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598b7c6919
This patch adds source line information support to perf for jitted code. The source line info must be emitted by the runtime, such as JVMTI. Perf injects extract the source line info from the jitdump file and adds the corresponding .debug_lines section in the ELF image generated for each jitted function. The source line enables matching any address in the profile with a source file and line number. The improvement is visible in perf annotate with the source code displayed alongside the assembly code. The dwarf code leverages the support from OProfile which is also released under GPLv2. Copyright 2007 OProfile authors. Signed-off-by: Stephane Eranian <eranian@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Carl Love <cel@us.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John McCutchan <johnmccutchan@google.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sonny Rao <sonnyrao@chromium.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1448874143-7269-5-git-send-email-eranian@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
#ifndef __GENELF_H__
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#define __GENELF_H__
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/* genelf.c */
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extern int jit_write_elf(int fd, uint64_t code_addr, const char *sym,
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const void *code, int csize,
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void *debug, int nr_debug_entries);
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/* genelf_debug.c */
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extern int jit_add_debug_info(Elf *e, uint64_t code_addr,
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void *debug, int nr_debug_entries);
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#if defined(__arm__)
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#define GEN_ELF_ARCH EM_ARM
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#define GEN_ELF_ENDIAN ELFDATA2LSB
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#define GEN_ELF_CLASS ELFCLASS32
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#elif defined(__aarch64__)
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#define GEN_ELF_ARCH EM_AARCH64
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#define GEN_ELF_ENDIAN ELFDATA2LSB
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#define GEN_ELF_CLASS ELFCLASS64
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#elif defined(__x86_64__)
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#define GEN_ELF_ARCH EM_X86_64
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#define GEN_ELF_ENDIAN ELFDATA2LSB
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#define GEN_ELF_CLASS ELFCLASS64
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#elif defined(__i386__)
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#define GEN_ELF_ARCH EM_386
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#define GEN_ELF_ENDIAN ELFDATA2LSB
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#define GEN_ELF_CLASS ELFCLASS32
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#elif defined(__ppcle__)
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#define GEN_ELF_ARCH EM_PPC
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#define GEN_ELF_ENDIAN ELFDATA2LSB
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#define GEN_ELF_CLASS ELFCLASS64
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#elif defined(__powerpc__)
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#define GEN_ELF_ARCH EM_PPC64
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#define GEN_ELF_ENDIAN ELFDATA2MSB
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#define GEN_ELF_CLASS ELFCLASS64
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#elif defined(__powerpcle__)
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#define GEN_ELF_ARCH EM_PPC64
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#define GEN_ELF_ENDIAN ELFDATA2LSB
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#define GEN_ELF_CLASS ELFCLASS64
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#else
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#error "unsupported architecture"
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#endif
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#if GEN_ELF_CLASS == ELFCLASS64
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#define elf_newehdr elf64_newehdr
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#define elf_getshdr elf64_getshdr
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#define Elf_Ehdr Elf64_Ehdr
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#define Elf_Shdr Elf64_Shdr
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#define Elf_Sym Elf64_Sym
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#define ELF_ST_TYPE(a) ELF64_ST_TYPE(a)
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#define ELF_ST_BIND(a) ELF64_ST_BIND(a)
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#define ELF_ST_VIS(a) ELF64_ST_VISIBILITY(a)
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#else
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#define elf_newehdr elf32_newehdr
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#define elf_getshdr elf32_getshdr
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#define Elf_Ehdr Elf32_Ehdr
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#define Elf_Shdr Elf32_Shdr
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#define Elf_Sym Elf32_Sym
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#define ELF_ST_TYPE(a) ELF32_ST_TYPE(a)
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#define ELF_ST_BIND(a) ELF32_ST_BIND(a)
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#define ELF_ST_VIS(a) ELF32_ST_VISIBILITY(a)
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#endif
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/* The .text section is directly after the ELF header */
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#define GEN_ELF_TEXT_OFFSET sizeof(Elf_Ehdr)
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#endif
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