Remove SPS profiler.

- Conditionals and code blocks. (MOZ_ENABLE_PROFILER_SPS)
- Stub out several profiler-only functions.

1 files changed, 0 insertions, 359 deletions

diff --git a/tools/profiler/lul/LulDwarfSummariser.cpp b/tools/profiler/lul/LulDwarfSummariser.cpp
deleted file mode 100644
index 74c2565df..000000000
--- a/tools/profiler/lul/LulDwarfSummariser.cpp
+++ /dev/null
@@ -1,359 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "LulDwarfSummariser.h"
-
-#include "mozilla/Assertions.h"
-
-// Set this to 1 for verbose logging
-#define DEBUG_SUMMARISER 0
-
-namespace lul {
-
-// Do |s64|'s lowest 32 bits sign extend back to |s64| itself?
-static inline bool fitsIn32Bits(int64 s64) {
-  return s64 == ((s64 & 0xffffffff) ^ 0x80000000) - 0x80000000;
-}
-
-// Check a LExpr prefix expression, starting at pfxInstrs[start] up to
-// the next PX_End instruction, to ensure that:
-// * It only mentions registers that are tracked on this target
-// * The start point is sane
-// If the expression is ok, return NULL.  Else return a pointer
-// a const char* holding a bit of text describing the problem.
-static const char*
-checkPfxExpr(const vector<PfxInstr>* pfxInstrs, int64_t start)
-{
-  size_t nInstrs = pfxInstrs->size();
-  if (start < 0 || start >= (ssize_t)nInstrs) {
-    return "bogus start point";
-  }
-  size_t i;
-  for (i = start; i < nInstrs; i++) {
-    PfxInstr pxi = (*pfxInstrs)[i];
-    if (pxi.mOpcode == PX_End)
-      break;
-    if (pxi.mOpcode == PX_DwReg &&
-        !registerIsTracked((DW_REG_NUMBER)pxi.mOperand)) {
-      return "uses untracked reg";
-    }
-  }
-  return nullptr; // success
-}
-
-
-Summariser::Summariser(SecMap* aSecMap, uintptr_t aTextBias,
-                       void(*aLog)(const char*))
-  : mSecMap(aSecMap)
-  , mTextBias(aTextBias)
-  , mLog(aLog)
-{
-  mCurrAddr = 0;
-  mMax1Addr = 0; // Gives an empty range.
-
-  // Initialise the running RuleSet to "haven't got a clue" status.
-  new (&mCurrRules) RuleSet();
-}
-
-void
-Summariser::Entry(uintptr_t aAddress, uintptr_t aLength)
-{
-  aAddress += mTextBias;
-  if (DEBUG_SUMMARISER) {
-    char buf[100];
-    SprintfLiteral(buf,
-                   "LUL Entry(%llx, %llu)\n",
-                   (unsigned long long int)aAddress,
-                   (unsigned long long int)aLength);
-    mLog(buf);
-  }
-  // This throws away any previous summary, that is, assumes
-  // that the previous summary, if any, has been properly finished
-  // by a call to End().
-  mCurrAddr = aAddress;
-  mMax1Addr = aAddress + aLength;
-  new (&mCurrRules) RuleSet();
-}
-
-void
-Summariser::Rule(uintptr_t aAddress, int aNewReg,
-                 LExprHow how, int16_t oldReg, int64_t offset)
-{
-  aAddress += mTextBias;
-  if (DEBUG_SUMMARISER) {
-    char buf[100];
-    if (how == NODEREF || how == DEREF) {
-      bool deref = how == DEREF;
-      SprintfLiteral(buf,
-                     "LUL  0x%llx  old-r%d = %sr%d + %lld%s\n",
-                     (unsigned long long int)aAddress, aNewReg,
-                     deref ? "*(" : "", (int)oldReg, (long long int)offset,
-                     deref ? ")" : "");
-    } else if (how == PFXEXPR) {
-      SprintfLiteral(buf,
-                     "LUL  0x%llx  old-r%d = pfx-expr-at %lld\n",
-                     (unsigned long long int)aAddress, aNewReg,
-                     (long long int)offset);
-    } else {
-      SprintfLiteral(buf,
-                     "LUL  0x%llx  old-r%d = (invalid LExpr!)\n",
-                     (unsigned long long int)aAddress, aNewReg);
-    }
-    mLog(buf);
-  }
-
-  if (mCurrAddr < aAddress) {
-    // Flush the existing summary first.
-    mCurrRules.mAddr = mCurrAddr;
-    mCurrRules.mLen  = aAddress - mCurrAddr;
-    mSecMap->AddRuleSet(&mCurrRules);
-    if (DEBUG_SUMMARISER) {
-      mLog("LUL  "); mCurrRules.Print(mLog);
-      mLog("\n");
-    }
-    mCurrAddr = aAddress;
-  }
-
-  // If for some reason summarisation fails, either or both of these
-  // become non-null and point at constant text describing the
-  // problem.  Using two rather than just one avoids complications of
-  // having to concatenate two strings to produce a complete error message.
-  const char* reason1 = nullptr;
-  const char* reason2 = nullptr;
-  
-  // |offset| needs to be a 32 bit value that sign extends to 64 bits
-  // on a 64 bit target.  We will need to incorporate |offset| into
-  // any LExpr made here.  So we may as well check it right now.
-  if (!fitsIn32Bits(offset)) {
-    reason1 = "offset not in signed 32-bit range";
-    goto cant_summarise;
-  }
-
-  // FIXME: factor out common parts of the arch-dependent summarisers.
-
-#if defined(LUL_ARCH_arm)
-
-  // ----------------- arm ----------------- //
-
-  // Now, can we add the rule to our summary?  This depends on whether
-  // the registers and the overall expression are representable.  This
-  // is the heart of the summarisation process.
-  switch (aNewReg) {
-
-    case DW_REG_CFA:
-      // This is a rule that defines the CFA.  The only forms we
-      // choose to represent are: r7/11/12/13 + offset.  The offset
-      // must fit into 32 bits since 'uintptr_t' is 32 bit on ARM,
-      // hence there is no need to check it for overflow.
-      if (how != NODEREF) {
-        reason1 = "rule for DW_REG_CFA: invalid |how|";
-        goto cant_summarise;
-      }
-      switch (oldReg) {
-        case DW_REG_ARM_R7:  case DW_REG_ARM_R11:
-        case DW_REG_ARM_R12: case DW_REG_ARM_R13:
-          break;
-        default:
-          reason1 = "rule for DW_REG_CFA: invalid |oldReg|";
-          goto cant_summarise;
-      }
-      mCurrRules.mCfaExpr = LExpr(how, oldReg, offset);
-      break;
-
-    case DW_REG_ARM_R7:  case DW_REG_ARM_R11: case DW_REG_ARM_R12:
-    case DW_REG_ARM_R13: case DW_REG_ARM_R14: case DW_REG_ARM_R15: {
-      // This is a new rule for R7, R11, R12, R13 (SP), R14 (LR) or
-      // R15 (the return address).
-      switch (how) {
-        case NODEREF: case DEREF:
-          // Check the old register is one we're tracking.
-          if (!registerIsTracked((DW_REG_NUMBER)oldReg) &&
-              oldReg != DW_REG_CFA) {
-            reason1 = "rule for R7/11/12/13/14/15: uses untracked reg";
-            goto cant_summarise;
-          }
-          break;
-        case PFXEXPR: {
-          // Check that the prefix expression only mentions tracked registers.
-          const vector<PfxInstr>* pfxInstrs = mSecMap->GetPfxInstrs();
-          reason2 = checkPfxExpr(pfxInstrs, offset);
-          if (reason2) {
-            reason1 = "rule for R7/11/12/13/14/15: ";
-            goto cant_summarise;
-          }
-          break;
-        }
-        default:
-          goto cant_summarise;
-      }
-      LExpr expr = LExpr(how, oldReg, offset);
-      switch (aNewReg) {
-        case DW_REG_ARM_R7:  mCurrRules.mR7expr  = expr; break;
-        case DW_REG_ARM_R11: mCurrRules.mR11expr = expr; break;
-        case DW_REG_ARM_R12: mCurrRules.mR12expr = expr; break;
-        case DW_REG_ARM_R13: mCurrRules.mR13expr = expr; break;
-        case DW_REG_ARM_R14: mCurrRules.mR14expr = expr; break;
-        case DW_REG_ARM_R15: mCurrRules.mR15expr = expr; break;
-        default: MOZ_ASSERT(0);
-      }
-      break;
-    }
-
-    default:
-      // Leave |reason1| and |reason2| unset here.  This program point
-      // is reached so often that it causes a flood of "Can't
-      // summarise" messages.  In any case, we don't really care about
-      // the fact that this summary would produce a new value for a
-      // register that we're not tracking.  We do on the other hand
-      // care if the summary's expression *uses* a register that we're
-      // not tracking.  But in that case one of the above failures
-      // should tell us which.
-      goto cant_summarise;
-  }
-
-  // Mark callee-saved registers (r4 .. r11) as unchanged, if there is
-  // no other information about them.  FIXME: do this just once, at
-  // the point where the ruleset is committed.
-  if (mCurrRules.mR7expr.mHow == UNKNOWN) {
-    mCurrRules.mR7expr = LExpr(NODEREF, DW_REG_ARM_R7, 0);
-  }
-  if (mCurrRules.mR11expr.mHow == UNKNOWN) {
-    mCurrRules.mR11expr = LExpr(NODEREF, DW_REG_ARM_R11, 0);
-  }
-  if (mCurrRules.mR12expr.mHow == UNKNOWN) {
-    mCurrRules.mR12expr = LExpr(NODEREF, DW_REG_ARM_R12, 0);
-  }
-
-  // The old r13 (SP) value before the call is always the same as the
-  // CFA.
-  mCurrRules.mR13expr = LExpr(NODEREF, DW_REG_CFA, 0);
-
-  // If there's no information about R15 (the return address), say
-  // it's a copy of R14 (the link register).
-  if (mCurrRules.mR15expr.mHow == UNKNOWN) {
-    mCurrRules.mR15expr = LExpr(NODEREF, DW_REG_ARM_R14, 0);
-  }
-
-#elif defined(LUL_ARCH_x64) || defined(LUL_ARCH_x86)
-
-  // ---------------- x64/x86 ---------------- //
-
-  // Now, can we add the rule to our summary?  This depends on whether
-  // the registers and the overall expression are representable.  This
-  // is the heart of the summarisation process.
-  switch (aNewReg) {
-
-    case DW_REG_CFA:
-      // This is a rule that defines the CFA.  The only forms we can
-      // represent are: = SP+offset or = FP+offset.
-      if (how != NODEREF) {
-        reason1 = "rule for DW_REG_CFA: invalid |how|";
-        goto cant_summarise;
-      }
-      if (oldReg != DW_REG_INTEL_XSP && oldReg != DW_REG_INTEL_XBP) {
-        reason1 = "rule for DW_REG_CFA: invalid |oldReg|";
-        goto cant_summarise;
-      }
-      mCurrRules.mCfaExpr = LExpr(how, oldReg, offset);
-      break;
-
-    case DW_REG_INTEL_XSP: case DW_REG_INTEL_XBP: case DW_REG_INTEL_XIP: {
-      // This is a new rule for XSP, XBP or XIP (the return address).
-      switch (how) {
-        case NODEREF: case DEREF:
-          // Check the old register is one we're tracking.
-          if (!registerIsTracked((DW_REG_NUMBER)oldReg) &&
-              oldReg != DW_REG_CFA) {
-            reason1 = "rule for XSP/XBP/XIP: uses untracked reg";
-            goto cant_summarise;
-          }
-          break;
-        case PFXEXPR: {
-          // Check that the prefix expression only mentions tracked registers.
-          const vector<PfxInstr>* pfxInstrs = mSecMap->GetPfxInstrs();
-          reason2 = checkPfxExpr(pfxInstrs, offset);
-          if (reason2) {
-            reason1 = "rule for XSP/XBP/XIP: ";
-            goto cant_summarise;
-          }
-          break;
-        }
-        default:
-          goto cant_summarise;
-      }
-      LExpr expr = LExpr(how, oldReg, offset);
-      switch (aNewReg) {
-        case DW_REG_INTEL_XBP: mCurrRules.mXbpExpr = expr; break;
-        case DW_REG_INTEL_XSP: mCurrRules.mXspExpr = expr; break;
-        case DW_REG_INTEL_XIP: mCurrRules.mXipExpr = expr; break;
-        default: MOZ_CRASH("impossible value for aNewReg");
-      }
-      break;
-    }
-
-    default:
-      // Leave |reason1| and |reason2| unset here, for the reasons
-      // explained in the analogous point in the ARM case just above.
-      goto cant_summarise;
-
-  }
-
-  // On Intel, it seems the old SP value before the call is always the
-  // same as the CFA.  Therefore, in the absence of any other way to
-  // recover the SP, specify that the CFA should be copied.
-  if (mCurrRules.mXspExpr.mHow == UNKNOWN) {
-    mCurrRules.mXspExpr = LExpr(NODEREF, DW_REG_CFA, 0);
-  }
-
-  // Also, gcc says "Undef" for BP when it is unchanged.
-  if (mCurrRules.mXbpExpr.mHow == UNKNOWN) {
-    mCurrRules.mXbpExpr = LExpr(NODEREF, DW_REG_INTEL_XBP, 0);
-  }
-
-#else
-
-# error "Unsupported arch"
-#endif
-
-  return;
-
- cant_summarise:
-  if (reason1 || reason2) {
-    char buf[200];
-    SprintfLiteral(buf, "LUL  can't summarise: "
-                        "SVMA=0x%llx: %s%s, expr=LExpr(%s,%u,%lld)\n",
-                   (unsigned long long int)(aAddress - mTextBias),
-                   reason1 ? reason1 : "", reason2 ? reason2 : "",
-                   NameOf_LExprHow(how),
-                   (unsigned int)oldReg, (long long int)offset);
-    mLog(buf);
-  }
-}
-
-uint32_t
-Summariser::AddPfxInstr(PfxInstr pfxi)
-{
-  return mSecMap->AddPfxInstr(pfxi);
-}
-
-void
-Summariser::End()
-{
-  if (DEBUG_SUMMARISER) {
-    mLog("LUL End\n");
-  }
-  if (mCurrAddr < mMax1Addr) {
-    mCurrRules.mAddr = mCurrAddr;
-    mCurrRules.mLen  = mMax1Addr - mCurrAddr;
-    mSecMap->AddRuleSet(&mCurrRules);
-    if (DEBUG_SUMMARISER) {
-      mLog("LUL  "); mCurrRules.Print(mLog);
-      mLog("\n");
-    }
-  }
-}
-
-} // namespace lul