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strace: Add comment trying to explain confusing code

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Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2016-10-22 22:39:31 +02:00
parent 46c472a1c1
commit 61401f24ef
1 changed files with 6 additions and 0 deletions
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6
winsup/utils/strace.cc
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@ -472,6 +472,12 @@ handle_output_debug_string (DWORD id, LPVOID p, unsigned mask, FILE *ofile)
len = 17; len = 17;
} }
/* Note that the following code deliberately points buf 20 bytes into the
allocated area. The subsequent code then overwrites the usecs value
given in the application's debug string, which potentially prepends
characters to the string. If that sounds confusing and dangerous, well...
TODO: This needs a cleanup. */
char *buf; char *buf;
buf = (char *) alloca (len + 85) + 20; buf = (char *) alloca (len + 85) + 20;