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cosmopolitan/third_party/duktape/duk_debug_vsnprintf.c

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/*
* 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
* %!X bytecode instruction opcode name (arg is long)
* %!C catcher (duk_catcher *)
* %!A activation (duk_activation *)
*
* 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 "third_party/duktape/duk_internal.h"
#if defined(DUK_USE_DEBUG)
/* 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 * const duk__bc_optab[256] = {
"LDREG", "STREG", "JUMP", "LDCONST", "LDINT", "LDINTX", "LDTHIS", "LDUNDEF",
"LDNULL", "LDTRUE", "LDFALSE", "GETVAR", "BNOT", "LNOT", "UNM", "UNP",
"EQ_RR", "EQ_CR", "EQ_RC", "EQ_CC", "NEQ_RR", "NEQ_CR", "NEQ_RC", "NEQ_CC",
"SEQ_RR", "SEQ_CR", "SEQ_RC", "SEQ_CC", "SNEQ_RR", "SNEQ_CR", "SNEQ_RC", "SNEQ_CC",
"GT_RR", "GT_CR", "GT_RC", "GT_CC", "GE_RR", "GE_CR", "GE_RC", "GE_CC",
"LT_RR", "LT_CR", "LT_RC", "LT_CC", "LE_RR", "LE_CR", "LE_RC", "LE_CC",
"IFTRUE_R", "IFTRUE_C", "IFFALSE_R", "IFFALSE_C", "ADD_RR", "ADD_CR", "ADD_RC", "ADD_CC",
"SUB_RR", "SUB_CR", "SUB_RC", "SUB_CC", "MUL_RR", "MUL_CR", "MUL_RC", "MUL_CC",
"DIV_RR", "DIV_CR", "DIV_RC", "DIV_CC", "MOD_RR", "MOD_CR", "MOD_RC", "MOD_CC",
"EXP_RR", "EXP_CR", "EXP_RC", "EXP_CC", "BAND_RR", "BAND_CR", "BAND_RC", "BAND_CC",
"BOR_RR", "BOR_CR", "BOR_RC", "BOR_CC", "BXOR_RR", "BXOR_CR", "BXOR_RC", "BXOR_CC",
"BASL_RR", "BASL_CR", "BASL_RC", "BASL_CC", "BLSR_RR", "BLSR_CR", "BLSR_RC", "BLSR_CC",
"BASR_RR", "BASR_CR", "BASR_RC", "BASR_CC", "INSTOF_RR", "INSTOF_CR", "INSTOF_RC", "INSTOF_CC",
"IN_RR", "IN_CR", "IN_RC", "IN_CC", "GETPROP_RR", "GETPROP_CR", "GETPROP_RC", "GETPROP_CC",
"PUTPROP_RR", "PUTPROP_CR", "PUTPROP_RC", "PUTPROP_CC", "DELPROP_RR", "DELPROP_CR", "DELPROP_RC", "DELPROP_CC",
"PREINCR", "PREDECR", "POSTINCR", "POSTDECR", "PREINCV", "PREDECV", "POSTINCV", "POSTDECV",
"PREINCP_RR", "PREINCP_CR", "PREINCP_RC", "PREINCP_CC", "PREDECP_RR", "PREDECP_CR", "PREDECP_RC", "PREDECP_CC",
"POSTINCP_RR", "POSTINCP_CR", "POSTINCP_RC", "POSTINCP_CC", "POSTDECP_RR", "POSTDECP_CR", "POSTDECP_RC", "POSTDECP_CC",
"DECLVAR_RR", "DECLVAR_CR", "DECLVAR_RC", "DECLVAR_CC", "REGEXP_RR", "REGEXP_RC", "REGEXP_CR", "REGEXP_CC",
"CLOSURE", "TYPEOF", "TYPEOFID", "PUTVAR", "DELVAR", "RETREG", "RETUNDEF", "RETCONST",
"RETCONSTN", "LABEL", "ENDLABEL", "BREAK", "CONTINUE", "TRYCATCH", "ENDTRY", "ENDCATCH",
"ENDFIN", "THROW", "INVLHS", "CSREG", "CSVAR_RR", "CSVAR_CR", "CSVAR_RC", "CSVAR_CC",
"CALL0", "CALL1", "CALL2", "CALL3", "CALL4", "CALL5", "CALL6", "CALL7",
"CALL8", "CALL9", "CALL10", "CALL11", "CALL12", "CALL13", "CALL14", "CALL15",
"NEWOBJ", "NEWARR", "MPUTOBJ", "MPUTOBJI", "INITSET", "INITGET", "MPUTARR", "MPUTARRI",
"SETALEN", "INITENUM", "NEXTENUM", "NEWTARGET", "DEBUGGER", "NOP", "INVALID", "UNUSED207",
"GETPROPC_RR", "GETPROPC_CR", "GETPROPC_RC", "GETPROPC_CC", "UNUSED212", "UNUSED213", "UNUSED214", "UNUSED215",
"UNUSED216", "UNUSED217", "UNUSED218", "UNUSED219", "UNUSED220", "UNUSED221", "UNUSED222", "UNUSED223",
"UNUSED224", "UNUSED225", "UNUSED226", "UNUSED227", "UNUSED228", "UNUSED229", "UNUSED230", "UNUSED231",
"UNUSED232", "UNUSED233", "UNUSED234", "UNUSED235", "UNUSED236", "UNUSED237", "UNUSED238", "UNUSED239",
"UNUSED240", "UNUSED241", "UNUSED242", "UNUSED243", "UNUSED244", "UNUSED245", "UNUSED246", "UNUSED247",
"UNUSED248", "UNUSED249", "UNUSED250", "UNUSED251", "UNUSED252", "UNUSED253", "UNUSED254", "UNUSED255"
};
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);
}
#if defined(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);
}
#if defined(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. \x82Bar -> _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 == 0x82 && !quotes) {
/* encode \x82Bar 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);
}
#if defined(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
}
#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) {
const char *subtype = "generic";
if (DUK_HOBJECT_IS_COMPFUNC(h)) {
subtype = "compfunc";
} else if (DUK_HOBJECT_IS_NATFUNC(h)) {
subtype = "natfunc";
} else if (DUK_HOBJECT_IS_THREAD(h)) {
subtype = "thread";
} else if (DUK_HOBJECT_IS_BUFOBJ(h)) {
subtype = "bufobj";
} else if (DUK_HOBJECT_IS_ARRAY(h)) {
subtype = "array";
}
duk_fb_sprintf(fb, "%sobject/%s %p%s", (const char *) brace1, subtype, (void *) h, (const char *) brace2);
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_HAS_HIDDEN(key)) {
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_IS_ARRAY(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__array:true");
}
if (DUK_HOBJECT_HAS_EXTENSIBLE(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__extensible:true");
}
if (DUK_HOBJECT_HAS_CONSTRUCTABLE(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__constructable:true");
}
if (DUK_HOBJECT_HAS_BOUNDFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__boundfunc:true");
}
if (DUK_HOBJECT_HAS_COMPFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__compfunc:true");
}
if (DUK_HOBJECT_HAS_NATFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__natfunc:true");
}
if (DUK_HOBJECT_HAS_BUFOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__bufobj:true");
}
if (DUK_HOBJECT_IS_THREAD(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__thread:true");
}
if (DUK_HOBJECT_HAS_ARRAY_PART(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__array_part:true");
}
if (DUK_HOBJECT_HAS_STRICT(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__strict:true");
}
if (DUK_HOBJECT_HAS_NOTAIL(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__notail:true");
}
if (DUK_HOBJECT_HAS_NEWENV(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__newenv:true");
}
if (DUK_HOBJECT_HAS_NAMEBINDING(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__namebinding:true");
}
if (DUK_HOBJECT_HAS_CREATEARGS(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__createargs:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_array:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_stringobj:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_arguments:true");
}
if (DUK_HOBJECT_IS_BUFOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_bufobj:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_proxyobj:true");
}
}
if (st->internal && DUK_HOBJECT_IS_ARRAY(h)) {
duk_harray *a = (duk_harray *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__length:%ld", (long) a->length);
DUK__COMMA(); duk_fb_sprintf(fb, "__length_nonwritable:%ld", (long) a->length_nonwritable);
} else if (st->internal && DUK_HOBJECT_IS_COMPFUNC(h)) {
duk_hcompfunc *f = (duk_hcompfunc *) h;
DUK__COMMA(); duk_fb_put_cstring(fb, "__data:");
duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(NULL, f));
DUK__COMMA(); duk_fb_put_cstring(fb, "__lexenv:"); duk__print_hobject(st, DUK_HCOMPFUNC_GET_LEXENV(NULL, f));
DUK__COMMA(); duk_fb_put_cstring(fb, "__varenv:"); duk__print_hobject(st, DUK_HCOMPFUNC_GET_VARENV(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_HCOMPFUNC_GET_DATA(NULL, f));
} else if (st->internal && DUK_HOBJECT_IS_NATFUNC(h)) {
duk_hnatfunc *f = (duk_hnatfunc *) 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_DECENV(h)) {
duk_hdecenv *e = (duk_hdecenv *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__thread:"); duk__print_hobject(st, (duk_hobject *) e->thread);
DUK__COMMA(); duk_fb_sprintf(fb, "__varmap:"); duk__print_hobject(st, (duk_hobject *) e->varmap);
DUK__COMMA(); duk_fb_sprintf(fb, "__regbase_byteoff:%ld", (long) e->regbase_byteoff);
} else if (st->internal && DUK_HOBJECT_IS_OBJENV(h)) {
duk_hobjenv *e = (duk_hobjenv *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__target:"); duk__print_hobject(st, (duk_hobject *) e->target);
DUK__COMMA(); duk_fb_sprintf(fb, "__has_this:%ld", (long) e->has_this);
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
} else if (st->internal && DUK_HOBJECT_IS_BUFOBJ(h)) {
duk_hbufobj *b = (duk_hbufobj *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__buf:");
duk__print_hbuffer(st, (duk_hbuffer *) b->buf);
DUK__COMMA(); duk_fb_sprintf(fb, "__buf_prop:");
duk__print_hobject(st, (duk_hobject *) b->buf_prop);
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);
#endif
} else if (st->internal && DUK_HOBJECT_IS_PROXY(h)) {
duk_hproxy *p = (duk_hproxy *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__target:");
duk__print_hobject(st, p->target);
DUK__COMMA(); duk_fb_sprintf(fb, "__handler:");
duk__print_hobject(st, p->handler);
} else if (st->internal && DUK_HOBJECT_IS_THREAD(h)) {
duk_hthread *t = (duk_hthread *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__ptr_curr_pc:%p", (void *) t->ptr_curr_pc);
DUK__COMMA(); duk_fb_sprintf(fb, "__heap:%p", (void *) t->heap);
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:%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_alloc_end:%p/%ld", (void *) t->valstack_alloc_end, (long) (t->valstack_alloc_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, "__callstack_curr:%p", (void *) t->callstack_curr);
DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_top:%ld", (long) t->callstack_top);
DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_preventcount:%ld", (long) t->callstack_preventcount);
DUK__COMMA(); duk_fb_sprintf(fb, "__resumer:"); duk__print_hobject(st, (duk_hobject *) t->resumer);
DUK__COMMA(); duk_fb_sprintf(fb, "__compile_ctx:%p", (void *) t->compile_ctx);
#if defined(DUK_USE_INTERRUPT_COUNTER)
DUK__COMMA(); duk_fb_sprintf(fb, "__interrupt_counter:%ld", (long) t->interrupt_counter);
DUK__COMMA(); duk_fb_sprintf(fb, "__interrupt_init:%ld", (long) t->interrupt_init);
#endif
/* XXX: print built-ins array? */
}
#if defined(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;
}
}
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));
}
#if defined(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:
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
duk_fb_sprintf(fb, "%.18g_F", (double) DUK_TVAL_GET_NUMBER(tv));
break;
#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;
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_JUMP) {
duk_int_t diff1 = (duk_int_t) (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_LOCAL void duk__print_catcher(duk__dprint_state *st, duk_catcher *cat) {
duk_fixedbuffer *fb = st->fb;
if (duk_fb_is_full(fb)) {
return;
}
if (!cat) {
duk_fb_put_cstring(fb, "NULL");
return;
}
duk_fb_sprintf(fb, "[catcher ptr=%p parent=%p varname=%p pc_base=%p, idx_base=%ld, flags=0x%08lx]",
(void *) cat,
(void *) cat->parent, (void *) cat->h_varname, (void *) cat->pc_base,
(long) cat->idx_base, (unsigned long) cat->flags);
}
DUK_LOCAL void duk__print_activation(duk__dprint_state *st, duk_activation *act) {
duk_fixedbuffer *fb = st->fb;
if (duk_fb_is_full(fb)) {
return;
}
if (!act) {
duk_fb_put_cstring(fb, "NULL");
return;
}
/* prev_caller: conditional, omitted on purpose, it's rarely used. */
/* prev_line: conditional, omitted on purpose (but would be nice). */
duk_fb_sprintf(fb, "[activation ptr=%p tv_func=<omit> func=%p parent=%p var_env=%p lex_env=%p cat=%p curr_pc=%p bottom_byteoff=%ld retval_byteoff=%ld reserve_byteoff=%ld flags=%ld]",
(void *) act,
(void *) act->func, (void *) act->parent, (void *) act->var_env,
(void *) act->lex_env, (void *) act->cat, (void *) act->curr_pc,
(long) act->bottom_byteoff, (long) act->retval_byteoff, (long) act->reserve_byteoff,
(long) act->flags);
}
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 format_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_X) {
long t = va_arg(ap, long);
duk__print_opcode(&st, (duk_small_int_t) t);
break;
} else if (got_exclamation && ch == DUK_ASC_UC_C) {
duk_catcher *t = va_arg(ap, duk_catcher *);
duk__print_catcher(&st, t);
break;
} else if (got_exclamation && ch == DUK_ASC_UC_A) {
duk_activation *t = va_arg(ap, duk_activation *);
duk__print_activation(&st, 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 format_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;
format_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_ASSERT(buf != NULL);
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. */
#if defined(DUK_USE_INTEGER_BE)
ch = fptr[i];
#else
ch = fptr[fptr_size - 1 - i];
#endif
p += DUK_SNPRINTF((char *) p, (duk_size_t) left, "%02lx", (unsigned long) ch);
}
}
#endif /* DUK_USE_DEBUG */
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