Statetrace: Accomodate cross compiling statetrace with scons.

--HG--
rename : util/statetrace/arch/tracechild_amd64.cc => util/statetrace/arch/amd64/tracechild.cc
rename : util/statetrace/arch/tracechild_amd64.hh => util/statetrace/arch/amd64/tracechild.hh
rename : util/statetrace/arch/tracechild_arm.cc => util/statetrace/arch/arm/tracechild.cc
rename : util/statetrace/arch/tracechild_arm.hh => util/statetrace/arch/arm/tracechild.hh
rename : util/statetrace/arch/tracechild_i386.cc => util/statetrace/arch/i386/tracechild.cc
rename : util/statetrace/arch/tracechild_i386.hh => util/statetrace/arch/i386/tracechild.hh
rename : util/statetrace/arch/tracechild_sparc.cc => util/statetrace/arch/sparc/tracechild.cc
rename : util/statetrace/arch/tracechild_sparc.hh => util/statetrace/arch/sparc/tracechild.hh
rename : util/statetrace/tracechild_arch.cc => util/statetrace/base/arch_check.h
rename : util/statetrace/regstate.hh => util/statetrace/base/regstate.hh
rename : util/statetrace/statetrace.cc => util/statetrace/base/statetrace.cc
rename : util/statetrace/tracechild.cc => util/statetrace/base/tracechild.cc
rename : util/statetrace/tracechild.hh => util/statetrace/base/tracechild.hh

2 files changed, 361 insertions, 0 deletions

diff --git a/util/statetrace/arch/arm/tracechild.cc b/util/statetrace/arch/arm/tracechild.cc
new file mode 100644
index 000000000..97b8d06ec
--- /dev/null
+++ b/util/statetrace/arch/arm/tracechild.cc
@@ -0,0 +1,254 @@
+/*
+ * Copyright (c) 2010 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Copyright (c) 2006-2009 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: Ali Saidi
+ *          Gabe Black
+ */
+
+#include <iostream>
+#include <errno.h>
+#include <stdint.h>
+#include <cstring>
+#include <cstdio>
+
+#include "arch/arm/tracechild.hh"
+
+using namespace std;
+
+ARMTraceChild::ARMTraceChild()
+{
+    foundMvn = false;
+
+    for (int x = 0; x < numregs; x++) {
+        memset(&regs, 0, sizeof(regs));
+        memset(&oldregs, 0, sizeof(regs));
+        regDiffSinceUpdate[x] = false;
+    }
+}
+
+bool
+ARMTraceChild::sendState(int socket)
+{
+    uint32_t regVal = 0;
+    uint32_t message[numregs + 1];
+    int pos = 1;
+    message[0] = 0;
+    for (int x = 0; x < numregs; x++) {
+        if (regDiffSinceUpdate[x]) {
+            message[0] = message[0] | (1 << x);
+            message[pos++] = getRegVal(x);
+        }
+    }
+
+    size_t sent = 0;
+    size_t toSend = pos * sizeof(message[0]);
+    uint8_t *messagePtr = (uint8_t *)message;
+    while (toSend != 0) {
+        sent = write(socket, messagePtr, toSend);
+        if (sent == -1) {
+            cerr << "Write failed! " << strerror(errno) << endl;
+            tracing = false;
+            return false;
+        }
+        toSend -= sent;
+        messagePtr += sent;
+    }
+
+    return true;
+}
+
+uint32_t
+ARMTraceChild::getRegs(user_regs &myregs, int num)
+{
+    assert(num < numregs && num >= 0);
+    return myregs.uregs[num];
+}
+
+bool
+ARMTraceChild::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;
+}
+
+int64_t
+ARMTraceChild::getRegVal(int num)
+{
+    return getRegs(regs, num);
+}
+
+int64_t
+ARMTraceChild::getOldRegVal(int num)
+{
+    return getRegs(oldregs,  num);
+}
+
+ostream &
+ARMTraceChild::outputStartState(ostream & os)
+{
+    uint32_t sp = getSP();
+    uint32_t pc = getPC();
+    uint32_t highestInfo = 0;
+    char obuf[1024];
+    sprintf(obuf, "Initial stack pointer = 0x%08x\n", sp);
+    os << obuf;
+    sprintf(obuf, "Initial program counter = 0x%08x\n", pc);
+    os << obuf;
+
+    //Output the argument count
+    int32_t cargc = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+    sprintf(obuf, "0x%08x: Argc = 0x%08x\n", sp, cargc);
+    os << obuf;
+    sp += 4;
+
+    //Output argv pointers
+    int argCount = 0;
+    int32_t cargv;
+    do {
+        cargv = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sprintf(obuf, "0x%08x: argv[%d] = 0x%08x\n",
+                sp, argCount++, cargv);
+        if(cargv)
+            if(highestInfo < cargv)
+                highestInfo = cargv;
+        os << obuf;
+        sp += 4;
+    } while(cargv);
+
+    //Output the envp pointers
+    int envCount = 0;
+    uint32_t cenvp;
+    do {
+        cenvp = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sprintf(obuf, "0x%08x: envp[%d] = 0x%08x\n",
+                sp, envCount++, cenvp);
+        os << obuf;
+        sp += 4;
+    } while(cenvp);
+    uint32_t auxType, auxVal;
+    do {
+        auxType = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sp += 4;
+        auxVal = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        sp += 4;
+        sprintf(obuf, "0x%08x: Auxiliary vector = {0x%08x, 0x%08x}\n",
+                sp - 8, auxType, auxVal);
+        os << obuf;
+    } while(auxType != 0 || auxVal != 0);
+    //Print out the argument strings, environment strings, and file name.
+    string current;
+    uint32_t buf;
+    uint32_t currentStart = sp;
+    bool clearedInitialPadding = false;
+    do {
+        buf = ptrace(PTRACE_PEEKDATA, pid, sp, 0);
+        char * cbuf = (char *)&buf;
+        for (int x = 0; x < sizeof(uint32_t); x++) {
+            if (cbuf[x])
+                current += cbuf[x];
+            else {
+                sprintf(obuf, "0x%08x: \"%s\"\n",
+                        currentStart, current.c_str());
+                os << obuf;
+                current = "";
+                currentStart = sp + x + 1;
+            }
+        }
+        sp += 4;
+        clearedInitialPadding = clearedInitialPadding || buf != 0;
+    } while(!clearedInitialPadding || buf != 0 || sp <= highestInfo);
+    return os;
+}
+
+bool
+ARMTraceChild::step()
+{
+    const uint32_t bkpt_inst = 0xe7f001f0;
+
+    uint32_t lr = getRegVal(14);
+    uint32_t pc = getPC();
+    uint32_t lrOp, subsOp;
+    char obuf[128];
+    bool patch = false;
+
+    // Since ARM uses software breakpoints behind the scenes, they don't work
+    // in read only areas like the page of routines provided by the kernel. The
+    // link register generally holds the address the process wants to the
+    // kernel to return to after it's done, so we'll install a software
+    // breakpoint there.
+    //
+    // Calls into the kernel user page always follow the form:
+    //  MVN ...
+    //  <possible MOV lr,...>
+    //  SUB PC, ...
+    //
+    //  So we look for this pattern and set a breakpoint on the LR at the SUB
+    //  instruction.
+
+
+    subsOp = ptrace(PTRACE_PEEKDATA, pid, pc, 0);
+    if ((subsOp & 0xFFFF0FFF) == 0xe3e00a0f)
+        foundMvn = true;
+
+    if (foundMvn && ((subsOp & 0xFFF0F000) == 0xe240f000)) {
+        foundMvn = false;
+        lrOp = ptrace(PTRACE_PEEKDATA, pid, lr, 0);
+        ptrace(PTRACE_POKEDATA, pid, lr, bkpt_inst);
+        patch = true;
+    }
+    ptraceSingleStep();
+
+    if (patch)
+        ptrace(PTRACE_POKEDATA, pid, lr, lrOp);
+}
+
+
+TraceChild *
+genTraceChild()
+{
+    return new ARMTraceChild;
+}
+
diff --git a/util/statetrace/arch/arm/tracechild.hh b/util/statetrace/arch/arm/tracechild.hh
new file mode 100644
index 000000000..f4e8ca694
--- /dev/null
+++ b/util/statetrace/arch/arm/tracechild.hh
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2010 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Copyright (c) 2009 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: Ali Saidi
+ *          Gabe Black
+ */
+
+#ifndef TRACECHILD_ARM_HH
+#define TRACECHILD_ARM_HH
+
+#include <cassert>
+#include <string>
+#include <sys/user.h>
+#include <sys/ptrace.h>
+#include "base/tracechild.hh"
+
+
+class ARMTraceChild : public TraceChild
+{
+  public:
+    enum RegNum
+    {
+        // r0 - r3 argument, temp, caller save
+        // r4 - r10 callee save
+        // r11 - FP
+        // r12 - temp
+        // r13 - stack
+        // r14 - link
+        // r15 - pc
+        R0, R1, R2, R3, R4, R5, R6, R7,
+        R8, R9, R10, FP, R12, SP, LR, PC,
+        CPSR,
+        numregs
+    };
+  private:
+    uint32_t getRegs(user_regs& myregs, int num);
+    user_regs regs;
+    user_regs oldregs;
+    bool regDiffSinceUpdate[numregs];
+    bool foundMvn;
+
+  protected:
+    bool update(int pid);
+
+  public:
+    ARMTraceChild();
+    bool sendState(int socket);
+
+    int64_t getRegVal(int num);
+    int64_t getOldRegVal(int num);
+
+    bool step();
+
+    uint64_t
+    getPC()
+    {
+        return getRegVal(PC);
+    }
+
+    uint64_t
+    getSP()
+    {
+        return getRegVal(SP);
+    }
+
+    std::ostream & outputStartState(std::ostream & os);
+
+};
+
+#endif
+