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Allocate JsonLexContexts on the heap to avoid warnings

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The stack allocated JsonLexContexts, in combination with codepaths
using goto, were causing warnings when compiling with LTO enabled
as the optimizer is unable to figure out that is safe.  Rather than
contort the code with workarounds for this simply heap allocate the
structs instead as these are not in any performance critical paths.

Author: Daniel Gustafsson <daniel@yesql.se>
Reported-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Jacob Champion <jacob.champion@enterprisedb.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/2074634.1744839761@sss.pgh.pa.us
This commit is contained in:
Daniel Gustafsson
2025-04-23 11:02:05 +02:00
parent 0ff95e0a5b
commit 994a100b37
2 changed files with 20 additions and 15 deletions
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23
src/test/modules/test_json_parser/test_json_parser_incremental.c
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@@ -84,7 +84,7 @@ main(int argc, char **argv)
char buff[BUFSIZE];
FILE *json_file;
JsonParseErrorType result;
JsonLexContext lex;
JsonLexContext *lex;
StringInfoData json;
int n_read;
size_t chunk_size = DEFAULT_CHUNK_SIZE;
@@ -98,6 +98,10 @@ main(int argc, char **argv)
pg_logging_init(argv[0]);
lex = calloc(1, sizeof(JsonLexContext));
if (!lex)
pg_fatal("out of memory");
while ((c = getopt(argc, argv, "c:os")) != -1)
{
switch (c)
@@ -113,7 +117,7 @@ main(int argc, char **argv)
case 's': /* do semantic processing */
testsem = &sem;
sem.semstate = palloc(sizeof(struct DoState));
((struct DoState *) sem.semstate)->lex = &lex;
((struct DoState *) sem.semstate)->lex = lex;
((struct DoState *) sem.semstate)->buf = makeStringInfo();
need_strings = true;
break;
@@ -131,8 +135,8 @@ main(int argc, char **argv)
exit(1);
}
makeJsonLexContextIncremental(&lex, PG_UTF8, need_strings);
setJsonLexContextOwnsTokens(&lex, lex_owns_tokens);
makeJsonLexContextIncremental(lex, PG_UTF8, need_strings);
setJsonLexContextOwnsTokens(lex, lex_owns_tokens);
initStringInfo(&json);
if ((json_file = fopen(testfile, PG_BINARY_R)) == NULL)
@@ -165,12 +169,12 @@ main(int argc, char **argv)
bytes_left -= n_read;
if (bytes_left > 0)
{
result = pg_parse_json_incremental(&lex, testsem,
result = pg_parse_json_incremental(lex, testsem,
json.data, n_read,
false);
if (result != JSON_INCOMPLETE)
{
fprintf(stderr, "%s\n", json_errdetail(result, &lex));
fprintf(stderr, "%s\n", json_errdetail(result, lex));
ret = 1;
goto cleanup;
}
@@ -178,12 +182,12 @@ main(int argc, char **argv)
}
else
{
result = pg_parse_json_incremental(&lex, testsem,
result = pg_parse_json_incremental(lex, testsem,
json.data, n_read,
true);
if (result != JSON_SUCCESS)
{
fprintf(stderr, "%s\n", json_errdetail(result, &lex));
fprintf(stderr, "%s\n", json_errdetail(result, lex));
ret = 1;
goto cleanup;
}
@@ -195,8 +199,9 @@ main(int argc, char **argv)
cleanup:
fclose(json_file);
freeJsonLexContext(&lex);
freeJsonLexContext(lex);
free(json.data);
free(lex);
return ret;
}