diff options
Diffstat (limited to 'src/atrace/atrace.cpp')
| -rwxr-xr-x | src/atrace/atrace.cpp | 90 |
1 files changed, 1 insertions, 89 deletions
diff --git a/src/atrace/atrace.cpp b/src/atrace/atrace.cpp index fff7369..2639795 100755 --- a/src/atrace/atrace.cpp +++ b/src/atrace/atrace.cpp @@ -33,7 +33,6 @@ #include <sys/file.h> #include <sys/stat.h> #include <sys/smack.h> -#include <linux/xattr.h> #include <unistd.h> #include "ttrace.h" #define TTRACE_TAG_NONE 9999 @@ -53,46 +52,6 @@ typedef enum { OPT, REQ } requiredness ; char str_error[256] = ""; -struct CommonNode { - const char* path; - const mode_t perms; -}; - -typedef enum { - TTRACE_TAG_IDX = 0, - DEBUG_FS_IDX, - TRACING_FS_IDX, - TRACE_MARKER_IDX, - ESSENCE_NODE_IDX -} commonNodeIdx; - -static const CommonNode commonNodes[] = { - { ENABLED_TAG_FILE, 0664 }, - { "/sys/kernel/debug", 0755 }, - { "/sys/kernel/debug/tracing", 0755 }, - { "/sys/kernel/debug/tracing/trace_marker", 0222 }, - { "/sys/kernel/debug/tracing/trace_clock", 0666 }, - { "/sys/kernel/debug/tracing/buffer_size_kb", 0666 }, - { "/sys/kernel/debug/tracing/current_tracer", 0666 }, - { "/sys/kernel/debug/tracing/tracing_on", 0666 }, - { "/sys/kernel/debug/tracing/trace", 0666 }, - { "/sys/kernel/debug/tracing/options/overwrite", 0666 }, - { "/sys/kernel/debug/tracing/options/print-tgid", 0666 }, - { "/sys/kernel/debug/tracing/events/sched/sched_switch/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/sched/sched_wakeup/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/power/cpu_frequency/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/memory_bus/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/power/cpu_idle/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/ext4/ext4_sync_file_enter/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/ext4/ext4_sync_file_exit/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/block/block_rq_issue/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/block/block_rq_complete/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/mmc/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/cpufreq_interactive/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/sync/enable", 0666 }, - { "/sys/kernel/debug/tracing/events/workqueue/enable", 0666 }, -}; - struct TracingCategory { // The name identifying the category. const char* name; @@ -252,39 +211,6 @@ static bool fileIsWritable(const char* filename) { return access(filename, W_OK) != -1; } -static bool setFilePermission (const char *path, const mode_t perms) { - //fprintf(stderr, "path: %s, perms: %d, gid: %d\n", path,perms, group_dev.gr_gid); - if (0 > chown(path, 0, group_dev.gr_gid)) return false; - if (0 > chmod(path, perms)) return false; - if (0 > smack_set_label_for_path(path, XATTR_NAME_SMACK, false, "*")) return false; - - return true; -} - -static bool initSysfsPermission() { - for (int i = TTRACE_TAG_IDX + 1 ; i < NELEM(commonNodes); i++) { - const CommonNode &node = commonNodes[i]; - printf("initsysfsperm: path- %s, perms- %d\n", node.path, node.perms); - if (fileExists(node.path)) { - if (i == DEBUG_FS_IDX || i == TRACING_FS_IDX) { - if(0 > chmod(node.path, node.perms)) - return false; - } - else { - if (!setFilePermission(node.path, node.perms)) - return false; - } - } - else { - if(i < ESSENCE_NODE_IDX) - { - return false; - } - } - } - return true; -} - // Truncate a file. static bool truncateFile(const char* path) { @@ -445,7 +371,6 @@ static bool setTagsProperty(uint64_t tags) { uint64_t *sm_for_enabled_tag = NULL; int fd = -1; - const CommonNode &tag_node = commonNodes[TTRACE_TAG_IDX]; //atrace "--init_exec" mode if(g_init_exec) { @@ -494,13 +419,6 @@ static bool setTagsProperty(uint64_t tags) fprintf(stderr, "Fail to open enabled_tag file: %s(%d)\n", strerror_r(errno, str_error, sizeof(str_error)), errno); return false; } - //set file permission, smack label to "/tmp/tmp_tag" and then change it's name to "/tmp/ttrace_tag" - if (!setFilePermission("/tmp/tmp_tag", tag_node.perms)) - { - fprintf(stderr, "setFilePermission failed(%s): /tmp/tmp_tag\n", strerror_r(errno, str_error, sizeof(str_error))); - close(fd); - return false; - } if (ftruncate(fd, sizeof(uint64_t)) < 0) { fprintf(stderr, "ftruncate() failed(%s)\n", strerror_r(errno, str_error, sizeof(str_error))); @@ -516,15 +434,9 @@ static bool setTagsProperty(uint64_t tags) } //for auto-mounting tracingfs (>= linux 4.1.x) system("/usr/bin/ls -al /sys/kernel/debug/tracing > /dev/null 2>&1"); - if(!initSysfsPermission()) { - fprintf(stderr, "Fail to init sysfs permisions: %s(%d)\n", strerror_r(errno, str_error, sizeof(str_error)), errno); - munmap(sm_for_enabled_tag, sizeof(uint64_t)); - close(fd); - return false; - } memset(sm_for_enabled_tag, 0, sizeof(uint64_t)); - if(-1 == rename("/tmp/tmp_tag", tag_node.path)) { + if(-1 == rename("/tmp/tmp_tag", ENABLED_TAG_FILE)) { fprintf(stderr, "Fail to rename enabled_tag file: %s(%d)\n", strerror_r(errno, str_error, sizeof(str_error)), errno); } |