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From 883f24cb32f6373291985ab9c079bcf44dbdcc58 Mon Sep 17 00:00:00 2001
From: Remi Rampin <remi@rampin.org>
Date: Mon, 25 Nov 2024 17:05:16 -0500
Subject: [PATCH 1/2] Grow the path buffer when reading /proc/.../maps
---
native/tracer.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
--- a/native/tracer.c
+++ b/native/tracer.c
@@ -231,7 +231,9 @@
char dummy;
char *line = NULL;
size_t length = 0;
- char previous_path[4096] = "";
+ size_t previous_path_size = 4096;
+ char *previous_path = malloc(previous_path_size);
+ previous_path[0] = 0;
const char *const fmt = "/proc/%d/maps";
int len = snprintf(&dummy, 1, fmt, tid);
@@ -301,7 +303,7 @@
if(inode > 0)
{
if(strcmp(pathname, binary) != 0
- && strncmp(pathname, previous_path, 4096) != 0)
+ && strcmp(pathname, previous_path) != 0)
{
#ifdef DEBUG_PROC_PARSER
log_info(tid, " adding to database");
@@ -309,11 +311,22 @@
if(db_add_file_open(process, pathname,
FILE_READ, path_is_dir(pathname)) != 0)
return -1;
- strncpy(previous_path, pathname, 4096);
+ {
+ size_t needed_size = strlen(pathname) + 1;
+ if(needed_size > previous_path_size) {
+ while(needed_size > previous_path_size) {
+ previous_path_size *= 2;
+ }
+ free(previous_path);
+ previous_path = malloc(previous_path_size);
+ }
+ }
+ strcpy(previous_path, pathname);
}
}
}
fclose(fp);
+ free(previous_path);
return 0;
}
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