 bits are guaranteed */
+ int arg = va_arg(ap, int);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else if (ch == DUK_ASC_LC_U && got_long) {
+ /* %lu */
+ unsigned long arg = va_arg(ap, unsigned long);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else if (ch == DUK_ASC_LC_U) {
+ /* %u; only 16 bits are guaranteed */
+ unsigned int arg = va_arg(ap, unsigned int);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else if (ch == DUK_ASC_LC_X && got_long) {
+ /* %lx */
+ unsigned long arg = va_arg(ap, unsigned long);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else if (ch == DUK_ASC_LC_X) {
+ /* %x; only 16 bits are guaranteed */
+ unsigned int arg = va_arg(ap, unsigned int);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else if (ch == DUK_ASC_LC_S) {
+ /* %s */
+ const char *arg = va_arg(ap, const char *);
+ if (arg == NULL) {
+ /* '%s' and NULL is not portable, so special case
+ * it for debug printing.
+ */
+ duk_fb_sprintf(&fb, "NULL");
+ } else {
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ }
+ } else if (ch == DUK_ASC_LC_P) {
+ /* %p */
+ void *arg = va_arg(ap, void *);
+ if (arg == NULL) {
+ /* '%p' and NULL is portable, but special case it
+ * anyway to get a standard NULL marker in logs.
+ */
+ duk_fb_sprintf(&fb, "NULL");
+ } else {
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ }
+ } else if (ch == DUK_ASC_LC_C) {
+ /* '%c', passed concretely as int */
+ int arg = va_arg(ap, int);
+ duk_fb_sprintf(&fb, fmtbuf, arg);
+ } else {
+ /* Should not happen. */
+ duk_fb_sprintf(&fb, "INVALID-FORMAT(%s)", (const char *) fmtbuf);
+ }
+ break;
+ } else {
+ /* ignore */
+ }
+ }
+ }
+ goto done;
+
+ error:
+ duk_fb_put_cstring(&fb, "FMTERR");
+ /* fall through */
+
+ done:
+ retval = (duk_int_t) fb.offset;
+ duk_fb_put_byte(&fb, (duk_uint8_t) 0);
+
+ /* return total chars written excluding terminator */
+ return retval;
+}
+
+#if 0 /*unused*/
+DUK_INTERNAL duk_int_t duk_debug_snprintf(char *str, duk_size_t size, const char *format, ...) {
+ duk_int_t retval;
+ va_list ap;
+ va_start(ap, format);
+ retval = duk_debug_vsnprintf(str, size, format, ap);
+ va_end(ap);
+ return retval;
+}
+#endif
+
+/* Formatting function pointers is tricky: there is no standard pointer for
+ * function pointers and the size of a function pointer may depend on the
+ * specific pointer type. This helper formats a function pointer based on
+ * its memory layout to get something useful on most platforms.
+ */
+DUK_INTERNAL void duk_debug_format_funcptr(char *buf, duk_size_t buf_size, duk_uint8_t *fptr, duk_size_t fptr_size) {
+ duk_size_t i;
+ duk_uint8_t *p = (duk_uint8_t *) buf;
+ duk_uint8_t *p_end = (duk_uint8_t *) (buf + buf_size - 1);
+
+ DUK_MEMZERO(buf, buf_size);
+
+ for (i = 0; i < fptr_size; i++) {
+ duk_int_t left = (duk_int_t) (p_end - p);
+ duk_uint8_t ch;
+ if (left <= 0) {
+ break;
+ }
+
+ /* Quite approximate but should be useful for little and big endian. */
+#ifdef DUK_USE_INTEGER_BE
+ ch = fptr[i];
+#else
+ ch = fptr[fptr_size - 1 - i];
+#endif
+ p += DUK_SNPRINTF((char *) p, left, "%02lx", (unsigned long) ch);
+ }
+}
+
+#endif /* DUK_USE_DEBUG */
projects / ceph.git / blobdiff