greatly improve trace-generating checkpoint process with QEMU hack

.gitignore

@@ -61,6 +61,7 @@ linux/testvector-generation/genCheckpoint.gdb
 linux/testvector-generation/silencePipe
 linux/testvector-generation/silencePipe.control
 linux/testvector-generation/fixBinMem
+linux/testvector-generation/qemu-serial
 *.dtb
 synthDC/WORK
 synthDC/alib-52

linux/testvector-generation/0001-bens-hack-to-turn-on-logging-mid-execution-using-GDB.patch

@@ -0,0 +1,53 @@
+From f9882bd274bde82d8c38a9c31692b6ee33d8cd9a Mon Sep 17 00:00:00 2001
+From: root <root@tera.eng.hmc.edu>
+Date: Mon, 28 Feb 2022 22:48:29 +0000
+Subject: [PATCH] bens hack to turn on logging mid-execution using GDB
+
+---
+ gdbstub.c | 23 +++++++++++++++++++++++
+ 1 file changed, 23 insertions(+)
+
+diff --git a/gdbstub.c b/gdbstub.c
+index 141d7bc4ec..98ecce1b67 100644
+--- a/gdbstub.c
++++ b/gdbstub.c
+@@ -2317,6 +2317,23 @@ static void handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx)
+     }
+     put_packet("OK");
+ }
++
++static void handle_set_qemu_logging(GArray *params, void *user_ctx)
++{
++    if (!params->len) {
++        put_packet("E22");
++        return;
++    }
++
++    int log_mask;
++    if (!get_param(params, 0)->val_ul) {
++        log_mask = 0;
++    } else {
++        log_mask = CPU_LOG_TB_IN_ASM | CPU_LOG_INT | CPU_LOG_TB_CPU | CPU_LOG_TB_NOCHAIN;
++    }
++    qemu_set_log(log_mask);
++    put_packet("OK");
++}
+ #endif
+ 
+ static const GdbCmdParseEntry gdb_gen_query_set_common_table[] = {
+@@ -2430,6 +2447,12 @@ static const GdbCmdParseEntry gdb_gen_set_table[] = {
+         .cmd_startswith = 1,
+         .schema = "l0"
+     },
++    {
++        .handler = handle_set_qemu_logging,
++        .cmd = "qemu.Logging:",
++        .cmd_startswith = 1,
++        .schema = "l0"
++    },
+ #endif
+ };
+ 
+-- 
+2.27.0
+

linux/testvector-generation/createGenCheckpointScript.py

@@ -35,9 +35,6 @@ maintenance packet Qqemu.PhyMemMode:1
 # Symbol file
 file {vmlinux}
 
-# Silence Trace Generation
-shell echo 1 > ./silencePipe.control
-
 # Step over reset vector into actual code
 stepi 100
 # Proceed to checkpoint 
@@ -56,11 +53,11 @@ set logging off
 
 # Log main memory to a file
 print "GDB storing RAM to {ramPath}\\n"
-#dump binary memory {ramPath} 0x80000000 0xffffffff
+dump binary memory {ramPath} 0x80000000 0xffffffff
-#dump binary memory {ramPath} 0x80000000 0x80ffffff
+dump binary memory {ramPath} 0x80000000 0x80ffffff
 
 # Generate Trace Until End
-shell echo 0 > ./silencePipe.control
+maintenance packet Qqemu.Logging:1
 # Do this by setting an impossible breakpoint
 b *0x1000
 del 1

linux/testvector-generation/genCheckpoint.sh

@@ -1,9 +1,9 @@
 #!/bin/bash
-tcpPort=1237
+tcpPort=1238
 imageDir=$RISCV/buildroot/output/images
 tvDir=$RISCV/linux-testvectors
 recordFile="$tvDir/all.qemu"
-traceFile="$tvDir/all_up_to_498.txt"
+traceFile="$tvDir/all.txt"
 
 # Parse Commandline Arg
 if [ "$#" -ne 1 ]; then
@@ -30,7 +30,6 @@ echo
 if [[ $REPLY =~ ^[Yy]$ ]]
 then
     echo "Creating checkpoint at $instrs instructions!"
-    make silencePipe
 
     # Create Output Directory
     echo "Elevating permissions to create $checkPtDir and stuff inside it"
@@ -66,9 +65,8 @@ then
     -nographic \
     -bios $imageDir/fw_jump.elf -kernel $imageDir/Image -append "root=/dev/vda ro" -initrd $imageDir/rootfs.cpio \
     -singlestep -rtc clock=vm -icount shift=0,align=off,sleep=on,rr=replay,rrfile=$recordFile \
-    -d nochain,cpu,in_asm,int \
     -gdb tcp::$tcpPort -S \
-    2>&1 >/dev/null | ./silencePipe | ./parseQEMUtoGDB/parseQEMUtoGDB_run.py | ./parseGDBtoTrace/parseGDBtoTrace_run.py $interruptsFile | ./remove_dup.awk > $outTraceFile) \
+    2>&1 1>./qemu-serial | ./parseQEMUtoGDB/parseQEMUtoGDB_run.py | ./parseGDBtoTrace/parseGDBtoTrace_run.py $interruptsFile | ./remove_dup.awk > $outTraceFile) \
     & riscv64-unknown-elf-gdb --quiet -ex "source genCheckpoint.gdb"
     echo "Completed GDB script at $(date +%H:%M:%S)"