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Retry read() syscall on EINTR (#21188)

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The read() syscall can get interrupted by a signal, in which case
you can just retry the read call instead of failing with an error.
This is most noticeable if you run the compiler in a debugger.
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drpriver 2025-04-09 16:18:49 -07:00 • committed by GitHub
parent 74cdfed9d6
commit 93b0317cc3
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1 changed files with 13 additions and 6 deletions
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19
compiler/src/dmd/link.d
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@ -39,6 +39,7 @@ version (Posix)
import core.sys.posix.stdio; import core.sys.posix.stdio;
import core.sys.posix.stdlib; import core.sys.posix.stdlib;
import core.sys.posix.unistd; import core.sys.posix.unistd;
import core.stdc.errno;
extern (C) extern (C)
{ {
@ -1229,13 +1230,19 @@ public int runPreprocessor(Loc loc, const(char)[] cpp, const(char)[] filename, c
OutBuffer buffer; OutBuffer buffer;
ubyte[1024] tmp = void; ubyte[1024] tmp = void;
ptrdiff_t nread; ptrdiff_t nread;
while ((nread = read(pipefd[0], tmp.ptr, tmp.length)) > 0) for(;;)
buffer.write(tmp[0 .. nread]);
if (nread == -1)
{ {
perror("read"); while ((nread = read(pipefd[0], tmp.ptr, tmp.length)) > 0)
return STATUS_FAILED; buffer.write(tmp[0 .. nread]);
if (nread == -1)
{
if(errno == EINTR) continue;
perror("read");
return STATUS_FAILED;
}
break;
} }
int status; int status;