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listing: make it possible to flush the listing output after every line

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Add the -Lw option to flush the list file after every line
output. This is handy for debugging if nasm hangs.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin (Intel) 2019-10-23 12:45:08 -07:00
parent 4b58ec1b8f
commit 0741eb6004
4 changed files with 27 additions and 3 deletions
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7
asm/listing.c
View File

@ -148,6 +148,8 @@ static void list_cleanup(void)
static void list_init(const char *fname)
{
enum file_flags flags = NF_TEXT;
if (listfp)
list_cleanup();
@ -156,7 +158,10 @@ static void list_init(const char *fname)
return;
}
listfp = nasm_open_write(fname, NF_TEXT);
if (list_option('w'))
flags |= NF_IOLBF;
listfp = nasm_open_write(fname, flags);
if (!listfp) {
nasm_nonfatal("unable to open listing file `%s'", fname);
return;

1
asm/nasm.c
View File

@ -2067,6 +2067,7 @@ static void help(FILE *out)
" -Lm show multi-line macro calls with expanded parmeters\n"
" -Lp output a list file every pass, in case of errors\n"
" -Ls show all single-line macro definitions\n"
" -Lw flush the output after every line\n"
" -L+ enable all listing options (very verbose!)\n"
"\n"
" -Oflags... optimize opcodes, immediates and branch offsets\n"

8
include/nasmlib.h
View File

@ -1,6 +1,6 @@
/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2018 The NASM Authors - All Rights Reserved
* Copyright 1996-2019 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
@ -355,8 +355,12 @@ enum file_flags {
NF_TEXT = 0x00000001, /* Text file */
NF_NONFATAL = 0x00000000, /* Don't die on open failure (default) */
NF_FATAL = 0x00000002, /* Die on open failure */
NF_FORMAP = 0x00000004 /* Intended to use nasm_map_file() */
NF_FORMAP = 0x00000004, /* Intended to use nasm_map_file() */
NF_IONBF = 0x00000010, /* Force unbuffered stdio */
NF_IOLBF = 0x00000020, /* Force line buffered stdio */
NF_IOFBF = 0000000030 /* Force fully buffered stdio */
};
#define NF_BUF_MASK 0x30
FILE *nasm_open_read(const char *filename, enum file_flags flags);
FILE *nasm_open_write(const char *filename, enum file_flags flags);

14
nasmlib/file.c
View File

@ -210,6 +210,20 @@ FILE *nasm_open_write(const char *filename, enum file_flags flags)
nasm_fatalf(ERR_NOFILE, "unable to open output file: `%s': %s",
filename, strerror(errno));
switch (flags & NF_BUF_MASK) {
case NF_IONBF:
setvbuf(f, NULL, _IONBF, 0);
break;
case NF_IOLBF:
setvbuf(f, NULL, _IOLBF, 0);
break;
case NF_IOFBF:
setvbuf(f, NULL, _IOFBF, 0);
break;
default:
break;
}
return f;
}