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| author | Kartik Agaram <vc@akkartik.com> | 2018-10-10 21:14:21 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-10-10 21:21:18 -0700 |
| commit | a0467aa2021d5b62b5d824b6119291bc73c4f16b (patch) | |
| tree | 1e33d5ac09ed13db450ca1d3b167d12952234111 /subx/055trace.subx | |
| parent | 73a9f0f787134d3662e7165af472cf5e7377ee05 (diff) | |
| download | mu-a0467aa2021d5b62b5d824b6119291bc73c4f16b.tar.gz | |
4680
Maps have definitely helped with debugging. Even having just the top of the call stack is very helpful. We're soon gonna need setup/teardown for tests. I'm not sure how compiling run-tests will work then.
Diffstat (limited to 'subx/055trace.subx')
| -rw-r--r-- | subx/055trace.subx | 91 |
1 files changed, 89 insertions, 2 deletions
diff --git a/subx/055trace.subx b/subx/055trace.subx index 039496c8..b29d0f36 100644 --- a/subx/055trace.subx +++ b/subx/055trace.subx @@ -72,6 +72,7 @@ trace: # t : (address trace-stream), line : string 55/push-EBP 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP # save registers + 50/push-EAX 51/push-ECX 52/push-EDX 53/push-EBX @@ -116,7 +117,9 @@ trace: # t : (address trace-stream), line : string 8b/copy 0/mod/indirect 3/rm32/EBX . . . 6/r32/ESI . . # copy *EBX to ESI # t.write += line.length 01/add 0/mod/indirect 0/rm32/EAX . . . 6/r32/ESI . . # add ESI to *EAX - # EAX = &t.data[t.write] + # t.write++ (for the newline we'll append below) + 81 0/subop/add 0/mod/indirect 0/rm32/EAX . . . . . 1/imm32 # add to *EAX + # EAX = &t.data[old t.write] 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 2/index/EDX . 0/r32/EAX 0xc/disp8 . # copy EAX+EDX+12 to EAX # EDX = &line.data[line.length] 8d/copy-address 1/mod/*+disp8 4/rm32/sib 3/base/EBX 6/index/ESI . 2/r32/EDX 4/disp8 . # copy EBX+ESI+4 to EDX @@ -152,12 +155,58 @@ $trace:end: 5b/pop-to-EBX 5a/pop-to-EDX 59/pop-to-ECX + 58/pop-to-EAX # epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP c3/return -test-trace: +clear-trace-stream: # t : (address trace-stream) + # prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # save registers + 50/push-EAX + 51/push-ECX + # EAX = t + 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 0/r32/EAX 8/disp8 . # copy *(EBP+8) to EAX + # ECX = t.length + 8b/copy 1/mod/*+disp8 0/rm32/EAX . . . 1/r32/ECX 8/disp8 . # copy *(EAX+8) to ECX + # ECX = &t.data[t.length] + 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX . 1/r32/ECX 0xc/disp8 . # copy EAX+ECX+12 to ECX + # t.write = 0 + c7/copy 0/mod/direct 0/rm32/EAX . . . . . 0/imm32 # copy to *EAX + # t.read = 0 + c7/copy 1/mod/*+disp8 0/rm32/EAX . . . . 4/disp8 0/imm32 # copy to *(EAX+4) + # EAX = t.data + 81 0/subop/add 3/mod/direct 0/rm32/EAX . . . . . 0xc/imm32 # add to EAX + # while (true) +$clear-trace-stream:loop: + # if EAX >= ECX break + 39/compare 3/mod/direct 0/rm32/EAX . . . 1/r32/ECX . . # compare EAX with ECX + 7d/jump-if-greater-or-equal $clear-trace-stream:end/disp8 + # *EAX = 0 + c7/copy 0/mod/direct 0/rm32/EAX . . . . . 0/imm32 # copy to *EAX + # EAX += 4 + 81 0/subop/add 3/mod/direct 0/rm32/EAX . . . . . 4/imm32 # add to EAX + eb/jump $clear-trace-stream:loop/disp8 +$clear-trace-stream:end: + # restore registers + 59/pop-to-ECX + 58/pop-to-EAX + # epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-trace-single: + # clear-trace-stream(Test-trace-stream) + # push args + 68/push Test-trace-stream/imm32 + # call + e8/call clear-trace-stream/disp32 + # discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP # trace(Test-trace-stream, "Ab") # push args 68/push "Ab"/imm32 @@ -180,4 +229,42 @@ test-trace: # done c3/return +test-trace-appends: + # clear-trace-stream(Test-trace-stream) + # push args + 68/push Test-trace-stream/imm32 + # call + e8/call clear-trace-stream/disp32 + # discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # trace(Test-trace-stream, "C") + # push args + 68/push "C"/imm32 + 68/push Test-trace-stream/imm32 + # call + e8/call trace/disp32 + # discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # trace(Test-trace-stream, "D") + # push args + 68/push "D"/imm32 + 68/push Test-trace-stream/imm32 + # call + e8/call trace/disp32 + # discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # check-ints-equal(*Test-trace-stream.data, 43/C 0a/newline 44/D 0a/newline, msg) + # push args + 68/push "F - test-trace-appends"/imm32 + 68/push 0x0a440a43/imm32/C-newline-D-newline + # push *Test-trace-stream.data + b8/copy-to-EAX Test-trace-stream/imm32 + ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12) + # call + e8/call check-ints-equal/disp32 + # discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # done + c3/return + # vim:nowrap:textwidth=0 |