*
**************************************************************************/
+#include <stddef.h>
+#include <fstream>
+#include <sstream>
+#include <iomanip>
+
#include <llvm-c/Core.h>
-#include <llvm/Target/TargetMachine.h>
-#include <llvm/Target/TargetRegistry.h>
-#include <llvm/Target/TargetSelect.h>
-#include <llvm/Target/TargetInstrInfo.h>
+#include <llvm-c/Disassembler.h>
#include <llvm/Support/raw_ostream.h>
-#include <llvm/Support/MemoryObject.h>
-
-#if HAVE_LLVM >= 0x0209
+#include <llvm/Support/Format.h>
#include <llvm/Support/Host.h>
-#else
-#include <llvm/System/Host.h>
-#endif
-
-#if HAVE_LLVM >= 0x0207
-#include <llvm/MC/MCDisassembler.h>
-#include <llvm/MC/MCAsmInfo.h>
-#include <llvm/MC/MCInst.h>
-#include <llvm/MC/MCInstPrinter.h>
-#endif /* HAVE_LLVM >= 0x0207 */
+#include <llvm/IR/Module.h>
#include "util/u_math.h"
#include "util/u_debug.h"
#include "lp_bld_debug.h"
+#ifdef __linux__
+#include <sys/stat.h>
+#include <fcntl.h>
+#endif
+
/**
}
-class raw_debug_ostream :
- public llvm::raw_ostream
-{
- uint64_t pos;
-
- void write_impl(const char *Ptr, size_t Size);
- uint64_t current_pos() { return pos; }
- uint64_t current_pos() const { return pos; }
-
-#if HAVE_LLVM >= 0x207
- uint64_t preferred_buffer_size() { return 512; }
-#else
- size_t preferred_buffer_size() { return 512; }
-#endif
-};
-
-
-void
-raw_debug_ostream::write_impl(const char *Ptr, size_t Size)
+extern "C" const char *
+lp_get_module_id(LLVMModuleRef module)
{
- if (Size > 0) {
- char *lastPtr = (char *)&Ptr[Size];
- char last = *lastPtr;
- *lastPtr = 0;
- _debug_printf("%*s", Size, Ptr);
- *lastPtr = last;
- pos += Size;
- }
+ return llvm::unwrap(module)->getModuleIdentifier().c_str();
}
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
}
-#if HAVE_LLVM >= 0x0207
-/*
- * 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;
- }
-};
-#endif /* HAVE_LLVM >= 0x0207 */
-
-
/*
* Disassemble a function, using the LLVM MC disassembler.
*
* - http://blog.llvm.org/2010/01/x86-disassembler.html
* - http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html
*/
-extern "C" void
-lp_disassemble(const void* func)
+static size_t
+disassemble(const void* func, std::ostream &buffer)
{
-#if HAVE_LLVM >= 0x0207
- using namespace llvm;
-
const uint8_t *bytes = (const uint8_t *)func;
/*
* Limit disassembly to this extent
*/
- const uint64_t extent = 0x10000;
-
- uint64_t max_pc = 0;
+ const uint64_t extent = 96 * 1024;
/*
* Initialize all used objects.
*/
- std::string Triple = sys::getHostTriple();
-
- std::string Error;
- const Target *T = TargetRegistry::lookupTarget(Triple, Error);
-
-#if HAVE_LLVM >= 0x0208
- InitializeNativeTargetAsmPrinter();
-#else
- InitializeAllAsmPrinters();
-#endif
-
- InitializeAllDisassemblers();
-
- OwningPtr<const MCAsmInfo> AsmInfo(T->createAsmInfo(Triple));
+ std::string Triple = llvm::sys::getProcessTriple();
+ LLVMDisasmContextRef D = LLVMCreateDisasm(Triple.c_str(), NULL, 0, NULL, NULL);
+ char outline[1024];
- if (!AsmInfo) {
- debug_printf("error: no assembly info for target %s\n", Triple.c_str());
- return;
- }
-
- OwningPtr<const MCDisassembler> DisAsm(T->createMCDisassembler());
- if (!DisAsm) {
- debug_printf("error: no disassembler for target %s\n", Triple.c_str());
- return;
- }
-
- raw_debug_ostream Out;
-
-#if HAVE_LLVM >= 0x0300
- unsigned int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
-#else
- int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
-#endif
-#if HAVE_LLVM >= 0x0208
- OwningPtr<MCInstPrinter> Printer(
- T->createMCInstPrinter(AsmPrinterVariant, *AsmInfo));
-#else
- OwningPtr<MCInstPrinter> Printer(
- T->createMCInstPrinter(AsmPrinterVariant, *AsmInfo, Out));
-#endif
- if (!Printer) {
- debug_printf("error: no instruction printer for target %s\n", Triple.c_str());
- return;
+ if (!D) {
+ buffer << "error: could not create disassembler for triple "
+ << Triple.c_str() << '\n';
+ return 0;
}
-#if HAVE_LLVM >= 0x0300
- TargetMachine *TM = T->createTargetMachine(Triple, sys::getHostCPUName(), "");
-#else
- TargetMachine *TM = T->createTargetMachine(Triple, "");
-#endif
-
- const TargetInstrInfo *TII = TM->getInstrInfo();
-
- /*
- * 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.
*/
- debug_printf("%6lu:\t", (unsigned long)pc);
+ buffer << std::setw(6) << (unsigned long)pc << ":\t";
+
+ Size = LLVMDisasmInstruction(D, (uint8_t *)bytes + pc, extent - pc, 0, outline,
+ sizeof outline);
- if (!DisAsm->getInstruction(Inst, Size, memoryObject,
- pc,
- nulls())) {
- debug_printf("invalid\n");
+ if (!Size) {
+ buffer << "invalid\n";
pc += 1;
+ break;
}
/*
if (0) {
unsigned i;
for (i = 0; i < Size; ++i) {
- debug_printf("%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) {
- debug_printf(" ");
+ buffer << std::dec << " ";
}
}
* Print the instruction.
*/
-#if HAVE_LLVM >= 0x208
- Printer->printInst(&Inst, Out);
-#else
- Printer->printInst(&Inst);
-#endif
- Out.flush();
+ buffer << std::setw(Size) << outline << '\n';
/*
- * Advance.
+ * Stop disassembling on return statements, if there is no record of a
+ * jump to a successive address.
+ *
+ * XXX: This currently assumes x86
*/
- pc += Size;
-
-#if HAVE_LLVM >= 0x0300
- const MCInstrDesc &TID = TII->get(Inst.getOpcode());
-#else
- const TargetInstrDesc &TID = TII->get(Inst.getOpcode());
+#if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
+ if (Size == 1 && bytes[pc] == 0xc3) {
+ break;
+ }
#endif
/*
- * Keep track of forward jumps to a nearby address.
+ * Advance.
*/
- 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.
- */
- debug_printf("\t\t; %lu", (unsigned long)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;
- }
- }
- }
- }
-
- debug_printf("\n");
-
- /*
- * Stop disassembling on return statements, if there is no record of a
- * jump to a successive address.
- */
+ pc += Size;
- if (TID.isReturn()) {
- if (pc > max_pc) {
- break;
- }
+ 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';
}
- debug_printf("\n");
-#else /* HAVE_LLVM < 0x0207 */
+ return pc;
+}
+
+
+extern "C" void
+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");
+}
+
+
+/*
+ * Linux perf profiler integration.
+ *
+ * See also:
+ * - http://penberg.blogspot.co.uk/2009/06/jato-has-profiler.html
+ * - https://github.com/penberg/jato/commit/73ad86847329d99d51b386f5aba692580d1f8fdc
+ * - http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=80d496be89ed7dede5abee5c057634e80a31c82d
+ */
+extern "C" void
+lp_profile(LLVMValueRef func, const void *code)
+{
+#if defined(__linux__) && defined(PROFILE)
+ static std::ofstream perf_asm_file;
+ static boolean first_time = TRUE;
+ static FILE *perf_map_file = NULL;
+ if (first_time) {
+ /*
+ * We rely on the disassembler for determining a function's size, but
+ * the disassembly is a leaky and slow operation, so avoid running
+ * this except when running inside linux perf, which can be inferred
+ * by the PERF_BUILDID_DIR environment variable.
+ */
+ if (getenv("PERF_BUILDID_DIR")) {
+ pid_t pid = getpid();
+ char filename[256];
+ 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);
+ perf_asm_file.open(filename);
+ }
+ first_time = FALSE;
+ }
+ if (perf_map_file) {
+ const char *symbol = LLVMGetValueName(func);
+ unsigned long addr = (uintptr_t)code;
+ 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);
+ }
+#else
(void)func;
-#endif /* HAVE_LLVM < 0x0207 */
+ (void)code;
+#endif
}
+
projects / mesa.git / blobdiff