sivachandra created this revision.
sivachandra added a reviewer: clayborg.
sivachandra added a subscriber: lldb-commits.
Though r264012 was fancy enough to make reading the jit entry struct
work with templates, the packing and alignment attributes do not work on
Windows. So, this change makes it plain and simple with manual reading
of the jit entry struct.
http://reviews.llvm.org/D18379
Files:
source/Plugins/JITLoader/GDB/JITLoaderGDB.cpp
source/Plugins/JITLoader/GDB/JITLoaderGDB.h
Index: source/Plugins/JITLoader/GDB/JITLoaderGDB.h
===================================================================
--- source/Plugins/JITLoader/GDB/JITLoaderGDB.h
+++ source/Plugins/JITLoader/GDB/JITLoaderGDB.h
@@ -83,7 +83,7 @@
bool
ReadJITDescriptor(bool all_entries);
- template <typename ptr_t, bool packed>
+ template <typename ptr_t>
bool
ReadJITDescriptorImpl(bool all_entries);
Index: source/Plugins/JITLoader/GDB/JITLoaderGDB.cpp
===================================================================
--- source/Plugins/JITLoader/GDB/JITLoaderGDB.cpp
+++ source/Plugins/JITLoader/GDB/JITLoaderGDB.cpp
@@ -28,6 +28,34 @@
using namespace lldb;
using namespace lldb_private;
+//------------------------------------------------------------------
+// Debug Interface Structures
+//------------------------------------------------------------------
+typedef enum
+{
+ JIT_NOACTION = 0,
+ JIT_REGISTER_FN,
+ JIT_UNREGISTER_FN
+} jit_actions_t;
+
+template <typename ptr_t>
+struct jit_code_entry
+{
+ ptr_t next_entry; // pointer
+ ptr_t prev_entry; // pointer
+ ptr_t symfile_addr; // pointer
+ uint64_t symfile_size;
+};
+
+template <typename ptr_t>
+struct jit_descriptor
+{
+ uint32_t version;
+ uint32_t action_flag; // Values are jit_action_t
+ ptr_t relevant_entry; // pointer
+ ptr_t first_entry; // pointer
+};
+
namespace {
PropertyDefinition
@@ -78,44 +106,42 @@
return g_settings_sp;
}
-} // anonymous namespace end
-
-//------------------------------------------------------------------
-// Debug Interface Structures
-//------------------------------------------------------------------
-typedef enum
-{
- JIT_NOACTION = 0,
- JIT_REGISTER_FN,
- JIT_UNREGISTER_FN
-} jit_actions_t;
-
-template <typename ptr_t, bool packed_size>
-struct jit_code_entry
-{
- ptr_t next_entry; // pointer
- ptr_t prev_entry; // pointer
- ptr_t symfile_addr; // pointer
- uint64_t symfile_size __attribute__ ((aligned (8)));
-};
-
-template <typename ptr_t>
-struct jit_code_entry<ptr_t, true>
-{
- ptr_t next_entry; // pointer
- ptr_t prev_entry; // pointer
- ptr_t symfile_addr; // pointer
- uint64_t symfile_size __attribute__ ((packed));
-};
+ template <typename ptr_t>
+ bool ReadJITEntry(const addr_t &from_addr, Process *process, jit_code_entry<ptr_t> *entry)
+ {
+ addr_t addr = from_addr;
+ Error error;
+ size_t bytes_read = 0;
+
+ bytes_read = process->DoReadMemory(addr, &entry->next_entry, sizeof(ptr_t), error);
+ if (bytes_read != sizeof(ptr_t) || !error.Success())
+ return false;
+ addr += sizeof(ptr_t);
+
+ bytes_read = process->DoReadMemory(addr, &entry->prev_entry, sizeof(ptr_t), error);
+ if (bytes_read != sizeof(ptr_t) || !error.Success())
+ return false;
+ addr += sizeof(ptr_t);
+
+ bytes_read = process->DoReadMemory(addr, &entry->symfile_addr, sizeof(ptr_t), error);
+ if (bytes_read != sizeof(ptr_t) || !error.Success())
+ return false;
+ addr += sizeof(ptr_t);
+
+ ArchSpec::Core core = process->GetTarget().GetArchitecture().GetCore();
+ if (ArchSpec::kCore_x86_32_first <= core && core <= ArchSpec::kCore_x86_32_last)
+ addr += addr % 4;
+ else
+ addr += addr % 8;
+
+ bytes_read = process->DoReadMemory(addr, &entry->symfile_size, 8, error);
+ if (bytes_read != 8 || !error.Success())
+ return false;
+
+ return true;
+ }
-template <typename ptr_t>
-struct jit_descriptor
-{
- uint32_t version;
- uint32_t action_flag; // Values are jit_action_t
- ptr_t relevant_entry; // pointer
- ptr_t first_entry; // pointer
-};
+} // anonymous namespace end
JITLoaderGDB::JITLoaderGDB (lldb_private::Process *process) :
JITLoader(process),
@@ -278,21 +304,13 @@
bool
JITLoaderGDB::ReadJITDescriptor(bool all_entries)
{
- Target &target = m_process->GetTarget();
- const ArchSpec &arch_spec = target.GetArchitecture();
- if (arch_spec.GetAddressByteSize() == 8)
- return ReadJITDescriptorImpl<uint64_t, false>(all_entries);
+ if (m_process->GetTarget().GetArchitecture().GetAddressByteSize() == 8)
+ return ReadJITDescriptorImpl<uint64_t>(all_entries);
else
- {
- ArchSpec::Core core = arch_spec.GetCore();
- if (ArchSpec::kCore_x86_32_first <= core && core <= ArchSpec::kCore_x86_32_last)
- return ReadJITDescriptorImpl<uint32_t, true>(all_entries);
- else
- return ReadJITDescriptorImpl<uint32_t, false>(all_entries);
- }
+ return ReadJITDescriptorImpl<uint32_t>(all_entries);
}
-template <typename ptr_t, bool packed>
+template <typename ptr_t>
bool
JITLoaderGDB::ReadJITDescriptorImpl(bool all_entries)
{
@@ -326,10 +344,8 @@
while (jit_relevant_entry != 0)
{
- jit_code_entry<ptr_t, packed> jit_entry;
- const size_t jit_entry_size = sizeof(jit_entry);
- bytes_read = m_process->DoReadMemory(jit_relevant_entry, &jit_entry, jit_entry_size, error);
- if (bytes_read != jit_entry_size || !error.Success())
+ jit_code_entry<ptr_t> jit_entry;
+ if (!ReadJITEntry(jit_relevant_entry, m_process, &jit_entry))
{
if (log)
log->Printf(
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