Libc-1353.11.2.tar.gz

[apple/libc.git] / tests / backtrace.c

diff --git a/tests/backtrace.c b/tests/backtrace.c
index da91023201aa129b43da65274f02905100cadc33..87595fe4628e85e830c547c52d742a716200ab1b 100644 (file)
--- a/tests/backtrace.c
+++ b/tests/backtrace.c
@@ -9,6 +9,7 @@
 
 #define MAX_FRAMES 32
 static const int expected_nframes = 20;
+static const int skip_nframes = 5;
 
 static void *observed_bt[MAX_FRAMES] = {};
 static int observed_nframes = 0;
@@ -23,7 +24,7 @@ recurse_b(unsigned int frames);
 static int __attribute__((noinline,not_tail_called,disable_tail_calls))
 recurse_a(unsigned int frames)
 {
-       if (frames == 1) {
+       if (frames == 0) {
                if (save_fp_at_nframes > 0) {
                        observed_nframes = backtrace_from_fp(save_fp, observed_bt,
                                        MAX_FRAMES);
@@ -41,7 +42,7 @@ recurse_a(unsigned int frames)
 static int __attribute__((noinline,not_tail_called,disable_tail_calls))
 recurse_b(unsigned int frames)
 {
-       if (frames == 1) {
+       if (frames == 0) {
                if (save_fp_at_nframes > 0) {
                        observed_nframes = backtrace_from_fp(save_fp, observed_bt,
                                        MAX_FRAMES);
@@ -57,9 +58,9 @@ recurse_b(unsigned int frames)
 }
 
 static void __attribute__((noinline,not_tail_called,disable_tail_calls))
-setup_and_backtrace(unsigned int nframes, unsigned int skip_nframes)
+setup_and_backtrace(unsigned int nframes, unsigned int skip)
 {
-       save_fp_at_nframes = skip_nframes ? skip_nframes - 1 : 0;
+       save_fp_at_nframes = skip ? skip - 1 : 0;
        recurse_a(nframes - 1);
 }
 
@@ -72,7 +73,7 @@ check_for_setup(int i, struct dl_info *info)
        return info->dli_saddr == setup_fp;
 }
 
-static void __attribute__((noinline))
+static void __attribute__((noinline,not_tail_called))
 expect_backtrace(void)
 {
        void *recurse_a_fp = (void *)&recurse_a;
@@ -83,8 +84,8 @@ expect_backtrace(void)
 
        T_EXPECT_EQ(expected_nframes,
                        observed_nframes - observed_existing_nframes,
-                       "number of frames traced matches");
-       bool expect_a = true;
+                       "number of frames traced matches %d", expected_nframes);
+       bool expect_a = !(skip_nframes % 2);
        bool found_setup = false;
 
        for (int i = 0; i < observed_nframes; i++) {
@@ -96,8 +97,8 @@ expect_backtrace(void)
 
                void *expected_saddr = expect_a ? recurse_a_fp : recurse_b_fp;
                void *observed_saddr = info.dli_saddr;
-               T_EXPECT_GE(observed_saddr, expected_saddr,
-                               "frame %d (%p) matches", i, observed_bt[i]);
+               T_EXPECT_EQ(observed_saddr, expected_saddr,
+                "frame %d (%p: %s) matches", i, observed_bt[i], info.dli_sname);
                expect_a = !expect_a;
        }
 
@@ -113,7 +114,6 @@ T_DECL(backtrace, "ensure backtrace(3) gives the correct backtrace")
 T_DECL(backtrace_from_fp,
                "ensure backtrace_from_fp(3) starts from the correct frame")
 {
-       const int skip_nframes = 5;
        setup_and_backtrace(expected_nframes + skip_nframes, skip_nframes);
        expect_backtrace();
 }
@@ -149,3 +149,23 @@ T_DECL(backtrace_image_offsets,
 
        T_EXPECT_TRUE(found_setup, "should have found the setup frame");
 }
+
+T_DECL(backtrace_symbols, "tests backtrace_symbols")
+{
+       setup_and_backtrace(expected_nframes, 0);
+
+       char **symbols = backtrace_symbols(observed_bt, observed_nframes);
+
+       bool found_setup = false;
+
+       for (int i = 0; i < observed_nframes; i++) {
+               T_LOG("frame[%d]: %s", i, symbols[i]);
+               if (strstr(symbols[i], "setup_and_backtrace") != NULL) {
+                       found_setup = true;
+               }
+       }
+
+       T_EXPECT_TRUE(found_setup, "should have found the setup frame");
+
+       free(symbols);
+}