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2a28e23049
Intel PT uses TSC as a timestamp, so add support for using TSC instead of the monotonic clock. Use of TSC is selected by an environment variable "JITDUMP_USE_ARCH_TIMESTAMP" and flagged in the jitdump file with flag JITDUMP_FLAGS_ARCH_TIMESTAMP. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1457426330-30226-1-git-send-email-adrian.hunter@intel.com [ Added the fixup from He Kuang to make it build on other arches, ] [ such as aarch64, to avoid inserting this bisectiong breakage upstream ] Link: http://lkml.kernel.org/r/1459482572-129494-1-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
/*
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* jitdump.h: jitted code info encapsulation file format
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*
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* Adapted from OProfile GPLv2 support jidump.h:
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* Copyright 2007 OProfile authors
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* Jens Wilke
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* Daniel Hansel
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* Copyright IBM Corporation 2007
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*/
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#ifndef JITDUMP_H
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#define JITDUMP_H
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#include <sys/time.h>
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#include <time.h>
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#include <stdint.h>
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/* JiTD */
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#define JITHEADER_MAGIC 0x4A695444
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#define JITHEADER_MAGIC_SW 0x4454694A
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#define PADDING_8ALIGNED(x) ((((x) + 7) & 7) ^ 7)
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#define JITHEADER_VERSION 1
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enum jitdump_flags_bits {
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JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT,
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JITDUMP_FLAGS_MAX_BIT,
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};
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#define JITDUMP_FLAGS_ARCH_TIMESTAMP (1ULL << JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT)
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#define JITDUMP_FLAGS_RESERVED (JITDUMP_FLAGS_MAX_BIT < 64 ? \
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(~((1ULL << JITDUMP_FLAGS_MAX_BIT) - 1)) : 0)
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struct jitheader {
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uint32_t magic; /* characters "jItD" */
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uint32_t version; /* header version */
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uint32_t total_size; /* total size of header */
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uint32_t elf_mach; /* elf mach target */
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uint32_t pad1; /* reserved */
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uint32_t pid; /* JIT process id */
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uint64_t timestamp; /* timestamp */
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uint64_t flags; /* flags */
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};
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enum jit_record_type {
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JIT_CODE_LOAD = 0,
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JIT_CODE_MOVE = 1,
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JIT_CODE_DEBUG_INFO = 2,
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JIT_CODE_CLOSE = 3,
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JIT_CODE_MAX,
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};
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/* record prefix (mandatory in each record) */
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struct jr_prefix {
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uint32_t id;
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uint32_t total_size;
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uint64_t timestamp;
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};
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struct jr_code_load {
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struct jr_prefix p;
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uint32_t pid;
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uint32_t tid;
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uint64_t vma;
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uint64_t code_addr;
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uint64_t code_size;
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uint64_t code_index;
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};
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struct jr_code_close {
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struct jr_prefix p;
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};
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struct jr_code_move {
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struct jr_prefix p;
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uint32_t pid;
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uint32_t tid;
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uint64_t vma;
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uint64_t old_code_addr;
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uint64_t new_code_addr;
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uint64_t code_size;
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uint64_t code_index;
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};
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struct debug_entry {
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uint64_t addr;
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int lineno; /* source line number starting at 1 */
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int discrim; /* column discriminator, 0 is default */
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const char name[0]; /* null terminated filename, \xff\0 if same as previous entry */
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};
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struct jr_code_debug_info {
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struct jr_prefix p;
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uint64_t code_addr;
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uint64_t nr_entry;
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struct debug_entry entries[0];
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};
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union jr_entry {
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struct jr_code_debug_info info;
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struct jr_code_close close;
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struct jr_code_load load;
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struct jr_code_move move;
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struct jr_prefix prefix;
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};
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static inline struct debug_entry *
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debug_entry_next(struct debug_entry *ent)
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{
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void *a = ent + 1;
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size_t l = strlen(ent->name) + 1;
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return a + l;
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}
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static inline char *
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debug_entry_file(struct debug_entry *ent)
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{
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void *a = ent + 1;
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return a;
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}
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#endif /* !JITDUMP_H */
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