add simple disassembler for debugging

This commit is contained in:
Joshua Warner 2012-05-22 13:53:32 -06:00
parent 8bc8a818e4
commit d2e1d62756

View File

@ -20,6 +20,8 @@ using namespace vm;
namespace {
const bool DebugClassReader = false;
const unsigned NoByte = 0xFFFF;
#ifdef USE_ATOMIC_OPERATIONS
@ -813,13 +815,22 @@ parsePoolEntry(Thread* t, Stream& s, uint32_t* index, object pool, unsigned i)
switch (s.read1()) {
case CONSTANT_Integer:
case CONSTANT_Float: {
singletonValue(t, pool, i) = s.read4();
uint32_t v = s.read4();
singletonValue(t, pool, i) = v;
if(DebugClassReader) {
fprintf(stderr, " consts[%d] = int/float 0x%x\n", i, v);
}
} return 1;
case CONSTANT_Long:
case CONSTANT_Double: {
uint64_t v = s.read8();
memcpy(&singletonValue(t, pool, i), &v, 8);
if(DebugClassReader) {
fprintf(stderr, " consts[%d] = long/double <todo>\n", i);
}
} return 2;
case CONSTANT_Utf8: {
@ -829,6 +840,10 @@ parsePoolEntry(Thread* t, Stream& s, uint32_t* index, object pool, unsigned i)
value = internByteArray(t, value);
}
set(t, pool, SingletonBody + (i * BytesPerWord), value);
if(DebugClassReader) {
fprintf(stderr, " consts[%d] = utf8 %s\n", i, &byteArrayBody(t, value, 0));
}
}
} return 1;
@ -839,6 +854,10 @@ parsePoolEntry(Thread* t, Stream& s, uint32_t* index, object pool, unsigned i)
object value = makeReference(t, 0, singletonObject(t, pool, si), 0);
set(t, pool, SingletonBody + (i * BytesPerWord), value);
if(DebugClassReader) {
fprintf(stderr, " consts[%d] = class <todo>\n", i);
}
}
} return 1;
@ -852,6 +871,10 @@ parsePoolEntry(Thread* t, Stream& s, uint32_t* index, object pool, unsigned i)
(t, value, 0, cast<uintptr_t>(value, BytesPerWord) - 1);
value = intern(t, value);
set(t, pool, SingletonBody + (i * BytesPerWord), value);
if(DebugClassReader) {
fprintf(stderr, " consts[%d] = string <todo>\n", i);
}
}
} return 1;
@ -867,6 +890,10 @@ parsePoolEntry(Thread* t, Stream& s, uint32_t* index, object pool, unsigned i)
object type = singletonObject(t, pool, ti);
object value = makePair(t, name, type);
set(t, pool, SingletonBody + (i * BytesPerWord), value);
if(DebugClassReader) {
fprintf(stderr, " consts[%d] = nameAndType %s%s\n", i, &byteArrayBody(t, name, 0), &byteArrayBody(t, type, 0));
}
}
} return 1;
@ -886,6 +913,10 @@ parsePoolEntry(Thread* t, Stream& s, uint32_t* index, object pool, unsigned i)
object value = makeReference
(t, class_, pairFirst(t, nameAndType), pairSecond(t, nameAndType));
set(t, pool, SingletonBody + (i * BytesPerWord), value);
if(DebugClassReader) {
fprintf(stderr, " consts[%d] = method %s.%s%s\n", i, &byteArrayBody(t, class_, 0), &byteArrayBody(t, pairFirst(t, nameAndType), 0), &byteArrayBody(t, pairSecond(t, nameAndType), 0));
}
}
} return 1;
@ -900,6 +931,10 @@ parsePool(Thread* t, Stream& s)
object pool = makeSingletonOfSize(t, count + poolMaskSize(count));
PROTECT(t, pool);
if(DebugClassReader) {
fprintf(stderr, " const pool entries %d\n", count);
}
if (count) {
uint32_t* index = static_cast<uint32_t*>(t->m->heap->allocate(count * 4));
@ -1301,6 +1336,381 @@ parseFieldTable(Thread* t, Stream& s, object class_, object pool)
}
}
uint16_t read16(uint8_t* code, unsigned& ip) {
uint16_t a = code[ip++];
uint16_t b = code[ip++];
return (a << 8) | b;
}
uint32_t read32(uint8_t* code, unsigned& ip) {
uint32_t b = code[ip++];
uint32_t a = code[ip++];
uint32_t c = code[ip++];
uint32_t d = code[ip++];
return (a << 24) | (b << 16) | (c << 8) | d;
}
void
disassembleCode(const char* prefix, uint8_t* code, unsigned length)
{
unsigned ip = 0;
while(ip < length) {
unsigned instr;
fprintf(stderr, "%s%x:\t", prefix, ip);
switch (instr = code[ip++]) {
case aaload: fprintf(stderr, "aaload\n"); break;
case aastore: fprintf(stderr, "aastore\n"); break;
case aconst_null: fprintf(stderr, "aconst_null\n"); break;
case aload: fprintf(stderr, "aload %02x\n", code[ip++]); break;
case aload_0: fprintf(stderr, "aload_0\n"); break;
case aload_1: fprintf(stderr, "aload_1\n"); break;
case aload_2: fprintf(stderr, "aload_2\n"); break;
case aload_3: fprintf(stderr, "aload_3\n"); break;
case anewarray: fprintf(stderr, "anewarray %04x\n", read16(code, ip)); break;
case areturn: fprintf(stderr, "areturn\n"); break;
case arraylength: fprintf(stderr, "arraylength\n"); break;
case astore: fprintf(stderr, "astore %02x\n", code[ip++]); break;
case astore_0: fprintf(stderr, "astore_0\n"); break;
case astore_1: fprintf(stderr, "astore_1\n"); break;
case astore_2: fprintf(stderr, "astore_2\n"); break;
case astore_3: fprintf(stderr, "astore_3\n"); break;
case athrow: fprintf(stderr, "athrow\n"); break;
case baload: fprintf(stderr, "baload\n"); break;
case bastore: fprintf(stderr, "bastore\n"); break;
case bipush: fprintf(stderr, "bipush %02x\n", code[ip++]); break;
case caload: fprintf(stderr, "caload\n"); break;
case castore: fprintf(stderr, "castore\n"); break;
case checkcast: fprintf(stderr, "checkcast %04x\n", read16(code, ip)); break;
case d2f: fprintf(stderr, "d2f\n"); break;
case d2i: fprintf(stderr, "d2i\n"); break;
case d2l: fprintf(stderr, "d2l\n"); break;
case dadd: fprintf(stderr, "dadd\n"); break;
case daload: fprintf(stderr, "daload\n"); break;
case dastore: fprintf(stderr, "dastore\n"); break;
case dcmpg: fprintf(stderr, "dcmpg\n"); break;
case dcmpl: fprintf(stderr, "dcmpl\n"); break;
case dconst_0: fprintf(stderr, "dconst_0\n"); break;
case dconst_1: fprintf(stderr, "dconst_1\n"); break;
case ddiv: fprintf(stderr, "ddiv\n"); break;
case dmul: fprintf(stderr, "dmul\n"); break;
case dneg: fprintf(stderr, "dneg\n"); break;
case vm::drem: fprintf(stderr, "drem\n"); break;
case dsub: fprintf(stderr, "dsub\n"); break;
case dup: fprintf(stderr, "dup\n"); break;
case dup_x1: fprintf(stderr, "dup_x1\n"); break;
case dup_x2: fprintf(stderr, "dup_x2\n"); break;
case dup2: fprintf(stderr, "dup2\n"); break;
case dup2_x1: fprintf(stderr, "dup2_x1\n"); break;
case dup2_x2: fprintf(stderr, "dup2_x2\n"); break;
case f2d: fprintf(stderr, "f2d\n"); break;
case f2i: fprintf(stderr, "f2i\n"); break;
case f2l: fprintf(stderr, "f2l\n"); break;
case fadd: fprintf(stderr, "fadd\n"); break;
case faload: fprintf(stderr, "faload\n"); break;
case fastore: fprintf(stderr, "fastore\n"); break;
case fcmpg: fprintf(stderr, "fcmpg\n"); break;
case fcmpl: fprintf(stderr, "fcmpl\n"); break;
case fconst_0: fprintf(stderr, "fconst_0\n"); break;
case fconst_1: fprintf(stderr, "fconst_1\n"); break;
case fconst_2: fprintf(stderr, "fconst_2\n"); break;
case fdiv: fprintf(stderr, "fdiv\n"); break;
case fmul: fprintf(stderr, "fmul\n"); break;
case fneg: fprintf(stderr, "fneg\n"); break;
case frem: fprintf(stderr, "frem\n"); break;
case fsub: fprintf(stderr, "fsub\n"); break;
case getfield: fprintf(stderr, "getfield %04x\n", read16(code, ip)); break;
case getstatic: fprintf(stderr, "getstatic %04x\n", read16(code, ip)); break;
case goto_: {
int16_t offset = read16(code, ip);
fprintf(stderr, "goto %04x\n", offset + ip - 3);
} break;
case goto_w: {
int32_t offset = read32(code, ip);
fprintf(stderr, "goto_w %08x\n", offset + ip - 5);
} break;
case i2b: fprintf(stderr, "i2b\n"); break;
case i2c: fprintf(stderr, "i2c\n"); break;
case i2d: fprintf(stderr, "i2d\n"); break;
case i2f: fprintf(stderr, "i2f\n"); break;
case i2l: fprintf(stderr, "i2l\n"); break;
case i2s: fprintf(stderr, "i2s\n"); break;
case iadd: fprintf(stderr, "iadd\n"); break;
case iaload: fprintf(stderr, "iaload\n"); break;
case iand: fprintf(stderr, "iand\n"); break;
case iastore: fprintf(stderr, "iastore\n"); break;
case iconst_m1: fprintf(stderr, "iconst_m1\n"); break;
case iconst_0: fprintf(stderr, "iconst_0\n"); break;
case iconst_1: fprintf(stderr, "iconst_1\n"); break;
case iconst_2: fprintf(stderr, "iconst_2\n"); break;
case iconst_3: fprintf(stderr, "iconst_3\n"); break;
case iconst_4: fprintf(stderr, "iconst_4\n"); break;
case iconst_5: fprintf(stderr, "iconst_5\n"); break;
case idiv: fprintf(stderr, "idiv\n"); break;
case if_acmpeq: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_acmpeq %04x\n", offset + ip - 3);
} break;
case if_acmpne: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_acmpne %04x\n", offset + ip - 3);
} break;
case if_icmpeq: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_icmpeq %04x\n", offset + ip - 3);
} break;
case if_icmpne: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_icmpne %04x\n", offset + ip - 3);
} break;
case if_icmpgt: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_icmpgt %04x\n", offset + ip - 3);
} break;
case if_icmpge: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_icmpge %04x\n", offset + ip - 3);
} break;
case if_icmplt: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_icmplt %04x\n", offset + ip - 3);
} break;
case if_icmple: {
int16_t offset = read16(code, ip);
fprintf(stderr, "if_icmple %04x\n", offset + ip - 3);
} break;
case ifeq: {
int16_t offset = read16(code, ip);
fprintf(stderr, "ifeq %04x\n", offset + ip - 3);
} break;
case ifne: {
int16_t offset = read16(code, ip);
fprintf(stderr, "ifne %04x\n", offset + ip - 3);
} break;
case ifgt: {
int16_t offset = read16(code, ip);
fprintf(stderr, "ifgt %04x\n", offset + ip - 3);
} break;
case ifge: {
int16_t offset = read16(code, ip);
fprintf(stderr, "ifge %04x\n", offset + ip - 3);
} break;
case iflt: {
int16_t offset = read16(code, ip);
fprintf(stderr, "iflt %04x\n", offset + ip - 3);
} break;
case ifle: {
int16_t offset = read16(code, ip);
fprintf(stderr, "ifle %04x\n", offset + ip - 3);
} break;
case ifnonnull: {
int16_t offset = read16(code, ip);
fprintf(stderr, "ifnonnull %04x\n", offset + ip - 3);
} break;
case ifnull: {
int16_t offset = read16(code, ip);
fprintf(stderr, "ifnull %04x\n", offset + ip - 3);
} break;
case iinc: {
uint8_t a = code[ip++];
uint8_t b = code[ip++];
fprintf(stderr, "iinc %02x %02x\n", a, b);
} break;
case iload: fprintf(stderr, "iload %02x\n", code[ip++]); break;
case fload: fprintf(stderr, "fload %02x\n", code[ip++]); break;
case iload_0: fprintf(stderr, "iload_0\n"); break;
case fload_0: fprintf(stderr, "fload_0\n"); break;
case iload_1: fprintf(stderr, "iload_1\n"); break;
case fload_1: fprintf(stderr, "fload_1\n"); break;
case iload_2: fprintf(stderr, "iload_2\n"); break;
case fload_2: fprintf(stderr, "fload_2\n"); break;
case iload_3: fprintf(stderr, "iload_3\n"); break;
case fload_3: fprintf(stderr, "fload_3\n"); break;
case imul: fprintf(stderr, "imul\n"); break;
case ineg: fprintf(stderr, "ineg\n"); break;
case instanceof: fprintf(stderr, "instanceof %04x\n", read16(code, ip)); break;
case invokeinterface: fprintf(stderr, "invokeinterface %04x\n", read16(code, ip)); break;
case invokespecial: fprintf(stderr, "invokespecial %04x\n", read16(code, ip)); break;
case invokestatic: fprintf(stderr, "invokestatic %04x\n", read16(code, ip)); break;
case invokevirtual: fprintf(stderr, "invokevirtual %04x\n", read16(code, ip)); break;
case ior: fprintf(stderr, "ior\n"); break;
case irem: fprintf(stderr, "irem\n"); break;
case ireturn: fprintf(stderr, "ireturn\n"); break;
case freturn: fprintf(stderr, "freturn\n"); break;
case ishl: fprintf(stderr, "ishl\n"); break;
case ishr: fprintf(stderr, "ishr\n"); break;
case istore: fprintf(stderr, "istore %02x\n", code[ip++]); break;
case fstore: fprintf(stderr, "fstore %02x\n", code[ip++]); break;
case istore_0: fprintf(stderr, "istore_0\n"); break;
case fstore_0: fprintf(stderr, "fstore_0\n"); break;
case istore_1: fprintf(stderr, "istore_1\n"); break;
case fstore_1: fprintf(stderr, "fstore_1\n"); break;
case istore_2: fprintf(stderr, "istore_2\n"); break;
case fstore_2: fprintf(stderr, "fstore_2\n"); break;
case istore_3: fprintf(stderr, "istore_3\n"); break;
case fstore_3: fprintf(stderr, "fstore_3\n"); break;
case isub: fprintf(stderr, "isub\n"); break;
case iushr: fprintf(stderr, "iushr\n"); break;
case ixor: fprintf(stderr, "ixor\n"); break;
case jsr: fprintf(stderr, "jsr %04x\n", read16(code, ip)); break;
case jsr_w: fprintf(stderr, "jsr_w %08x\n", read32(code, ip)); break;
case l2d: fprintf(stderr, "l2d\n"); break;
case l2f: fprintf(stderr, "l2f\n"); break;
case l2i: fprintf(stderr, "l2i\n"); break;
case ladd: fprintf(stderr, "ladd\n"); break;
case laload: fprintf(stderr, "laload\n"); break;
case land: fprintf(stderr, "land\n"); break;
case lastore: fprintf(stderr, "lastore\n"); break;
case lcmp: fprintf(stderr, "lcmp\n"); break;
case lconst_0: fprintf(stderr, "lconst_0\n"); break;
case lconst_1: fprintf(stderr, "lconst_1\n"); break;
case ldc: fprintf(stderr, "ldc %04x\n", read16(code, ip)); break;
case ldc_w: fprintf(stderr, "ldc_w %08x\n", read32(code, ip)); break;
case ldc2_w: fprintf(stderr, "ldc2_w %04x\n", read16(code, ip)); break;
case ldiv_: fprintf(stderr, "ldiv_\n"); break;
case lload: fprintf(stderr, "lload %02x\n", code[ip++]); break;
case dload: fprintf(stderr, "dload %02x\n", code[ip++]); break;
case lload_0: fprintf(stderr, "lload_0\n"); break;
case dload_0: fprintf(stderr, "dload_0\n"); break;
case lload_1: fprintf(stderr, "lload_1\n"); break;
case dload_1: fprintf(stderr, "dload_1\n"); break;
case lload_2: fprintf(stderr, "lload_2\n"); break;
case dload_2: fprintf(stderr, "dload_2\n"); break;
case lload_3: fprintf(stderr, "lload_3\n"); break;
case dload_3: fprintf(stderr, "dload_3\n"); break;
case lmul: fprintf(stderr, "lmul\n"); break;
case lneg: fprintf(stderr, "lneg\n"); break;
case lookupswitch: {
int32_t default_ = read32(code, ip);
int32_t pairCount = read32(code, ip);
fprintf(stderr, "lookupswitch default: %d pairCount: %d\n", default_, pairCount);
for (int i = 0; i < pairCount; i++) {
int32_t k = read32(code, ip);
int32_t d = read32(code, ip);
fprintf(stderr, "%s key: %02x dest: %2x\n", prefix, k, d);
}
} break;
case lor: fprintf(stderr, "lor\n"); break;
case lrem: fprintf(stderr, "lrem\n"); break;
case lreturn: fprintf(stderr, "lreturn\n"); break;
case dreturn: fprintf(stderr, "dreturn\n"); break;
case lshl: fprintf(stderr, "lshl\n"); break;
case lshr: fprintf(stderr, "lshr\n"); break;
case lstore: fprintf(stderr, "lstore %02x\n", code[ip++]); break;
case dstore: fprintf(stderr, "dstore %02x\n", code[ip++]); break;
case lstore_0: fprintf(stderr, "lstore_0\n"); break;
case dstore_0: fprintf(stderr, "dstore_0\n"); break;
case lstore_1: fprintf(stderr, "lstore_1\n"); break;
case dstore_1: fprintf(stderr, "dstore_1\n"); break;
case lstore_2: fprintf(stderr, "lstore_2\n"); break;
case dstore_2: fprintf(stderr, "dstore_2\n"); break;
case lstore_3: fprintf(stderr, "lstore_3\n"); break;
case dstore_3: fprintf(stderr, "dstore_3\n"); break;
case lsub: fprintf(stderr, "lsub\n"); break;
case lushr: fprintf(stderr, "lushr\n"); break;
case lxor: fprintf(stderr, "lxor\n"); break;
case monitorenter: fprintf(stderr, "monitorenter\n"); break;
case monitorexit: fprintf(stderr, "monitorexit\n"); break;
case multianewarray: fprintf(stderr, "multianewarray %04x %02x\n", read16(code, ip), code[ip++]); break;
case new_: fprintf(stderr, "new %04x\n", read16(code, ip)); break;
case newarray: fprintf(stderr, "newarray %02x\n", code[ip++]); break;
case nop: fprintf(stderr, "nop\n"); break;
case pop_: fprintf(stderr, "pop\n"); break;
case pop2: fprintf(stderr, "pop2\n"); break;
case putfield: fprintf(stderr, "putfield %04x\n", read16(code, ip)); break;
case putstatic: fprintf(stderr, "putstatic %04x\n", read16(code, ip)); break;
case ret: fprintf(stderr, "ret %02x\n", code[ip++]); break;
case return_: fprintf(stderr, "return_\n"); break;
case saload: fprintf(stderr, "saload\n"); break;
case sastore: fprintf(stderr, "sastore\n"); break;
case sipush: fprintf(stderr, "sipush %04x\n", read16(code, ip)); break;
case swap: fprintf(stderr, "swap\n"); break;
case tableswitch: {
int32_t default_ = read32(code, ip);
int32_t bottom = read32(code, ip);
int32_t top = read32(code, ip);
fprintf(stderr, "tableswitch default: %d bottom: %d top: %d\n", default_, bottom, top);
for (int i = 0; i < top - bottom + 1; i++) {
int32_t d = read32(code, ip);
fprintf(stderr, "%s key: %d dest: %2x\n", prefix, i + bottom, d);
}
} break;
case wide: {
switch (code[ip++]) {
case aload: fprintf(stderr, "wide aload %04x\n", read16(code, ip)); break;
case astore: fprintf(stderr, "wide astore %04x\n", read16(code, ip)); break;
case iinc: fprintf(stderr, "wide iinc %04x %04x\n", read16(code, ip), read16(code, ip)); break;
case iload: fprintf(stderr, "wide iload %04x\n", read16(code, ip)); break;
case istore: fprintf(stderr, "wide istore %04x\n", read16(code, ip)); break;
case lload: fprintf(stderr, "wide lload %04x\n", read16(code, ip)); break;
case lstore: fprintf(stderr, "wide lstore %04x\n", read16(code, ip)); break;
case ret: fprintf(stderr, "wide ret %04x\n", read16(code, ip)); break;
default: {
fprintf(stderr, "unknown wide instruction %02x %04x\n", instr, read16(code, ip));
}
}
} break;
default: {
fprintf(stderr, "unknown instruction %02x\n", instr);
}
}
}
}
object
parseCode(Thread* t, Stream& s, object pool)
{
@ -1310,10 +1720,18 @@ parseCode(Thread* t, Stream& s, object pool)
unsigned maxLocals = s.read2();
unsigned length = s.read4();
if(DebugClassReader) {
fprintf(stderr, " code: maxStack %d maxLocals %d length %d\n", maxStack, maxLocals, length);
}
object code = makeCode(t, pool, 0, 0, 0, maxStack, maxLocals, length);
s.read(&codeBody(t, code, 0), length);
PROTECT(t, code);
if(DebugClassReader) {
disassembleCode(" ", &codeBody(t, code, 0), length);
}
unsigned ehtLength = s.read2();
if (ehtLength) {
object eht = makeExceptionHandlerTable(t, ehtLength);
@ -1452,6 +1870,11 @@ parseMethodTable(Thread* t, Stream& s, object class_, object pool)
PROTECT(t, newVirtuals);
unsigned count = s.read2();
if(DebugClassReader) {
fprintf(stderr, " method count %d\n", count);
}
if (count) {
object methodTable = makeArray(t, count);
PROTECT(t, methodTable);
@ -1467,6 +1890,12 @@ parseMethodTable(Thread* t, Stream& s, object class_, object pool)
unsigned name = s.read2();
unsigned spec = s.read2();
if(DebugClassReader) {
fprintf(stderr, " method flags %d name %d spec %d '%s%s'\n", flags, name, spec,
&byteArrayBody(t, singletonObject(t, pool, name - 1), 0),
&byteArrayBody(t, singletonObject(t, pool, spec - 1), 0));
}
addendum = 0;
code = 0;
@ -3391,8 +3820,11 @@ parseClass(Thread* t, object loader, const uint8_t* data, unsigned size,
uint32_t magic = s.read4();
expect(t, magic == 0xCAFEBABE);
s.read2(); // minor version
s.read2(); // major version
unsigned minorVer = s.read2(); // minor version
unsigned majorVer = s.read2(); // major version
if(DebugClassReader) {
fprintf(stderr, "read class (minor %d major %d)\n", minorVer, majorVer);
}
object pool = parsePool(t, s);
PROTECT(t, pool);
@ -3436,6 +3868,10 @@ parseClass(Thread* t, object loader, const uint8_t* data, unsigned size,
& (ReferenceFlag | WeakReferenceFlag | HasFinalizerFlag
| NeedInitFlag));
}
if(DebugClassReader) {
fprintf(stderr, " flags %d name %d super %d\n", flags, name, super);
}
parseInterfaceTable(t, s, class_, pool, throwType);