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linux-pinenote/tools/perf/arch/x86/util/unwind.c

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perf tools: Support for DWARF CFI unwinding on post processing This brings the support for DWARF cfi unwinding on perf post processing. Call frame informations are retrieved and then passed to libunwind that requests memory and register content from the applications. Adding unwind object to handle the user stack backtrace based on the user register values and user stack dump. The unwind object access the libunwind via remote interface and provides to it all the necessary data to unwind the stack. The unwind interface provides following function: unwind__get_entries And callback (specified in above function) to retrieve the backtrace entries: typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg); Signed-off-by: Jiri Olsa <jolsa@redhat.com> Original-patch-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "Frank Ch. Eigler" <fche@redhat.com> Cc: Arun Sharma <asharma@fb.com> Cc: Benjamin Redelings <benjamin.redelings@nescent.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Ulrich Drepper <drepper@gmail.com> Link: http://lkml.kernel.org/r/1344345647-11536-12-git-send-email-jolsa@redhat.com [ Replaced use of perf_session by usage of perf_evsel ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-08-07 15:20:46 +02:00
#include <errno.h>
#include <libunwind.h>
#include "perf_regs.h"
#include "../../util/unwind.h"
tools/perf: Standardize feature support define names to: HAVE_{FEATURE}_SUPPORT Standardize all the feature flags based on the HAVE_{FEATURE}_SUPPORT naming convention: HAVE_ARCH_X86_64_SUPPORT HAVE_BACKTRACE_SUPPORT HAVE_CPLUS_DEMANGLE_SUPPORT HAVE_DWARF_SUPPORT HAVE_ELF_GETPHDRNUM_SUPPORT HAVE_GTK2_SUPPORT HAVE_GTK_INFO_BAR_SUPPORT HAVE_LIBAUDIT_SUPPORT HAVE_LIBELF_MMAP_SUPPORT HAVE_LIBELF_SUPPORT HAVE_LIBNUMA_SUPPORT HAVE_LIBUNWIND_SUPPORT HAVE_ON_EXIT_SUPPORT HAVE_PERF_REGS_SUPPORT HAVE_SLANG_SUPPORT HAVE_STRLCPY_SUPPORT Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/n/tip-u3zvqejddfZhtrbYbfhi3spa@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-09-30 12:07:11 +02:00
#ifdef HAVE_ARCH_X86_64_SUPPORT
perf tools: Support for DWARF CFI unwinding on post processing This brings the support for DWARF cfi unwinding on perf post processing. Call frame informations are retrieved and then passed to libunwind that requests memory and register content from the applications. Adding unwind object to handle the user stack backtrace based on the user register values and user stack dump. The unwind object access the libunwind via remote interface and provides to it all the necessary data to unwind the stack. The unwind interface provides following function: unwind__get_entries And callback (specified in above function) to retrieve the backtrace entries: typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg); Signed-off-by: Jiri Olsa <jolsa@redhat.com> Original-patch-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "Frank Ch. Eigler" <fche@redhat.com> Cc: Arun Sharma <asharma@fb.com> Cc: Benjamin Redelings <benjamin.redelings@nescent.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Ulrich Drepper <drepper@gmail.com> Link: http://lkml.kernel.org/r/1344345647-11536-12-git-send-email-jolsa@redhat.com [ Replaced use of perf_session by usage of perf_evsel ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-08-07 15:20:46 +02:00
int unwind__arch_reg_id(int regnum)
{
int id;
switch (regnum) {
case UNW_X86_64_RAX:
id = PERF_REG_X86_AX;
break;
case UNW_X86_64_RDX:
id = PERF_REG_X86_DX;
break;
case UNW_X86_64_RCX:
id = PERF_REG_X86_CX;
break;
case UNW_X86_64_RBX:
id = PERF_REG_X86_BX;
break;
case UNW_X86_64_RSI:
id = PERF_REG_X86_SI;
break;
case UNW_X86_64_RDI:
id = PERF_REG_X86_DI;
break;
case UNW_X86_64_RBP:
id = PERF_REG_X86_BP;
break;
case UNW_X86_64_RSP:
id = PERF_REG_X86_SP;
break;
case UNW_X86_64_R8:
id = PERF_REG_X86_R8;
break;
case UNW_X86_64_R9:
id = PERF_REG_X86_R9;
break;
case UNW_X86_64_R10:
id = PERF_REG_X86_R10;
break;
case UNW_X86_64_R11:
id = PERF_REG_X86_R11;
break;
case UNW_X86_64_R12:
id = PERF_REG_X86_R12;
break;
case UNW_X86_64_R13:
id = PERF_REG_X86_R13;
break;
case UNW_X86_64_R14:
id = PERF_REG_X86_R14;
break;
case UNW_X86_64_R15:
id = PERF_REG_X86_R15;
break;
case UNW_X86_64_RIP:
id = PERF_REG_X86_IP;
break;
default:
pr_err("unwind: invalid reg id %d\n", regnum);
return -EINVAL;
}
return id;
}
#else
int unwind__arch_reg_id(int regnum)
{
int id;
switch (regnum) {
case UNW_X86_EAX:
id = PERF_REG_X86_AX;
break;
case UNW_X86_EDX:
id = PERF_REG_X86_DX;
break;
case UNW_X86_ECX:
id = PERF_REG_X86_CX;
break;
case UNW_X86_EBX:
id = PERF_REG_X86_BX;
break;
case UNW_X86_ESI:
id = PERF_REG_X86_SI;
break;
case UNW_X86_EDI:
id = PERF_REG_X86_DI;
break;
case UNW_X86_EBP:
id = PERF_REG_X86_BP;
break;
case UNW_X86_ESP:
id = PERF_REG_X86_SP;
break;
case UNW_X86_EIP:
id = PERF_REG_X86_IP;
break;
default:
pr_err("unwind: invalid reg id %d\n", regnum);
return -EINVAL;
}
return id;
}
tools/perf: Standardize feature support define names to: HAVE_{FEATURE}_SUPPORT Standardize all the feature flags based on the HAVE_{FEATURE}_SUPPORT naming convention: HAVE_ARCH_X86_64_SUPPORT HAVE_BACKTRACE_SUPPORT HAVE_CPLUS_DEMANGLE_SUPPORT HAVE_DWARF_SUPPORT HAVE_ELF_GETPHDRNUM_SUPPORT HAVE_GTK2_SUPPORT HAVE_GTK_INFO_BAR_SUPPORT HAVE_LIBAUDIT_SUPPORT HAVE_LIBELF_MMAP_SUPPORT HAVE_LIBELF_SUPPORT HAVE_LIBNUMA_SUPPORT HAVE_LIBUNWIND_SUPPORT HAVE_ON_EXIT_SUPPORT HAVE_PERF_REGS_SUPPORT HAVE_SLANG_SUPPORT HAVE_STRLCPY_SUPPORT Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/n/tip-u3zvqejddfZhtrbYbfhi3spa@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-09-30 12:07:11 +02:00
#endif /* HAVE_ARCH_X86_64_SUPPORT */
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