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[PULL 41/57] oslib: do not call g_strdup from qemu_get_exec_dir
From: |
Paolo Bonzini |
Subject: |
[PULL 41/57] oslib: do not call g_strdup from qemu_get_exec_dir |
Date: |
Sat, 19 Sep 2020 11:59:00 -0400 |
Just return the directory without requiring the caller to free it.
This also removes a bogus check for NULL in os_find_datadir and
module_load_one; g_strdup of a static variable cannot return NULL.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
include/qemu/osdep.h | 8 ++------
os-posix.c | 6 +-----
os-win32.c | 2 +-
tests/qtest/fuzz/fuzz.c | 4 ++--
util/module.c | 7 +------
util/oslib-posix.c | 8 +++++---
util/oslib-win32.c | 12 ++++++++----
7 files changed, 20 insertions(+), 27 deletions(-)
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 412962d91a..db2cfffaff 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -590,12 +590,8 @@ char *qemu_get_local_state_pathname(const char
*relative_pathname);
* Try OS specific API first, if not working, parse from argv0. */
void qemu_init_exec_dir(const char *argv0);
-/* Get the saved exec dir.
- *
- * The caller is responsible for releasing the value returned with g_free()
- * after use.
- */
-char *qemu_get_exec_dir(void);
+/* Get the saved exec dir. */
+const char *qemu_get_exec_dir(void);
/**
* qemu_getauxval:
diff --git a/os-posix.c b/os-posix.c
index bf98508b6d..8d8e7fc15c 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -90,13 +90,9 @@ void os_setup_signal_handling(void)
*/
char *os_find_datadir(void)
{
- g_autofree char *exec_dir = NULL;
g_autofree char *dir = NULL;
- exec_dir = qemu_get_exec_dir();
- g_return_val_if_fail(exec_dir != NULL, NULL);
-
- dir = g_build_filename(exec_dir, "pc-bios", NULL);
+ dir = g_build_filename(qemu_get_exec_dir(), "pc-bios", NULL);
if (g_file_test(dir, G_FILE_TEST_IS_DIR)) {
return g_steal_pointer(&dir);
}
diff --git a/os-win32.c b/os-win32.c
index c9c3afe648..eb8501b9e5 100644
--- a/os-win32.c
+++ b/os-win32.c
@@ -65,7 +65,7 @@ void os_setup_early_signal_handling(void)
*/
char *os_find_datadir(void)
{
- return qemu_get_exec_dir();
+ return g_strdup(qemu_get_exec_dir());
}
void os_set_line_buffering(void)
diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c
index 1ceea84702..e906ef9efa 100644
--- a/tests/qtest/fuzz/fuzz.c
+++ b/tests/qtest/fuzz/fuzz.c
@@ -143,7 +143,8 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char
***envp)
{
char *target_name;
- char *bindir, *datadir;
+ const char *bindir;
+ char *datadir;
bool serialize = false;
/* Initialize qgraph and modules */
@@ -166,7 +167,6 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char
***envp)
*/
bindir = g_path_get_dirname(**argv);
datadir = g_build_filename(bindir, "pc-bios", NULL);
- g_free(bindir);
if (g_file_test(datadir, G_FILE_TEST_IS_DIR)) {
qemu_add_data_dir(datadir);
}
diff --git a/util/module.c b/util/module.c
index 34772e7d87..9ffe83bb32 100644
--- a/util/module.c
+++ b/util/module.c
@@ -172,7 +172,6 @@ bool module_load_one(const char *prefix, const char
*lib_name)
#ifdef CONFIG_MODULES
char *fname = NULL;
- char *exec_dir;
#ifdef CONFIG_MODULE_UPGRADES
char *version_dir;
#endif
@@ -199,13 +198,12 @@ bool module_load_one(const char *prefix, const char
*lib_name)
return true;
}
- exec_dir = qemu_get_exec_dir();
search_dir = getenv("QEMU_MODULE_DIR");
if (search_dir != NULL) {
dirs[n_dirs++] = g_strdup_printf("%s", search_dir);
}
dirs[n_dirs++] = g_strdup_printf("%s", CONFIG_QEMU_MODDIR);
- dirs[n_dirs++] = g_strdup_printf("%s", exec_dir ? : "");
+ dirs[n_dirs++] = g_strdup(qemu_get_exec_dir());
#ifdef CONFIG_MODULE_UPGRADES
version_dir = g_strcanon(g_strdup(QEMU_PKGVERSION),
@@ -216,9 +214,6 @@ bool module_load_one(const char *prefix, const char
*lib_name)
assert(n_dirs <= ARRAY_SIZE(dirs));
- g_free(exec_dir);
- exec_dir = NULL;
-
for (i = 0; i < n_dirs; i++) {
fname = g_strdup_printf("%s/%s%s",
dirs[i], module_name, CONFIG_HOST_DSOSUF);
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index ad8001a4ad..0dd8d24076 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -366,7 +366,9 @@ void qemu_init_exec_dir(const char *argv0)
char *p = NULL;
char buf[PATH_MAX];
- assert(!exec_dir[0]);
+ if (exec_dir[0]) {
+ return;
+ }
#if defined(__linux__)
{
@@ -439,9 +441,9 @@ void qemu_init_exec_dir(const char *argv0)
g_free(dir);
}
-char *qemu_get_exec_dir(void)
+const char *qemu_get_exec_dir(void)
{
- return g_strdup(exec_dir);
+ return exec_dir;
}
static void sigbus_handler(int signal)
diff --git a/util/oslib-win32.c b/util/oslib-win32.c
index c654dafd93..1a33912944 100644
--- a/util/oslib-win32.c
+++ b/util/oslib-win32.c
@@ -315,7 +315,7 @@ void qemu_set_tty_echo(int fd, bool echo)
}
}
-static char exec_dir[PATH_MAX];
+static char *exec_dir;
void qemu_init_exec_dir(const char *argv0)
{
@@ -324,6 +324,10 @@ void qemu_init_exec_dir(const char *argv0)
char buf[MAX_PATH];
DWORD len;
+ if (exec_dir) {
+ return;
+ }
+
len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
if (len == 0) {
return;
@@ -336,13 +340,13 @@ void qemu_init_exec_dir(const char *argv0)
}
*p = 0;
if (access(buf, R_OK) == 0) {
- pstrcpy(exec_dir, sizeof(exec_dir), buf);
+ exec_dir = g_strdup(buf);
}
}
-char *qemu_get_exec_dir(void)
+const char *qemu_get_exec_dir(void)
{
- return g_strdup(exec_dir);
+ return exec_dir;
}
#if !GLIB_CHECK_VERSION(2, 50, 0)
--
2.26.2
- [PULL 32/57] meson: move libmpathpersist test, (continued)
- [PULL 32/57] meson: move libmpathpersist test, Paolo Bonzini, 2020/09/19
- [PULL 47/57] net: relocate paths to helpers and scripts, Paolo Bonzini, 2020/09/19
- [PULL 35/57] configure: fix --meson=/path/to/meson, Paolo Bonzini, 2020/09/19
- [PULL 52/57] ui: relocate paths to icons and translations, Paolo Bonzini, 2020/09/19
- [PULL 18/57] hw/mips/mipssim: Use MMIO serial device on fake ISA I/O, Paolo Bonzini, 2020/09/19
- [PULL 40/57] meson: report accelerator support, Paolo Bonzini, 2020/09/19
- [PULL 53/57] configure: use a platform-neutral prefix, Paolo Bonzini, 2020/09/19
- [PULL 20/57] configure: rename QEMU_GA_MSI_ENABLED to CONFIG_QGA_MSI, Paolo Bonzini, 2020/09/19
- [PULL 22/57] hw/char/serial: Replace commented DPRINTF() by trace event, Paolo Bonzini, 2020/09/19
- [PULL 25/57] hw/char/serial: Make 'wakeup' property boolean, Paolo Bonzini, 2020/09/19
- [PULL 41/57] oslib: do not call g_strdup from qemu_get_exec_dir,
Paolo Bonzini <=
- [PULL 56/57] checkpatch: avoid error on cover letter files, Paolo Bonzini, 2020/09/19
- [PULL 38/57] meson: qtest: set "depends" correctly, Paolo Bonzini, 2020/09/19
- [PULL 44/57] cutils: introduce get_relocated_path, Paolo Bonzini, 2020/09/19
- [PULL 34/57] configure: move malloc_trim/tcmalloc/jemalloc to meson, Paolo Bonzini, 2020/09/19
- [PULL 33/57] meson: extend libmpathpersist test for static linking, Paolo Bonzini, 2020/09/19
- [PULL 39/57] mtest2make: add support for introspected test dependencies, Paolo Bonzini, 2020/09/19
- [PULL 36/57] configure: move cocoa option to Meson, Paolo Bonzini, 2020/09/19
- [PULL 50/57] qemu-bridge-helper: relocate path to default ACL, Paolo Bonzini, 2020/09/19
- [PULL 54/57] hw/i386/q35: Remove unreachable Xen code on Q35 machine, Paolo Bonzini, 2020/09/19
- [PULL 49/57] vl: relocate path to configuration file, Paolo Bonzini, 2020/09/19