2007-02-15 Kyle Galloway <kgallowa@redhat.com>
+
+ * defineclass.cc (_Jv_ClassReader::read_one_code_attribute):
+ Added LocalVariableTable attribute handling.
+ (_Jv_ClassReader::pool_Utf8_to_char_arr): New method.
+ * jvmti.cc (_Jv_JVMTI_GetLocalVariableTable): New method.
+ * include/java-interp.h: Added local_var_table and
+ local_var_table_len fields to _Jv_InterpMethod.
+ (_Jv_InterpMethod::get_local_var_table): New method.
+ * testsuite/libjava.jvmti/interp/getlocalvartable.java: New
+ test.
+ * testsuite/libjava.jvmti/interp/getlocalvartable.jar: New test.
+ * testsuite/libjava.jvmti/interp/getlocalvartable.out: Output
+ for new test.
+ * testsuite/libjava.jvmti/interp/getlocalvartable.h: New test.
+ * testsuite/libjava.jvmti/interp/natgetlocalvartable.cc: New
+ test.
+
+2007-02-15 Kyle Galloway <kgallowa@redhat.com>
* gnu/classpath/jdwp/natVMVirtualMachine (getFrames): Implement.
/** check an utf8 entry, without creating a Utf8Const object */
bool is_attribute_name (int index, const char *name);
+
+ /** return the value of a utf8 entry in the passed array */
+ int pool_Utf8_to_char_arr (int index, char **entry);
/** here goes the class-loader members defined out-of-line */
void handleConstantPool ();
return !memcmp (bytes+offsets[index]+2, name, len);
}
+// Get a UTF8 value from the constant pool and turn it into a garbage
+// collected char array.
+int _Jv_ClassReader::pool_Utf8_to_char_arr (int index, char** entry)
+{
+ check_tag (index, JV_CONSTANT_Utf8);
+ int len = get2u (bytes + offsets[index]);
+ *entry = reinterpret_cast<char *> (_Jv_AllocBytes (len + 1));
+ (*entry)[len] = '\0';
+ memcpy (*entry, bytes + offsets[index] + 2, len);
+ return len + 1;
+}
+
void _Jv_ClassReader::read_one_field_attribute (int field_index,
bool *found_value)
{
method->line_table_len = table_len;
method->line_table = table;
}
+ else if (is_attribute_name (name, "LocalVariableTable"))
+ {
+ _Jv_InterpMethod *method = reinterpret_cast<_Jv_InterpMethod *>
+ (def_interp->interpreted_methods[method_index]);
+ if (method->local_var_table != NULL)
+ throw_class_format_error ("Method already has LocalVariableTable");
+
+ int table_len = read2u ();
+ _Jv_LocalVarTableEntry *table
+ = reinterpret_cast<_Jv_LocalVarTableEntry *>
+ (_Jv_AllocRawObj (table_len * sizeof (_Jv_LocalVarTableEntry)));
+
+ for (int i = 0; i < table_len; i++)
+ {
+ table[i].bytecode_start_pc = read2u ();
+ table[i].length = read2u ();
+ int len;
+ len = pool_Utf8_to_char_arr (read2u (), &table[i].name);
+ len = pool_Utf8_to_char_arr (read2u (), &table[i].descriptor);
+ table[i].slot = read2u ();
+
+ if (table[i].slot > method->max_locals || table[i].slot < 0)
+ throw_class_format_error ("Malformed Local Variable Table: Invalid Slot");
+ }
+
+ method->local_var_table_len = table_len;
+ method->local_var_table = table;
+ }
else
{
/* ignore unknown code attributes */
int line;
};
+// This structure holds local variable information.
+// The pc value is the first pc where the variable must have a value and it
+// must continue to have a value until (start_pc + length).
+// The name is the variable name, and the descriptor contains type information.
+// The slot is the index in the local variable array of this method, long and
+// double occupy slot and slot+1.
+struct _Jv_LocalVarTableEntry
+{
+ int bytecode_start_pc;
+ int length;
+ char *name;
+ char *descriptor;
+ int slot;
+};
+
class _Jv_InterpMethod : public _Jv_MethodBase
{
// Breakpoint instruction
// Length of the line_table - when this is zero then line_table is NULL.
int line_table_len;
_Jv_LineTableEntry *line_table;
+
+ // The local variable table length and the table itself
+ int local_var_table_len;
+ _Jv_LocalVarTableEntry *local_var_table;
pc_t prepared;
int number_insn_slots;
{
return static_cast<int> (max_locals);
}
+
+ /* Get info for a local variable of this method.
+ * If there is no loca_var_table for this method it will return -1.
+ * table_slot indicates which slot in the local_var_table to get, if there is
+ * no variable at this location it will return 0.
+ * Otherwise, it will return the number of table slots after the selected
+ * slot, indexed from 0.
+ *
+ * Example: there are 5 slots in the table, you request slot 0 so it will
+ * return 4.
+ */
+ int get_local_var_table (char **name, char **sig, char **generic_sig,
+ jlong *startloc, jint *length, jint *slot,
+ int table_slot);
/* Installs a break instruction at the given code index. Returns
the pc_t of the breakpoint or NULL if index is invalid. */
#endif // !DIRECT_THREADED
}
+int
+_Jv_InterpMethod::get_local_var_table (char **name, char **sig,
+ char **generic_sig, jlong *startloc,
+ jint *length, jint *slot,
+ int table_slot)
+{
+ if (local_var_table == NULL)
+ return -2;
+ if (table_slot >= local_var_table_len)
+ return -1;
+ else
+ {
+ *name = local_var_table[table_slot].name;
+ *sig = local_var_table[table_slot].descriptor;
+ *generic_sig = local_var_table[table_slot].descriptor;
+
+ *startloc = static_cast<jlong>
+ (local_var_table[table_slot].bytecode_start_pc);
+ *length = static_cast<jint> (local_var_table[table_slot].length);
+ *slot = static_cast<jint> (local_var_table[table_slot].slot);
+ }
+ return local_var_table_len - table_slot -1;
+}
+
pc_t
_Jv_InterpMethod::install_break (jlong index)
{
}
static jvmtiError JNICALL
+_Jv_JVMTI_GetLocalVariableTable (MAYBE_UNUSED jvmtiEnv *env, jmethodID method,
+ jint *num_locals,
+ jvmtiLocalVariableEntry **locals)
+{
+ REQUIRE_PHASE (env, JVMTI_PHASE_LIVE);
+ NULL_CHECK (num_locals);
+ NULL_CHECK (locals);
+
+ CHECK_FOR_NATIVE_METHOD(method);
+
+ jclass klass;
+ jvmtiError jerr = env->GetMethodDeclaringClass (method, &klass);
+ if (jerr != JVMTI_ERROR_NONE)
+ return jerr;
+
+ _Jv_InterpMethod *imeth = reinterpret_cast<_Jv_InterpMethod *>
+ (_Jv_FindInterpreterMethod (klass, method));
+
+ if (imeth == NULL)
+ return JVMTI_ERROR_INVALID_METHODID;
+
+ jerr = env->GetMaxLocals (method, num_locals);
+ if (jerr != JVMTI_ERROR_NONE)
+ return jerr;
+
+ jerr = env->Allocate (static_cast<jlong>
+ ((*num_locals) * sizeof (jvmtiLocalVariableEntry)),
+ reinterpret_cast<unsigned char **> (locals));
+
+ if (jerr != JVMTI_ERROR_NONE)
+ return jerr;
+
+ //the slot in the methods local_var_table to get
+ int table_slot = 0;
+ char *name;
+ char *sig;
+ char *generic_sig;
+
+ while (table_slot < *num_locals
+ && imeth->get_local_var_table (&name, &sig, &generic_sig,
+ &((((*locals)[table_slot].start_location))),
+ &((*locals)[table_slot].length),
+ &((*locals)[table_slot].slot),
+ table_slot)
+ >= 0)
+ {
+ jerr = env->Allocate (static_cast<jlong> (strlen (name) + 1),
+ reinterpret_cast<unsigned char **>
+ (&(*locals)[table_slot].name));
+ if (jerr != JVMTI_ERROR_NONE)
+ return jerr;
+ strcpy ((*locals)[table_slot].name, name);
+
+ jerr = env->Allocate (static_cast<jlong> (strlen (name) + 1),
+ reinterpret_cast<unsigned char **>
+ (&(*locals)[table_slot].signature));
+ if (jerr != JVMTI_ERROR_NONE)
+ return jerr;
+ strcpy ((*locals)[table_slot].signature, sig);
+
+ jerr = env->Allocate (static_cast<jlong> (strlen (name) + 1),
+ reinterpret_cast<unsigned char **>
+ (&(*locals)[table_slot].generic_signature));
+ if (jerr != JVMTI_ERROR_NONE)
+ return jerr;
+ strcpy ((*locals)[table_slot].generic_signature, generic_sig);
+
+ table_slot++;
+ }
+
+ if (table_slot == 0)
+ return JVMTI_ERROR_ABSENT_INFORMATION;
+
+ // If there are double or long variables in the table, the the table will be
+ // smaller than the max number of slots, so correct for this here.
+ if ((table_slot) < *num_locals)
+ *num_locals = table_slot;
+
+ return JVMTI_ERROR_NONE;
+}
+
+static jvmtiError JNICALL
_Jv_JVMTI_IsMethodNative (MAYBE_UNUSED jvmtiEnv *env, jmethodID method,
jboolean *result)
{
}
static jvmtiError JNICALL
-_Jv_JVMTI_GetMaxLocals (MAYBE_UNUSED jvmtiEnv *env, jmethodID method,
- jint *max_locals)
+_Jv_JVMTI_GetMaxLocals (jvmtiEnv *env, jmethodID method, jint *max_locals)
{
REQUIRE_PHASE (env, JVMTI_PHASE_START | JVMTI_PHASE_LIVE);
NULL_CHECK (max_locals);
UNIMPLEMENTED, // GetArgumentsSize
_Jv_JVMTI_GetLineNumberTable, // GetLineNumberTable
UNIMPLEMENTED, // GetMethodLocation
- UNIMPLEMENTED, // GetLocalVariableTable
+ _Jv_JVMTI_GetLocalVariableTable, // GetLocalVariableTable
RESERVED, // reserved73
RESERVED, // reserved74
UNIMPLEMENTED, // GetBytecodes
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