Mercurial > hg > truffle
annotate agent/src/os/linux/salibelf.c @ 3011:f00918f35c7f
inlining and runtime interface related changes:
added codeSize() and compilerStorage() to RiMethod
HotSpotMethodResolved uses reflective methods instead of vmIds and survives compilations
HotSpotResolvedType.isInitialized not represented as field (can change)
inlining stores graphs into method objects and reuses them
| author | Lukas Stadler <lukas.stadler@jku.at> |
|---|---|
| date | Thu, 16 Jun 2011 20:36:17 +0200 |
| parents | c18cbe5936b8 |
| children | f2512d89ad0c |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 #include "salibelf.h" | |
| 26 #include <stdlib.h> | |
| 27 #include <unistd.h> | |
| 28 | |
| 29 extern void print_debug(const char*,...); | |
| 30 | |
| 31 // ELF file parsing helpers. Note that we do *not* use libelf here. | |
| 32 int read_elf_header(int fd, ELF_EHDR* ehdr) { | |
| 33 if (pread(fd, ehdr, sizeof (ELF_EHDR), 0) != sizeof (ELF_EHDR) || | |
| 34 memcmp(&ehdr->e_ident[EI_MAG0], ELFMAG, SELFMAG) != 0 || | |
| 35 ehdr->e_version != EV_CURRENT) { | |
| 36 return 0; | |
| 37 } | |
| 38 return 1; | |
| 39 } | |
| 40 | |
| 41 bool is_elf_file(int fd) { | |
| 42 ELF_EHDR ehdr; | |
| 43 return read_elf_header(fd, &ehdr); | |
| 44 } | |
| 45 | |
| 46 // read program header table of an ELF file | |
| 47 ELF_PHDR* read_program_header_table(int fd, ELF_EHDR* hdr) { | |
| 48 ELF_PHDR* phbuf = 0; | |
| 49 // allocate memory for program header table | |
| 50 size_t nbytes = hdr->e_phnum * hdr->e_phentsize; | |
| 51 | |
| 52 if ((phbuf = (ELF_PHDR*) malloc(nbytes)) == NULL) { | |
| 53 print_debug("can't allocate memory for reading program header table\n"); | |
| 54 return NULL; | |
| 55 } | |
| 56 | |
| 57 if (pread(fd, phbuf, nbytes, hdr->e_phoff) != nbytes) { | |
| 58 print_debug("ELF file is truncated! can't read program header table\n"); | |
| 59 free(phbuf); | |
| 60 return NULL; | |
| 61 } | |
| 62 | |
| 63 return phbuf; | |
| 64 } | |
| 65 | |
| 66 // read section header table of an ELF file | |
| 67 ELF_SHDR* read_section_header_table(int fd, ELF_EHDR* hdr) { | |
| 68 ELF_SHDR* shbuf = 0; | |
| 69 // allocate memory for section header table | |
| 70 size_t nbytes = hdr->e_shnum * hdr->e_shentsize; | |
| 71 | |
| 72 if ((shbuf = (ELF_SHDR*) malloc(nbytes)) == NULL) { | |
| 73 print_debug("can't allocate memory for reading section header table\n"); | |
| 74 return NULL; | |
| 75 } | |
| 76 | |
| 77 if (pread(fd, shbuf, nbytes, hdr->e_shoff) != nbytes) { | |
| 78 print_debug("ELF file is truncated! can't read section header table\n"); | |
| 79 free(shbuf); | |
| 80 return NULL; | |
| 81 } | |
| 82 | |
| 83 return shbuf; | |
| 84 } | |
| 85 | |
| 86 // read a particular section's data | |
| 87 void* read_section_data(int fd, ELF_EHDR* ehdr, ELF_SHDR* shdr) { | |
| 88 void *buf = NULL; | |
| 89 if (shdr->sh_type == SHT_NOBITS || shdr->sh_size == 0) { | |
| 90 return buf; | |
| 91 } | |
| 92 if ((buf = calloc(shdr->sh_size, 1)) == NULL) { | |
| 93 print_debug("can't allocate memory for reading section data\n"); | |
| 94 return NULL; | |
| 95 } | |
| 96 if (pread(fd, buf, shdr->sh_size, shdr->sh_offset) != shdr->sh_size) { | |
| 97 free(buf); | |
| 98 print_debug("section data read failed\n"); | |
| 99 return NULL; | |
| 100 } | |
| 101 return buf; | |
| 102 } | |
| 103 | |
| 104 uintptr_t find_base_address(int fd, ELF_EHDR* ehdr) { | |
| 105 uintptr_t baseaddr = (uintptr_t)-1; | |
| 106 int cnt; | |
| 107 ELF_PHDR *phbuf, *phdr; | |
| 108 | |
| 109 // read program header table | |
| 110 if ((phbuf = read_program_header_table(fd, ehdr)) == NULL) { | |
| 111 goto quit; | |
| 112 } | |
| 113 | |
| 114 // the base address of a shared object is the lowest vaddr of | |
| 115 // its loadable segments (PT_LOAD) | |
| 116 for (phdr = phbuf, cnt = 0; cnt < ehdr->e_phnum; cnt++, phdr++) { | |
| 117 if (phdr->p_type == PT_LOAD && phdr->p_vaddr < baseaddr) { | |
| 118 baseaddr = phdr->p_vaddr; | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 quit: | |
| 123 if (phbuf) free(phbuf); | |
| 124 return baseaddr; | |
| 125 } |