mtrace: init at 2.33-50
`mtrace(1)` is a small Perl script that interprets and provides human-readable output for `malloc(3)` traces. Even though this is actually part of `glibc` itself I decided to place this into its own package. The main reason for this is that this script has a runtime dependency on Perl which would complicate `stdenv` bootstrapping since we'd have to compile another Perl that doesn't depend on the bootstrap tools that is used as runtime dependency for the stage2 glibc. Since this is only a dev/debugging tool, splitting this up seemed like a reasonable choice to me. On a leaking C program, this can be used like this: $ env MALLOC_TRACE=$(pwd)/trace ./a.out $ ./result/bin/mtrace ./trace Memory not freed: ----------------- Address Size Caller 0x0000000001875690 0x4 at 0x401151 Closes #141924
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@ -198,7 +198,7 @@ stdenv.mkDerivation ({
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BASH_SHELL = "/bin/sh";
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# Used by libgcc, elf-header, and others to determine ABI
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passthru = { inherit version; };
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passthru = { inherit version; minorRelease = version; };
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}
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// (removeAttrs args [ "withLinuxHeaders" "withGd" ]) //
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38
pkgs/development/libraries/glibc/mtrace.nix
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38
pkgs/development/libraries/glibc/mtrace.nix
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@ -0,0 +1,38 @@
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{ glibc, perl }:
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# Small wrapper which only exposes `mtrace(3)` from `glibc`. This can't be placed
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# into `glibc` itself because it depends on Perl which would mean that the final
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# `glibc` inside a stdenv bootstrap has a dependency `glibc -> perl -> bootstrap tools`,
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# so this is now in its own package that isn't used for bootstrapping.
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#
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# `glibc` needs to be overridden here because it's still needed to `./configure` the source in order
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# to have a build environment where we can call the needed make target.
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glibc.overrideAttrs ({ meta ? {}, ... }: {
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pname = "glibc-mtrace";
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buildPhase = ''
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runHook preBuild
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mkdir malloc
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make -C ../glibc-${glibc.minorRelease}/malloc objdir=`pwd` `pwd`/malloc/mtrace;
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runHook postBuild
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'';
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installPhase = ''
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mkdir -p $out/bin
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mv malloc/mtrace $out/bin/
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'';
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# Perl interpreter used for `mtrace`.
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buildInputs = [ perl ];
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# Reset a few things declared by `pkgs.glibc`.
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outputs = [ "out" ];
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separateDebugInfo = false;
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meta = meta // {
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description = "Perl script used to interpret and provide human readable output of the trace log contained in the file mtracedata, whose contents were produced by mtrace(3).";
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};
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})
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@ -16248,6 +16248,8 @@ with pkgs;
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stdenv = gccStdenv; # doesn't compile without gcc
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};
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mtrace = callPackage ../development/libraries/glibc/mtrace.nix { };
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# Provided by libc on Operating Systems that use the Extensible Linker Format.
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elf-header =
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if stdenv.hostPlatform.parsed.kernel.execFormat.name == "elf"
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