JS_GetTraceThingInfo(char *buf, size_t bufsize, JSTracer *trc, void *thing,
JSGCTraceKind kind, bool details)
{
const char *name = nullptr; /* silence uninitialized warning */
size_t n;
if (bufsize == 0)
return;
switch (kind) {
case JSTRACE_OBJECT:
{
name = static_cast<JSObject *>(thing)->getClass()->name;
break;
}
case JSTRACE_STRING:
name = ((JSString *)thing)->isDependent()
? "substring"
: "string";
break;
case JSTRACE_SCRIPT:
name = "script";
break;
case JSTRACE_LAZY_SCRIPT:
name = "lazyscript";
break;
case JSTRACE_JITCODE:
name = "jitcode";
break;
case JSTRACE_SHAPE:
name = "shape";
break;
case JSTRACE_BASE_SHAPE:
name = "base_shape";
break;
case JSTRACE_TYPE_OBJECT:
name = "type_object";
break;
}
n = strlen(name);
if (n > bufsize - 1)
n = bufsize - 1;
js_memcpy(buf, name, n + 1);
buf += n;
bufsize -= n;
*buf = '\0';
if (details && bufsize > 2) {
switch (kind) {
case JSTRACE_OBJECT:
{
JSObject *obj = (JSObject *)thing;
if (obj->is<JSFunction>()) {
JSFunction *fun = &obj->as<JSFunction>();
if (fun->displayAtom()) {
*buf++ = ' ';
bufsize--;
PutEscapedString(buf, bufsize, fun->displayAtom(), 0);
}
} else if (obj->getClass()->flags & JSCLASS_HAS_PRIVATE) {
JS_snprintf(buf, bufsize, " %p", obj->getPrivate());
} else {
JS_snprintf(buf, bufsize, " <no private>");
}
break;
}
case JSTRACE_STRING:
{
*buf++ = ' ';
bufsize--;
JSString *str = (JSString *)thing;
if (str->isLinear()) {
bool willFit = str->length() + strlen("<length > ") +
CountDecimalDigits(str->length()) < bufsize;
n = JS_snprintf(buf, bufsize, "<length %d%s> ",
(int)str->length(),
willFit ? "" : " (truncated)");
buf += n;
bufsize -= n;
PutEscapedString(buf, bufsize, &str->asLinear(), 0);
}
else
JS_snprintf(buf, bufsize, "<rope: length %d>", (int)str->length());
break;
}
case JSTRACE_SCRIPT:
{
JSScript *script = static_cast<JSScript *>(thing);
JS_snprintf(buf, bufsize, " %s:%u", script->filename(), unsigned(script->lineno()));
break;
}
case JSTRACE_LAZY_SCRIPT:
case JSTRACE_JITCODE:
case JSTRACE_SHAPE:
case JSTRACE_BASE_SHAPE:
case JSTRACE_TYPE_OBJECT:
break;
}
}
buf[bufsize - 1] = '\0';
}
JS_GetTraceThingInfo(char* buf, size_t bufsize, JSTracer* trc, void* thing,
JS::TraceKind kind, bool details)
{
const char* name = nullptr; /* silence uninitialized warning */
size_t n;
if (bufsize == 0)
return;
switch (kind) {
case JS::TraceKind::Object:
{
name = static_cast<JSObject*>(thing)->getClass()->name;
break;
}
case JS::TraceKind::Script:
name = "script";
break;
case JS::TraceKind::String:
name = ((JSString*)thing)->isDependent()
? "substring"
: "string";
break;
case JS::TraceKind::Symbol:
name = "symbol";
break;
case JS::TraceKind::BaseShape:
name = "base_shape";
break;
case JS::TraceKind::JitCode:
name = "jitcode";
break;
case JS::TraceKind::LazyScript:
name = "lazyscript";
break;
case JS::TraceKind::Shape:
name = "shape";
break;
case JS::TraceKind::ObjectGroup:
name = "object_group";
break;
default:
name = "INVALID";
break;
}
n = strlen(name);
if (n > bufsize - 1)
n = bufsize - 1;
js_memcpy(buf, name, n + 1);
buf += n;
bufsize -= n;
*buf = '\0';
if (details && bufsize > 2) {
switch (kind) {
case JS::TraceKind::Object:
{
JSObject* obj = (JSObject*)thing;
if (obj->is<JSFunction>()) {
JSFunction* fun = &obj->as<JSFunction>();
if (fun->displayAtom()) {
*buf++ = ' ';
bufsize--;
PutEscapedString(buf, bufsize, fun->displayAtom(), 0);
}
} else if (obj->getClass()->flags & JSCLASS_HAS_PRIVATE) {
JS_snprintf(buf, bufsize, " %p", obj->as<NativeObject>().getPrivate());
} else {
JS_snprintf(buf, bufsize, " <no private>");
}
break;
}
case JS::TraceKind::Script:
{
JSScript* script = static_cast<JSScript*>(thing);
JS_snprintf(buf, bufsize, " %s:%" PRIuSIZE, script->filename(), script->lineno());
break;
}
case JS::TraceKind::String:
{
*buf++ = ' ';
bufsize--;
JSString* str = (JSString*)thing;
if (str->isLinear()) {
bool willFit = str->length() + strlen("<length > ") +
CountDecimalDigits(str->length()) < bufsize;
n = JS_snprintf(buf, bufsize, "<length %d%s> ",
(int)str->length(),
willFit ? "" : " (truncated)");
buf += n;
bufsize -= n;
PutEscapedString(buf, bufsize, &str->asLinear(), 0);
} else {
JS_snprintf(buf, bufsize, "<rope: length %d>", (int)str->length());
}
break;
}
case JS::TraceKind::Symbol:
{
JS::Symbol* sym = static_cast<JS::Symbol*>(thing);
if (JSString* desc = sym->description()) {
if (desc->isLinear()) {
*buf++ = ' ';
bufsize--;
PutEscapedString(buf, bufsize, &desc->asLinear(), 0);
} else {
JS_snprintf(buf, bufsize, "<nonlinear desc>");
}
} else {
JS_snprintf(buf, bufsize, "<null>");
}
break;
}
default:
break;
}
}
buf[bufsize - 1] = '\0';
}
JS_PUBLIC_API void JS_GetTraceThingInfo(char* buf, size_t bufsize,
JSTracer* trc, void* thing,
JS::TraceKind kind, bool details) {
const char* name = nullptr; /* silence uninitialized warning */
size_t n;
if (bufsize == 0) {
return;
}
switch (kind) {
case JS::TraceKind::BaseShape:
name = "base_shape";
break;
case JS::TraceKind::JitCode:
name = "jitcode";
break;
case JS::TraceKind::LazyScript:
name = "lazyscript";
break;
case JS::TraceKind::Null:
name = "null_pointer";
break;
case JS::TraceKind::Object: {
name = static_cast<JSObject*>(thing)->getClass()->name;
break;
}
case JS::TraceKind::ObjectGroup:
name = "object_group";
break;
case JS::TraceKind::RegExpShared:
name = "reg_exp_shared";
break;
case JS::TraceKind::Scope:
name = "scope";
break;
case JS::TraceKind::Script:
name = "script";
break;
case JS::TraceKind::Shape:
name = "shape";
break;
case JS::TraceKind::String:
name = ((JSString*)thing)->isDependent() ? "substring" : "string";
break;
case JS::TraceKind::Symbol:
name = "symbol";
break;
#ifdef ENABLE_BIGINT
case JS::TraceKind::BigInt:
name = "BigInt";
break;
#endif
default:
name = "INVALID";
break;
}
n = strlen(name);
if (n > bufsize - 1) {
n = bufsize - 1;
}
js_memcpy(buf, name, n + 1);
buf += n;
bufsize -= n;
*buf = '\0';
if (details && bufsize > 2) {
switch (kind) {
case JS::TraceKind::Object: {
JSObject* obj = (JSObject*)thing;
if (obj->is<JSFunction>()) {
JSFunction* fun = &obj->as<JSFunction>();
if (fun->displayAtom()) {
*buf++ = ' ';
bufsize--;
PutEscapedString(buf, bufsize, fun->displayAtom(), 0);
}
} else if (obj->getClass()->flags & JSCLASS_HAS_PRIVATE) {
snprintf(buf, bufsize, " %p", obj->as<NativeObject>().getPrivate());
} else {
snprintf(buf, bufsize, " <no private>");
}
break;
}
case JS::TraceKind::Script: {
JSScript* script = static_cast<JSScript*>(thing);
snprintf(buf, bufsize, " %s:%u", script->filename(), script->lineno());
break;
}
case JS::TraceKind::LazyScript: {
LazyScript* script = static_cast<LazyScript*>(thing);
snprintf(buf, bufsize, " %s:%u", script->filename(), script->lineno());
break;
}
case JS::TraceKind::String: {
*buf++ = ' ';
bufsize--;
JSString* str = (JSString*)thing;
if (str->isLinear()) {
const char* header = StringKindHeader(str);
bool willFit = str->length() + strlen("<length > ") + strlen(header) +
CountDecimalDigits(str->length()) <
bufsize;
n = snprintf(buf, bufsize, "<%slength %zu%s> ", header, str->length(),
willFit ? "" : " (truncated)");
buf += n;
bufsize -= n;
PutEscapedString(buf, bufsize, &str->asLinear(), 0);
} else {
snprintf(buf, bufsize, "<rope: length %zu>", str->length());
}
break;
}
case JS::TraceKind::Symbol: {
JS::Symbol* sym = static_cast<JS::Symbol*>(thing);
if (JSString* desc = sym->description()) {
if (desc->isLinear()) {
*buf++ = ' ';
bufsize--;
PutEscapedString(buf, bufsize, &desc->asLinear(), 0);
} else {
snprintf(buf, bufsize, "<nonlinear desc>");
}
} else {
snprintf(buf, bufsize, "<null>");
}
break;
}
case JS::TraceKind::Scope: {
js::Scope* scope = static_cast<js::Scope*>(thing);
snprintf(buf, bufsize, " %s", js::ScopeKindString(scope->kind()));
break;
}
default:
break;
}
}
buf[bufsize - 1] = '\0';
}