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build-time: hide boost stacktrace in a .cc file

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Saves about 16s of CPU time. Not a lot but not nothing. Feels more like
the principle of the thing.

Change-Id: I0992d4024317c20d6985a7977d5649edfb9f46bb
This commit is contained in:
jade 2024-08-23 16:57:26 -07:00 committed by Rebecca Turner
parent 04f8a14833
commit a510d17484
Signed by: rbt
SSH key fingerprint: SHA256:SiNaEWabvotTldoNb5jIKqjJ3RnpS4aRXA4KLAdW5vs
2 changed files with 15 additions and 7 deletions
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10
src/libutil/fmt.cc
View file

@ -1,4 +1,9 @@
#include "fmt.hh" // IWYU pragma: keep
// Darwin and FreeBSD stdenv do not define _GNU_SOURCE but do have _Unwind_Backtrace.
#if __APPLE__ || __FreeBSD__
#define BOOST_STACKTRACE_GNU_SOURCE_NOT_REQUIRED
#endif
#include <boost/stacktrace/stacktrace.hpp>
template class boost::basic_format<char>;
@ -11,4 +16,9 @@ template HintFmt::HintFmt(const std::string &, const uint64_t &, const char * co
HintFmt::HintFmt(const std::string & literal) : HintFmt("%s", Uncolored(literal)) {}
void printStackTrace()
{
std::cerr << boost::stacktrace::stacktrace() << std::endl;
}
}

12
src/libutil/fmt.hh
View file

@ -4,11 +4,6 @@
#include <iostream>
#include <string>
#include <boost/format.hpp>
// Darwin and FreeBSD stdenv do not define _GNU_SOURCE but do have _Unwind_Backtrace.
#if __APPLE__ || __FreeBSD__
#define BOOST_STACKTRACE_GNU_SOURCE_NOT_REQUIRED
#endif
#include <boost/stacktrace.hpp>
#include "ansicolor.hh"
// Explicit instantiation in fmt.cc
@ -16,6 +11,9 @@ extern template class boost::basic_format<char>;
namespace nix {
/** Prints a C++ stack trace to stderr using boost stacktrace */
void printStackTrace();
/**
* Values wrapped in this struct are printed in magenta.
*
@ -176,14 +174,14 @@ public:
std::cerr << "HintFmt received incorrect number of format args. Original format string: '";
std::cerr << format << "'; number of arguments: " << sizeof...(args) << "\n";
// And regardless of the coredump give me a damn stacktrace.
std::cerr << boost::stacktrace::stacktrace() << std::endl;
printStackTrace();
abort();
}
} catch (boost::io::format_error & ex) {
// Same thing, but for anything that happens in the member initializers.
std::cerr << "HintFmt received incorrect format string. Original format string: '";
std::cerr << format << "'; number of arguments: " << sizeof...(args) << "\n";
std::cerr << boost::stacktrace::stacktrace() << std::endl;
printStackTrace();
abort();
}