database/mariadb-columnstore-engine
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fix(memory leaks): MCOL-5791 - get rid of memory leaks in plugin code

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There were numerous memory leaks in plugin's code and associated code.
During typical run of MTR tests it leaked around 65 megabytes of
objects. As a result they may severely affect long-lived connections.

This patch fixes (almost) all leaks found in the plugin. The exceptions
are two leaks associated with SHOW CREATE TABLE columnstore_table and
getting information of columns of columnstore-handled table. These
should be fixed on the server side and work is on the way.
This commit is contained in:
Serguey Zefirov
2024-09-30 14:50:35 +03:00
committed by Sergey Zefirov
parent 6445f4dff3
commit 38fd96a663
31 changed files with 472 additions and 229 deletions
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8
dbcon/ddlpackage/ddl.l
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@ -34,7 +34,7 @@ int ddldebug = 0;
int lineno = 1;
void ddlerror(struct pass_to_bison* x, char const *s);
static char* scanner_copy(char *str, yyscan_t yyscanner, copy_action_t action = NOOP );
static char* scanner_copy(const char *str, yyscan_t yyscanner, copy_action_t action = NOOP );
%}
@ -115,9 +115,9 @@ CONSTRAINT {return CONSTRAINT;}
CONSTRAINTS {return CONSTRAINTS;}
CREATE {return CREATE;}
CURRENT_USER {return CURRENT_USER;}
DATE {ddlget_lval(yyscanner)->str=strdup("date"); return DATE;}
DATE {ddlget_lval(yyscanner)->str = scanner_copy("date", yyscanner); return DATE;}
DATETIME {return DATETIME;}
TIME {ddlget_lval(yyscanner)->str=strdup("time"); return TIME;}
TIME {ddlget_lval(yyscanner)->str = scanner_copy("time", yyscanner); return TIME;}
TIMESTAMP {return TIMESTAMP;}
DECIMAL {return DECIMAL;}
DEC {return DECIMAL;}
@ -276,7 +276,7 @@ void scanner_finish(yyscan_t yyscanner)
pScanData->valbuf.clear();
}
char* scanner_copy (char *str, yyscan_t yyscanner, copy_action_t action)
char* scanner_copy (const char *str, yyscan_t yyscanner, copy_action_t action)
{
char* result;
char* nv = strdup(str);