**************************************************************************/
#include <stddef.h>
+#include <fstream>
+#include <sstream>
+#include <iomanip>
#include <llvm-c/Core.h>
-#include <llvm/Target/TargetMachine.h>
-#include <llvm/Target/TargetInstrInfo.h>
+#include <llvm-c/Disassembler.h>
#include <llvm/Support/raw_ostream.h>
#include <llvm/Support/Format.h>
-#include <llvm/Support/MemoryObject.h>
-
-#if HAVE_LLVM >= 0x0306
-#include <llvm/Target/TargetSubtargetInfo.h>
-#endif
-
-#include <llvm/Support/TargetRegistry.h>
-#include <llvm/MC/MCSubtargetInfo.h>
-
#include <llvm/Support/Host.h>
-
#include <llvm/IR/Module.h>
-#include <llvm/MC/MCDisassembler.h>
-#include <llvm/MC/MCAsmInfo.h>
-#include <llvm/MC/MCInst.h>
-#include <llvm/MC/MCInstPrinter.h>
-#include <llvm/MC/MCRegisterInfo.h>
-
-#if HAVE_LLVM >= 0x0305
-#define OwningPtr std::unique_ptr
-#else
-#include <llvm/ADT/OwningPtr.h>
-#endif
-
-#if HAVE_LLVM >= 0x0305
-#include <llvm/MC/MCContext.h>
-#endif
-
#include "util/u_math.h"
#include "util/u_debug.h"
}
-class raw_debug_ostream :
- public llvm::raw_ostream
-{
-private:
- uint64_t pos;
-
-public:
- raw_debug_ostream() : pos(0) { }
-
- void write_impl(const char *Ptr, size_t Size);
-
- uint64_t current_pos() const { return pos; }
- size_t preferred_buffer_size() const { return 512; }
-};
-
-
-void
-raw_debug_ostream::write_impl(const char *Ptr, size_t Size)
-{
- if (Size > 0) {
- char *lastPtr = (char *)&Ptr[Size];
- char last = *lastPtr;
- *lastPtr = 0;
- _debug_printf("%*s", Size, Ptr);
- *lastPtr = last;
- pos += Size;
- }
-}
-
-
extern "C" const char *
lp_get_module_id(LLVMModuleRef module)
{
extern "C" void
lp_debug_dump_value(LLVMValueRef value)
{
-#if (defined(PIPE_OS_WINDOWS) && !defined(PIPE_CC_MSVC)) || defined(PIPE_OS_EMBDDED)
- raw_debug_ostream os;
+#if HAVE_LLVM >= 0x0304
+ char *str = LLVMPrintValueToString(value);
+ if (str) {
+ os_log_message(str);
+ LLVMDisposeMessage(str);
+ }
+#elif defined(PIPE_OS_WINDOWS) || defined(PIPE_OS_EMBEDDED)
+ std::string str;
+ llvm::raw_string_ostream os(str);
llvm::unwrap(value)->print(os);
- os.flush();
+ os_log_message(str.c_str());
#else
LLVMDumpValue(value);
#endif
}
-/*
- * MemoryObject wrapper around a buffer of memory, to be used by MC
- * disassembler.
- */
-class BufferMemoryObject:
- public llvm::MemoryObject
-{
-private:
- const uint8_t *Bytes;
- uint64_t Length;
-public:
- BufferMemoryObject(const uint8_t *bytes, uint64_t length) :
- Bytes(bytes), Length(length)
- {
- }
-
- uint64_t getBase() const
- {
- return 0;
- }
-
- uint64_t getExtent() const
- {
- return Length;
- }
-
- int readByte(uint64_t addr, uint8_t *byte) const
- {
- if (addr > getExtent())
- return -1;
- *byte = Bytes[addr];
- return 0;
- }
-};
-
-
/*
* Disassemble a function, using the LLVM MC disassembler.
*
* - http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html
*/
static size_t
-disassemble(const void* func, llvm::raw_ostream & Out)
+disassemble(const void* func, std::ostream &buffer)
{
- using namespace llvm;
-
const uint8_t *bytes = (const uint8_t *)func;
/*
*/
const uint64_t extent = 96 * 1024;
- uint64_t max_pc = 0;
-
/*
* Initialize all used objects.
*/
- std::string Triple = sys::getDefaultTargetTriple();
-
- std::string Error;
- const Target *T = TargetRegistry::lookupTarget(Triple, Error);
-
-#if HAVE_LLVM >= 0x0304
- OwningPtr<const MCAsmInfo> AsmInfo(T->createMCAsmInfo(*T->createMCRegInfo(Triple), Triple));
-#else
- OwningPtr<const MCAsmInfo> AsmInfo(T->createMCAsmInfo(Triple));
-#endif
-
- if (!AsmInfo) {
- Out << "error: no assembly info for target " << Triple << "\n";
- Out.flush();
- return 0;
- }
-
- unsigned int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
-
- OwningPtr<const MCRegisterInfo> MRI(T->createMCRegInfo(Triple));
- if (!MRI) {
- Out << "error: no register info for target " << Triple.c_str() << "\n";
- Out.flush();
- return 0;
- }
-
- OwningPtr<const MCInstrInfo> MII(T->createMCInstrInfo());
- if (!MII) {
- Out << "error: no instruction info for target " << Triple.c_str() << "\n";
- Out.flush();
- return 0;
- }
-
-#if HAVE_LLVM >= 0x0305
- OwningPtr<const MCSubtargetInfo> STI(T->createMCSubtargetInfo(Triple, sys::getHostCPUName(), ""));
- OwningPtr<MCContext> MCCtx(new MCContext(AsmInfo.get(), MRI.get(), 0));
- OwningPtr<const MCDisassembler> DisAsm(T->createMCDisassembler(*STI, *MCCtx));
-#else
- OwningPtr<const MCSubtargetInfo> STI(T->createMCSubtargetInfo(Triple, sys::getHostCPUName(), ""));
- OwningPtr<const MCDisassembler> DisAsm(T->createMCDisassembler(*STI));
-#endif
- if (!DisAsm) {
- Out << "error: no disassembler for target " << Triple << "\n";
- Out.flush();
- return 0;
- }
-
+ std::string Triple = llvm::sys::getProcessTriple();
+ LLVMDisasmContextRef D = LLVMCreateDisasm(Triple.c_str(), NULL, 0, NULL, NULL);
+ char outline[1024];
- OwningPtr<MCInstPrinter> Printer(
- T->createMCInstPrinter(AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI));
- if (!Printer) {
- Out << "error: no instruction printer for target " << Triple.c_str() << "\n";
- Out.flush();
+ if (!D) {
+ buffer << "error: could not create disassembler for triple "
+ << Triple.c_str() << '\n';
return 0;
}
- TargetOptions options;
-#if defined(DEBUG)
- options.JITEmitDebugInfo = true;
-#endif
-#if defined(PIPE_ARCH_X86)
- options.StackAlignmentOverride = 4;
-#endif
-#if defined(DEBUG) || defined(PROFILE)
- options.NoFramePointerElim = true;
-#endif
- OwningPtr<TargetMachine> TM(T->createTargetMachine(Triple, sys::getHostCPUName(), "", options));
-
-#if HAVE_LLVM >= 0x0306
- const TargetInstrInfo *TII = TM->getSubtargetImpl()->getInstrInfo();
-#else
- const TargetInstrInfo *TII = TM->getInstrInfo();
-#endif
-
- /*
- * Wrap the data in a MemoryObject
- */
- BufferMemoryObject memoryObject((const uint8_t *)bytes, extent);
-
uint64_t pc;
pc = 0;
- while (true) {
- MCInst Inst;
- uint64_t Size;
+ while (pc < extent) {
+ size_t Size;
/*
* Print address. We use addresses relative to the start of the function,
* so that between runs.
*/
- Out << llvm::format("%6lu:\t", (unsigned long)pc);
+ buffer << std::setw(6) << (unsigned long)pc << ":\t";
- if (!DisAsm->getInstruction(Inst, Size, memoryObject,
- pc,
- nulls(), nulls())) {
- Out << "invalid";
+ Size = LLVMDisasmInstruction(D, (uint8_t *)bytes + pc, extent - pc, 0, outline,
+ sizeof outline);
+
+ if (!Size) {
+ buffer << "invalid\n";
pc += 1;
+ break;
}
/*
if (0) {
unsigned i;
for (i = 0; i < Size; ++i) {
- Out << llvm::format("%02x ", ((const uint8_t*)bytes)[pc + i]);
+ buffer << std::hex << std::setfill('0') << std::setw(2)
+ << static_cast<int> (bytes[pc + i]);
}
for (; i < 16; ++i) {
- Out << " ";
+ buffer << std::dec << " ";
}
}
/*
* Print the instruction.
*/
- Printer->printInst(&Inst, Out, "");
-
- /*
- * Advance.
- */
-
- pc += Size;
- const MCInstrDesc &TID = TII->get(Inst.getOpcode());
+ buffer << std::setw(Size) << outline << '\n';
/*
- * Keep track of forward jumps to a nearby address.
+ * Stop disassembling on return statements, if there is no record of a
+ * jump to a successive address.
+ *
+ * XXX: This currently assumes x86
*/
- if (TID.isBranch()) {
- for (unsigned i = 0; i < Inst.getNumOperands(); ++i) {
- const MCOperand &operand = Inst.getOperand(i);
- if (operand.isImm()) {
- uint64_t jump;
-
- /*
- * FIXME: Handle both relative and absolute addresses correctly.
- * EDInstInfo actually has this info, but operandTypes and
- * operandFlags enums are not exposed in the public interface.
- */
-
- if (1) {
- /*
- * PC relative addr.
- */
-
- jump = pc + operand.getImm();
- } else {
- /*
- * Absolute addr.
- */
-
- jump = (uint64_t)operand.getImm();
- }
-
- /*
- * Output the address relative to the function start, given
- * that MC will print the addresses relative the current pc.
- */
- Out << "\t\t; " << jump;
-
- /*
- * Ignore far jumps given it could be actually a tail return to
- * a random address.
- */
-
- if (jump > max_pc &&
- jump < extent) {
- max_pc = jump;
- }
- }
- }
+#if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
+ if (Size == 1 && bytes[pc] == 0xc3) {
+ break;
}
-
- Out << "\n";
+#endif
/*
- * Stop disassembling on return statements, if there is no record of a
- * jump to a successive address.
+ * Advance.
*/
- if (TID.isReturn()) {
- if (pc > max_pc) {
- break;
- }
+ pc += Size;
+
+ if (pc >= extent) {
+ buffer << "disassembly larger than " << extent << " bytes, aborting\n";
+ break;
}
}
+ buffer << '\n';
+
+ LLVMDisasmDispose(D);
+
/*
* Print GDB command, useful to verify output.
*/
-
if (0) {
- _debug_printf("disassemble %p %p\n", bytes, bytes + pc);
+ buffer << "disassemble " << static_cast<const void*>(bytes) << ' '
+ << static_cast<const void*>(bytes + pc) << '\n';
}
- Out << "\n";
- Out.flush();
-
return pc;
}
extern "C" void
-lp_disassemble(LLVMValueRef func, const void *code) {
- raw_debug_ostream Out;
- Out << LLVMGetValueName(func) << ":\n";
- disassemble(code, Out);
+lp_disassemble(LLVMValueRef func, const void *code)
+{
+ std::ostringstream buffer;
+ std::string s;
+
+ buffer << LLVMGetValueName(func) << ":\n";
+ disassemble(code, buffer);
+ s = buffer.str();
+ os_log_message(s.c_str());
+ os_log_message("\n");
}
extern "C" void
lp_profile(LLVMValueRef func, const void *code)
{
-#if defined(__linux__) && (defined(DEBUG) || defined(PROFILE))
+#if defined(__linux__) && defined(PROFILE)
+ static std::ofstream perf_asm_file;
static boolean first_time = TRUE;
static FILE *perf_map_file = NULL;
- static int perf_asm_fd = -1;
if (first_time) {
/*
* We rely on the disassembler for determining a function's size, but
util_snprintf(filename, sizeof filename, "/tmp/perf-%llu.map", (unsigned long long)pid);
perf_map_file = fopen(filename, "wt");
util_snprintf(filename, sizeof filename, "/tmp/perf-%llu.map.asm", (unsigned long long)pid);
- mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
- perf_asm_fd = open(filename, O_WRONLY | O_CREAT, mode);
+ perf_asm_file.open(filename);
}
first_time = FALSE;
}
if (perf_map_file) {
const char *symbol = LLVMGetValueName(func);
unsigned long addr = (uintptr_t)code;
- llvm::raw_fd_ostream Out(perf_asm_fd, false);
- Out << symbol << ":\n";
- unsigned long size = disassemble(code, Out);
+ perf_asm_file << symbol << ":\n";
+ unsigned long size = disassemble(code, perf_asm_file);
+ perf_asm_file.flush();
fprintf(perf_map_file, "%lx %lx %s\n", addr, size, symbol);
fflush(perf_map_file);
}
projects / mesa.git / blobdiff