src/jdk.hotspot.agent/linux/native/libsaproc/salibelf.c

*** 1,7 ****
  /*
!  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 122,126 ****
--- 122,155 ----
  
  quit:
    if (phbuf) free(phbuf);
    return baseaddr;
  }
+ 
+ struct elf_section *find_section_by_name(char *name,
+                                          int fd,
+                                          ELF_EHDR *ehdr,
+                                          struct elf_section *scn_cache) {
+   char *strtab;
+   int cnt;
+   int strtab_size;
+ 
+   // Section cache have to already contain data for e_shstrndx section.
+   // If it's not true - elf file is broken, so just bail out
+   if (scn_cache[ehdr->e_shstrndx].c_data == NULL) {
+     return NULL;
+   }
+ 
+   strtab = scn_cache[ehdr->e_shstrndx].c_data;
+   strtab_size = scn_cache[ehdr->e_shstrndx].c_shdr->sh_size;
+ 
+   for (cnt = 0; cnt < ehdr->e_shnum; ++cnt) {
+     if (scn_cache[cnt].c_shdr->sh_name < strtab_size) {
+       if (strcmp(scn_cache[cnt].c_shdr->sh_name + strtab, name) == 0) {
+         scn_cache[cnt].c_data = read_section_data(fd, ehdr, scn_cache[cnt].c_shdr);
+         return &scn_cache[cnt];
+       }
+     }
+   }
+ 
+   return NULL;
+ }