#include #include #include "../util/cache.h" #include "../util/debug.h" #include "../util/hist.h" pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER; void *perf_gtk_handle; #ifdef HAVE_GTK2_SUPPORT static int setup_gtk_browser(void) { int (*perf_ui_init)(void); if (perf_gtk_handle) return 0; perf_gtk_handle = dlopen(PERF_GTK_DSO, RTLD_LAZY); if (perf_gtk_handle == NULL) { char buf[PATH_MAX]; scnprintf(buf, sizeof(buf), "%s/%s", LIBDIR, PERF_GTK_DSO); perf_gtk_handle = dlopen(buf, RTLD_LAZY); } if (perf_gtk_handle == NULL) return -1; perf_ui_init = dlsym(perf_gtk_handle, "perf_gtk__init"); if (perf_ui_init == NULL) goto out_close; if (perf_ui_init() == 0) return 0; out_close: dlclose(perf_gtk_handle); return -1; } static void exit_gtk_browser(bool wait_for_ok) { void (*perf_ui_exit)(bool); if (perf_gtk_handle == NULL) return; perf_ui_exit = dlsym(perf_gtk_handle, "perf_gtk__exit"); if (perf_ui_exit == NULL) goto out_close; perf_ui_exit(wait_for_ok); out_close: dlclose(perf_gtk_handle); perf_gtk_handle = NULL; } #else static inline int setup_gtk_browser(void) { return -1; } static inline void exit_gtk_browser(bool wait_for_ok __maybe_unused) {} #endif int stdio__config_color(const struct option *opt __maybe_unused, const char *mode, int unset __maybe_unused) { perf_use_color_default = perf_config_colorbool("color.ui", mode, -1); return 0; } void setup_browser(bool fallback_to_pager) { if (use_browser < 2 && (!isatty(1) || dump_trace)) use_browser = 0; /* default to TUI */ if (use_browser < 0) use_browser = 1; switch (use_browser) { case 2: if (setup_gtk_browser() == 0) break; printf("GTK browser requested but could not find %s\n", PERF_GTK_DSO); sleep(1); /* fall through */ case 1: use_browser = 1; if (ui__init() == 0) break; /* fall through */ default: use_browser = 0; if (fallback_to_pager) setup_pager(); break; } } void exit_browser(bool wait_for_ok) { switch (use_browser) { case 2: exit_gtk_browser(wait_for_ok); break; case 1: ui__exit(wait_for_ok); break; default: break; } } 77d536f'>commitdiff
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authorDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
commit54791b276b4000b307339f269d3bf7db877d536f (patch)
tree1c2616bd373ce5ea28aac2a53e32f5b5834901ce /tools/perf/arch/xtensa
parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)
parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/arch/xtensa')