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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] xl: do not leak cpupool names
# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1346931944 -3600
# Node ID d4d7031eb68bf0ce9bc83901b699cf13a2c73c95
# Parent 1db796c3c0b97bba222f20db543c227e313ec1be
xl: do not leak cpupool names.
Valgrind reports:
==3076== 7 bytes in 1 blocks are definitely lost in loss record 1 of 1
==3076== at 0x402458C: malloc (vg_replace_malloc.c:270)
==3076== by 0x406F86D: libxl_cpupoolid_to_name (libxl_utils.c:102)
==3076== by 0x8058742: parse_config_data (xl_cmdimpl.c:639)
==3076== by 0x805BD56: create_domain (xl_cmdimpl.c:1838)
==3076== by 0x805DAED: main_create (xl_cmdimpl.c:3903)
==3076== by 0x804D39D: main (xl.c:285)
And indeed there are several places where xl uses
libxl_cpupoolid_to_name as a boolean to test if the pool name is
valid and leaks the name if it is. Introduce an is_valid helper and
use that instead.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
This leak is in xl not libxl so this is 4.3 material IMHO.
diff -r 1db796c3c0b9 -r d4d7031eb68b tools/libxl/libxl_utils.c
--- a/tools/libxl/libxl_utils.c Thu Sep 06 12:24:44 2012 +0100
+++ b/tools/libxl/libxl_utils.c Thu Sep 06 12:45:44 2012 +0100
@@ -103,6 +103,17 @@ char *libxl_cpupoolid_to_name(libxl_ctx
return s;
}
+/* This is a bit horrid but without xs_exists it seems like the only way. */
+int libxl_cpupoolid_is_valid(libxl_ctx *ctx, uint32_t poolid)
+{
+ int ret;
+ char *s = libxl_cpupoolid_to_name(ctx, poolid);
+
+ ret = (s != NULL);
+ free(s);
+ return ret;
+}
+
char *libxl__cpupoolid_to_name(libxl__gc *gc, uint32_t poolid)
{
char *s = libxl_cpupoolid_to_name(libxl__gc_owner(gc), poolid);
diff -r 1db796c3c0b9 -r d4d7031eb68b tools/libxl/libxl_utils.h
--- a/tools/libxl/libxl_utils.h Thu Sep 06 12:24:44 2012 +0100
+++ b/tools/libxl/libxl_utils.h Thu Sep 06 12:45:44 2012 +0100
@@ -24,6 +24,7 @@ int libxl_name_to_domid(libxl_ctx *ctx,
char *libxl_domid_to_name(libxl_ctx *ctx, uint32_t domid);
int libxl_name_to_cpupoolid(libxl_ctx *ctx, const char *name, uint32_t
*poolid);
char *libxl_cpupoolid_to_name(libxl_ctx *ctx, uint32_t poolid);
+int libxl_cpupoolid_is_valid(libxl_ctx *ctx, uint32_t poolid);
int libxl_get_stubdom_id(libxl_ctx *ctx, int guest_domid);
int libxl_is_stubdom(libxl_ctx *ctx, uint32_t domid, uint32_t *target_domid);
int libxl_create_logfile(libxl_ctx *ctx, const char *name, char **full_name);
diff -r 1db796c3c0b9 -r d4d7031eb68b tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c Thu Sep 06 12:24:44 2012 +0100
+++ b/tools/libxl/xl_cmdimpl.c Thu Sep 06 12:45:44 2012 +0100
@@ -636,7 +636,7 @@ static void parse_config_data(const char
c_info->poolid = -1;
cpupool_qualifier_to_cpupoolid(buf, &c_info->poolid, NULL);
}
- if (!libxl_cpupoolid_to_name(ctx, c_info->poolid)) {
+ if (!libxl_cpupoolid_is_valid(ctx, c_info->poolid)) {
fprintf(stderr, "Illegal pool specified\n");
exit(1);
}
@@ -4733,7 +4733,7 @@ static int sched_domain_output(libxl_sch
if (cpupool) {
if (cpupool_qualifier_to_cpupoolid(cpupool, &poolid, NULL) ||
- !libxl_cpupoolid_to_name(ctx, poolid)) {
+ !libxl_cpupoolid_is_valid(ctx, poolid)) {
fprintf(stderr, "unknown cpupool \'%s\'\n", cpupool);
return -ERROR_FAIL;
}
@@ -4863,7 +4863,7 @@ int main_sched_credit(int argc, char **a
if (cpupool) {
if (cpupool_qualifier_to_cpupoolid(cpupool, &poolid, NULL) ||
- !libxl_cpupoolid_to_name(ctx, poolid)) {
+ !libxl_cpupoolid_is_valid(ctx, poolid)) {
fprintf(stderr, "unknown cpupool \'%s\'\n", cpupool);
return -ERROR_FAIL;
}
@@ -6290,7 +6290,7 @@ int main_cpupooldestroy(int argc, char *
pool = argv[optind];
if (cpupool_qualifier_to_cpupoolid(pool, &poolid, NULL) ||
- !libxl_cpupoolid_to_name(ctx, poolid)) {
+ !libxl_cpupoolid_is_valid(ctx, poolid)) {
fprintf(stderr, "unknown cpupool \'%s\'\n", pool);
return -ERROR_FAIL;
}
@@ -6311,7 +6311,7 @@ int main_cpupoolrename(int argc, char **
pool = argv[optind++];
if (cpupool_qualifier_to_cpupoolid(pool, &poolid, NULL) ||
- !libxl_cpupoolid_to_name(ctx, poolid)) {
+ !libxl_cpupoolid_is_valid(ctx, poolid)) {
fprintf(stderr, "unknown cpupool \'%s\'\n", pool);
return -ERROR_FAIL;
}
@@ -6348,7 +6348,7 @@ int main_cpupoolcpuadd(int argc, char **
}
if (cpupool_qualifier_to_cpupoolid(pool, &poolid, NULL) ||
- !libxl_cpupoolid_to_name(ctx, poolid)) {
+ !libxl_cpupoolid_is_valid(ctx, poolid)) {
fprintf(stderr, "unknown cpupool \'%s\'\n", pool);
return -ERROR_FAIL;
}
@@ -6392,7 +6392,7 @@ int main_cpupoolcpuremove(int argc, char
}
if (cpupool_qualifier_to_cpupoolid(pool, &poolid, NULL) ||
- !libxl_cpupoolid_to_name(ctx, poolid)) {
+ !libxl_cpupoolid_is_valid(ctx, poolid)) {
fprintf(stderr, "unknown cpupool \'%s\'\n", pool);
return -ERROR_FAIL;
}
@@ -6435,7 +6435,7 @@ int main_cpupoolmigrate(int argc, char *
}
if (cpupool_qualifier_to_cpupoolid(pool, &poolid, NULL) ||
- !libxl_cpupoolid_to_name(ctx, poolid)) {
+ !libxl_cpupoolid_is_valid(ctx, poolid)) {
fprintf(stderr, "unknown cpupool \'%s\'\n", pool);
return -ERROR_FAIL;
}
diff -r 1db796c3c0b9 -r d4d7031eb68b tools/libxl/xl_sxp.c
--- a/tools/libxl/xl_sxp.c Thu Sep 06 12:24:44 2012 +0100
+++ b/tools/libxl/xl_sxp.c Thu Sep 06 12:45:44 2012 +0100
@@ -37,6 +37,7 @@ void printf_info_sexp(int domid, libxl_d
libxl_domain_create_info *c_info = &d_config->c_info;
libxl_domain_build_info *b_info = &d_config->b_info;
+ char *pool;
printf("(domain\n\t(domid %d)\n", domid);
printf("\t(create_info)\n");
@@ -54,8 +55,10 @@ void printf_info_sexp(int domid, libxl_d
} else {
printf("\t(uuid <unknown>)\n");
}
-
- printf("\t(cpupool %s)\n", libxl_cpupoolid_to_name(ctx, c_info->poolid));
+ pool = libxl_cpupoolid_to_name(ctx, c_info->poolid);
+ if (pool)
+ printf("\t(cpupool %s)\n", pool);
+ free(pool);
if (c_info->xsdata)
printf("\t(xsdata contains data)\n");
else
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