labath created this revision.
labath added reviewers: tberghammer, jasonmolenda.
labath added subscribers: lldb-commits, iancottrell.
This commit adds support for binary memory reads ($x) to lldb-server. It also
removes the "0x"
prefix from the $x client packet, to make it more compatible with the old $m
packet. This allows
us to use almost the same code for handling both packet types. I have verified
that debugserver
correctly handles $x packets even without the leading "0x".
http://reviews.llvm.org/D13695
Files:
source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h
source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
source/Utility/StringExtractorGDBRemote.cpp
source/Utility/StringExtractorGDBRemote.h
Index: source/Utility/StringExtractorGDBRemote.h
===================================================================
--- source/Utility/StringExtractorGDBRemote.h
+++ source/Utility/StringExtractorGDBRemote.h
@@ -145,6 +145,8 @@
eServerPacketType_s,
eServerPacketType_S,
eServerPacketType_T,
+ eServerPacketType_x,
+ eServerPacketType_X,
eServerPacketType_Z,
eServerPacketType_z,
Index: source/Utility/StringExtractorGDBRemote.cpp
===================================================================
--- source/Utility/StringExtractorGDBRemote.cpp
+++ source/Utility/StringExtractorGDBRemote.cpp
@@ -310,6 +310,12 @@
case 'S':
return eServerPacketType_S;
+ case 'x':
+ return eServerPacketType_x;
+
+ case 'X':
+ return eServerPacketType_X;
+
case 'T':
return eServerPacketType_T;
Index: source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
===================================================================
--- source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -3043,14 +3043,8 @@
char packet[64];
int packet_len;
bool binary_memory_read = m_gdb_comm.GetxPacketSupported();
- if (binary_memory_read)
- {
- packet_len = ::snprintf (packet, sizeof(packet), "x0x%" PRIx64 ",0x%" PRIx64, (uint64_t)addr, (uint64_t)size);
- }
- else
- {
- packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size);
- }
+ packet_len = ::snprintf(packet, sizeof(packet), "%c%" PRIx64 ",%" PRIx64,
+ binary_memory_read ? 'x' : 'm', (uint64_t)addr, (uint64_t)size);
assert (packet_len + 1 < (int)sizeof(packet));
StringExtractorGDBRemote response;
if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success)
Index: source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h
===================================================================
--- source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h
+++ source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.h
@@ -202,8 +202,9 @@
PacketResult
Handle_interrupt (StringExtractorGDBRemote &packet);
+ // Handles $m and $x packets.
PacketResult
- Handle_m (StringExtractorGDBRemote &packet);
+ Handle_memory_read (StringExtractorGDBRemote &packet);
PacketResult
Handle_M (StringExtractorGDBRemote &packet);
Index: source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
===================================================================
--- source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
+++ source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
@@ -113,7 +113,7 @@
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_interrupt,
&GDBRemoteCommunicationServerLLGS::Handle_interrupt);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_m,
- &GDBRemoteCommunicationServerLLGS::Handle_m);
+ &GDBRemoteCommunicationServerLLGS::Handle_memory_read);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_M,
&GDBRemoteCommunicationServerLLGS::Handle_M);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_p,
@@ -164,6 +164,8 @@
&GDBRemoteCommunicationServerLLGS::Handle_vCont);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_vCont_actions,
&GDBRemoteCommunicationServerLLGS::Handle_vCont_actions);
+ RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_x,
+ &GDBRemoteCommunicationServerLLGS::Handle_memory_read);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_Z,
&GDBRemoteCommunicationServerLLGS::Handle_Z);
RegisterMemberFunctionHandler(StringExtractorGDBRemote::eServerPacketType_z,
@@ -1975,7 +1977,7 @@
}
GDBRemoteCommunication::PacketResult
-GDBRemoteCommunicationServerLLGS::Handle_m (StringExtractorGDBRemote &packet)
+GDBRemoteCommunicationServerLLGS::Handle_memory_read(StringExtractorGDBRemote &packet)
{
Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
@@ -2008,7 +2010,7 @@
{
if (log)
log->Printf ("GDBRemoteCommunicationServerLLGS::%s nothing to read: zero-length packet", __FUNCTION__);
- return PacketResult::Success;
+ return SendOKResponse();
}
// Allocate the response buffer.
@@ -2035,8 +2037,16 @@
}
StreamGDBRemote response;
- for (size_t i = 0; i < bytes_read; ++i)
- response.PutHex8(buf[i]);
+ packet.SetFilePos(0);
+ char kind = packet.GetChar('?');
+ if (kind == 'x')
+ response.PutEscapedBytes(buf.data(), byte_count);
+ else
+ {
+ assert(kind == 'm');
+ for (size_t i = 0; i < bytes_read; ++i)
+ response.PutHex8(buf[i]);
+ }
return SendPacketNoLock(response.GetData(), response.GetSize());
}
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