[Crash-utility] [PATCH 1/3] Add a rustfilt command to demangle a mangled Rust symbol
For example:
crash> rustfilt _RNvXsh_NtCskljHLvcz3xy_4core3fmteNtB5_7Display3fmt
<str as core::fmt::Display>::fmt
Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com>
---
defs.h | 2 ++
global_data.c | 1 +
help.c | 10 ++++++++++
symbols.c | 33 +++++++++++++++++++++++++++++++++
4 files changed, 46 insertions(+)
diff --git a/defs.h b/defs.h
index 4fecb8388229..156ac0232906 100644
--- a/defs.h
+++ b/defs.h
@@ -5508,6 +5508,7 @@ void cmd_s390dbf(void);
#endif
void cmd_map(void); /* kvmdump.c */
void cmd_ipcs(void); /* ipcs.c */
+void cmd_rustfilt(void); /* symbols.c */
/*
* main.c
@@ -6115,6 +6116,7 @@ extern char *help_wr[];
extern char *help_s390dbf[];
#endif
extern char *help_map[];
+extern char *help_rustfilt[];
/*
* task.c
diff --git a/global_data.c b/global_data.c
index f9bb7d079f51..889103d35f82 100644
--- a/global_data.c
+++ b/global_data.c
@@ -125,6 +125,7 @@ struct command_table_entry linux_command_table[] = {
#if defined(S390) || defined(S390X)
{"s390dbf", cmd_s390dbf, help_s390dbf, 0},
#endif
+ {"rustfilt", cmd_rustfilt, help_rustfilt, MINIMAL},
{(char *)NULL}
};
diff --git a/help.c b/help.c
index 5d61e0d57229..4f071e0bd0a0 100644
--- a/help.c
+++ b/help.c
@@ -8186,6 +8186,16 @@ char *help_net[] = {
NULL
};
+char *help_rustfilt[] = {
+"rustfilt",
+"demangle a mangled Rust symbol to human readable symbol",
+"<symbol>",
+" This command converts a mangled Rust symbol to human readable symbol.",
+"\nEXAMPLES",
+" crash> rustfilt _RNvNtCshc5sK6KjdJJ_6kernel5print11call_printk",
+" kernel::print::call_printk",
+NULL
+};
char *help_waitq[] = {
"waitq",
diff --git a/symbols.c b/symbols.c
index 794519ad4126..052196265be0 100644
--- a/symbols.c
+++ b/symbols.c
@@ -22,6 +22,7 @@
#include "config.h"
#endif
#include "bfd.h"
+#include "demangle.h"
static void store_symbols(bfd *, int, void *, long, unsigned int);
static void store_sysmap_symbols(void);
@@ -4887,6 +4888,38 @@ do_multiples:
cmd_usage(pc->curcmd, SYNOPSIS);
}
+/*
+ * Demangle a mangled Rust symbol to human readable symbol
+ */
+void cmd_rustfilt(void)
+{
+ int c;
+
+ while ((c = getopt(argcnt, args, "")) != EOF) {
+ switch(c)
+ {
+ default:
+ argerrs++;
+ break;
+ }
+ }
+
+ if (argerrs)
+ cmd_usage(pc->curcmd, SYNOPSIS);
+
+ if (args[optind]) {
+ char *buf;
+
+ buf = rust_demangle(args[optind], DMGL_RUST);
+ if (buf) {
+ fprintf(fp, "%s", buf);
+ free(buf);
+ } else
+ fprintf(fp, "Not a rust symbol: \n%s", args[optind]);
+ } else
+ cmd_usage(pc->curcmd, SYNOPSIS);
+}
+
/*
* Common symbol display for cmd_sym().
*/
--
2.50.1