mirror of
https://github.com/rui314/mold.git
synced 2024-09-20 17:39:56 +03:00
81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
#include "mold.h"
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#include <cstring>
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#include <signal.h>
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#ifdef USE_SYSTEM_MIMALLOC
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#include <mimalloc-new-delete.h>
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#endif
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namespace mold {
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#ifdef GIT_HASH
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const std::string mold_version =
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"mold " MOLD_VERSION " (" GIT_HASH "; compatible with GNU ld)";
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#else
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const std::string mold_version =
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"mold " MOLD_VERSION " (compatible with GNU ld)";
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#endif
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namespace elf {
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int main(int argc, char **argv);
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}
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namespace macho {
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int main(int argc, char **argv);
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}
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void cleanup() {
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if (output_tmpfile)
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unlink(output_tmpfile);
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if (socket_tmpfile)
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unlink(socket_tmpfile);
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}
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// mold mmap's an output file, and the mmap succeeds even if there's
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// no enough space left on the filesystem. The actual disk blocks are
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// not allocated on the mmap call but when the program writes to it
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// for the first time.
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//
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// If a disk becomes full as a result of a write to an mmap'ed memory
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// region, the failure of the write is reported as a SIGBUS. This
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// signal handler catches that signal and print out a user-friendly
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// error message. Without this, it is very hard to realize that the
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// disk might be full.
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static void sighandler(int signo, siginfo_t *info, void *ucontext) {
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static std::mutex mu;
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std::scoped_lock lock{mu};
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if ((signo == SIGSEGV || signo == SIGBUS) &&
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output_buffer_start <= info->si_addr &&
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info->si_addr < output_buffer_end) {
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const char msg[] = "mold: failed to write to an output file. Disk full?\n";
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(void)!write(STDERR_FILENO, msg, sizeof(msg) - 1);
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}
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cleanup();
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_exit(1);
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}
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void install_signal_handler() {
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struct sigaction action;
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action.sa_sigaction = sighandler;
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sigemptyset(&action.sa_mask);
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action.sa_flags = SA_SIGINFO;
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sigaction(SIGINT, &action, NULL);
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sigaction(SIGTERM, &action, NULL);
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sigaction(SIGBUS, &action, NULL);
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}
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} // namespace mold
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int main(int argc, char **argv) {
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std::string cmd = mold::filepath(argv[0]).filename();
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if (cmd == "ld64" || cmd == "ld64.mold")
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return mold::macho::main(argc, argv);
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return mold::elf::main(argc, argv);
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}
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