Stack traces: Difference between revisions
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=={{header|Phix}}== |
=={{header|Phix}}== |
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There no standard method of obtaining a stack trace mid-run (as yet, non-fatally that is), but we can quickly cobble something together: |
There no standard method of obtaining a stack trace mid-run (as yet, non-fatally that is), but we can quickly cobble something together: |
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<lang Phix> |
<!--<lang Phix>--> |
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<span style="color: #008080;">constant</span> <span style="color: #000000;">W</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">machine_word</span><span style="color: #0000FF;">(),</span> |
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{RTN,PREVEBP} = iff(W=4?{8,20}:{16,40}) |
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<span style="color: #0000FF;">{</span><span style="color: #000000;">RTN</span><span style="color: #0000FF;">,</span><span style="color: #000000;">PREVEBP</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">W</span><span style="color: #0000FF;">=</span><span style="color: #000000;">4</span><span style="color: #0000FF;">?{</span><span style="color: #000000;">8</span><span style="color: #0000FF;">,</span><span style="color: #000000;">20</span><span style="color: #0000FF;">}:{</span><span style="color: #000000;">16</span><span style="color: #0000FF;">,</span><span style="color: #000000;">40</span><span style="color: #0000FF;">})</span> |
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procedure show_stack() |
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<span style="color: #008080;">procedure</span> <span style="color: #000000;">show_stack</span><span style="color: #0000FF;">()</span> |
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sequence symtab, symtabN |
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<span style="color: #004080;">sequence</span> <span style="color: #000000;">symtab</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">symtabN</span> |
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integer rtn |
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<span style="color: #004080;">integer</span> <span style="color: #000000;">rtn</span> |
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atom prev_ebp |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">prev_ebp</span> |
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#ilASM{ |
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#ilASM{ |
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[32] |
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lea edi,[symtab] |
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call :%opGetST -- [edi]=symtab (ie our local:=the real symtab) |
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call :%opGetST -- [edi]=symtab (ie our local:=the real symtab) |
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mov |
mov edi,[ebp+20] -- prev_ebp |
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mov [ |
mov eax,[edi+8] -- calling routine no |
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mov |
mov [rtn],eax |
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mov eax,edi |
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lea edi,[prev_ebp] |
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call :%pStoreMint |
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[64] |
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lea rdi,[symtab] |
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call :%opGetST -- [rdi]=symtab (ie our local:=the real symtab) |
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call :%opGetST -- [rdi]=symtab (ie our local:=the real symtab) |
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mov |
mov rdi,[rbp+40] -- prev_ebp |
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mov [ |
mov rax,[rdi+16] -- calling routine no |
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mov |
mov [rtn],rax |
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mov rax,rdi |
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lea rdi,[prev_ebp] |
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call :%pStoreMint |
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[] |
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| ⚫ | |||
while rtn!=21 do -- (T_maintls, main top level routine, always present) |
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<span style="color: #008080;">while</span> <span style="color: #000000;">rtn</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">21</span> <span style="color: #008080;">do</span> <span style="color: #000080;font-style:italic;">-- (T_maintls, main top level routine, always present)</span> |
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symtabN = symtab[rtn] |
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<span style="color: #000000;">symtabN</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">symtab</span><span style="color: #0000FF;">[</span><span style="color: #000000;">rtn</span><span style="color: #0000FF;">]</span> |
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?symtabN[1] |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">symtabN</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> |
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prev_ebp = peekNS(prev_ebp+PREVEBP,W,0) |
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<span style="color: #000000;">prev_ebp</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">peekNS</span><span style="color: #0000FF;">(</span><span style="color: #000000;">prev_ebp</span><span style="color: #0000FF;">+</span><span style="color: #000000;">PREVEBP</span><span style="color: #0000FF;">,</span><span style="color: #000000;">W</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> |
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rtn = peekNS(prev_ebp+RTN,W,0) |
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<span style="color: #000000;">rtn</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">peekNS</span><span style="color: #0000FF;">(</span><span style="color: #000000;">prev_ebp</span><span style="color: #0000FF;">+</span><span style="color: #000000;">RTN</span><span style="color: #0000FF;">,</span><span style="color: #000000;">W</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> |
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end while |
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<span style="color: #008080;">end</span> <span style="color: #008080;">while</span> |
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end procedure |
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<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span> |
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procedure three(bool die) |
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<span style="color: #008080;">procedure</span> <span style="color: #000000;">three</span><span style="color: #0000FF;">(</span><span style="color: #004080;">bool</span> <span style="color: #000000;">die</span><span style="color: #0000FF;">)</span> |
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if die then |
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<span style="color: #008080;">if</span> <span style="color: #000000;">die</span> <span style="color: #008080;">then</span> |
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| ⚫ | |||
<span style="color: #0000FF;">?</span><span style="color: #000000;">9</span><span style="color: #0000FF;">/</span><span style="color: #000000;">0</span> |
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else |
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<span style="color: #008080;">else</span> |
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show_stack() |
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<span style="color: #000000;">show_stack</span><span style="color: #0000FF;">()</span> |
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end if |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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end procedure |
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<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span> |
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procedure two(bool die) |
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<span style="color: #008080;">procedure</span> <span style="color: #000000;">two</span><span style="color: #0000FF;">(</span><span style="color: #004080;">bool</span> <span style="color: #000000;">die</span><span style="color: #0000FF;">)</span> |
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three(die) |
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<span style="color: #000000;">three</span><span style="color: #0000FF;">(</span><span style="color: #000000;">die</span><span style="color: #0000FF;">)</span> |
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end procedure |
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<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span> |
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procedure one(bool die) |
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<span style="color: #008080;">procedure</span> <span style="color: #000000;">one</span><span style="color: #0000FF;">(</span><span style="color: #004080;">bool</span> <span style="color: #000000;">die</span><span style="color: #0000FF;">)</span> |
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two(die) |
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<span style="color: #000000;">two</span><span style="color: #0000FF;">(</span><span style="color: #000000;">die</span><span style="color: #0000FF;">)</span> |
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end procedure |
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<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span> |
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one(0) |
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<span style="color: #000000;">one</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> |
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?routine_id("dummy") -- see note below |
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<span style="color: #0000FF;">?</span><span style="color: #7060A8;">routine_id</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"dummy"</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- see note below</span> |
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| ⚫ | |||
<span style="color: #000000;">one</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span> |
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During compilation, the symbol table entries hold an integer ternary tree index rather than a string name, and normally |
During compilation, the symbol table entries hold an integer ternary tree index rather than a string name, and normally |
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things are left like that during interpretation (the proper string names are always written out when an executable is |
things are left like that during interpretation (the proper string names are always written out when an executable is |
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Alternatively, but only when interpreting (whereas the above works as shown both when interpreting and pre-compiled), the debugger is |
Alternatively, but only when interpreting (whereas the above works as shown both when interpreting and pre-compiled), the debugger is |
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started with the much saner |
started with the much saner |
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<lang Phix> |
<!--<lang Phix>--> |
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<span style="color: #008080;">trace</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span> |
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<!--</lang>--> |
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though as yet it offers no means of examining the stack trace (resume-ably), the above suggests it should be relative easy to add. |
though as yet it offers no means of examining the stack trace (resume-ably), the above suggests it should be relative easy to add. |
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