perf trace: Add beautifier for mmap prot parm

[mirror_ubuntu-focal-kernel.git] / tools / perf / builtin-trace.c

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 60ee811c5129f99fb58818ccc880a5885ee75019..81c20a6cc6b70c0164341cb2999f0d42fd476c40 100644 (file)
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -11,6 +11,7 @@
 
 #include <libaudit.h>
 #include <stdlib.h>
+#include <sys/mman.h>
 
 static size_t syscall_arg__scnprintf_hex(char *bf, size_t size, unsigned long arg)
 {
@@ -19,6 +20,36 @@ static size_t syscall_arg__scnprintf_hex(char *bf, size_t size, unsigned long ar
 
 #define SCA_HEX syscall_arg__scnprintf_hex
 
+static size_t syscall_arg__scnprintf_mmap_prot(char *bf, size_t size, unsigned long arg)
+{
+       int printed = 0, prot = arg;
+
+       if (prot == PROT_NONE)
+               return scnprintf(bf, size, "NONE");
+#define        P_MMAP_PROT(n) \
+       if (prot & PROT_##n) { \
+               printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
+               prot &= ~PROT_##n; \
+       }
+
+       P_MMAP_PROT(EXEC);
+       P_MMAP_PROT(READ);
+       P_MMAP_PROT(WRITE);
+#ifdef PROT_SEM
+       P_MMAP_PROT(SEM);
+#endif
+       P_MMAP_PROT(GROWSDOWN);
+       P_MMAP_PROT(GROWSUP);
+#undef P_MMAP_PROT
+
+       if (prot)
+               printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", prot);
+
+       return printed;
+}
+
+#define SCA_MMAP_PROT syscall_arg__scnprintf_mmap_prot
+
 static struct syscall_fmt {
        const char *name;
        const char *alias;
@@ -40,10 +71,14 @@ static struct syscall_fmt {
          .arg_scnprintf = { [2] = SCA_HEX, /* arg */ }, },
        { .name     = "lstat",      .errmsg = true, .alias = "newlstat", },
        { .name     = "mmap",       .hexret = true,
-         .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
+         .arg_scnprintf = { [0] = SCA_HEX,       /* addr */
+                            [2] = SCA_MMAP_PROT, /* prot */ }, },
        { .name     = "mprotect",   .errmsg = true,
-         .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
-       { .name     = "mremap",     .hexret = true, },
+         .arg_scnprintf = { [0] = SCA_HEX, /* start */
+                            [2] = SCA_MMAP_PROT, /* prot */ }, },
+       { .name     = "mremap",     .hexret = true,
+         .arg_scnprintf = { [0] = SCA_HEX, /* addr */
+                            [4] = SCA_HEX, /* new_addr */ }, },
        { .name     = "munmap",     .errmsg = true,
          .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
        { .name     = "open",       .errmsg = true, },