3 files changed, 188 insertions, 0 deletions
diff --git a/src/pal/inc/pal.h b/src/pal/inc/pal.h
index de924fc424..8516ce95c9 100644
--- a/src/pal/inc/pal.h
+++ b/src/pal/inc/pal.h
@@ -566,6 +566,30 @@ PAL_DeleteExecWatchpoint(
 
 
 PALIMPORT
+DWORD
+PALAPI
+PAL_PublishDacTableAddress(
+    IN PVOID address,
+    IN ULONG size
+    );
+
+PALIMPORT
+DWORD
+PALAPI
+PAL_GetDacTableAddress(
+    IN DWORD pid,
+    OUT PVOID *pAddress,
+    OUT PULONG pSize
+    );
+
+PALIMPORT
+VOID
+PALAPI
+PAL_CleanupDacTableAddress(
+    );
+
+
+PALIMPORT
 BOOL
 PALAPI
 PAL_RegisterMacEHPort();
diff --git a/src/pal/src/CMakeLists.txt b/src/pal/src/CMakeLists.txt
index 721bbba4a9..d65233ed17 100644
--- a/src/pal/src/CMakeLists.txt
+++ b/src/pal/src/CMakeLists.txt
@@ -89,6 +89,7 @@ set(SOURCES
   misc/fmtmessage.cpp
   misc/interlock.cpp
   misc/miscpalapi.cpp
+  misc/dactableaddress.cpp
   misc/strutil.cpp
   misc/sysinfo.cpp
   misc/time.cpp
diff --git a/src/pal/src/misc/dactableaddress.cpp b/src/pal/src/misc/dactableaddress.cpp
new file mode 100644
index 0000000000..43ef7d68ed
--- /dev/null
+++ b/src/pal/src/misc/dactableaddress.cpp
@@ -0,0 +1,163 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information. 
+//
+
+/*++
+
+
+
+Module Name:
+
+    dactableaddress.cpp
+
+Abstract:
+
+    Functions to write and read DAC global pointer table address between the coreclr
+    and DAC/debugger processes.
+
+NOTE:
+
+   These functions are temporary until a better way to plumb the DAC table
+   address from the debuggee to debugger processes is implemented.
+
+Revision History:
+
+
+--*/
+
+#include "pal/palinternal.h"
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+
+/*++
+Function
+    PAL_PublishDacTableAddress
+
+Parameters
+
+    address
+       [in] address of dac table
+    size
+       [in] size of dac table
+
+Return Values
+   pal errors
+
+--*/
+PALIMPORT
+DWORD
+PALAPI
+PAL_PublishDacTableAddress(
+    IN PVOID address,
+    IN ULONG size)
+{
+    DWORD ret = NO_ERROR;
+
+    // TODO - 3/5/15 - the DAC side needs the debuggee pid
+    // pid_t pid = getpid();
+    pid_t pid = 0;
+    char fileName[100]; 
+    snprintf(fileName, sizeof(fileName), "/tmp/%d_dacTable", pid);
+
+    FILE *file = fopen(fileName, "w+");
+    if (file != nullptr) 
+    {
+        char dacTableAddress[100]; 
+        snprintf(dacTableAddress, sizeof(dacTableAddress), "%p %d\n", address, size);
+
+        if (fputs(dacTableAddress, file) < 0)
+        {
+            ret = ERROR_INVALID_DATA;
+        }
+
+        fclose(file);
+    }
+    else
+    {
+        ret = ERROR_FILE_NOT_FOUND;
+    }
+
+    return ret;
+}
+
+
+/*++
+Function
+    PAL_GetDacTableAddress
+
+Parameters
+
+    pid
+       [in] process id to get the data
+    pAddress
+       [out] pointer to put DAC table address
+    pSize
+       [out] pointer to put DAC table size
+
+Return Values
+   pal errors
+
+--*/
+PALIMPORT
+DWORD
+PALAPI
+PAL_GetDacTableAddress(
+    IN DWORD pid,
+    OUT PVOID *pAddress,
+    OUT PULONG pSize)
+{
+    DWORD ret = NO_ERROR;
+
+    char fileName[100]; 
+    snprintf(fileName, sizeof(fileName), "/tmp/%d_dacTable", pid);
+
+    FILE *file = fopen(fileName, "r");
+    if (file != nullptr) 
+    {
+        char data[100]; 
+        if (fgets(data, sizeof(data), file) != nullptr)
+        {
+            if (sscanf(data, "%p %d\n", pAddress, pSize) != 2)
+            {
+                ret = ERROR_INVALID_DATA;
+            }
+        }
+        else
+        {
+            ret = ERROR_INVALID_DATA;
+        }
+
+        fclose(file);
+    }
+    else
+    {
+        ret = ERROR_FILE_NOT_FOUND;
+    }
+    return ret;
+}
+
+/*++
+Function
+    PAL_CleanupDacTableAddress
+
+Parameters
+    None
+
+Return Values
+   None
+
+--*/
+PALIMPORT
+VOID
+PALAPI
+PAL_CleanupDacTableAddress()
+{
+    //pid_t pid = getpid();
+    pid_t pid = 0;
+    char fileName[100]; 
+    snprintf(fileName, sizeof(fileName), "/tmp/%d_dacTable", pid);
+
+    remove(fileName);
+}