From f9526ac188d74a3b3c4af8cc3f2c178cd0b24728 Mon Sep 17 00:00:00 2001
From: Lang Hames <lhames@gmail.com>
Date: Mon, 25 Aug 2014 18:37:38 +0000
Subject: [PATCH] [MCJIT] Make RuntimeDyld dump section contents in -debug
 mode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216400 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../RuntimeDyld/RuntimeDyld.cpp               | 34 +++++++++++++++++--
 .../RuntimeDyld/RuntimeDyldMachO.cpp          |  4 +--
 2 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
index 4be16915cbc..8ac2217e90d 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -41,6 +41,35 @@ void RuntimeDyldImpl::registerEHFrames() {}
 
 void RuntimeDyldImpl::deregisterEHFrames() {}
 
+static void dumpSectionMemory(const SectionEntry &S) {
+  dbgs() << "----- Contents of section " << S.Name << " -----";
+
+  uint8_t *DataAddr = S.Address;
+  uint64_t LoadAddr = S.LoadAddress;
+
+  unsigned StartPadding = LoadAddr & 7;
+  unsigned BytesRemaining = S.Size;
+
+  if (StartPadding) {
+    dbgs() << "\n" << format("0x%08x", LoadAddr & ~7) << ":";
+    while (StartPadding--)
+      dbgs() << "   ";
+  }
+
+  while (BytesRemaining > 0) {
+    if ((LoadAddr & 7) == 0)
+      dbgs() << "\n" << format("0x%08x", LoadAddr) << ":";
+
+    dbgs() << " " << format("%02x", *DataAddr);
+
+    ++DataAddr;
+    ++LoadAddr;
+    --BytesRemaining;
+  }
+
+  dbgs() << "\n";
+}
+
 // Resolve the relocations for all symbols we currently know about.
 void RuntimeDyldImpl::resolveRelocations() {
   MutexGuard locked(lock);
@@ -56,7 +85,8 @@ void RuntimeDyldImpl::resolveRelocations() {
     // entry provides the section to which the relocation will be applied.
     uint64_t Addr = Sections[i].LoadAddress;
     DEBUG(dbgs() << "Resolving relocations Section #" << i << "\t"
-                 << format("%p", (uint8_t *)Addr) << "\n");
+                 << format("0x%x", Addr) << "\n");
+    DEBUG(dumpSectionMemory(Sections[i]));
     resolveRelocationList(Relocations[i], Addr);
     Relocations.erase(i);
   }
@@ -371,7 +401,7 @@ void RuntimeDyldImpl::emitCommonSymbols(ObjectImage &Obj,
   if (!Addr)
     report_fatal_error("Unable to allocate memory for common symbols!");
   uint64_t Offset = 0;
-  Sections.push_back(SectionEntry(StringRef(), Addr, TotalSize, 0));
+  Sections.push_back(SectionEntry("<common symbols>", Addr, TotalSize, 0));
   memset(Addr, 0, TotalSize);
 
   DEBUG(dbgs() << "emitCommonSection SectionID: " << SectionID << " new addr: "
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
index 3e27a8b8d55..35736a4df2c 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
@@ -104,8 +104,8 @@ void RuntimeDyldMachO::dumpRelocationToResolve(const RelocationEntry &RE,
 
   dbgs() << "resolveRelocation Section: " << RE.SectionID
          << " LocalAddress: " << format("%p", LocalAddress)
-         << " FinalAddress: " << format("%p", FinalAddress)
-         << " Value: " << format("%p", Value) << " Addend: " << RE.Addend
+         << " FinalAddress: " << format("0x%x", FinalAddress)
+         << " Value: " << format("0x%x", Value) << " Addend: " << RE.Addend
          << " isPCRel: " << RE.IsPCRel << " MachoType: " << RE.RelType
          << " Size: " << (1 << RE.Size) << "\n";
 }
-- 
2.34.1