[sdcc-devel] [ sdcc-Bugs-737001 ] Not explictely initialized static variables are undefined

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Bugs item #737001, was opened at 2003-05-13 11:53
Message generated for change (Comment added) made by frief
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Bernhard Held (bernhardheld)
>Assigned to: Nobody/Anonymous (nobody)
Summary: Not explictely initialized static variables are undefined

Initial Comment:
zeropad_storage_idata.c
struct x {
  short a;
  char  b[10];
};

struct x idata teststruct[3] = {
  { 10, {  1, 2, 3, 4, 5} },
  { 20, { 11 } },
  { 30, {  6, 7, 8} }
};

teststruct[0].b[5]...b[9] ...
are not initialized to 0.

bug-227710.c
struct {
    unsigned char index;
} s;

s.index isn't initialized to 0.



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>Comment By: Frieder Ferlemann (frief)
Date: 2004-01-08 20:39

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thanks for applying, this bug is fixed for the mcs51 port.
(others are not yet OK. I'm removing myself as maintainer)
The feature request #482693 is related.

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Comment By: Erik Petrich (epetrich)
Date: 2003-12-16 05:05

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The patch has been applied and is visible in
src/mcs51/main.c 1.77


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Comment By: Frieder Ferlemann (frief)
Date: 2003-12-15 13:49

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Hi Maarten,

thank you for having a close look. I attach a patch which
does as you proposed. Given my recent checkins to the
startup code, chances are that this is not flawless either:(
Unfortunately I can't do check-ins until Friday this week. 
Maybe someone else does?
 
Frieder


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Comment By: Maarten Brock (maartenbrock)
Date: 2003-12-15 10:59

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Hello Frieder,

I've been looking at your fix, but I'm afraid this hasn't been 
tested completely either. You assume R0 is zero which is not 
guaranteed if JZ 00005$ is taken. I suggest swapping the use 
of R0 and R1.

P.S. You're not mentioned as the assigned to developer for 
this bug.

Hope I have helped,
Maarten Brock

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Comment By: Frieder Ferlemann (frief)
Date: 2003-12-14 13:00

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for the mcs51 this is fixed with src/mcs51/main.c (cvs 
1.76) 

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Comment By: Frieder Ferlemann (frief)
Date: 2003-11-13 21:22

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started fixing this for the mcs51.  
Set the environment variable SDCC_GENRAMCLEAR to generate 
code to clear XSEG and idata memory. 
(This clears XSEG, DSEG, BSEG, OSEG, SSEG) 
 
Frieder 

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