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progress on recovering from QEMU's errors

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This commit is contained in:
bbracker 2021-07-21 13:00:32 -04:00
parent f9b6bd91f5
commit 82ce85c24f
3 changed files with 25 additions and 12 deletions
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9
wally-pipelined/linux-testgen/testvector-generation/debugBuildroot.sh
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@ -30,10 +30,11 @@ outDir="../linux-testvectors"
# - Makes qemu_in_gdb_format.txt # - Makes qemu_in_gdb_format.txt
# - Splits qemu_in_gdb_format.txt into chunks of 100,000 instrs # - Splits qemu_in_gdb_format.txt into chunks of 100,000 instrs
#cat $intermedDir/qemu_output.txt | ./parse_qemu.py >$intermedDir/qemu_in_gdb_format.txt #cat $intermedDir/qemu_output.txt | ./parse_qemu.py >$intermedDir/qemu_in_gdb_format.txt
cd $intermedDir #cd $intermedDir
split -d -l 5000000 ./qemu_in_gdb_format.txt --verbose #split -d -l 5000000 ./qemu_in_gdb_format.txt --verbose
cd ../../testvector-generation #cd ../../testvector-generation
# Uncomment this version for parse_gdb_output.py debugging # Uncomment this version for parse_gdb_output.py debugging
# - Uses qemu_in_gdb_format.txt # - Uses qemu_in_gdb_format.txt
# - Makes testvectors#cat $intermedDir/qemu_in_gdb_format.txt | ./parse_gdb_output.py "$outDir" # - Makes testvectors
#cat $intermedDir/qemu_in_gdb_format.txt | ./parse_gdb_output.py "$outDir"

8
wally-pipelined/linux-testgen/testvector-generation/gdbinit_debug
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@ -1,10 +1,12 @@
set pagination off set pagination off
file ../buildroot-image-output/fw_jump.elf file ../buildroot-image-output/fw_jump.elf
target extended-remote :1237 target extended-remote :1237
b irqchip_plic_warm_init b *0x80200040
c c
file ../buildroot-image-output/vmlinux file ../buildroot-image-output/vmlinux
b plic_init #b irqchip_plic_warm_init
c #c
#b plic_init
#c
b do_idle b do_idle
c c

16
wally-pipelined/linux-testgen/testvector-generation/parse_qemu.py
View File

@ -36,12 +36,15 @@ def printCSRs():
def parseCSRs(l): def parseCSRs(l):
global parseState, inPageFault, CSRs, pageFaultCSRs, regs, pageFaultCSRs, instrs global parseState, inPageFault, CSRs, pageFaultCSRs, regs, pageFaultCSRs, instrs
if l.strip() and (not l.startswith("Disassembler")) and (not l.startswith("Please")) and not inPageFault: if l.strip() and (not l.startswith("Disassembler")) and (not l.startswith("Please")):
# If we've hit the register file
if l.startswith(' x0/zero'): if l.startswith(' x0/zero'):
parseState = "regFile" parseState = "regFile"
if not inPageFault:
instr = instrs[CSRs["pc"]] instr = instrs[CSRs["pc"]]
printPC(instr) printPC(instr)
parseRegs(l) parseRegs(l)
# If we've hit a CSR
else: else:
csr = l.split()[0] csr = l.split()[0]
val = int(l.split()[1],16) val = int(l.split()[1],16)
@ -64,11 +67,16 @@ def parseCSRs(l):
# However SEPC and STVAL do get corrupted upon exiting # However SEPC and STVAL do get corrupted upon exiting
if endPageFault and ((csr == 'sepc') or (csr == 'stval')): if endPageFault and ((csr == 'sepc') or (csr == 'stval')):
CSRs[csr] = returnAdr CSRs[csr] = returnAdr
pageFaultCSRs[csr] = val
elif pageFaultCSRs and (csr in pageFaultCSRs):
if (val != pageFaultCSRs[csr]):
del pageFaultCSRs[csr]
CSRs[csr] = val
else: else:
CSRs[csr] = val CSRs[csr] = val
def parseRegs(l): def parseRegs(l):
global parseState, inPageFault, CSRs, pageFaultCSRs, regs, pageFaultCSRs, instrs global parseState, inPageFault, CSRs, pageFaultCSRs, regs, pageFaultCSRs, instrs, pageFaultRegs
if "pc" in l: if "pc" in l:
printCSRs() printCSRs()
# New non-disassembled instruction # New non-disassembled instruction
@ -86,6 +94,7 @@ def parseRegs(l):
val = int(s[i+1], 16) val = int(s[i+1], 16)
if inPageFault: if inPageFault:
pageFaultRegs[reg] = val pageFaultRegs[reg] = val
sys.stderr.write(str(pageFaultRegs))
else: else:
if pageFaultRegs and (reg in pageFaultRegs): if pageFaultRegs and (reg in pageFaultRegs):
if (val != pageFaultRegs[reg]): if (val != pageFaultRegs[reg]):
@ -110,9 +119,10 @@ for l in fileinput.input():
elif (parseState == "instr") and l.startswith('0x'): elif (parseState == "instr") and l.startswith('0x'):
if "out of bounds" in l: if "out of bounds" in l:
sys.stderr.write("Detected QEMU page fault error\n") sys.stderr.write("Detected QEMU page fault error\n")
beginPageFault = ~(inPageFault) beginPageFault = not inPageFault
if beginPageFault: if beginPageFault:
returnAdr = int(l.split()[0][2:-1], 16) returnAdr = int(l.split()[0][2:-1], 16)
sys.stderr.write('Saving SEPC of '+hex(returnAdr)+'\n')
inPageFault = 1 inPageFault = 1
else: else:
endPageFault = inPageFault endPageFault = inPageFault