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addr2line.c: suppress warnings

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* addr2line.c (fill_lines): check file size overflow only if it is
  necessary, and suppress a sign-compare warning.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36758 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2012-08-21 13:32:13 +00:00
parent 75e2a26b84
commit b78fdf1a82
1 changed files with 3 additions and 1 deletions
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4
addr2line.c
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@ -458,11 +458,13 @@ fill_lines(int num_traces, void **traces, char **syms, int check_debuglink,
fprintf(stderr, "lseek: %s\n", strerror(e));
return;
}
if (filesize > SIZE_MAX) {
#if SIZEOF_OFF_T > SIZEOF_SIZE_T
if (filesize > (off_t)SIZE_MAX) {
close(fd);
fprintf(stderr, "Too large file %s\n", binary_filename);
return;
}
#endif
lseek(fd, 0, SEEK_SET);
/* async-signal unsafe */
file = (char *)mmap(NULL, (size_t)filesize, PROT_READ, MAP_SHARED, fd, 0);