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Re: No dynamic memory at all: newlib and sprintf

From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.arch.embedded
Subject Re: No dynamic memory at all: newlib and sprintf
Date 2019-08-30 01:46 -0700
Organization A noiseless patient Spider
Message-ID <874l1zhwh7.fsf@nightsong.com> (permalink)
References <qkaj7s$gki$1@dont-email.me>

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pozz <pozzugno@gmail.com> writes:
> How to remove completely the heap with sprintf functions? Maybe by
> implementing a custom minimal sprintf function?

Use snprintf instead of sprintf on general principles, but both might
allocate some temp space for conversions.  All I can say is see if you
can check the source code for the implementation.  You could put in a
fake malloc that crashes immediately, and see if sprintf actually calls
it with the data that your program passes it.  If it doesn't, that's not
a guarantee, but it is a point of information.

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Thread

No dynamic memory at all: newlib and sprintf pozz <pozzugno@gmail.com> - 2019-08-30 09:29 +0200
  Re: No dynamic memory at all: newlib and sprintf David Brown <david.brown@hesbynett.no> - 2019-08-30 09:57 +0200
    Re: No dynamic memory at all: newlib and sprintf pozz <pozzugno@gmail.com> - 2019-08-30 10:23 +0200
      Re: No dynamic memory at all: newlib and sprintf David Brown <david.brown@hesbynett.no> - 2019-08-30 10:48 +0200
        Re: No dynamic memory at all: newlib and sprintf pozz <pozzugno@gmail.com> - 2019-08-30 14:21 +0200
          Re: No dynamic memory at all: newlib and sprintf pozz <pozzugno@gmail.com> - 2019-08-30 15:39 +0200
            Re: No dynamic memory at all: newlib and sprintf David Brown <david.brown@hesbynett.no> - 2019-09-01 22:47 +0200
              Re: No dynamic memory at all: newlib and sprintf pozz <pozzugno@gmail.com> - 2019-09-01 23:53 +0200
                Re: No dynamic memory at all: newlib and sprintf David Brown <david.brown@hesbynett.no> - 2019-09-02 13:09 +0200
    Re: No dynamic memory at all: newlib and sprintf pozz <pozzugno@gmail.com> - 2019-08-30 10:35 +0200
  Re: No dynamic memory at all: newlib and sprintf Paul Rubin <no.email@nospam.invalid> - 2019-08-30 01:46 -0700
  Re: No dynamic memory at all: newlib and sprintf Dave Nadler <drn@nadler.com> - 2019-08-30 06:17 -0700

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