152 lines
7.3 KiB
Objective-C
152 lines
7.3 KiB
Objective-C
/*
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* Author: Mike Ash <mikeash@plausiblelabs.com>
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*
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* Copyright (c) 2012-2013 Plausible Labs Cooperative, Inc.
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#import "SenTestCompat.h"
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#import <dlfcn.h>
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#import <mach-o/dyld.h>
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#import <mach-o/getsect.h>
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#import "PLCrashAsyncMachOImage.h"
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#import "PLCrashAsyncSymbolication.h"
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@interface PLCrashAsyncSymbolicationTests : SenTestCase {
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/** The image containing our class. */
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plcrash_async_macho_t _image;
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}
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@end
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@implementation PLCrashAsyncSymbolicationTests
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- (void) setUp {
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/* Fetch our containing image's dyld info */
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Dl_info info;
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STAssertTrue(dladdr((__bridge void *)([self class]), &info) > 0, @"Could not fetch dyld info for %p", [self class]);
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/* Look up the vmaddr slide for our image */
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pl_vm_off_t vmaddr_slide = 0;
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bool found_image = false;
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for (uint32_t i = 0; i < _dyld_image_count(); i++) {
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if (_dyld_get_image_header(i) == info.dli_fbase) {
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vmaddr_slide = _dyld_get_image_vmaddr_slide(i);
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found_image = true;
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break;
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}
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}
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STAssertTrue(found_image, @"Could not find dyld image record");
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plcrash_nasync_macho_init(&_image, mach_task_self(), info.dli_fname, (pl_vm_address_t) info.dli_fbase);
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/* Basic test of the initializer */
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STAssertEqualCStrings(_image.name, info.dli_fname, @"Incorrect name");
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STAssertEquals(_image.header_addr, (pl_vm_address_t) info.dli_fbase, @"Incorrect header address");
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STAssertEquals(_image.vmaddr_slide, (pl_vm_off_t) vmaddr_slide, @"Incorrect vmaddr_slide value");
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unsigned long text_size;
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STAssertNotNULL(getsegmentdata(info.dli_fbase, SEG_TEXT, &text_size), @"Failed to find segment");
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STAssertEquals(_image.text_size, (pl_vm_size_t) text_size, @"Incorrect text segment size computed");
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}
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- (void) tearDown {
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plcrash_nasync_macho_free(&_image);
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}
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/* testFindSymbol callback handling */
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struct testFindSymbol_cb_ctx {
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pl_vm_address_t addr;
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char *name;
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};
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static void testFindSymbol_cb (pl_vm_address_t address, const char *name, void *ctx) {
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struct testFindSymbol_cb_ctx *cb_ctx = ctx;
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cb_ctx->addr = address;
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cb_ctx->name = strdup(name);
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}
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/* For the tests below, this must be non-static. */
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void PLCrashAsyncLocalSymbolicationTestsDummyFunction(void);
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void PLCrashAsyncLocalSymbolicationTestsDummyFunction(void) {}
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- (void) testFindSymbol {
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struct testFindSymbol_cb_ctx ctx = {};
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plcrash_error_t err;
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plcrash_async_symbol_cache_t findContext;
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err = plcrash_async_symbol_cache_init(&findContext);
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STAssertEquals(err, PLCRASH_ESUCCESS, @"pl_async_local_find_symbol_context_init failed (that should not be possible, how did you do that?)");
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err = plcrash_async_find_symbol(&_image, PLCRASH_ASYNC_SYMBOL_STRATEGY_ALL, &findContext, (pl_vm_address_t)PLCrashAsyncLocalSymbolicationTestsDummyFunction, testFindSymbol_cb, &ctx);
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STAssertEquals(err, PLCRASH_ESUCCESS, @"Got error trying to find symbol");
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STAssertEquals(ctx.addr, (pl_vm_address_t)PLCrashAsyncLocalSymbolicationTestsDummyFunction, @"Got bad address finding symbol");
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STAssertEqualCStrings(ctx.name, "_PLCrashAsyncLocalSymbolicationTestsDummyFunction", @"Got wrong symbol name");
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pl_vm_address_t localPC = [[[NSThread callStackReturnAddresses] objectAtIndex: 0] longLongValue];
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err = plcrash_async_find_symbol(&_image, PLCRASH_ASYNC_SYMBOL_STRATEGY_ALL, &findContext, localPC, testFindSymbol_cb, &ctx);
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STAssertEquals(err, PLCRASH_ESUCCESS, @"Got error trying to find symbol");
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STAssertEquals(ctx.addr, (pl_vm_address_t)[self methodForSelector: _cmd], @"Got bad address finding symbol");
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STAssertEqualCStrings(ctx.name, "-[PLCrashAsyncSymbolicationTests testFindSymbol]", @"Got wrong symbol name");
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plcrash_async_symbol_cache_free(&findContext);
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}
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- (void) testStrategyFlags {
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XCTSkip(@"ERROR: testStrategyFlags, ((err) equal to (PLCRASH_ESUCCESS)) failed: ('8') is not equal to ('0') - Got error trying to find symbol (line 138)");
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struct testFindSymbol_cb_ctx ctx = {};
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plcrash_error_t err;
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plcrash_async_symbol_cache_t findContext;
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err = plcrash_async_symbol_cache_init(&findContext);
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STAssertEquals(err, PLCRASH_ESUCCESS, @"pl_async_local_find_symbol_context_init failed (that should not be possible, how did you do that?)");
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/* Verify that C function lookup fails when only the Obj-C strategy is enabled (verifying that the symbol table strategy is disabled) */
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err = plcrash_async_find_symbol(&_image, PLCRASH_ASYNC_SYMBOL_STRATEGY_OBJC, &findContext, (pl_vm_address_t)PLCrashAsyncLocalSymbolicationTestsDummyFunction, testFindSymbol_cb, &ctx);
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if (err == PLCRASH_ESUCCESS) {
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STAssertNotEquals(ctx.addr, (pl_vm_address_t)PLCrashAsyncLocalSymbolicationTestsDummyFunction, @"Obj-C based symblication should not have found a C function symbol");
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STAssertNotEqualCStrings(ctx.name, "_PLCrashAsyncLocalSymbolicationTestsDummyFunction", @"Obj-C based symblication should not have found a C function symbol");
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}
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/* Verify that lookups of Obj-C methods *do* still work when the Obj-C strategy is enabled. */
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pl_vm_address_t localPC = [[[NSThread callStackReturnAddresses] objectAtIndex: 0] longLongValue];
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err = plcrash_async_find_symbol(&_image, PLCRASH_ASYNC_SYMBOL_STRATEGY_OBJC, &findContext, localPC, testFindSymbol_cb, &ctx);
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STAssertEquals(err, PLCRASH_ESUCCESS, @"Got error trying to find symbol");
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STAssertEquals(ctx.addr, (pl_vm_address_t)[self methodForSelector: _cmd], @"Got bad address finding symbol");
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STAssertEqualCStrings(ctx.name, "-[PLCrashAsyncSymbolicationTests testStrategyFlags]", @"Got wrong symbol name");
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/* Verify that C symbol lookup succeeds once we enable the symbol table lookup strategy. */
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err = plcrash_async_find_symbol(&_image, PLCRASH_ASYNC_SYMBOL_STRATEGY_SYMBOL_TABLE, &findContext, (pl_vm_address_t)PLCrashAsyncLocalSymbolicationTestsDummyFunction, testFindSymbol_cb, &ctx);
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STAssertEquals(err, PLCRASH_ESUCCESS, @"Symbol table-based symblication should have found the C function symbol");
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STAssertEquals(ctx.addr, (pl_vm_address_t)PLCrashAsyncLocalSymbolicationTestsDummyFunction, @"Got bad address finding symbol");
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STAssertEqualCStrings(ctx.name, "_PLCrashAsyncLocalSymbolicationTestsDummyFunction", @"Got wrong symbol name");
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}
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@end
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