Statetrace: Implement the AMD64 version of TraceChild.

--HG--
extra : convert_revision : cde33fefe46dc05e9b4ea785a4df6b78ac57ccd5

3 files changed, 348 insertions, 2 deletions

diff --git a/util/statetrace/arch/tracechild_amd64.cc b/util/statetrace/arch/tracechild_amd64.cc
new file mode 100644
index 000000000..505745575
--- /dev/null
+++ b/util/statetrace/arch/tracechild_amd64.cc
@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2007 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#include <iostream>
+#include <errno.h>
+#include <sys/ptrace.h>
+#include <stdint.h>
+
+#include "tracechild_amd64.hh"
+
+using namespace std;
+
+char * AMD64TraceChild::regNames[numregs] = {
+                //GPRs
+                "rax", "rbx", "rcx", "rdx",
+                //Index registers
+                "rsi", "rdi",
+                //Base pointer and stack pointer
+                "rbp", "rsp",
+                //New 64 bit mode registers
+                "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+                //Segmentation registers
+                "cs", "ds", "es", "fs", "gs", "ss", "fs_base", "gs_base",
+                //PC
+                "rip",
+                //Flags
+                "eflags"};
+
+bool AMD64TraceChild::sendState(int socket)
+{
+    uint64_t regVal = 0;
+    for(int x = 0; x <= R15; x++)
+    {
+        regVal = getRegVal(x);
+        if(write(socket, &regVal, sizeof(regVal)) == -1)
+        {
+            cerr << "Write failed! " << strerror(errno) << endl;
+            tracing = false;
+            return false;
+        }
+    }
+    regVal = getRegVal(RIP);
+    if(write(socket, &regVal, sizeof(regVal)) == -1)
+    {
+        cerr << "Write failed! " << strerror(errno) << endl;
+        tracing = false;
+        return false;
+    }
+    return true;
+}
+
+int64_t AMD64TraceChild::getRegs(user_regs_struct & myregs, int num)
+{
+        assert(num < numregs && num >= 0);
+        switch(num)
+        {
+                //GPRs
+                case RAX: return myregs.rax;
+                case RBX: return myregs.rbx;
+                case RCX: return myregs.rcx;
+                case RDX: return myregs.rdx;
+                //Index registers
+                case RSI: return myregs.rsi;
+                case RDI: return myregs.rdi;
+                //Base pointer and stack pointer
+                case RBP: return myregs.rbp;
+                case RSP: return myregs.rsp;
+                //New 64 bit mode registers
+                case R8: return myregs.r8;
+                case R9: return myregs.r9;
+                case R10: return myregs.r10;
+                case R11: return myregs.r11;
+                case R12: return myregs.r12;
+                case R13: return myregs.r13;
+                case R14: return myregs.r14;
+                case R15: return myregs.r15;
+                //Segmentation registers
+                case CS: return myregs.cs;
+                case DS: return myregs.ds;
+                case ES: return myregs.es;
+                case FS: return myregs.fs;
+                case GS: return myregs.gs;
+                case SS: return myregs.ss;
+                case FS_BASE: return myregs.fs_base;
+                case GS_BASE: return myregs.gs_base;
+                //PC
+                case RIP: return myregs.rip;
+                //Flags
+                case EFLAGS: return myregs.eflags;
+                default:
+                        assert(0);
+                        return 0;
+        }
+}
+
+bool AMD64TraceChild::update(int pid)
+{
+    oldregs = regs;
+    if(ptrace(PTRACE_GETREGS, pid, 0, &regs) != 0)
+    {
+        cerr << "update: " << strerror(errno) << endl;
+        return false;
+    }
+    for(unsigned int x = 0; x < numregs; x++)
+        regDiffSinceUpdate[x] = (getRegVal(x) != getOldRegVal(x));
+    return true;
+}
+
+AMD64TraceChild::AMD64TraceChild()
+{
+    for(unsigned int x = 0; x < numregs; x++)
+        regDiffSinceUpdate[x] = false;
+}
+
+int64_t AMD64TraceChild::getRegVal(int num)
+{
+        return getRegs(regs, num);
+}
+
+int64_t AMD64TraceChild::getOldRegVal(int num)
+{
+        return getRegs(oldregs, num);
+}
+
+char * AMD64TraceChild::printReg(int num)
+{
+        sprintf(printBuffer, "0x%08X", getRegVal(num));
+        return printBuffer;
+}
+
+ostream & AMD64TraceChild::outputStartState(ostream & os)
+{
+    uint64_t sp = getSP();
+    uint64_t pc = getPC();
+    char obuf[1024];
+    sprintf(obuf, "Initial stack pointer = 0x%016llx\n", sp);
+    os << obuf;
+    sprintf(obuf, "Initial program counter = 0x%016llx\n", pc);
+    os << obuf;
+
+    //Output the argument count
+    uint64_t cargc = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+    sprintf(obuf, "0x%016llx: Argc = 0x%016llx\n", sp, cargc);
+    os << obuf;
+    sp += 8;
+
+    //Output argv pointers
+    int argCount = 0;
+    uint64_t cargv;
+    do
+    {
+        cargv = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sprintf(obuf, "0x%016llx: argv[%d] = 0x%016llx\n",
+                sp, argCount++, cargv);
+        os << obuf;
+        sp += 8;
+    } while(cargv);
+
+    //Output the envp pointers
+    int envCount = 0;
+    uint64_t cenvp;
+    do
+    {
+        cenvp = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sprintf(obuf, "0x%016llx: envp[%d] = 0x%016llx\n",
+                sp, envCount++, cenvp);
+        os << obuf;
+        sp += 8;
+    } while(cenvp);
+    uint64_t auxType, auxVal;
+    do
+    {
+        auxType = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sp += 8;
+        auxVal = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sp += 8;
+        sprintf(obuf, "0x%016llx: Auxiliary vector = {0x%016llx, 0x%016llx}\n",
+                sp - 8, auxType, auxVal);
+        os << obuf;
+    } while(auxType != 0 || auxVal != 0);
+    //Print out the argument strings, environment strings, and file name.
+    string current;
+    uint64_t buf;
+    uint64_t currentStart = sp;
+    bool clearedInitialPadding = false;
+    do
+    {
+        buf = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        char * cbuf = (char *)&buf;
+        for(int x = 0; x < sizeof(uint64_t); x++)
+        {
+            if(cbuf[x])
+                current += cbuf[x];
+            else
+            {
+                sprintf(obuf, "0x%016llx: \"%s\"\n",
+                        currentStart, current.c_str());
+                os << obuf;
+                current = "";
+                currentStart = sp + x + 1;
+            }
+        }
+        sp += 8;
+        clearedInitialPadding = clearedInitialPadding || buf != 0;
+    } while(!clearedInitialPadding || buf != 0);
+    return os;
+}
+
+TraceChild * genTraceChild()
+{
+        return new AMD64TraceChild;
+}
diff --git a/util/statetrace/arch/tracechild_amd64.hh b/util/statetrace/arch/tracechild_amd64.hh
new file mode 100644
index 000000000..36974e56d
--- /dev/null
+++ b/util/statetrace/arch/tracechild_amd64.hh
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2007 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef REGSTATE_AMD64_HH
+#define REGSTATE_AMD64_HH
+
+#include <sys/user.h>
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <assert.h>
+#include <string>
+
+#include "tracechild.hh"
+
+class AMD64TraceChild : public TraceChild
+{
+  public:
+    enum RegNum
+    {
+        //GPRs
+        RAX, RCX, RDX, RBX,
+        //Base pointer and stack pointer
+        RSP, RBP,
+        //Index registers
+        RSI, RDI,
+        //New 64 bit mode registers
+        R8, R9, R10, R11, R12, R13, R14, R15,
+        //Segmentation registers
+        CS, DS, ES, FS, GS, SS, FS_BASE, GS_BASE,
+        //PC
+        RIP,
+        //Flags
+        EFLAGS,
+        numregs
+    };
+  private:
+    char printBuffer [256];
+    static char * regNames[numregs];
+    int64_t getRegs(user_regs_struct & myregs, int num);
+    user_regs_struct regs;
+    user_regs_struct oldregs;
+    bool regDiffSinceUpdate[numregs];
+
+  protected:
+    bool update(int pid);
+
+  public:
+
+    AMD64TraceChild();
+
+    bool sendState(int socket);
+
+    int getNumRegs()
+    {
+        return numregs;
+    }
+
+    bool diffSinceUpdate(int num)
+    {
+        assert(num < numregs && num >= 0);
+        return regDiffSinceUpdate[num];
+    }
+
+    std::string getRegName(int num)
+    {
+        assert(num < numregs && num >= 0);
+        return regNames[num];
+    }
+
+    int64_t getRegVal(int num);
+    int64_t getOldRegVal(int num);
+    uint64_t getPC() {return getRegVal(RIP);}
+    uint64_t getSP() {return getRegVal(RSP);}
+    std::ostream & outputStartState(std::ostream & output);
+
+    char * printReg(int num);
+};
+
+#endif
diff --git a/util/statetrace/tracechild_arch.cc b/util/statetrace/tracechild_arch.cc
index 603ccb12c..570a12b54 100644
--- a/util/statetrace/tracechild_arch.cc
+++ b/util/statetrace/tracechild_arch.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006 The Regents of The University of Michigan
+ * Copyright (c) 2006-2007 The Regents of The University of Michigan
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,8 @@
 #if defined __alpha__
         #error "Alpha architecture not implemented"
 #elif defined __amd64__
-        #error "AMD64 architecture not implemented"
+//        #error "AMD64 architecture not implemented"
+        #include "arch/tracechild_amd64.cc"
 #elif defined __hppa__
         #error "Hppa architecture not implemented"
 #elif defined __i386__ || defined __i486__ || \