lkml.org 
[lkml]   [2020]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/3] perf jvmti: Fix jitdump for methods without debug info
Date
If a Java class is compiled with -g:none to omit debug information, the
JVMTI plugin won't write jitdump entries for any method in this class
and prints a lot of errors like:

java: GetSourceFileName failed with JVMTI_ERROR_ABSENT_INFORMATION

The call to GetSourceFileName is used to derive the file name `fn`, but
this value is not actually used since commit ca58d7e64bdf ("perf jvmti:
Generate correct debug information for inlined code") which moved the
file name lookup into fill_source_filenames(). So the call to
GetSourceFileName and related code can be safely removed.

Signed-off-by: Nick Gasson <nick.gasson@arm.com>
---
tools/perf/jvmti/libjvmti.c | 11 -----------
1 file changed, 11 deletions(-)

diff --git a/tools/perf/jvmti/libjvmti.c b/tools/perf/jvmti/libjvmti.c
index c441a34cb1c0..50ef524b5cd4 100644
--- a/tools/perf/jvmti/libjvmti.c
+++ b/tools/perf/jvmti/libjvmti.c
@@ -246,8 +246,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
char *class_sign = NULL;
char *func_name = NULL;
char *func_sign = NULL;
- char *file_name = NULL;
- char fn[PATH_MAX];
uint64_t addr = (uint64_t)(uintptr_t)code_addr;
jvmtiError ret;
int nr_lines = 0; /* in line_tab[] */
@@ -282,12 +280,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
}
}

- ret = (*jvmti)->GetSourceFileName(jvmti, decl_class, &file_name);
- if (ret != JVMTI_ERROR_NONE) {
- print_error(jvmti, "GetSourceFileName", ret);
- goto error;
- }
-
ret = (*jvmti)->GetClassSignature(jvmti, decl_class,
&class_sign, NULL);
if (ret != JVMTI_ERROR_NONE) {
@@ -302,8 +294,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
goto error;
}

- copy_class_filename(class_sign, file_name, fn, PATH_MAX);
-
/*
* write source line info record if we have it
*/
@@ -323,7 +313,6 @@ compiled_method_load_cb(jvmtiEnv *jvmti,
(*jvmti)->Deallocate(jvmti, (unsigned char *)func_name);
(*jvmti)->Deallocate(jvmti, (unsigned char *)func_sign);
(*jvmti)->Deallocate(jvmti, (unsigned char *)class_sign);
- (*jvmti)->Deallocate(jvmti, (unsigned char *)file_name);
free(line_tab);
while (line_file_names && (nr_lines > 0)) {
if (line_file_names[nr_lines - 1]) {
--
2.26.1
\
 
 \ /
  Last update: 2020-04-27 08:17    [W:0.143 / U:0.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site